CN103590002A - Preparation method for Al-Cr coating on nickel-based superalloy - Google Patents
Preparation method for Al-Cr coating on nickel-based superalloy Download PDFInfo
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- CN103590002A CN103590002A CN201210295487.1A CN201210295487A CN103590002A CN 103590002 A CN103590002 A CN 103590002A CN 201210295487 A CN201210295487 A CN 201210295487A CN 103590002 A CN103590002 A CN 103590002A
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Abstract
The invention discloses a preparation method for an Al-Cr coating on a nickel-based superalloy, which belongs to the technical field of high temperature protection coatings. The method comprises the following steps: pretreating a superalloy matrix; depositing a Cr layer on the surface of the cleaned superalloy by using arc ion plating; and finally, carrying out alumetizing through powder embedding so as to obtain the Al-Cr coating on the superalloy. The preparation method for the Al-Cr coating on the nickel-based superalloy has the advantages of good process repeatability, easy realization of industrial production and the like; the prepared coating has a compact structure, high bonding strength on the matrix and controllable components, the storage phase of Al and the content of Cr in the coating are effectively increased, so antioxidation and anti-thermal etching performance of the raising are improved, and the service life of the coating is effectively prolonged. The coating prepared by the preparation method is applicable to protection of the nickel-based superalloy.
Description
Technical field
The present invention relates to high-temperature protection coating technology, be specifically related to a kind of preparation method of nickel base superalloy Al-Cr coating.
Background technology
In fields such as modern energy industry and aerospace, superalloy is indispensable integral part.The hot-end component of aircraft engine and gas turbine engine particularly turbine part is worked under high temperature, high speed and complex stress, not only require to have good hot strength, higher creep durability energy, fatigue property and excellent structure stability, also require body material to have higher resistance to high temperature oxidation and hot corrosion resistance.In order to make superalloy take into account good mechanical property and high temperature oxidation resistance, a very effective approach is to apply suitable coating at high-temperature alloy surface.
From the 1950's, high-temperature protection coating technology is developed rapidly, especially being most widely used with aluminide coating.The document of related application is as 1. Chinese invention patent, for the aluminide coating of the enrichment yttrium of ultrahigh temperature alloy, application number 89109243.9; 2. Chinese invention patent, a kind of pack aluminizing agent and pack cementation aluminizing method, application number 03114750.X; 3. Chinese invention patent, a kind of preparation method of nano platinum oxidation coating for high temperature alloy, application number 200810058933.0; 4. Chinese invention patent, the preparation method of iridium-aluminum high temperature oxidation resistance coating, application number 200910168837.6 etc.
Aluminide coating belongs to diffusion coating, be characterized in thering is good antioxidant property, but because NiAl phase coating fragility is large, easy to crack, peel off, hot corrosion resistance is poor, therefore need to improve aluminide coating.
Summary of the invention
For above-mentioned defect of the prior art, the object of the present invention is to provide a kind of good process repeatability that has, easily realize the preparation method of the nickel base superalloy Al-Cr coating of suitability for industrialized production, the method well improves the anti-oxidant and hot corrosion resistance of coating by add Cr element in coating, and effectively extends coating work-ing life.
To achieve these goals, technical scheme of the present invention is:
A kind of preparation method of nickel base superalloy Al-Cr coating, the method is on nickel base superalloy body material, by arc ion plating (AIP, be Arc Ion Plating) method deposition Cr layer, then adopt powder entrapping method to ooze Al, penetration enhancer is by ferroaluminium powder (Al content is 48～52wt%, and powder size is 100～300 orders) and NH
4cl forms, thereby on superalloy matrix, forms Al-Cr coating.
While adopting arc ion plating (aip) deposition Cr layer, first vacuum chamber vacuum is evacuated to 2 * 10 in advance
-3~ 1 * 10
- 2pa, passes into Ar gas, makes pressure in vacuum tank rise to 5 * 10
-2～3 * 10
-1pa; Then sample is carried out to pre-sputtering Bombardment and cleaning, target-substrate distance is 230～250mm, and pulsed bias is-800～-1000V, dutycycle 20～40%, time 2～5min; Deposit Cr layer, target-substrate distance is 230～250mm again, arc voltage 15～25V, and arc current 50～70A, pulsed bias is-150～-300V, dutycycle 20～40%, 50～150 ℃ of depositing temperatures, depositing time 40～80min, Cr layer thickness is 5～10 μ m.
While adopting powder entrapping method to ooze Al the nickel base superalloy of above-mentioned deposition Cr layer, first penetration enhancer is carried out to drying and processing, the composition of penetration enhancer is 95～98wt% ferroaluminium powder and 2～5wt%NH
4cl, is evenly placed on vacuum by penetration enhancer and oozes in the platter of Al stove, is evacuated to 8.0 * 10
-2～9.6 * 10
-2mPa, Heating temperature is 900～1000 ℃, soaking time is 4～5h, then closes heating power supply, cools to room temperature with the furnace; Then carry out pack cementation Al, sample is imbedded in penetration enhancer, vacuum is oozed to Al stove evacuation to 8.0 * 10
-2～9.6 * 10
-2mPa, is heated to be 900～1000 ℃, and soaking time is 2～3h, then closes heating power supply, cools to room temperature with the furnace, obtains Al-Cr coating.
Before deposition Cr layer, need sample to carry out pre-treatment, first with SiC silicon carbide paper, body material is polished step by step to 800～1200#, with 60～220 order hollow glass ball wet abrasive blastings, process again, then adopt successively after deionized water, acetone ultrasonic cleaning 15min, then use dehydrated alcohol rinsing post-drying.
Advantage of the present invention and beneficial effect are as follows:
1, the prepared coating longer service life of the inventive method.Main phase in superalloy Al-Cr coating is β-NiAl and α-Cr phase, β in high-temperature oxidation process-NiAl can provide Al source to support generation and the reparation of surface layer oxide film mutually, in During Process of Hot Corrosion, in coating, Cr element can be resisted corrosion, therefore there is good anti-oxidant and hot corrosion resistance, thereby extend the work-ing life of coating.
2, the prepared coating of the inventive method has the structure of even compact and good bonding strength, can be applicable to the protection of nickel base superalloy.
3, the present invention adopts electric arc ion-plating deposition Cr layer and powder entrapping method to ooze the method that Al obtains superalloy Al-Cr coating, and its technique is simple, reproducible, and can effectively control coated component and thickness.
Accompanying drawing explanation
Fig. 1 is the cross section BSE pattern of Al-Cr coating on DSM11 superalloy in the embodiment of the present invention 1.
Fig. 2 is the XRD diffracting spectrum of Al-Ct coating on DSM11 superalloy in the embodiment of the present invention 1.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Embodiment 1
Base material adopts Ni based high-temperature alloy DSM 11, and its nominal composition is (mass percent): 3% Al, and 5%Ti, 14%Cr, 9.5%Co, 3.8%W, 1.5%Mo, 2.8%Ta, 0.1%C, Ni surplus, specimen size is Ф 15mm * 2mm.Adopt domestic MIP-8-800 type arc ion plating apparatus deposition Cr layer.Before deposition Cr layer, need sample to carry out pre-treatment, to body material be polished step by step to 800# with SiC silicon carbide paper, and adopt 200 order hollow glass ball wet abrasive blastings to process, first use immediately deionized water, with each ultrasonic cleaning of acetone 15min, standby by dehydrated alcohol rinsing post-drying again.While adopting arc ion plating (aip) deposition Cr layer, vacuum chamber vacuum is evacuated to 6 * 10 in advance
-3pa, passes into Ar gas, makes pressure in vacuum tank rise to 2 * 10
-1pa; Sample is carried out to pre-sputtering Bombardment and cleaning, and target-substrate distance is 240 ㎜, and pulsed bias is-800V, dutycycle 30%, scavenging period 5min; During deposition Cr layer, target-substrate distance is 240 ㎜, arc voltage 19V, and arc current 60A, pulsed bias is-200V, dutycycle 30%, 120 ℃ of depositing temperatures, depositing time 45min, Ar layer thickness is about 5 μ m.
The sample of the deposition Ar layer obtaining is carried out to powder pack cementation Al.While adopting powder entrapping method to ooze Al, first penetration enhancer is carried out to drying and processing, the composition of penetration enhancer is 95wt% ferroaluminium powder (Al content is 50wt%, and powder size is 200 orders) and 5wt%NH
4cl, is evenly placed on vacuum by penetration enhancer and oozes in the platter of Al stove, is evacuated to 9.6 * 10
-2mPa, Heating temperature is 950 ℃, soaking time is 4h, then closes heating power supply, cools to room temperature with the furnace; Then carry out pack cementation Al, sample is imbedded in penetration enhancer, vacuum is oozed to Al stove evacuation to 9.6 * 10
-2mPa, is heated to be 950 ℃, and soaking time is 2h, then closes heating power supply, cools to room temperature with the furnace, obtains Al-Cr coating.
The Cross Section Morphology of Al-Cr coating as shown in Figure 1.As shown in Figure 1, Al-Cr coating texture is fine and close, is combined well with matrix, and coat-thickness is about 25 μ m, and wherein diffusion zone is about 5 μ m.In Al-Cr coating, Al content is about 32wt%, and Cr content is about 13wt%, and Ti content is about 2.5wt%, and Co content is about 6.5wt%, and W content is about 2wt%, and Ni is surplus.In diffusion zone, Al content is about 16wt%, and Cr content is about 19wt%, and Ti content is about 7.5wt%, and Co content is about 9wt%, and W content is about 7.5wt%, and Ta content is about 3.5wt%, and Ni is surplus.
The XRD figure spectrum of Al-Cr coating as shown in Figure 2.As shown in Figure 2, Al-Cr coating is by β-NiAl, Ni
2al
3, α-Cr and AlCr
2phase composite.Prepared sample is carried out to constant temperature oxidation test, and prepared Al-Cr coating is at 1000 ℃/300h constant temperature oxidation weight gain rate < 3 * 10
-3mg/cm
2h.
Nickel base superalloy is the highest, the most widely used class alloy of hot strength in superalloy.Thereby the protective coating of research nickel base superalloy, be with a wide range of applications.The preparation method of nickel base superalloy Al-Cr coating in the present embodiment, to other nickel base superalloys, as GH4037, K438, K438G, K417G, K444, DZ404, DD26, DD406 etc. have good versatility, this coating production can effectively extend the work-ing life of coating.
Above-described embodiment result shows, the present invention adds the technique of powder pack cementation Al by arc ion plating Cr, prepare Al-Cr coating on superalloy matrix.This preparation technology of coating has good process repeatability and easily realizes the advantages such as suitability for industrialized production, coating and the body material bonding strength of preparation are high, weave construction is fine and close, composition can be controlled, the Al effectively raising in coating stores mutually and the content of Cr, thereby can improve coating resistance to high temperature oxidation and hot corrosion resistance, reach and extend the coating effect in work-ing life.This coating production can be applicable to the protection of nickel base superalloy.
Claims (7)
1. a preparation method for nickel base superalloy Al-Cr coating, is characterized in that: the method is on nickel base superalloy body material, and the method deposition Cr layer by arc ion plating, then adopts powder entrapping method to ooze Al, and penetration enhancer is by ferroaluminium powder and NH
4cl forms, thereby on superalloy matrix, forms Al-Cr coating.
2. the preparation method of nickel base superalloy Al-Cr coating according to claim 1, is characterized in that: while adopting arc ion plating (aip) deposition Cr layer, first vacuum chamber vacuum is evacuated to 2 * 10 in advance
-3～1 * 10
-2pa, passes into Ar gas, makes pressure in vacuum tank rise to 5 * 10
-2～3 * 10
-1pa; Then sample is carried out to pre-sputtering Bombardment and cleaning, target-substrate distance is 230～250mm, and pulsed bias is-800～-1000V, dutycycle 20～40%, time 2～5min; Deposit Cr layer, target-substrate distance is 230～250mm again, arc voltage 15～25V, and arc current 50～70A, pulsed bias is-150～-300V, dutycycle 20～40%, 50～150 ℃ of depositing temperatures, depositing time 40～80min, Cr layer thickness is 5～10 μ m.
3. the preparation method of nickel base superalloy Al-Cr coating according to claim 1, it is characterized in that: while adopting powder entrapping method to ooze Al, first penetration enhancer is carried out to drying and processing, then carry out pack cementation Al, pack cementation Al imbeds sample in penetration enhancer, and vacuum is oozed to Al stove evacuation to 8.0 * 10
-2～9.6 * 10
-2mPa, is heated to be 900～1000 ℃, and soaking time is 2～3h, then closes heating power supply, cools to room temperature with the furnace, obtains Al-Cr coating.
4. according to the preparation method of nickel base superalloy Al-Cr coating described in claim 1 or 3, it is characterized in that: by mass percentage, in described penetration enhancer, ferroaluminium powder is 95～98%, NH
4cl is 2～5%.
5. the preparation method of nickel base superalloy Al-Cr coating according to claim 3, is characterized in that: described drying and processing is penetration enhancer to be evenly placed on to vacuum ooze in the platter of Al stove, is evacuated to 8.0 * 10
-2～9.6 * 10
-2mPa, Heating temperature is 900～1000 ℃, soaking time is 4～5h, then closes heating power supply, cools to room temperature with the furnace.
6. the preparation method of nickel base superalloy Al-Cr coating according to claim 1, it is characterized in that: before deposition Cr layer, body material is carried out to pre-treatment: first with SiC silicon carbide paper, body material is polished step by step to 800～1200#, with 60～220 order hollow glass ball wet abrasive blastings, process again, then adopt successively after deionized water, acetone ultrasonic cleaning 15min, then use dehydrated alcohol rinsing post-drying.
7. the preparation method of nickel base superalloy Al-Cr coating according to claim 1, is characterized in that: in described ferroaluminium powder, the mass content of Al is 48～52%, and powder size is 100～300 orders.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233184A (en) * | 2014-08-26 | 2014-12-24 | 盐城市鑫洋电热材料有限公司 | Preparation method of nickel-chromium electrothermal alloy with aluminized surface |
| CN104313541A (en) * | 2014-09-25 | 2015-01-28 | 西北工业大学 | Method for preparing antioxidant Zr-Y modified silicide infiltrated layer on Nb-based superhigh-temperature alloy surface by two-step method |
| CN105177512A (en) * | 2015-08-05 | 2015-12-23 | 南京航空航天大学 | Method for preparing Fe-Al-Cr alloy layer through multi-arc ion aluminum plating, arc-added glow discharge chromizing and recoil ion implantation |
| CN108118286A (en) * | 2016-11-29 | 2018-06-05 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of means of defence of GH4708 nickel base superalloys high temperature resistance wear-resistant coating |
| CN108315690A (en) * | 2018-04-19 | 2018-07-24 | 宁波沈鑫电子有限公司 | A kind of resistance to corrosion in hand sweat treatment process of super thin metal product sand blasted surface |
| CN109385598A (en) * | 2017-08-07 | 2019-02-26 | 江苏大学 | A kind of nickel base superalloy neutral salt bath chromaluminizing medium and its technique |
| CN109943813A (en) * | 2019-04-28 | 2019-06-28 | 北京航空航天大学 | A kind of high-throughput preparation method of Al-Cr metal composite coating |
| CN112125705A (en) * | 2020-09-10 | 2020-12-25 | 中国科学院宁波材料技术与工程研究所 | Protective coating of SiC ceramic and preparation method thereof |
| CN114686804A (en) * | 2022-01-17 | 2022-07-01 | 西南大学 | Composite coating of oxide dispersion reinforced steel and preparation method thereof |
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Cited By (15)
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| CN104233184A (en) * | 2014-08-26 | 2014-12-24 | 盐城市鑫洋电热材料有限公司 | Preparation method of nickel-chromium electrothermal alloy with aluminized surface |
| CN104313541A (en) * | 2014-09-25 | 2015-01-28 | 西北工业大学 | Method for preparing antioxidant Zr-Y modified silicide infiltrated layer on Nb-based superhigh-temperature alloy surface by two-step method |
| CN104313541B (en) * | 2014-09-25 | 2016-08-24 | 西北工业大学 | Two-step method is used to prepare the preparation method of anti-oxidant Zr-Y modified silicide infiltration layer at Nb based ultra-high temperature alloy surface |
| CN105177512A (en) * | 2015-08-05 | 2015-12-23 | 南京航空航天大学 | Method for preparing Fe-Al-Cr alloy layer through multi-arc ion aluminum plating, arc-added glow discharge chromizing and recoil ion implantation |
| CN105177512B (en) * | 2015-08-05 | 2017-09-26 | 南京航空航天大学 | Multi-arc ion coating aluminium+arc-added glow chromising+recoil ion injection prepares Fe Al Cr alloy-layers |
| CN108118286B (en) * | 2016-11-29 | 2019-09-06 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of means of defence of GH4708 nickel base superalloy wear-resistant coating resistant to high temperatures |
| CN108118286A (en) * | 2016-11-29 | 2018-06-05 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of means of defence of GH4708 nickel base superalloys high temperature resistance wear-resistant coating |
| CN109385598A (en) * | 2017-08-07 | 2019-02-26 | 江苏大学 | A kind of nickel base superalloy neutral salt bath chromaluminizing medium and its technique |
| CN108315690A (en) * | 2018-04-19 | 2018-07-24 | 宁波沈鑫电子有限公司 | A kind of resistance to corrosion in hand sweat treatment process of super thin metal product sand blasted surface |
| CN108315690B (en) * | 2018-04-19 | 2020-01-14 | 宁波沈鑫电子有限公司 | Hand sweat corrosion resistant treatment process for sand-blasting surface of ultrathin metal product |
| CN109943813A (en) * | 2019-04-28 | 2019-06-28 | 北京航空航天大学 | A kind of high-throughput preparation method of Al-Cr metal composite coating |
| CN109943813B (en) * | 2019-04-28 | 2023-03-14 | 北京航空航天大学 | High-flux preparation method of Al-Cr metal composite coating |
| CN112125705A (en) * | 2020-09-10 | 2020-12-25 | 中国科学院宁波材料技术与工程研究所 | Protective coating of SiC ceramic and preparation method thereof |
| CN114686804A (en) * | 2022-01-17 | 2022-07-01 | 西南大学 | Composite coating of oxide dispersion reinforced steel and preparation method thereof |
| CN114686804B (en) * | 2022-01-17 | 2023-11-10 | 西南大学 | Composite coating of oxide dispersion reinforced steel and preparation method thereof |
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Application publication date: 20140219 |