CN106947935A - A kind of method that thermal spraying prepares wear-resistant coating - Google Patents
A kind of method that thermal spraying prepares wear-resistant coating Download PDFInfo
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- CN106947935A CN106947935A CN201710320633.4A CN201710320633A CN106947935A CN 106947935 A CN106947935 A CN 106947935A CN 201710320633 A CN201710320633 A CN 201710320633A CN 106947935 A CN106947935 A CN 106947935A
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- sprayed
- wear
- resistant coating
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- spraying
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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
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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 discloses a kind of method that thermal spraying prepares wear-resistant coating.The present invention is by plasma spraying technology, after molybdenum, two kinds of metal dust mechanical alloyings of tantalum, and the workpiece surface for needing to spray is handled, and is then sprayed under argon gas and hydrogen effect, to realize the preparation of wear-resistant coating.Wear-resistant coating prepared by the present invention, with the combination property that high rigidity, corrosion-resistant, low friction etc. are excellent, can greatly improve mechanical part service life.
Description
Technical field
The present invention relates to a kind of method that thermal spraying prepares wear-resistant coating, belong to the fields such as plasma spray technology, sufacing.
Background technology
More extreme, the mechanical movement to machine operating environment requirement with social development in science and technology and aviation, navigation, industry
Part is faced with serious fretting wear problem, it is therefore desirable to which high performance wear-and corrosion-resistant coating provides safeguard.On the other hand, mesh
Direction of the preceding all trades and professions machinery just towards long-life, high stable is developed, and the performance requirement of equipment coating is increasingly improved.And mesh
Preceding used coating material and technology are all to grow up last century 70, the eighties, in reliability, long-life, ultralow are rubbed
Use requirement can not be met in terms of wiping.Being applied to the low friction of coating material and long-life under extreme operating condition in recent years is
Key technology, thus tool be of great significance.
For example, obvious component wear just occurs in more than 5 years in the operation of major part engine at present, greatly reduce whole
Body performance, with the popularization and the energy-saving and emission-reduction of global range of today's society automobile, reliability and service life to machinery are carried
Higher requirement is gone out.Not exclusively communications and transportation, the high sophisticated technology an urgent demand such as Aeronautics and Astronautics, nuclear energy using high temperature resistant,
Wear-resisting, low friction coating is the operating efficiency of field key components and parts such as increase space flight, defeated to protect the surface of metallic element
Go out power and service life.
Plasma spraying has a splendid potentiality and market as ripe and widely used spraying technology, its high speed from
In the presence of subflow and protection gas, it can make coating that there is preferably tissue and performance.
Molybdenum is the rare metal granite with its own strategic significance, and its fusing point is high, intensity is big, hardness is high, wearability and lead
Electrical conductivity is good, in addition, the molybdenum coefficient of expansion it is small, with good corrosion resisting property, thus be widely used in metallurgy, machinery, oil,
The numerous areas such as chemical industry, Aero-Space, electronics, nuclear industry.
Tantalum have high density, high-melting-point, anti-corrosion, excellent elevated temperature strength, good processability, solderability and low modeling/
The advantages of crisp transition temperature, its excellent dynamic mechanical and oxidation-treated rear surface formed it is fine and close, stably, high dielectric it is normal
The features such as several amorphous oxide film and be widely used in the fields such as electronics, chemical industry, Aero-Space.
The content of the invention
The present invention at present in the urgent need to high rigidity, wear-resisting and corrosion resistant metal coating demand a kind of thermal spraying is provided
The method for preparing wear-resistant coating.
Coating of the present invention can be used for the wear-resistant of metal surface and reduction coefficient of friction.
A kind of method that thermal spraying prepares wear-resistant coating, it is characterised in that concretely comprise the following steps：
1）It is 4 in mass ratio that mass percent purity is into 99% molybdenum powder and tantalum powder：1 or 7：3 ratio mixing, passes through ball
Grinding machine, which carries out mechanical alloying processing, makes granularity be 42-54 μm, then sealed storage；
2）Workpiece surface to be sprayed is eliminated rust to any surface finish, acetone is immersed afterwards and carries out ultrasonication 40-50min progress
Degreasing, then carries out blasting treatment to the whole uniform no-reflections in spraying position to surface to be sprayed；
3）Sprayed using plasma spray equipment, argon gas is main protection gas in spraying process, hydrogen is used as anti-oxidation gas；Will
After workpiece to be sprayed is fixed, argon gas is first sent, carrying out spray to impurity in spray gun removes, and then passes to hydrogen and is sprayed；Spraying
When technological parameter be：Spray distance 100-150mm, operating current 360-440A, operating voltage 145-147V, Ar gas velocity degree
100-150L/min, hydrogen rate 10-20L/min, powder sending quantity 30-40g/min, spray gun body phase move speed to crankshaft spraying face
Spend 10-100mm/s；
4）Big air cooling.
24# Brown Alundums are selected in the sandblasting, and blasting pressure is 0.2-0.4Mpa.
The workpiece to be sprayed is Al, Fe, Ti or No. 45 steel.
The gross thickness of the wear-resistant coating is 0.7-0.12mm.
The metal coating that the present invention is obtained has preferable wearability, corrosion resistance, possesses relatively low coefficient of friction simultaneously
Also anti-attrition.
Brief description of the drawings
Fig. 1 is the coefficient of friction figure of the gained coating of embodiment 1 of the present invention.
Fig. 2 is the coefficient of friction figure of the gained coating of embodiment 2 of the present invention.
Embodiment
Embodiment 1
Molybdenum powder and tantalum powder by mass percent purity all for 99% press 4：1 ratio is mixed, and mechanical alloying is carried out by ball mill
Processing make its most of granularity in 42-54 μ ms, after the completion of in time sealed storage；
One piece of diameter 24mm, high 8mm No. 45 steel of cylinder are taken, the workpiece surface for needing to spray is eliminated rust to any surface finish, it
Immersion acetone carries out ultrasonication 50min and carries out degreasing afterwards, then takes out sealing；
Blasting treatment is carried out to No. 45 steel surfaces for needing to spray, 24# Brown Alundums are selected in sandblasting, and blasting pressure is 0.25MPa, spray
Sand extremely sprays position all uniform no-reflections；
Using plasma spraying equipment, specific spray parameters are as follows：Spray distance：100(mm)；Electric current：420（A）；Voltage：157
（V）；Argon gas speed：150L/min；Hydrogen rate：15L/min；Powder sending quantity：30g/min.
Methods described prepare metal coating at normal temperatures, load 20N, frequency for 25Hz fine motion friction test in, tool
There are high rigidity, wear-resisting, anti-corrosion characteristic, and with relatively low coefficient of friction.
Embodiment 2
Molybdenum powder and tantalum powder by mass percent purity all for 99% press 7：3 ratios are mixed, and mechanical alloying is carried out by ball mill
Processing make its most of granularity in 42-54 μ ms, after the completion of in time sealed storage；
One piece of diameter 24mm, high 8mm No. 45 steel of cylinder are taken, the workpiece surface for needing to spray is eliminated rust to any surface finish, it
Immersion acetone carries out ultrasonication 40min and carries out degreasing afterwards, then takes out sealing；
Blasting treatment is carried out to No. 45 steel surfaces for needing to spray, 24# Brown Alundums are selected in sandblasting, and blasting pressure is 0.3MPa, spray
Sand extremely sprays position all uniform no-reflections；
Using plasma spraying equipment, specific spray parameters are as follows：Spray distance：100(mm)；Electric current：420（A）；Voltage：167
（V）；Argon gas speed：150L/min；Hydrogen rate：20L/min；Powder sending quantity：40g/min.
Methods described prepare metal coating at normal temperatures, load 20N, frequency for 25Hz fine motion friction test in, tool
There are high rigidity, wear-resisting, anti-corrosion characteristic, and with relatively low coefficient of friction.
Claims (4)
1. a kind of method that thermal spraying prepares wear-resistant coating, it is characterised in that concretely comprise the following steps：
1）It is 4 in mass ratio that mass percent purity is into 99% molybdenum powder and tantalum powder：1 or 7：3 ratio mixing, passes through ball
Grinding machine, which carries out mechanical alloying processing, makes granularity be 42-54 μm, then sealed storage；
2）Workpiece surface to be sprayed is eliminated rust to any surface finish, acetone is immersed afterwards and carries out ultrasonication 40-50min progress
Degreasing, then carries out blasting treatment to the whole uniform no-reflections in spraying position to surface to be sprayed；
3）Sprayed using plasma spray equipment, argon gas is main protection gas in spraying process, hydrogen is used as anti-oxidation gas；Will
After workpiece to be sprayed is fixed, argon gas is first sent, carrying out spray to impurity in spray gun removes, and then passes to hydrogen and is sprayed；Spraying
When technological parameter be：Spray distance 100-150mm, operating current 360-440A, operating voltage 145-147V, Ar gas velocity degree
100-150L/min, hydrogen rate 10-20L/min, powder sending quantity 30-40g/min, spray gun body phase move speed to crankshaft spraying face
Spend 10-100mm/s；
4）Big air cooling.
2. the method as described in claim 1, it is characterised in that 24# Brown Alundums are selected in the sandblasting, and blasting pressure is 0.2-
0.4Mpa。
3. the method as described in claim 1, it is characterised in that the workpiece to be sprayed is Al, Fe, Ti or No. 45 steel.
4. the method as described in claim 1, it is characterised in that the gross thickness of the wear-resistant coating is 0.7-0.12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710320633.4A CN106947935B (en) | 2017-05-09 | 2017-05-09 | A kind of method that thermal spraying prepares wear-resistant coating |
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| CN201710320633.4A CN106947935B (en) | 2017-05-09 | 2017-05-09 | A kind of method that thermal spraying prepares wear-resistant coating |
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| CN106947935A true CN106947935A (en) | 2017-07-14 |
| CN106947935B CN106947935B (en) | 2019-08-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220860A (en) * | 2017-12-21 | 2018-06-29 | 中国科学院兰州化学物理研究所 | A kind of preparation method of graded composite wear-and corrosion-resistant coating |
| CN111676440A (en) * | 2020-07-30 | 2020-09-18 | 中国科学院兰州化学物理研究所 | Preparation method of tantalum oxide in-situ composite tantalum-based nanocrystalline wear-resistant and anti-friction coating |
| CN113502107A (en) * | 2021-07-06 | 2021-10-15 | 上海巴洛特新材料研究有限公司 | Metal coating formula and spraying method |
| CN114214588A (en) * | 2021-12-01 | 2022-03-22 | 上海航天设备制造总厂有限公司 | High-temperature self-adaptive lubricating coating for space environment and preparation method |
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| CN101363687A (en) * | 2008-09-19 | 2009-02-11 | 中国科学院上海硅酸盐研究所 | Composite coating for high-temperature container for metal melting and method for making same |
| CN105543757A (en) * | 2015-12-18 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Heat-resistant wear-resistant engine cylinder inner-wall coating and preparation method thereof |
| CN105603356A (en) * | 2016-03-30 | 2016-05-25 | 西安交通大学 | Metal coating with high bonding strength and high cohesion strength, as well as thermal spraying method and application of metal coating |
| CN105642885A (en) * | 2016-03-30 | 2016-06-08 | 西安交通大学 | Thermal spraying self-bonding metal alloy powder with coated composite structure |
| CN106048488A (en) * | 2016-06-21 | 2016-10-26 | 西安理工大学 | Method of preparing high-temperature oxidation-resistant coating on surface of refractory metal material |
-
2017
- 2017-05-09 CN CN201710320633.4A patent/CN106947935B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101363687A (en) * | 2008-09-19 | 2009-02-11 | 中国科学院上海硅酸盐研究所 | Composite coating for high-temperature container for metal melting and method for making same |
| CN105543757A (en) * | 2015-12-18 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Heat-resistant wear-resistant engine cylinder inner-wall coating and preparation method thereof |
| CN105603356A (en) * | 2016-03-30 | 2016-05-25 | 西安交通大学 | Metal coating with high bonding strength and high cohesion strength, as well as thermal spraying method and application of metal coating |
| CN105642885A (en) * | 2016-03-30 | 2016-06-08 | 西安交通大学 | Thermal spraying self-bonding metal alloy powder with coated composite structure |
| CN106048488A (en) * | 2016-06-21 | 2016-10-26 | 西安理工大学 | Method of preparing high-temperature oxidation-resistant coating on surface of refractory metal material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220860A (en) * | 2017-12-21 | 2018-06-29 | 中国科学院兰州化学物理研究所 | A kind of preparation method of graded composite wear-and corrosion-resistant coating |
| CN111676440A (en) * | 2020-07-30 | 2020-09-18 | 中国科学院兰州化学物理研究所 | Preparation method of tantalum oxide in-situ composite tantalum-based nanocrystalline wear-resistant and anti-friction coating |
| CN113502107A (en) * | 2021-07-06 | 2021-10-15 | 上海巴洛特新材料研究有限公司 | Metal coating formula and spraying method |
| CN114214588A (en) * | 2021-12-01 | 2022-03-22 | 上海航天设备制造总厂有限公司 | High-temperature self-adaptive lubricating coating for space environment and preparation method |
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| Publication number | Publication date |
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| CN106947935B (en) | 2019-08-02 |
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