CN117758193A - Preparation method of nickel-aluminum hydrogen-resistant coating and nickel-aluminum hydrogen-resistant coating - Google Patents
Preparation method of nickel-aluminum hydrogen-resistant coating and nickel-aluminum hydrogen-resistant coating Download PDFInfo
- Publication number
- CN117758193A CN117758193A CN202410194642.3A CN202410194642A CN117758193A CN 117758193 A CN117758193 A CN 117758193A CN 202410194642 A CN202410194642 A CN 202410194642A CN 117758193 A CN117758193 A CN 117758193A
- Authority
- CN
- China
- Prior art keywords
- aluminum
- nickel
- cooling
- coating
- hydrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 110
- 238000000576 coating method Methods 0.000 title claims abstract description 110
- 239000001257 hydrogen Substances 0.000 title claims abstract description 80
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 80
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 91
- 230000006698 induction Effects 0.000 claims abstract description 78
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 72
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 50
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 47
- 238000007751 thermal spraying Methods 0.000 claims abstract description 27
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 14
- 230000008018 melting Effects 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 239000000112 cooling gas Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 26
- 229910000765 intermetallic Inorganic materials 0.000 claims description 18
- 230000004888 barrier function Effects 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 229910001005 Ni3Al Inorganic materials 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 25
- 239000010410 layer Substances 0.000 description 67
- 230000000694 effects Effects 0.000 description 20
- 239000002244 precipitate Substances 0.000 description 14
- 238000005728 strengthening Methods 0.000 description 11
- 239000011247 coating layer Substances 0.000 description 10
- 230000007547 defect Effects 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000001755 magnetron sputter deposition Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- YYCNOHYMCOXPPJ-UHFFFAOYSA-N alumane;nickel Chemical group [AlH3].[Ni] YYCNOHYMCOXPPJ-UHFFFAOYSA-N 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000010288 cold spraying Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009439 industrial construction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- -1 nickel-aluminum compound Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Landscapes
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention belongs to the field of hydrogen-resistant materials, and relates to a preparation method of a nickel-aluminum hydrogen-resistant coating and the nickel-aluminum hydrogen-resistant coating, wherein the preparation method comprises the following steps: carrying out thermal spraying on the substrate to obtain a precoating layer, wherein the raw materials for thermal spraying comprise nickel and aluminum; and carrying out heating and cooling treatment on the precoating to obtain the nickel aluminum hydrogen-resistant coating, wherein the heating and cooling treatment conditions comprise: the electrified induction coil moves along the preset direction of the precoat, the cooling pipe for introducing cooling air synchronously moves along the preset direction along the induction coil, the cooling air cools the induction-heated precoat, and the surface temperature of the precoat is 0.9-1 time of the melting point of aluminum through induction heating. The aluminum oxide hydrogen-resistant film of the hydrogen-resistant coating prepared by the invention is not easy to crack and peel off, and has strong adhesion with an aluminum substrate.
Description
Technical Field
The invention belongs to the technical field of hydrogen-resistant materials, and particularly relates to a preparation method of a nickel-aluminum hydrogen-resistant coating and the nickel-aluminum hydrogen-resistant coating.
Background
The hydrogen energy has the advantages of no pollution, wide sources, high heat value, renewable circulation and the like, is the safest, clean and high heat value fuel in the future, and has very important roles in the industries of nuclear power, petroleum, chemical industry, energy and the like. The preparation, processing and storage of hydrogen are critical to the industrialized development of hydrogen energy. When the conventional steel is used as the material of the hydrogen storage system, the high-pressure hydrogen environment is easy to cause a series of hydrogen embrittlement problems such as plastic reduction, fatigue crack growth acceleration and the like of the steel material, and the preparation of the hydrogen-resistant coating on the surface of the steel material is proposed to prevent or delay the penetration of hydrogen into the material, so that the occurrence of the hydrogen embrittlement phenomenon is prevented and reduced.
The aluminum oxide can play a role in hydrogen resistance, and the compact aluminum oxide layer can improve the hydrogen resistance of the material by tens to hundreds of times. The prior art relates to a method for preparing a layer of aluminum on the surface of a substrate by chemical vapor deposition, magnetron sputtering, anodic oxidation or cold spraying, and preparing a layer of aluminum oxide hydrogen-resistant film on the surface of an aluminum coating by adopting a thermal oxidation method, wherein the difference of thermal expansion coefficient and mechanical property between the aluminum oxide hydrogen-resistant film and an aluminum substrate is larger, and thermal stress is easily formed in the aluminum oxide film in the heating and cooling processes, so that the aluminum oxide film is cracked or peeled off.
Disclosure of Invention
The invention aims to overcome the defect that an aluminum oxide hydrogen-resistant film is easy to crack or peel in the prior art, and provides a preparation method of a nickel aluminum hydrogen-resistant coating and the nickel aluminum hydrogen-resistant coating.
In order to achieve the above object, in a first aspect, the present invention provides a method for preparing a nickel aluminum hydrogen barrier coating, comprising the steps of:
Carrying out thermal spraying on the substrate to obtain a precoating layer, wherein the raw materials for thermal spraying comprise nickel and aluminum;
And carrying out heating and cooling treatment on the precoating to obtain the nickel aluminum hydrogen-resistant coating, wherein the heating and cooling treatment conditions comprise: the electrified induction coil moves along the preset direction of the precoat, the cooling pipe for introducing cooling air synchronously moves along the preset direction along the induction coil, the cooling air cools the induction-heated precoat, and the surface temperature of the precoat is 0.9-1 time of the melting point of aluminum through induction heating.
In some preferred embodiments, the cooling tube is disposed vertically with respect to the surface of the precoat layer as the cooling gas cools the induction-heated precoat layer, and the cooling gas flows from directly above the precoat layer to the precoat layer.
Preferably, when the axis of the induction coil is perpendicular to the surface of the coating, the ratio of the diameter of the induction coil to the diameter of the cooling air outlet of the cooling pipe is 0.95-1.05, and when the axis of the induction coil is parallel to the surface of the coating, the ratio of the diameter and the length of the induction coil to the diameter of the cooling air outlet of the cooling pipe is 0.95-1.05.
preferably, in the cooling pipe, the flow rate of the cooling gas is 30-100 m/min.
In some preferred embodiments, the speed of movement of the induction coil and the cooling tube along the predetermined direction is in the range of 5cm/min to 10cm/min.
In some preferred embodiments, the mass ratio of nickel to aluminum in the raw material for thermal spraying is 0.05-0.12.
In some preferred embodiments, the thermally sprayed feedstock is a wire of aluminum wire mechanically compounded with nickel wire.
in some preferred embodiments, the thermal spray is arc spray.
In a second aspect, the present invention provides a nickel aluminum hydrogen barrier coating prepared by the preparation method of the first aspect, the coating comprising a precipitated phase of a nickel aluminum intermetallic compound comprising Ni3Al, wherein the surface of the coating is provided with an alumina film layer.
in some preferred embodiments, the size of the precipitated phase is 0.05 μm to 0.5 μm.
According to the invention, firstly, an aluminum-nickel precoat is prepared on the surface of a substrate through thermal spraying, then, the precoat is subjected to heating and cooling treatment, wherein the heating and cooling treatment comprises synchronous movement of an electrified induction coil and a cooling pipe in a preset direction, the surface temperature of the precoat reaches 0.9-1 time of the melting point of aluminum through induction heating, and cooling air cools the inductively heated precoat. The surface temperature of the coating reaches 0.9-1 times of the melting point of aluminum by induction heating, aluminum and nickel can be subjected to fusion reaction, aluminum can be heated and oxidized, a cooling pipe with cooling gas is moved synchronously along with an induction coil, the pre-coating subjected to induction heating is cooled rapidly by the cooling gas, a nickel-aluminum intermetallic compound precipitated phase can be formed, and a compact aluminum oxide film layer is formed on the surface of the aluminum-nickel pre-coating in situ, so that the nickel-aluminum hydrogen-resistant coating has a good hydrogen-resistant effect. By adopting the aluminum nickel coating, on one hand, the difference of the thermal expansion coefficients between the aluminum metal base layer and the aluminum oxide hydrogen-resistant film layer can be reduced, on the other hand, a nickel aluminum intermetallic compound precipitated phase is formed in the heating and cooling processes, the aluminum metal base layer can be reinforced, the mechanical matching property between the aluminum metal base layer and the aluminum oxide hydrogen-resistant film layer can be enhanced, and therefore the adhesiveness between the aluminum oxide hydrogen-resistant film layer and the aluminum metal base layer can be improved, and the aluminum oxide hydrogen-resistant film layer is not easy to crack and peel off.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a process for preparing a nickel aluminum hydrogen barrier coating of the present invention.
FIG. 2 is a photomicrograph of the appearance of the nickel aluminum hydrogen barrier coating of example 1 of the present invention.
Description of the reference numerals
1. a base; 2. a precoating layer; 3. nickel aluminum hydrogen-resistant coating; 4. an induction coil; 5. and (5) cooling the tube.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The present inventors have studied and found that the alumina hydrogen barrier film of the prior art is liable to crack or peel off from the aluminum base layer.
in this first aspect, referring to fig. 1, the present invention provides a method for preparing a nickel aluminum hydrogen barrier coating, including the steps of:
Carrying out thermal spraying on the substrate 1 to obtain a precoat layer 2, wherein the raw materials for thermal spraying comprise nickel and aluminum;
And carrying out heating and cooling treatment on the precoat to obtain the nickel aluminum hydrogen-resistant coating 3, wherein the heating and cooling treatment conditions comprise: the energized induction coil 4 moves along the preset direction of the precoat layer 2, the cooling pipe 5 for introducing cooling air synchronously moves along the preset direction along with the induction coil 4, the cooling air cools the precoat layer 2 subjected to induction heating, and the surface temperature of the precoat layer 2 is 0.9-1 time of the melting point of aluminum through induction heating.
In the preparation process of the hydrogen-resistant coating, firstly, thermal spraying is carried out on a substrate to obtain an aluminum-nickel precoat, then, heating and cooling treatment is carried out on the aluminum-nickel precoat, in the heating and cooling treatment process, an electrified induction coil moves along the preset direction of the precoat, induction heating enables the surface temperature of the precoat to reach 0.9-1 time of the melting point of aluminum, a cooling pipe for introducing cooling gas moves synchronously along with the induction coil, and the cooling gas cools the induction-heated precoat. After thermal spraying, the coating is induction heated at a specific temperature, and after induction heating, rapid cooling is performed. In the process of induction heating to cooling at a specific temperature, a compact aluminum oxide film layer is formed on the surface of the aluminum nickel coating, so that the hydrogen resistance of the coating can be improved; in the process of heating to cooling by induction at a specific temperature, the aluminum and the nickel in the coating are subjected to fusion reaction by induction heating, and then are rapidly cooled, so that Ni can be formed3Ni-based intermetallic compound precipitate phase of Al-based nickel and aluminum3The strengthening tissue effect of the Al precipitated phase can strengthen the aluminum metal base layer; in the induction heating process at a specific temperature, the aluminum nickel part in the coating is enabled to diffuse into the matrix, the binding force between the coating and the matrix can be improved, in the induction heating to cooling process at the specific temperature, the structure of the coating is remodelled, microscopic defects such as pores inside the aluminum nickel coating can be reduced, the coating is enabled to be more compact, and the binding force between the aluminum nickel coating and the matrix is further improved. By adopting the aluminum nickel coating, on one hand, the difference of the thermal expansion coefficients between the aluminum metal base layer and the aluminum oxide hydrogen-resistant film layer can be reduced, on the other hand, in the heating and cooling processes, a nickel aluminum intermetallic compound precipitated phase is formed, the aluminum metal base layer can be reinforced, the mechanical matching property between the aluminum metal base layer and the aluminum oxide hydrogen-resistant film layer can be enhanced, so that the adhesiveness between the aluminum oxide hydrogen-resistant film layer and the aluminum metal base layer can be improved, the aluminum oxide hydrogen-resistant film layer is not easy to crack and peel off, the nickel aluminum intermetallic compound precipitated phase is formed, the aluminum metal base layer is reinforced, and the mechanical matching property between the aluminum metal base layer and a base material can be also increased. The arrows in fig. 1 illustrate the direction of movement of the induction coil and the cooling tube.
the induction heating of the invention ensures that the surface temperature of the precoat is not higher than 1 time of the melting point of aluminum, can avoid excessive heat influence of molten aluminum on the base material, causes heat damage to the base material, ensures that the surface temperature of the precoat is not lower than 0.9 time of the melting point of aluminum, can ensure that the aluminum and nickel fully perform fusion reaction, and promotes Ni in the rapid cooling process3Precipitation of Al phase to improve Ni3The quantity of the Al phase educts fully strengthens the aluminum metal base layer, can promote the structural remodelling to the maximum extent and reduce the microscopic defects in the coating.
the raw materials for thermal spraying are nickel and aluminum, so that a compact aluminum oxide film layer can be formed on the surface of the coating, the coating has a good hydrogen resistance effect, and the aluminum oxide hydrogen resistance film layer is prevented from cracking and peeling.
The invention adopts a thermal spraying mode to prepare the nickel-aluminum precoat, then carries out induction heating on the nickel-aluminum precoat, adopts a total heat process to prepare the hydrogen-resistant coating, fully carries out metallurgical bonding on the coating and a matrix, ensures that the internal structure of the coating is in a compact stable state, and can be applied at normal temperature and a certain high temperature, thereby having wider application range. Meanwhile, compared with magnetron sputtering spraying, thermal spraying is more suitable for large-scale equipment, can prepare the hydrogen-resistant coating on site, compared with anodic oxidation, does not need to disassemble the large-scale equipment into small parts for surface treatment, and can meet the requirement of preparing the hydrogen-resistant coating on site of the large-scale equipment.
According to the invention, the precoat is prepared by adopting thermal spraying, the induction coil moves along the preset direction of the precoat for induction heating, and the cooling pipe for introducing cooling gas moves synchronously along the induction coil to rapidly cool the inductively heated coating, so that the hydrogen-resistant coating is prepared, the operation is easy, and the industrial construction of a large tank body and a large pipeline can be realized.
it will be appreciated that in the heating and cooling process, a separation structure of a heating zone and a cooling zone is provided between the induction coil and the cooling pipe for introducing cooling gas, so as to inhibit the cooling gas from entering the heating zone and heat from being conducted to the cooling zone, and specifically, for example, the cooling plate may be used to inhibit the cooling gas from entering the heating zone of the induction coil, improve the induction heating effect, inhibit the heat from being conducted to the cooling zone, so as not to affect the cooling effect, and affect the Ni3Precipitation of Al phase. The surface temperature of the precoat can be monitored in real time through an infrared thermometer, and the surface temperature of the precoat is 0.9-1 time of the melting point of aluminum by adjusting the magnitude of the induction heating current.
In some preferred embodiments, the cooling pipe is disposed vertically with respect to the surface of the pre-coating layer when the cooling gas cools the pre-coating layer subjected to induction heating, and the cooling gas flows from directly above the pre-coating layer to the pre-coating layer. Under the preferred scheme, the cooling gas flows from the position right above the precoat to the precoat, so that the cooling efficiency of the precoat after induction heating can be improved, the cooling is more beneficial to the precipitation phase of fine nickel-aluminum intermetallic compounds in the coating, the strengthening tissue effect of the precipitation phase is improved, and the aluminum metal base layer is fully strengthened.
Preferably, when the axis of the induction coil is perpendicular to the surface of the coating, the ratio of the diameter of the induction coil to the diameter of the cooling air outlet of the cooling pipe is 0.95-1.05, and when the axis of the induction coil is parallel to the surface of the coating, the ratio of the diameter and the length of the induction coil to the diameter of the cooling air outlet of the cooling pipe is 0.95-1.05. Under the preferred scheme, when the axis of the induction coil is perpendicular to the surface of the coating, the ratio of the diameter of the induction coil to the diameter of the cooling air outlet of the cooling pipe is 0.95-1.05, and when the axis of the induction coil is parallel, the ratio of the diameter and the length of the induction coil to the diameter of the cooling air outlet of the cooling pipe is 0.95-1.05 respectively, so that the coating can be heated and cooled more uniformly, the performance and the tissue uniformity of the nickel-aluminum hydrogen-resistant coating are improved more favorably, after the heating and cooling, a uniform aluminum oxide film is formed on the surface of the coating, and Ni is uniformly distributed in the whole coating3The Al phase is separated out, so that the uniformity of the mechanical property of the coating is improved, the microscopic defect of the whole coating is reduced, and the binding force of the whole coating is improved.
Preferably, in the cooling pipe, the flow rate of the cooling gas is 30-100 m/min. Under the preferred scheme, when the cooling gas flows from the position right above the precoat to the precoat, the flow speed of the cooling gas in the cooling pipe is not lower than 30m/min, the precipitated phase of the nickel-aluminum intermetallic compound is finer, the distribution in the coating is more uniform, the size of the precipitated phase is not higher than 0.5 mu m, the strengthening tissue effect of the precipitated phase is improved, and the aluminum metal base layer is fully strengthened.
In some preferred embodiments, along the preset direction, the moving speed of the induction coil and the cooling tube is 5cm/min-10cm/min, under the preferred scheme, the moving speed of the induction coil is not higher than 10cm/min, the induction coil is more favorable for fully carrying out heated oxidation on aluminum in the induction heating process, the aluminum and nickel are fully subjected to fusion reaction, a compact aluminum oxide film is formed after cooling, the number of nickel-aluminum intermetallic compound precipitates in the hydrogen-resistant coating is further improved, thereby further strengthening the aluminum metal base layer, improving the mechanical matching property between the aluminum metal base layer and the aluminum oxide hydrogen-resistant film layer, further reducing the microscopic defects in the aluminum-nickel coating, improving the binding force between the aluminum-nickel coating and a matrix, ensuring that the moving speed of the induction coil is not lower than 5cm/min, more favorable for avoiding heat damage to a base material, ensuring that cooling gas flows to the precoat from the right above the precoat, and when the flow speed of the cooling gas is 30 m/min-100 m/min, the moving speed of the cooling tube is not higher than 10cm/min, the nickel-aluminum intermetallic compound can be rapidly cooled to lower temperature, the nickel-aluminum intermetallic compound can be more favorable for strengthening the effect of aluminum phase precipitation.
In some preferred embodiments, the precoat layer has a thickness of 10 microns to 100 microns. Under the preferred scheme, the thickness of the precoating layer is not higher than 100 micrometers, nickel-aluminum intermetallic compound precipitated phases are more favorably and uniformly distributed in the thickness direction of the coating layer, aluminum nickel in the coating layer is diffused into a matrix, microscopic defects of a coating structure close to the matrix are reduced, the binding force between the aluminum nickel coating layer and the matrix is improved, the thickness of the precoating layer is not lower than 10 micrometers, and the substrate is more favorably prevented from being damaged by heat.
in some preferred embodiments, the mass ratio of nickel to aluminum in the raw material for thermal spraying is 0.05-0.12. Under the preferred scheme, the mass ratio of nickel to aluminum is 0.05-0.12, the surface temperature of the precoat layer reaches 0.9-1 times of the melting point of aluminum through induction heating after thermal spraying, the aluminum and nickel are subjected to fusion reaction, and cooling gas is rapidly cooled after induction heating, so that the Ni in the nickel-aluminum hydrogen-resistant coating is more beneficial to improvement3The quantity of the Al phase precipitates improves the effect of strengthening the aluminum metal base layer by the precipitated phases. Further preferably, the nickel content of the thermal spraying raw material is 5-10wt% and the aluminum content of the thermal spraying raw material is 90-95wt%, so that the nickel-aluminum hydrogen-resistant coating is more beneficial to improving the Ni content of the nickel-aluminum hydrogen-resistant coating3the quantity of the Al precipitated phases improves the effect of reinforcing the aluminum metal base layer by the precipitated phases.
In some preferred embodiments, the thermally sprayed feedstock is a wire of aluminum wire mechanically compounded with nickel wire. In the preferred scheme, the composite wire material of the aluminum wire and the nickel wire is used as the thermal spraying raw material, and the composite wire material has good flexibility and is more beneficial to improving the spraying effect.
In some preferred embodiments, the thermal spray is arc spray. In the preferred scheme, the thermal spraying is performed in an electric arc spraying mode, so that the spraying effect is improved.
In a second aspect, the present invention provides a nickel aluminum hydrogen barrier coating prepared by the preparation method of the first aspect, the coating comprising a precipitated phase of a nickel aluminum intermetallic compound comprising Ni3Al, wherein the surface of the coating is provided with an alumina film layer.
the coating comprises a precipitated phase of a nickel-aluminum intermetallic compound including Ni3al, the surface of the coating is provided with an alumina film layer, and the coating has good hydrogen resistance effect and can prevent the alumina hydrogen resistance film layer from cracking and peeling.
In some preferred embodiments, the size of the precipitated phase is 0.05 μm to 0.5 μm, which is more beneficial to improving the effect of strengthening the aluminum metal base layer by the precipitated phase.
The invention will be further described in detail with reference to specific examples.
Example 1
The preparation method of the nickel aluminum hydrogen-resistant coating comprises the following steps:
Step one: carrying out thermal spraying by adopting an electric arc spraying method to obtain a precoat containing aluminum and nickel, wherein the average thickness of the precoat is 50 microns, the spraying raw material is a wire material of mechanical composite of aluminum wires and nickel wires, the nickel wires account for 8wt% and the aluminum wires account for 92wt%;
Step two: and (3) carrying out heating and cooling treatment on the precoat to obtain a nickel aluminum hydrogen-resistant coating, wherein in the heating and cooling treatment process, an electrified induction coil, a heat insulation plate and a cooling pipe for introducing cooling gas synchronously move above the precoat at a moving speed of 8cm/min along the length direction, the cooling gas cools the precoat subjected to induction heating, the axis of the induction coil is vertical to the surface of the coating, the diameter of the induction coil is the same as the diameter of a cooling gas outlet of the cooling pipe, the surface temperature of the precoat is 0.95 time of the melting point of aluminum by adjusting the current of the induction coil, the cooling pipe is vertically arranged relative to the surface of the precoat, the cooling gas flows to the precoat from the position right above the precoat, and the flow speed of the cooling gas in the cooling pipe is 50m/min.
The nickel aluminum hydrogen-resistant coating prepared by the embodiment has a compact aluminum oxide film on the surface, and has few microscopic defects in the coating, high density and strong bonding force between the coating and a substrate. The precipitated phase in the nickel-aluminum hydrogen-resistant coating is characterized by adopting a metallographic method, referring to FIG. 2, the precipitated phase is uniformly distributed in the coating, the proportion of the precipitated phase is extremely high, and the size of the precipitated phase is 0.05-0.32 mu m.
Example 2
The preparation method according to example 1 was carried out, except that in the second step, the cooling tube was disposed parallel to the surface of the precoat layer, the flow direction of the cooling gas was perpendicular to the moving direction of the induction coil and the cooling tube, and the cooling gas flowed from the surface of the coating layer to be cooled. The nickel aluminum hydrogen-resistant coating prepared by the embodiment has a compact aluminum oxide film on the surface, and has few microscopic defects in the coating, high density and strong bonding force between the coating and a substrate. The metallographic method is adopted to represent the precipitated phase in the nickel aluminum hydrogen-resistant coating, the precipitated phase in the coating is distributed uniformly, the proportion of the precipitated phase is extremely high, and the size of the precipitated phase is 0.86-1.35 mu m.
Example 3
The preparation method of example 1 was performed with the difference that in the second step, the energized induction coil, the heat shield and the cooling pipe through which the cooling gas was introduced were synchronously moved above the precoat layer in the longitudinal direction at a moving speed of 12 cm/min. The metallographic method is adopted to represent the precipitated phase in the nickel-aluminum hydrogen-resistant coating, the precipitated phase is uniformly distributed in the coating, the proportion of the precipitated phase is relatively high, and the size of the precipitated phase is 0.23-0.41 mu m.
Example 4
the procedure of example 1 was followed, except that in the second step, the flow rate of the cooling gas in the cooling tube was 20m/min. The metallographic method is adopted to represent the precipitated phase in the nickel aluminum hydrogen-resistant coating, the precipitated phase in the coating is distributed uniformly, the proportion of the precipitated phase is extremely high, and the size of the precipitated phase is 0.53-0.72 mu m.
Example 5
The preparation method of example 1 was conducted, except that in the first step, the nickel wires were 3wt% and the aluminum wires were 97wt%. The metallographic method is adopted to represent the precipitated phase in the nickel-aluminum hydrogen-resistant coating, the precipitated phase is uniformly distributed in the coating, the proportion of the precipitated phase is relatively high, and the size of the precipitated phase is 0.14-0.38 mu m.
Comparative example 1
The procedure of example 1 was followed, except that in the second step, only the energized induction coil was moved above the precoat layer at a moving speed of 8cm/min in the longitudinal direction, and cooling was performed without introducing cooling gas, and natural cooling was employed. The metallographic method is adopted to represent the precipitated phases in the nickel aluminum hydrogen-resistant coating, the precipitated phases in the coating are unevenly distributed, the proportion of the precipitated phases is extremely high, and the size of the precipitated phases is 2.85-5.26 mu m.
Comparative example 2
The preparation method of example 1 was performed with the difference that in the second step, the surface temperature of the precoat layer was 0.85 times the melting point of aluminum by adjusting the current of the induction coil. There are small amounts of microscopic defects inside the coating. And a metallographic method is adopted to represent the precipitated phases in the nickel-aluminum hydrogen-resistant coating, the precipitated phases in the coating are unevenly distributed, the proportion of the precipitated phases is low, and the size of the precipitated phases is 0.18-0.39 mu m.
Comparative examples 1 and 1, in which a fine intermetallic nickel-aluminum compound precipitate phase can be obtained by simultaneous cooling with the introduction of a cooling gas after induction heating, the effect of strengthening an aluminum metal base layer by the precipitate phase can be improved, and comparative examples 1 and 2, in which the surface temperature of the precoat layer is not lower than 0.9 times the melting point of aluminum by induction heating, can be improved3the quantity of the Al phase precipitates improves the effect of strengthening the aluminum metal base layer by the precipitated phases.
Comparative examples 1 and 2, wherein the cooling gas flowed from directly above the precoat layer to the precoat layer, more advantageous to obtain a fine nickel-aluminum intermetallic compound precipitate phase in the coating layer after cooling, and to enhance the effect of the precipitate phase to strengthen the aluminum metal base layer, and comparative examples 1, 3 and 4, wherein the flow rate of the cooling gas in the cooling tube is not less than 30m/min, more advantageous to obtain a fine nickel-aluminum intermetallic compound precipitate phase, and to enhance the effect of the precipitate phase to strengthen the aluminum metal base layer, and further, the moving speed of the induction coil and the cooling tube is not more than 10cm/min, more advantageous to obtain a fine nickel-aluminum intermetallic compound precipitate phase in the coating layer, and more advantageous to enhance Ni3the amount of Al phase precipitate further improves the effect of strengthening the aluminum metal base layer by the precipitate phase, and in comparative examples 1 and 5, the mass ratio of nickel to aluminum in the raw materials for thermal spraying is 0.05-0.12, which is more favorable for improving Ni3the quantity of the Al phase precipitates improves the effect of strengthening the aluminum metal base layer by the precipitated phases.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.
Claims (10)
1. the preparation method of the nickel aluminum hydrogen-resistant coating is characterized by comprising the following steps of:
Carrying out thermal spraying on the substrate to obtain a precoating layer, wherein the raw materials for thermal spraying comprise nickel and aluminum;
And carrying out heating and cooling treatment on the precoating to obtain the nickel aluminum hydrogen-resistant coating, wherein the heating and cooling treatment conditions comprise: the electrified induction coil moves along the preset direction of the precoat, the cooling pipe for introducing cooling air synchronously moves along the preset direction along the induction coil, the cooling air cools the induction-heated precoat, and the surface temperature of the precoat is 0.9-1 time of the melting point of aluminum through induction heating.
2. The production method according to claim 1, wherein the cooling pipe is disposed vertically with respect to the surface of the precoat layer when the cooling gas cools the induction-heated precoat layer, and the cooling gas flows from directly above the precoat layer to the precoat layer.
3. The method according to claim 2, wherein when the axis of the induction coil is perpendicular to the surface of the coating, the ratio of the diameter of the induction coil to the diameter of the cooling gas outlet of the cooling tube is 0.95-1.05, and when the axis of the induction coil is parallel to the surface of the coating, the ratio of the diameter and the length of the induction coil to the diameter of the cooling gas outlet of the cooling tube is 0.95-1.05, respectively.
4. The production method according to claim 2, wherein the flow rate of the cooling gas in the cooling pipe is 30m/min to 100m/min.
5. the manufacturing method according to claim 1 or 4, wherein a moving speed of the induction coil and the cooling tube in the preset direction is 5cm/min to 10cm/min.
6. The preparation method of claim 1, wherein the mass ratio of nickel to aluminum in the thermal spraying raw material is 0.05-0.12.
7. the method according to claim 1, wherein the thermal spraying material is a wire material of mechanically composite aluminum wire and nickel wire.
8. the method of manufacturing according to claim 1, wherein the thermal spraying is arc spraying.
9. A nickel-aluminum hydrogen barrier coating prepared by the preparation method according to any one of claims 1 to 8, wherein the coating contains a precipitated phase of a nickel-aluminum intermetallic compound comprising Ni3Al, wherein the surface of the coating is provided with an alumina film layer.
10. the nickel aluminum hydrogen barrier coating of claim 9, wherein the size of the precipitated phase is 0.05-0.5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410194642.3A CN117758193B (en) | 2024-02-22 | 2024-02-22 | Preparation method of nickel-aluminum hydrogen-resistant coating and nickel-aluminum hydrogen-resistant coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410194642.3A CN117758193B (en) | 2024-02-22 | 2024-02-22 | Preparation method of nickel-aluminum hydrogen-resistant coating and nickel-aluminum hydrogen-resistant coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117758193A true CN117758193A (en) | 2024-03-26 |
| CN117758193B CN117758193B (en) | 2024-04-30 |
Family
ID=90316790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410194642.3A Active CN117758193B (en) | 2024-02-22 | 2024-02-22 | Preparation method of nickel-aluminum hydrogen-resistant coating and nickel-aluminum hydrogen-resistant coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117758193B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020182311A1 (en) * | 2001-05-30 | 2002-12-05 | Franco Leonardi | Method of manufacturing electromagnetic devices using kinetic spray |
| RU2007114130A (en) * | 2007-04-16 | 2008-10-27 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") (RU) | METHOD FOR PRODUCING ALUMINIDE COATING ON THE SURFACE OF A PRODUCT FROM HEAT-RESISTANT ALLOY |
| CN102899605A (en) * | 2012-10-26 | 2013-01-30 | 集美大学 | Induction heating boronizing strengthening method of Q345 steel by using catalyst of nickel coated aluminum powder |
| CN103895282A (en) * | 2012-12-26 | 2014-07-02 | 北京有色金属研究总院 | Composite gradient hydrogen-resistant coating for high-temperature evacuated collector tube and preparation method thereof |
| CN103921493A (en) * | 2014-04-16 | 2014-07-16 | 同济大学 | Aluminium alloy substrate/NiAL coating composite material and preparation method thereof |
| CN105603424A (en) * | 2014-11-25 | 2016-05-25 | 中国科学院金属研究所 | Si-modified beta-(Ni,Pt)Al coating and preparation method thereof |
-
2024
- 2024-02-22 CN CN202410194642.3A patent/CN117758193B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020182311A1 (en) * | 2001-05-30 | 2002-12-05 | Franco Leonardi | Method of manufacturing electromagnetic devices using kinetic spray |
| RU2007114130A (en) * | 2007-04-16 | 2008-10-27 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") (RU) | METHOD FOR PRODUCING ALUMINIDE COATING ON THE SURFACE OF A PRODUCT FROM HEAT-RESISTANT ALLOY |
| CN102899605A (en) * | 2012-10-26 | 2013-01-30 | 集美大学 | Induction heating boronizing strengthening method of Q345 steel by using catalyst of nickel coated aluminum powder |
| CN103895282A (en) * | 2012-12-26 | 2014-07-02 | 北京有色金属研究总院 | Composite gradient hydrogen-resistant coating for high-temperature evacuated collector tube and preparation method thereof |
| CN103921493A (en) * | 2014-04-16 | 2014-07-16 | 同济大学 | Aluminium alloy substrate/NiAL coating composite material and preparation method thereof |
| CN105603424A (en) * | 2014-11-25 | 2016-05-25 | 中国科学院金属研究所 | Si-modified beta-(Ni,Pt)Al coating and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李猛进, 孙晓峰, 管恒荣, 姜晓霞, 胡壮麒: "(Ni, Pd)Al涂层的抗高温氧化性能", 金属学报, no. 04, 11 April 2003 (2003-04-11) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117758193B (en) | 2024-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101709470B (en) | Preparation method of composite coating containing in situ generated diffusion barrier | |
| KR102326967B1 (en) | Method of making textured coated electrode wire | |
| CN104308360B (en) | A kind of diffusion bonding method of graphite and low carbon steel, stainless steel | |
| CN102352477A (en) | Method for performing supersonic atmospheric plasma spraying of zirconium oxide on surface of crystallizer copper plate | |
| Zhang et al. | An assessment of the high-temperature oxidation resistance of selected thermal sprayed high entropy alloy coatings | |
| CN101112701A (en) | Thermal Spray Gradient Coating Processing Method Based on Multiple Laser Remelting | |
| CN115142018B (en) | A high-entropy alloy coating resistant to high-temperature liquid lead/lead-bismuth alloy corrosion and its preparation method | |
| CN103276394A (en) | Laser remelting one-step reinforcing processing method and device thereof for plasma sprayed thermal barrier coating with double-layer structure | |
| CN104264083B (en) | A kind of carbon fiber reinforced aluminum-lithium alloy composite material and preparation method thereof | |
| CN114850494A (en) | Multi-beam electron beam additive manufacturing method for high-entropy alloy foam structure | |
| CN117758193B (en) | Preparation method of nickel-aluminum hydrogen-resistant coating and nickel-aluminum hydrogen-resistant coating | |
| CN103114267A (en) | Preparation method of steel substrate surface aluminum oxide coat | |
| CN102312237A (en) | Laser strengthening method for steam turbine titanium alloy blade | |
| CN104164641A (en) | High amorphous aluminium-based metallic glass coating with multi-corrosion protection function and preparation method thereof | |
| CN101545087B (en) | Micro-composite Fe-Al/Al2O3 ceramic coating and its preparation method | |
| Medvedev et al. | Microstructure and properties of the Al-0.5 wt.% Fe alloy wire, copper-clad by electrochemical deposition | |
| CN103614698B (en) | A kind of High-temperature antioxidant niobium alloy compound coating and preparation method thereof | |
| CN105734480A (en) | Method for improving corrosion resistance of lead-cooled neutron reactor structural component | |
| CN110306216A (en) | An active element Re modified β-(Ni,Pt)-Al coating and its preparation process | |
| CN105063692B (en) | A kind of Fe V functionally gradient material (FGM)s and preparation method thereof | |
| CN114686794A (en) | Preparation method of nano YSZ/NiCoCrAlYTa composite coating on TiAl alloy surface | |
| XIONG et al. | Research progress of cold spray in Institute of Metal Research, Chinese Academy of Sciences | |
| Yin et al. | Summary on corrosion behavior and micro-arc oxidation for magnesium alloys | |
| CN118699394B (en) | Preparation method of copper-plated titanium alloy wire reinforced aluminum-based composite material | |
| CN101413103B (en) | A kind of method that infiltrates platinum thin film on zirconium surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |