CN117840458A - Heat treatment method of IN738 nickel-based alloy prepared by selective laser melting - Google Patents
Heat treatment method of IN738 nickel-based alloy prepared by selective laser melting Download PDFInfo
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- CN117840458A CN117840458A CN202211717353.4A CN202211717353A CN117840458A CN 117840458 A CN117840458 A CN 117840458A CN 202211717353 A CN202211717353 A CN 202211717353A CN 117840458 A CN117840458 A CN 117840458A
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- base alloy
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 238000010438 heat treatment Methods 0.000 title claims abstract description 78
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 56
- 239000000956 alloy Substances 0.000 title claims abstract description 56
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000002844 melting Methods 0.000 title claims abstract description 18
- 230000008018 melting Effects 0.000 title claims abstract description 18
- 238000001513 hot isostatic pressing Methods 0.000 claims abstract description 13
- 230000035882 stress Effects 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 38
- 238000004321 preservation Methods 0.000 claims description 20
- 238000005336 cracking Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008642 heat stress Effects 0.000 abstract description 2
- 230000000977 initiatory effect Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005242 forging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/64—Treatment of workpieces or articles after build-up by thermal means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Plasma & Fusion (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a heat treatment method of an IN738 nickel-based alloy prepared by selective laser melting, which comprises the following steps: a. stress-relieving heat treatment; b. hot isostatic pressing; c. solution treatment; d. and (5) aging treatment. According to the heat treatment method for the IN738 nickel-base alloy prepared by adopting selective laser melting, the IN738 nickel-base alloy is subjected to stress relief heat treatment, hot isostatic pressing treatment, solution treatment and aging treatment IN sequence, and heat treatment parameters IN the whole heat treatment process are strictly controlled, so that the addition of accumulated heat stress and stress IN the phase change process is reduced, and finally the effect of reducing the residual stress on the surface of a workpiece is achieved, and therefore crack initiation, expansion and cracking of a component are restrained.
Description
Technical Field
The invention relates to a steel belt production process, IN particular to a heat treatment method of IN738 nickel base alloy which is widely used IN the battery industry and is prepared by adopting selective laser melting.
Background
The nickel-base alloy is one with high strength and certain oxidation corrosion resistance at 650-1000 deg.c. The alloy is further divided into nickel-based heat-resistant alloy, nickel-based corrosion-resistant alloy, nickel-based wear-resistant alloy, nickel-based precision alloy, nickel-based shape memory alloy and the like according to main performances.
The IN738 nickel-based alloy is a nickel-based alloy, and is widely applied to heat-corrosion-resistant parts of turbines IN aerospace and petrochemical industries due to the excellent creep resistance, oxidation resistance, corrosion resistance and other performances, so that the IN738 nickel-based alloy is an excellent corrosion-resistant alloy.
At present, the IN738 nickel-based alloy manufactured piece prepared by adopting the selective laser melting manufacturing technology is gradually applied to the aerospace field to prepare large-scale thin-wall complex structural parts, and compared with the traditional forging and precision casting processes, the IN738 nickel-based alloy manufactured piece can save a large amount of raw materials and shorten the processing period. However, the formation structure of the IN738 alloy manufactured by selective laser melting is different from the conventional forging and casting structure, and the thermal cracking and accumulated thermal stress formed IN the ultra-fast solidification process are liable to cause cracking of the IN718 nickel-based alloy manufactured IN the heat treatment process, so that the problem needs to be solved.
Disclosure of Invention
The invention aims to provide a heat treatment method of an IN738 nickel base alloy prepared by selective laser melting, which aims to solve the problems IN the prior art.
The invention aims at realizing the following technical scheme:
a heat treatment method of an IN738 nickel base alloy prepared by selective laser melting comprises the following steps:
a. stress relief heat treatment: heating the IN738 nickel-base alloy from room temperature to 500-700 ℃ at a heating rate of 10-30 ℃/min, preserving heat for 140-160 h, and cooling to room temperature at a cooling rate of 100-220 ℃/min after the heat preservation is finished;
b. hot isostatic pressing: heating the IN738 nickel base alloy subjected to stress-relief heat treatment from room temperature to 1180-1240 ℃ at a heating rate of 30-50 ℃/min, preserving heat and pressure for 1-3 h, and slowly cooling to room temperature along with a furnace after the heat preservation and pressure maintaining are finished;
c. solution treatment: heating the IN738 nickel base alloy subjected to the hot isostatic pressing treatment from room temperature to 1050-1200 ℃ at a heating rate of 30-50 ℃/min, preserving heat for 2-6 h, and cooling to room temperature at a cooling rate of 100-220 ℃/min after the heat preservation is finished;
d. aging treatment: heating the solution-treated IN738 nickel base alloy from room temperature to 650-900 ℃ at a heating rate of 15-25 ℃/min, preserving heat for 20-40 h, and cooling to room temperature at a cooling rate of 100-220 ℃/min after the heat preservation is finished.
In a preferred embodiment of the present invention, the temperature is raised to 600 ℃ at a heating rate of 20 ℃/min in the step a, and the temperature is kept for 150 hours, and after the temperature is kept, the temperature is cooled to room temperature at a cooling rate of 160 ℃/min.
In the step b, the temperature is raised to 1210 ℃ at a heating rate of 40 ℃/min, the heat and the pressure are maintained for 2 hours, and the furnace is slowly cooled to the room temperature after the heat and the pressure are finished.
As a preferable scheme of the invention, in the step c, the temperature is raised to 1125 ℃ at a heating rate of 40 ℃/min, the temperature is kept for 4 hours, and after the temperature is kept, the temperature is cooled to the room temperature at a cooling rate of 160 ℃/min.
As a preferable scheme of the invention, in the step d, the temperature is raised to 825 ℃ at a heating rate of 20 ℃/min, the temperature is kept for 30 hours, and after the temperature is kept, the temperature is cooled to room temperature at a cooling rate of 160 ℃/min.
The beneficial effects of the invention are as follows: according to the heat treatment method for the IN738 nickel-base alloy prepared by adopting selective laser melting, the IN738 nickel-base alloy is subjected to stress relief heat treatment, hot isostatic pressing treatment, solution treatment and aging treatment IN sequence, and heat treatment parameters IN the whole heat treatment process are strictly controlled, so that the addition of accumulated heat stress and stress IN the phase change process is reduced, and finally the effect of reducing the residual stress on the surface of a workpiece is achieved, and therefore crack initiation, expansion and cracking of a component are restrained.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It is to be understood that the embodiments described herein are merely illustrative of the invention and are not limiting thereof.
Example 1
IN this embodiment, a heat treatment method for an IN738 nickel base alloy prepared by selective laser melting includes the following steps:
a. stress relief heat treatment: heating the IN738 nickel-base alloy from room temperature to 500 ℃ at a heating rate of 10 ℃/min, preserving heat for 140h, and cooling to room temperature at a cooling rate of 100 ℃/min after the heat preservation is finished;
b. hot isostatic pressing: heating the IN738 nickel base alloy subjected to stress-relief heat treatment from room temperature to 1180 ℃ at a heating rate of 30 ℃/min, preserving heat and pressure for 1h, and slowly cooling to room temperature along with a furnace after the heat preservation and pressure maintaining are finished;
c. solution treatment: heating the IN738 nickel base alloy subjected to the hot isostatic pressing treatment from room temperature to 1050 ℃ at a heating rate of 30 ℃/min, preserving heat for 2 hours, and cooling to room temperature at a cooling rate of 100 ℃/min after the heat preservation is finished;
d. aging treatment: the solution-treated IN738 nickel base alloy is heated to 650 ℃ from room temperature at a heating rate of 15 ℃/min, and is preserved for 20 hours, and after the preservation is finished, the alloy is cooled to room temperature at a cooling rate of 100 ℃/min.
The cracking rate of the IN738 nickel-based alloy product treated by the heat treatment method is slightly reduced.
Example 2
IN this embodiment, a heat treatment method for an IN738 nickel base alloy prepared by selective laser melting includes the following steps:
a. stress relief heat treatment: heating the IN738 nickel-base alloy from room temperature to 700 ℃ at a heating rate of 30 ℃/min, preserving heat for 160 hours, and cooling to room temperature at a cooling rate of 220 ℃/min after the heat preservation is finished;
b. hot isostatic pressing: heating the IN738 nickel base alloy subjected to stress-relief heat treatment from room temperature to 1240 ℃ at a heating rate of 50 ℃/min, preserving heat and pressure for 3 hours, and slowly cooling to room temperature along with a furnace after the heat preservation and pressure maintaining are finished;
c. solution treatment: heating the IN738 nickel base alloy subjected to the hot isostatic pressing treatment from room temperature to 1200 ℃ at a heating rate of 50 ℃/min, preserving heat for 6 hours, and cooling to room temperature at a cooling rate of 220 ℃/min after the heat preservation is finished;
d. aging treatment: the solution-treated IN738 nickel base alloy is heated to 900 ℃ from room temperature at a heating rate of 25 ℃/min, and is preserved for 40 hours, and is cooled to room temperature at a cooling rate of 220 ℃/min after the heat preservation is finished.
The cracking rate of the IN738 nickel-based alloy product treated by the heat treatment method is slightly reduced.
Example 3
IN this embodiment, a heat treatment method for an IN738 nickel base alloy prepared by selective laser melting includes the following steps:
a. stress relief heat treatment: heating the IN738 nickel-base alloy from room temperature to 600 ℃ at a heating rate of 20 ℃/min, preserving the temperature for 150h, and cooling to room temperature at a cooling rate of 160 ℃/min after the heat preservation is finished;
b. hot isostatic pressing: heating the IN738 nickel base alloy subjected to stress-relief heat treatment from room temperature to 1210 ℃ at a heating rate of 40 ℃/min, preserving heat and pressure for 2 hours, and slowly cooling to room temperature along with a furnace after the heat preservation and pressure maintaining are finished;
c. solution treatment: heating the IN738 nickel base alloy subjected to the hot isostatic pressing treatment from room temperature to 1125 ℃ at a heating rate of 40 ℃/min, preserving heat for 4 hours, and cooling to room temperature at a cooling rate of 160 ℃/min after the heat preservation is finished;
d. aging treatment: the solution-treated IN738 nickel base alloy is heated to 825 ℃ from room temperature at a heating rate of 20 ℃/min, and is preserved for 30 hours, and is cooled to room temperature at a cooling rate of 160 ℃/min after the heat preservation is finished.
The cracking rate of the IN738 nickel-based alloy product treated by the heat treatment method is greatly reduced and is lower than 1%, which is the preferable scheme of the invention.
The above embodiments merely illustrate the basic principles and features of the present invention, and the present invention is not limited to the above embodiments, but can be variously changed and modified without departing from the spirit and scope of the present invention, which is within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims.
Claims (5)
1. A heat treatment method of an IN738 nickel base alloy prepared by selective laser melting is characterized by comprising the following steps: the method comprises the following steps:
a. stress relief heat treatment: heating the IN738 nickel-base alloy from room temperature to 500-700 ℃ at a heating rate of 10-30 ℃/min, preserving heat for 140-160 h, and cooling to room temperature at a cooling rate of 100-220 ℃/min after the heat preservation is finished;
b. hot isostatic pressing: heating the IN738 nickel base alloy subjected to stress-relief heat treatment from room temperature to 1180-1240 ℃ at a heating rate of 30-50 ℃/min, preserving heat and pressure for 1-3 h, and slowly cooling to room temperature along with a furnace after the heat preservation and pressure maintaining are finished;
c. solution treatment: heating the IN738 nickel base alloy subjected to the hot isostatic pressing treatment from room temperature to 1050-1200 ℃ at a heating rate of 30-50 ℃/min, preserving heat for 2-6 h, and cooling to room temperature at a cooling rate of 100-220 ℃/min after the heat preservation is finished;
d. aging treatment: heating the solution-treated IN738 nickel base alloy from room temperature to 650-900 ℃ at a heating rate of 15-25 ℃/min, preserving heat for 20-40 h, and cooling to room temperature at a cooling rate of 100-220 ℃/min after the heat preservation is finished.
2. The method for heat treating an IN738 nickel base alloy by selective laser melting according to claim 1, wherein the method comprises the steps of: in the step a, the temperature is raised to 600 ℃ at a heating rate of 20 ℃/min, the temperature is kept for 150h, and after the temperature is kept, the temperature is cooled to the room temperature at a cooling rate of 160 ℃/min.
3. The method for heat treating an IN738 nickel base alloy by selective laser melting according to claim 1, wherein the method comprises the steps of: in the step b, the temperature is raised to 1210 ℃ at a heating rate of 40 ℃/min, the heat and the pressure are maintained for 2 hours, and the furnace is slowly cooled to the room temperature after the heat and the pressure are finished.
4. The method for heat treating an IN738 nickel base alloy by selective laser melting according to claim 1, wherein the method comprises the steps of: in the step c, the temperature is raised to 1125 ℃ at a heating rate of 40 ℃/min, the temperature is kept for 4 hours, and after the temperature is kept, the temperature is cooled to the room temperature at a cooling rate of 160 ℃/min.
5. The method for heat treating an IN738 nickel base alloy by selective laser melting according to claim 1, wherein the method comprises the steps of: in the step d, the temperature is raised to 825 ℃ at a heating rate of 20 ℃/min, the temperature is kept for 30h, and the temperature is cooled to the room temperature at a cooling rate of 160 ℃/min after the temperature is kept.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211717353.4A CN117840458A (en) | 2022-12-29 | 2022-12-29 | Heat treatment method of IN738 nickel-based alloy prepared by selective laser melting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211717353.4A CN117840458A (en) | 2022-12-29 | 2022-12-29 | Heat treatment method of IN738 nickel-based alloy prepared by selective laser melting |
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| CN117840458A true CN117840458A (en) | 2024-04-09 |
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|---|---|---|---|---|
| CN103088275A (en) * | 2011-10-31 | 2013-05-08 | 阿尔斯通技术有限公司 | Method for producing a superalloy component or fitting |
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| US20170095858A1 (en) * | 2015-10-05 | 2017-04-06 | Ansaldo Energia Ip Uk Limited | Method for treatment of metallic powder for selective laser melting |
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| CN111360266A (en) * | 2020-03-25 | 2020-07-03 | 华南理工大学 | Selective laser melting forming Inconel718 alloy and heat treatment method thereof |
| CN113477942A (en) * | 2021-07-01 | 2021-10-08 | 西南交通大学 | SLM-based preparation method of high-strength high-plasticity Inconel718 alloy |
| CN113789490A (en) * | 2021-08-26 | 2021-12-14 | 飞而康快速制造科技有限责任公司 | GH4169 nickel-based high-temperature alloy for additive manufacturing and heat treatment method thereof |
| CN114247899A (en) * | 2021-12-13 | 2022-03-29 | 金川集团股份有限公司 | Heat treatment method of SLM forming Inconel738 alloy without generating cracks |
| CN115198143A (en) * | 2021-04-08 | 2022-10-18 | 中国航发商用航空发动机有限责任公司 | Nickel-based alloy and preparation method and application thereof |
| CN115319113A (en) * | 2022-08-12 | 2022-11-11 | 中国航发北京航空材料研究院 | Laser selective melting manufacturing method for aeroengine cyclone casing |
-
2022
- 2022-12-29 CN CN202211717353.4A patent/CN117840458A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088275A (en) * | 2011-10-31 | 2013-05-08 | 阿尔斯通技术有限公司 | Method for producing a superalloy component or fitting |
| CN103084573A (en) * | 2011-11-04 | 2013-05-08 | 阿尔斯通技术有限公司 | Process for production of articles made of gamma-prime precipitation-strengthened nickel-base superalloy by selective laser melting (SLM) |
| US20170095858A1 (en) * | 2015-10-05 | 2017-04-06 | Ansaldo Energia Ip Uk Limited | Method for treatment of metallic powder for selective laser melting |
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