CN110144539A - A kind of preparation method of the anti-cavitation pitting coating of wet cylinder liner outer wall - Google Patents

A kind of preparation method of the anti-cavitation pitting coating of wet cylinder liner outer wall Download PDF

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Publication number
CN110144539A
CN110144539A CN201910421666.7A CN201910421666A CN110144539A CN 110144539 A CN110144539 A CN 110144539A CN 201910421666 A CN201910421666 A CN 201910421666A CN 110144539 A CN110144539 A CN 110144539A
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coating
wet
powder
niti
base composite
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CN110144539B (en
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魏新龙
朱德佳
朱无言
吴多利
张超
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Yangzhou University
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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
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention belongs to cylinder sleeve manufacturing field, the preparation method of especially a kind of anti-cavitation pitting coating of wet cylinder liner outer wall.Include the following steps: to weigh NiTi powder and NiCr-Cr according to certain mass ratio3C2Powder, is carried out ball milling mixing, and sieving obtains composite powder；To wet liner outer wall roughening treatment；It by the way of plasma spraying, is sprayed in wet cylinder liner outer wall, obtains spraying state NiTi base composite coating；Wet blasting spray gun is directed at spraying state coating area, by the mixture of compressed air-driven water and ceramic pellet, reaches injection extremely spraying state coating surface after high speed；Workpiece surface is cleaned and dried after wet blasting processing, obtains fine and close NiTi base composite coating；Turnery processing is carried out to fine and close NiTi base composite coating.The present invention carries out intensive treatment to spraying state coating using wet shot blasting method, effectively reduces the porosity of coating, solves the problems, such as that air plasma spraying coating resistance to pitcorrosion can decline.

Description

A kind of preparation method of the anti-cavitation pitting coating of wet cylinder liner outer wall
Technical field
The invention belongs to diesel cylinder sleeve manufacturing technology field, the system of especially a kind of anti-cavitation pitting coating of wet cylinder liner outer wall Preparation Method.
Background technique
With the development of large diesel engine, wet cylinder liner using more and more.The wet cylinder liner of cooling water and diesel engine Outer wall contact causes burning chamber air-tightness decline it is easier that cylinder sleeve generation cavitation pitting destruction, and oil temperature and oil consumption increase, greasy property Decline, combustion engine powered property economy degradation seriously affect the service life of internal combustion engine, or even cause major accident, As a problem urgently to be resolved in cylinder sleeve design, manufacture, operation and maintenance work.
Atmospheric plasma spraying technology is a kind of important coat preparing technology, is by high-intensitive direct-current arc or high frequency The plasma that the modes such as inductively coupled discharge and pulsed discharge, alternating current arc, shock wave electric discharge, exploding wires generate.It is by Powder, which is sent into plasma arc flame stream, is heated to fusing or semi-molten state, may make metal powder and ceramic powders melt to fill Point, required ceramal coating is then prepared by rapid cooling by high-velocity spray to matrix surface.
Cylinder liner cavitation performance methodology is improved at present and mainly increases additive in oriented cooling water, and cylinder sleeve structure is improved or benefit Cavitation pitting performance is improved with surface engineering technology prepares coating.CN86107144 is related to a kind of anti-cave of engine cycle cooling water Erosion, electrochemically resistant corrosion, cuts down the multifunction additive of scale.CN101057070 has invented a kind of diesel oil with surface texture Machine wet liner, to prevent corrosiveness caused by cavitation.The texture on the cylinder sleeve surface is formed as manganese phosphate painting Layer, in coolant liquid natural adhesion strength and surface tension one work, liner backs generate stagnant fluid layer, can make When obtaining air pocket bubbles burst, kinetic energy is exhausted in stagnant fluid layer, is not applied to liner backs.CN104481718A is disclosed A kind of anti-cavitation pitting cylinder jacket of wet type, it is recessed to be machined with axially extending water cavity for equal radians interval on the outer circumference surface of the liner body Slot is formed with the enhancing convex ribs that can enhance liner body rigidity, water cavity groove and engine cylinder body between two adjacent water cavity grooves The longitudinal cooling water cavity for foring the even cloth of multiple tracks on liner body outer peripheral surface is matched, the rigid of liner body is considerably increased Degree, deforms cylinder jacket in piston lateral impact small, with small vibration, thus efficiency prevent the cavitation pitting of cylinder jacket, extend cylinder The service life of set.CN107130202A discloses a kind of preparation method of the ceramic base composite coating of cavitation, and this method is first First using air plasma spraying equipment successively spray metal transition zone and ceramic coating on metal base, resin is then utilized Sealing pores are carried out to spraying state ceramic coating surface.
Above method can improve the resistance to pitcorrosion energy of cylinder sleeve to a certain extent, but there are some problems: in cooling water Additive be not easily recycled, pollute environment；It is long to improve cylinder sleeve structural cycle, it is at high cost；Plasma spray technology can be used to prepare anti- Cavitation pitting coating, but coating, there are certain hole, coating surface needs sealing pores, once hole sealing agent is depleted, coating Resistance to pitcorrosion can be greatly reduced.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide a kind of preparations of the anti-cavitation pitting coating of wet cylinder liner outer wall Method is coated in wet cylinder liner outer wall preparation NiTi base composite coating using plasma spray, then using wet shot blasting method to spraying State coating carries out intensive treatment, realizes " compacting " on coating surface layer, improves the resistance to pitcorrosion energy of wet cylinder liner outer wall.
The technical solution for realizing the aim of the invention is as follows:
A kind of preparation method of the anti-cavitation pitting coating of wet cylinder liner outer wall is coated in the spraying of wet cylinder liner outer wall using plasma spray Spraying state NiTi base composite coating is obtained, passes through the mixture of compressed air-driven water and ceramic pellet using wet blasting, reaches it Injection obtains densification NiTi base composite coating to spraying state coating surface, compacting after to high speed.
Further, the method specifically comprises the following steps:
(1) NiTi powder and NiCr-Cr are weighed according to certain mass ratio3C2Powder, ball milling mixing are sieved, dry；
(2) wet liner outer wall cleaned, dried, using Brown Alundum sandblasting roughening treatment；
(3) wet cylinder liner outer wall spraying composite powder is coated in using plasma spray, obtains spraying state NiTi base composite coating；
(4) wet blasting spray gun is directed at spraying state coating area, by the mixture of compressed air-driven water and ceramic pellet, Injection obtains densification NiTi base composite coating to spraying state coating surface, compacting after reaching high speed；
(5) workpiece surface is cleared up after wet blasting processing, removes the ceramic pellet residue of workpiece surface, cleaning and baking It is dry, obtain fine and close NiTi base composite coating；
(6) turnery processing is carried out to fine and close NiTi base composite coating, Coating Surface Roughness is Ra 0.8- after turning 1.6。
Compared with prior art, the present invention its remarkable advantage is as follows:
(1) the application prepares NiTi base composite coating in wet cylinder liner outer wall using air plasma spraying technique, then Intensive treatment is carried out to spraying state coating using wet shot blasting method, " compacting " on coating surface layer is realized, significantly reduces coating Porosity significantly improves wet cylinder liner outer wall resistance to pitcorrosion energy.
(2) dusty spray that the application uses is NiTi powder and NiCr-Cr3C2Powder, i.e., it is good in resistance to pitcorrosion energy NiCr-75%Cr is added in NiTi alloy powder3C2Metal ceramic powder both can use the super-elasticity of NiTi alloy, also utilize Enhancing of the ceramic phase to NiTi matrix, the coating of formation significantly improve the resistance to pitcorrosion energy of NiTi coating.
Detailed description of the invention
Fig. 1 embodiment 1 sprays state NiTi base composite coating scanning electron microscope Cross Section Morphology figure.
Fig. 2 embodiment 1NiTi base composite coating XRD analysis.
Specific embodiment
The invention discloses a kind of preparation methods of the anti-cavitation pitting coating of wet cylinder liner outer wall, include the following steps: according to one Fixed mass ratio weighs NiTi powder and NiCr-Cr3C2Powder, is carried out ball milling mixing, and sieving obtains composite powder；To wet Formula cylinder jacket outer wall is cleaned, is dried, using Brown Alundum sandblasting roughening treatment；By the way of air plasma spraying, Wet cylinder liner outer wall is sprayed, and spraying state NiTi base composite coating is obtained；Wet blasting spray gun is directed at spraying state coating area, By the mixture of compressed air-driven water and ceramic pellet, injection extremely spraying state coating surface after high speed is reached；Wet blasting Workpiece surface is cleaned and dried after processing, obtains fine and close NiTi base composite coating；To the fine and close compound painting of NiTi base Layer carries out turnery processing.NiTi base composite coating of the present invention had both utilized the super-elasticity of NiTi powder, was also enhanced using ceramic phase Coating hardness is conducive to the resistance to pitcorrosion energy for improving coating.
Embodiment 1
The preparation method of the anti-cavitation pitting coating of wet cylinder liner outer wall, has that steps are as follows:
1. weighing NiTi powder and NiCr-Cr according to mass ratio 1:13C2Powder, is carried out ball milling mixing, and sieving obtains It is spare to be put in 80 DEG C of baking ovens dry 2h by composite powder of the particle size range at 45~74 μm for composite powder；
2. a pair wet liner outer wall is cleaned, is dried, the table using Brown Alundum sandblasting roughening treatment, after roughening treatment Surface roughness is Ra 8.0-10.0；
3. it is multiple to obtain spraying state NiTi base in wet cylinder liner outer wall spraying composite powder using air plasma spraying method Coating is closed, specific practice is that dried composite powder is put into powder feeder, powder feeding rate 18.2g/min.Adjust electric current For 517A, voltage 55.8V, argon flow 50L/min, hydrogen flowing quantity 3L/min, spray distance 120mm, rifle translation Speed is 200mm/s, and spraying number of repetition is 5 times.
4. wet blasting spray gun is directed at spraying state coating area, by the mixture of compressed air-driven water and ceramic pellet, Injection obtains densification NiTi base composite coating to spraying state coating surface, compacting after reaching high speed.The technique of wet blasting is joined Number are as follows: the outlet pressure of compressed air is 0.5MPa, and pellet injection distance is 80mm, the matter of water in the mixture of water and ceramic pellet Measuring score is 10%, and spray angle is 90 °, and wet blasting coverage rate is 100.
5. by the spraying state NiTi base composite coating being prepared by its Cross Section Morphology of scanning electron microscopic observation, such as Fig. 1 institute Show, discovery coating is well combined with matrix, and typical layer structure is presented in coating, and coating layer thickness is about 200 μm.
6. the NiTi base composite coating prepared by pair carries out its phase composition of XRD analysis, as a result as shown in Fig. 2, coating is main There are NiTi phase, NiCrO4Phase and Cr7C3Phase.
7. the spraying state NiTi base composite coating obtained by pair is hardness test, coating hardness HV0.1Vickers hardness can reach 668。
8. the NiTi base composite coating prepared by pair carries out the test of magnetostriction cavitation pitting, wherein sample is diameter phi 16mm circle Piece, sprays state NiTi by 60~70 μm of amplitude, frequency 20kHz, 25 DEG C of water temperature, sample Range Amplitude head 0.2mm, cavitation pitting duration 9h Base composite coating Accumulative weight loss amount is 2.3mg, and NiTi base composite coating Accumulative weight loss amount fine and close after wet blasting is tamped is 1.8mg。
Embodiment 2
The preparation method of the anti-cavitation pitting coating of wet cylinder liner outer wall, has that steps are as follows:
1. weighing NiTi powder and NiCr-Cr according to mass ratio 1:13C2Powder, is carried out ball milling mixing, and sieving obtains It is spare to be put in 80 DEG C of baking ovens dry 2h by composite powder of the particle size range at 45~74 μm for composite powder；
2. a pair wet liner outer wall is cleaned, is dried, the table using Brown Alundum sandblasting roughening treatment, after roughening treatment Surface roughness is Ra 8.0-10.0；
3. it is multiple to obtain spraying state NiTi base in wet cylinder liner outer wall spraying composite powder using air plasma spraying method Coating is closed, specific practice is that dried composite powder is put into powder feeder, powder feeding rate 18.2g/min.Adjust electric current For 517A, voltage 55.8V, argon flow 50L/min, hydrogen flowing quantity 6L/min, spray distance 120mm, rifle translation Speed is 200mm/s, and spraying number of repetition is 5 times.
4. wet blasting spray gun is directed at spraying state coating area, by the mixture of compressed air-driven water and ceramic pellet, Injection obtains densification NiTi base composite coating to spraying state coating surface, compacting after reaching high speed.The technique of wet blasting is joined Number are as follows: the outlet pressure of compressed air is 0.5MPa, and pellet injection distance is 80mm, the matter of water in the mixture of water and ceramic pellet Measuring score is 10%, and spray angle is 90 °, and wet blasting coverage rate is 100.
5. the spraying state NiTi base composite coating being prepared is found coating by its Cross Section Morphology of scanning electron microscopic observation It is well combined with matrix, typical layer structure is presented in coating, and coating layer thickness is about 200 μm.
6. the NiTi base composite coating prepared by pair carries out its phase composition of XRD analysis, coating is primarily present NiTi phase, NiCrO4Phase and Cr7C3Phase.
7. the spraying state NiTi base composite coating obtained by pair is hardness test, coating hardness HV0.1Vickers hardness can reach 698。
8. the NiTi base composite coating prepared by pair carries out the test of magnetostriction cavitation pitting, wherein sample is diameter phi 16mm circle Piece, sprays state NiTi by 60~70 μm of amplitude, frequency 20kHz, 25 DEG C of water temperature, sample Range Amplitude head 0.2mm, cavitation pitting duration 9h Base composite coating Accumulative weight loss amount is 1.5mg, and NiTi base composite coating Accumulative weight loss amount fine and close after wet blasting is tamped is 1.2mg。
The present invention carries out intensive treatment to spraying state coating using wet shot blasting method, effectively reduces the porosity of coating, Solve the problems, such as that air plasma spraying coating resistance to pitcorrosion can decline.

Claims (10)

1. a kind of preparation method of the anti-cavitation pitting coating of wet cylinder liner outer wall, which is characterized in that be coated in wet type cylinder using plasma spray It covers outer wall spraying and obtains spraying state NiTi base composite coating, pass through the mixing of compressed air-driven water and ceramic pellet using wet blasting Object, injection obtains densification NiTi base composite coating to spraying state coating surface, compacting after reaching high speed.
2. the method according to claim 1, wherein the method specifically comprises the following steps:
(1) NiTi powder and NiCr-Cr are weighed according to certain mass ratio3C2Powder, ball milling mixing are sieved, dry；
(2) wet liner outer wall cleaned, dried, using Brown Alundum sandblasting roughening treatment；
(3) wet cylinder liner outer wall spraying composite powder is coated in using plasma spray, obtains spraying state NiTi base composite coating；
(4) wet blasting spray gun is directed at spraying state coating area makes it by the mixture of compressed air-driven water and ceramic pellet Injection obtains densification NiTi base composite coating to spraying state coating surface, compacting after reaching high speed.
3. according to the method described in claim 2, it is characterized in that, the grain of the composite powder in the step (1) after sieving Diameter range is 45~74 μm, and dry is specially that composite powder is put in 80 ± 2 DEG C of baking ovens dry 2h.
4. according to the method described in claim 2, it is characterized in that, surface roughness in the step (2) after roughening treatment For Ra8.0-10.0.
5. according to the method described in claim 2, it is characterized in that, in the step (3) plasma spraying parameter are as follows: electric current For 500~520A, voltage is 40~60V, and argon flow is 45~55L/min, and hydrogen flowing quantity is 3~6L/min, spray distance For 100~120mm.
6. according to the method described in claim 2, it is characterized in that, in the step (4) wet blasting parameter are as follows: compressed air Outlet pressure be 0.3~0.6MPa, pellet injection distance is 50~150mm, the quality of water in the mixture of water and ceramic pellet Score is 5~15%, and spray angle is 80~100 °, and wet blasting coverage rate is 100%~500%.
7. according to the method described in claim 6, it is characterized in that, the ceramic pellet diameter is 0.05~0.3mm, ceramic Pelleting Constituent mass percentage is 65~70% zirconium dioxides, 28~32% silica and 0~5% aluminium oxide.
8. the method according to claim 1, wherein NiTi powder and NiCr-Cr in the step (1)3C2Powder Mass ratio is 1-3:1, and Ni and Ti atomic ratio are 1:1, NiCr-Cr in NiTi powder3C2NiCr ingredient and Cr in powder3C2Ingredient Mass ratio is 1:3.
9. according to the method described in claim 2, it is characterized in that, further including following steps:
(5) workpiece surface is cleared up after wet blasting processing, removes the ceramic pellet residue of workpiece surface, cleaning and drying, obtains Obtain fine and close NiTi base composite coating；
(6) turnery processing is carried out to fine and close NiTi base composite coating, Coating Surface Roughness is Ra0.8-1.6 after turning.
10. according to the method described in claim 9, it is characterized in that, NiTi base composite coating fine and close in the step (5) With a thickness of 100~350 μm.
CN201910421666.7A 2019-05-21 2019-05-21 Preparation method of anti-cavitation coating for outer wall of wet cylinder sleeve Active CN110144539B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110760845A (en) * 2019-12-16 2020-02-07 中国民航大学 Anti-oxidation high-hardness wear-resistant coating on titanium alloy surface and preparation method thereof
CN111020564A (en) * 2019-12-16 2020-04-17 中国民航大学 Rare earth-containing titanium-based laser cladding wear-resistant coating and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN101942629A (en) * 2010-09-17 2011-01-12 九江学院 Characterization method for quantifying carbide loss in hot spraying preparation of carbide cermet coating
CN102534455A (en) * 2011-12-28 2012-07-04 中国科学院宁波材料技术与工程研究所 Composite gradient coating thermally sprayed on surface of screw rod of injecting and molding machine and a method for preparing same
CN102628095A (en) * 2012-04-16 2012-08-08 江苏大学 Method for preparing metal nano-porous material with aid of laser peening
CN102851632A (en) * 2012-10-11 2013-01-02 江苏科技大学 Method for preparing high-temperature wear-resistant coating on continuous casting crystallizer copper alloy plate surface
CN103047293A (en) * 2012-12-17 2013-04-17 吴江市金平华纺织有限公司 Main shaft bushing of textile machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101942629A (en) * 2010-09-17 2011-01-12 九江学院 Characterization method for quantifying carbide loss in hot spraying preparation of carbide cermet coating
CN102534455A (en) * 2011-12-28 2012-07-04 中国科学院宁波材料技术与工程研究所 Composite gradient coating thermally sprayed on surface of screw rod of injecting and molding machine and a method for preparing same
CN102628095A (en) * 2012-04-16 2012-08-08 江苏大学 Method for preparing metal nano-porous material with aid of laser peening
CN102851632A (en) * 2012-10-11 2013-01-02 江苏科技大学 Method for preparing high-temperature wear-resistant coating on continuous casting crystallizer copper alloy plate surface
CN103047293A (en) * 2012-12-17 2013-04-17 吴江市金平华纺织有限公司 Main shaft bushing of textile machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110760845A (en) * 2019-12-16 2020-02-07 中国民航大学 Anti-oxidation high-hardness wear-resistant coating on titanium alloy surface and preparation method thereof
CN111020564A (en) * 2019-12-16 2020-04-17 中国民航大学 Rare earth-containing titanium-based laser cladding wear-resistant coating and preparation method thereof

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