CN106435431A - Preparation method of high-temperature oxidation resistant TiAl3-Al composite coating on surface of titanium alloy - Google Patents
Preparation method of high-temperature oxidation resistant TiAl3-Al composite coating on surface of titanium alloy Download PDFInfo
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- CN106435431A CN106435431A CN201611014968.5A CN201611014968A CN106435431A CN 106435431 A CN106435431 A CN 106435431A CN 201611014968 A CN201611014968 A CN 201611014968A CN 106435431 A CN106435431 A CN 106435431A
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- Prior art keywords
- titanium alloy
- matrix
- pure
- composite coating
- preparation
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
Abstract
The invention relates to the technical field of material research and application, particularly to a preparation method of a high-temperature oxidation resistant TiAl3-Al composite coating on the surface of a titanium alloy. The preparation method of the high-temperature oxidation resistant TiAl3-Al composite coating on the surface of the titanium alloy comprises the steps of spraying gas atomization powder, namely, pure Al powder; adopting a TC4 titanium alloy as a matrix, chamfering the two ends of the matrix, carrying out ultrasonic cleaning, sand blasting roughening, surface purging and spraying on the matrix, and preparing a pure Al layer; and putting a sample with the pure Al coating into a tube furnace to be subjected to vacuum thermal diffusion treatment, and after keeping the temperature of 610 DEG C for 8 h, carrying out furnace cooling to the room temperature, so as to obtain the TiAl3-Al composite coating. According to the preparation method, a pure Al coating prepared through low-temperature supersonic speed flame spraying is relatively compact in structure but has a small amount of micro cracks and air holes; after thermal diffusion treatment, TiAl3-Al phases are generated between the pure Al layer and the TC4 titanium alloy matrix, and a small amount of air holes exist in an interface between a TiAl3 layer and the pure Al layer; and the composite coating enters the steady oxidization stage after 5 hours of static oxidation at the temperature of 700 DEG C.
Description
Technical field
The present invention relates to investigation of materials and applied technical field, and in particular to a kind of alloy surface resistance to high temperature oxidation TiAl3-
The preparation method of Al composite coating.
Background technology
Titanium alloy is little because having density, specific strength, specific stiffness height, decay resistance, mechanical behavior under high temperature, resisting fatigue and compacted
The features such as change performance is good, is widely used, particularly in aeroplane engine in the fields such as petrochemical industry, ocean development, Aero-Space
In machine.At present, abroad in advanced aero engine, high-temperature titanium alloy consumption has accounted for 1/3 of its gross mass or so, but is limited by
Using temperature, titanium alloy is only used for front end fan blade and what compressor blade front manufactured, then what compressor blade
And the high-temperature component such as the turbine disk must be manufactured using high temperature alloy.
Research shows, is difficult to obtain using solution strengthening method while meeting using more than 600 DEG C of temperature and to compacted merely
Become the titanium alloy of drag and intensity requirement, the Ti-Al system metal of order-hardening have high specific strength, specific stiffness, high creep resistance,
Excellent antioxidation and fire resistance, have become the candidate material of the high-temperature titanium alloy using more than 600 DEG C of temperature.
Ti-Al system metal is still within the laboratory development stage at present, and the method for improving titanium alloy antioxygenic property is more,
Mainly there are interpolation alloying element method, pre-oxidation treatment method, face coat method etc., wherein face coat includes diffusion coating and cladding
Coating, coating is most commonly seen high-temperature protection coating.TiAl3Belong to Ti-Al series intermetallic compound, the atom of its Al
Fraction is up to 75%, with excellent high temperature oxidation resistance.Prepare TiAl3The common method of coating has cladding aluminising, magnetic control to splash
Penetrate, cold spraying etc..Using cladding process prepares coating, in cooling procedure, coating is easily made to produce penetrating crack;And adopt magnetic control
Sputtering method prepares coating, its low production efficiency and relatively costly;Although cold spraying is suitable for spraying to heat sensitive powder and matrix,
But which is higher to equipment requirements, special supercharging equipment is needed, limits its application in engineering to a certain extent.
Content of the invention
It is contemplated that the problems referred to above are directed to, a kind of titanium alloy surface resistance to high temperature oxidation TiAl is proposed3- Al composite coating
Preparation method.
Technical program of the present invention lies in：
Titanium alloy surface resistance to high temperature oxidation TiAl3The preparation method of-Al composite coating, comprises the steps：
（1）Spraying gas-atomised powders are pure Al powder：Powder average particle size is 48.8 microns, before spraying, gas-atomised powders is put into baking
6h is incubated at 50 DEG C in case, so that the absorption water in powder is removed, then sprays；
（2）TC with diameter 4.5mm × 50mm4Titanium alloy is matrix, and matrix two ends carry out chamfering, clear to matrix ultrasound with ethanol
Washing, sandblasting roughening is then carried out to matrix, then by gases at high pressure, sand blasted surface is purged to remove the remaining gravel on surface；
（3）The product for obtaining in step 2 is sprayed, and about 300 microns of thickness is prepared on matrix
Pure Al layer, the sample of pure for band Al coating is put in tube furnace, flowing high-purity Ar gas protective atmosphere in carry out
Vacuum heat diffusion treatment, cools to room temperature with the furnace after being incubated 8h, so as to obtain TiAl at 610 DEG C3- Al composite coating.
（4）By the product TiAl for obtaining in step 33- Al is in 700 DEG C of static oxidation 5h.
Wherein, the radian of the chamfering is R=2.25mm.
The sandblasting roughening carries out sandblasting roughening using No. 120 emergies, at 0.2 mpa to matrix.
Spraying in the step 3 adopts low temperature supersonic flame.
The method have technical effect that：
Using low temperature supersonic flame method in TC4Pure Al layer is sprayed on titanium alloy substrate, is then carried out at inert atmosphere Vacuum Heat
Reason, is prepared for TiAl3- Al composite coating, pure Al coating structure prepared by Low Temperature High Oxygen-Air Fuel Spray is comparatively dense, but exists
A small amount of micro-crack and pore;After heat diffusion treatment, pure Al layer and TC4TiAl is generated between titanium alloy substrate3- Al phase,
TiAl3Between layer and pure Al layer there is a small amount of hole in interface.Composite coating enters stable state oxygen after 700 DEG C of static oxidation 5h
The change stage.
Specific embodiment
Titanium alloy surface resistance to high temperature oxidation TiAl3The preparation method of-Al composite coating, comprises the steps：
（1）Spraying gas-atomised powders are pure Al powder：Powder average particle size is 48.8 microns, before spraying, gas-atomised powders is put into baking
6h is incubated at 50 DEG C in case, so that the absorption water in powder is removed, then sprays；
（2）TC with diameter 4.5mm × 50mm4Titanium alloy is matrix, and matrix two ends carry out chamfering, and the radian of chamfering is R=
2.25mm, is cleaned by ultrasonic to matrix with ethanol, then to matrix using No. 120 emergies, spray to matrix at 0.2 mpa
Coarsening, then by gases at high pressure, sand blasted surface is purged to remove the remaining gravel on surface；
（3）The product for obtaining in step 2 is sprayed using low temperature supersonic flame, thickness about 300 is prepared on matrix micro-
The pure Al layer of rice, the sample of pure for band Al coating is put in tube furnace, is carried out true in the protective atmosphere of the high-purity Ar gas of flowing
Empty heat diffusion treatment, cools to room temperature with the furnace after being incubated 8h, so as to obtain TiAl at 610 DEG C3- Al composite coating.
（4）By the product TiAl for obtaining in step 33- Al is in 700 DEG C of static oxidation 5h.
Claims (5)
1. titanium alloy surface resistance to high temperature oxidation TiAl3The preparation method of-Al composite coating, it is characterised in that：Comprise the steps：
（1）Spraying gas-atomised powders are pure Al powder：Powder average particle size is 48.8 microns, before spraying, gas-atomised powders is put into baking
6 h are incubated in case at 50 DEG C, to remove the absorption water in powder, are then sprayed；
（2）TC with 4.5 mm × 50 mm of diameter4Titanium alloy is matrix, and matrix two ends carry out chamfering, with ethanol to matrix ultrasound
Cleaning, is then carried out sandblasting roughening, then by gases at high pressure, sand blasted surface is purged to remove the remaining gravel on surface to matrix；
（3）The product for obtaining in step 2 is sprayed, and the pure Al layer of about 300 microns of thickness is prepared on matrix, will carry pure Al
The sample of coating is put in tube furnace, carries out vacuum heat diffusion treatment, at 610 DEG C in the protective atmosphere of the high-purity Ar gas of flowing
Room temperature is cooled to the furnace after lower insulation 8h, so as to obtain TiAl3- Al composite coating.
2.（4）By the product TiAl for obtaining in step 33- Al is in 700 DEG C of 5 h of static oxidation.
3. titanium alloy surface resistance to high temperature oxidation TiAl according to claim 13The preparation method of-Al composite coating, its feature
It is：The radian of the chamfering is R=2.25 mm.
4. titanium alloy surface resistance to high temperature oxidation TiAl according to claim 13The preparation method of-Al composite coating, its feature
It is：The sandblasting is roughened using No. 120 emergies, carries out sandblasting roughening to matrix under 0.2 MPa.
5. titanium alloy surface resistance to high temperature oxidation TiAl according to claim 13The preparation method of-Al composite coating, its feature
It is：Spraying in the step 3 adopts low temperature supersonic flame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611014968.5A CN106435431A (en) | 2016-11-18 | 2016-11-18 | Preparation method of high-temperature oxidation resistant TiAl3-Al composite coating on surface of titanium alloy |
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| CN201611014968.5A CN106435431A (en) | 2016-11-18 | 2016-11-18 | Preparation method of high-temperature oxidation resistant TiAl3-Al composite coating on surface of titanium alloy |
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| CN201611014968.5A Pending CN106435431A (en) | 2016-11-18 | 2016-11-18 | Preparation method of high-temperature oxidation resistant TiAl3-Al composite coating on surface of titanium alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504977A (en) * | 2018-04-28 | 2018-09-07 | 江西科技师范大学 | A kind of preparation method of titanium alloy high temperature coatings |
| CN110684972A (en) * | 2019-11-11 | 2020-01-14 | 中国船舶重工集团公司第七二五研究所 | Preparation method of titanium alloy wear-resistant insulating coating |
| CN114150313A (en) * | 2021-11-23 | 2022-03-08 | 西安文理学院 | TiAl alloy high-temperature oxidation-resistant nano thermal barrier coating and preparation method thereof |
-
2016
- 2016-11-18 CN CN201611014968.5A patent/CN106435431A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504977A (en) * | 2018-04-28 | 2018-09-07 | 江西科技师范大学 | A kind of preparation method of titanium alloy high temperature coatings |
| CN110684972A (en) * | 2019-11-11 | 2020-01-14 | 中国船舶重工集团公司第七二五研究所 | Preparation method of titanium alloy wear-resistant insulating coating |
| CN114150313A (en) * | 2021-11-23 | 2022-03-08 | 西安文理学院 | TiAl alloy high-temperature oxidation-resistant nano thermal barrier coating and preparation method thereof |
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Application publication date: 20170222 |