CN112410641A - Laser cladding coating material for engine intake and exhaust valves and manufacturing process - Google Patents
Laser cladding coating material for engine intake and exhaust valves and manufacturing process Download PDFInfo
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- CN112410641A CN112410641A CN202011210200.1A CN202011210200A CN112410641A CN 112410641 A CN112410641 A CN 112410641A CN 202011210200 A CN202011210200 A CN 202011210200A CN 112410641 A CN112410641 A CN 112410641A
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- Prior art keywords
- laser cladding
- coating material
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- valve
- engine
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- 238000004372 laser cladding Methods 0.000 title claims abstract description 65
- 239000011248 coating agent Substances 0.000 title claims abstract description 52
- 238000000576 coating method Methods 0.000 title claims abstract description 52
- 239000000463 material Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000001035 drying Methods 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 238000000498 ball milling Methods 0.000 claims abstract description 25
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000005498 polishing Methods 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005253 cladding Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The invention discloses a laser cladding coating material for an engine intake valve and an engine exhaust valve, which comprises the following powder in percentage by mass: ni: 25-32%; nb: 15-18%; si: 2.0-2.8%; c: 1.0-1.5%; fe: 5-8%; w: 3-5%; al: 0.15-0.25%; ti: 0.5-1.2%; the balance being Co; the manufacturing process comprises the following steps: ball-milling the powder by a ball mill; polishing and polishing the surface of the valve base body, cleaning and drying; then stirring the ball-milled powder mixture into paste by using a diacetone alcohol solution, pre-coating the paste on the surface of the valve substrate, airing the paste for 30-60 minutes at room temperature, and drying the paste; carrying out laser cladding on the dried sample to form a laser cladding coating on the surface of the valve substrate; the invention leads the coating material to be well combined with the matrix, thereby leading the obtained product to have excellent performance and meeting the use requirement; the valve has the performances of high temperature resistance and wear resistance, so that the service life of the valve is long and the use effect is good.
Description
Technical Field
The invention relates to the technical field of preparation of an engine intake valve and an engine exhaust valve, in particular to a laser cladding coating material for the engine intake valve and the engine exhaust valve and a manufacturing process thereof.
Background
Laser cladding, also known as laser cladding or laser cladding, is a new surface modification technique. The laser manufacturing method relates to various subjects such as light, mechanics, electricity, materials, detection and control, and is one of the most important core technologies of the laser advanced manufacturing technology. The cladding layer prepared by the technology can obviously improve the comprehensive performances of wear resistance, corrosion resistance, heat resistance, high-temperature oxidation resistance, fatigue resistance and the like of the surface of the matrix, thereby achieving the purpose of surface modification or repair, meeting the requirements on the specific performance of the surface of the material and saving a large amount of precious elements. Compared with surfacing, spraying, electroplating and vapor deposition, laser cladding has the advantages of small dilution, compact structure, good combination of the coating and the matrix, more suitable cladding materials and the like.
The selected coating material is placed on the surface of the clad matrix by laser cladding, and is simultaneously melted with a thin layer on the surface of the matrix by laser irradiation, and the selected coating material is rapidly solidified to form a surface coating with extremely low dilution degree and metallurgical bonding with the matrix, so that the process method for obviously improving the wear-resisting, corrosion-resisting, heat-resisting, oxidation-resisting and electrical characteristics of the surface of the base layer is realized, thereby achieving the purpose of surface modification or repair, not only meeting the requirements on the specific performance of the surface of the material, but also saving a large amount of precious elements.
The existing laser cladding material can not well meet the requirements of high temperature resistance and wear resistance of an intake valve and an exhaust valve of an engine, and the coating material can not be well combined with a matrix.
Disclosure of Invention
The invention aims to provide a laser cladding coating material for an engine intake valve and an engine exhaust valve and a manufacturing process thereof, and solves the problems that the existing laser cladding material can not well meet the requirements of high temperature resistance and wear resistance of the engine intake valve and the engine exhaust valve, and the coating material can not be well combined with a matrix.
The invention is realized in this way, a laser cladding coating material for engine intake and exhaust valves, which is characterized in that: the laser cladding coating material comprises the following powder in percentage by mass: ni: 25-32%; nb: 15-18%; si: 2.0-2.8%; c: 1.0-1.5%; fe: 5-8%; w: 3-5%; al: 0.15-0.25%; ti: 0.5-1.2%; the balance being Co.
The further technical scheme of the invention is as follows: the laser cladding coating material comprises the following powder in percentage by mass: ni: 28-30%; nb: 15-16%; si: 2.5-2.8%; c: 1.2-1.5%; fe: 6-8%; w: 3-5%; al: 0.15-0.20%; ti: 0.5-0.8%; the balance being Co.
The further technical scheme of the invention is as follows: the average particle size of the powder is 50-80 μm.
A manufacturing process of a laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following steps:
the method comprises the following steps: ball-milling the powder according to the percentage by a ball mill;
polishing and polishing the surface of the valve base body, cleaning, and drying for later use;
thirdly, stirring the powder mixture subjected to ball milling in the first step into paste by using a diacetone alcohol solution, and pre-coating the paste on the surface of the valve substrate, wherein the thickness of the paste is 1-2.0 mm; drying the mixture at room temperature for 30-60 minutes;
and step four, carrying out laser cladding on the dried sample obtained in the step three, so that a laser cladding coating is formed on the surface of the valve substrate.
The further technical scheme of the invention is as follows: in the first step, the ball milling speed is 80-100 r/min, the ball material ratio is 10-20: 1, and the ball milling time is 2-3 h.
The further technical scheme of the invention is as follows: in the second step, absolute ethyl alcohol is adopted for ultrasonic cleaning; wherein the drying temperature is 60-120 ℃, and the drying time is 2-3 h.
The further technical scheme of the invention is as follows: the drying in the third step is as follows: and drying the mixture in an oven at the temperature of 250-300 ℃ for 1-2 h.
The further technical scheme of the invention is as follows: in the fourth step, the laser cladding is carried out by adopting a carbon dioxide transverse laser beam, the surface of the valve substrate is protected by inert gas, the output power is 3.5-4.5 kW, the diameter of a light spot is 5-10 mm, and the scanning speed is 800-1500 mm/min.
The further technical scheme of the invention is as follows: and in the fourth step, the valve substrate is placed in a protective gas cover or a cavity in an inert atmosphere for laser cladding, the protective gas is argon or nitrogen, and the gas flow is 15-20L/min.
The invention has the beneficial effects that: the coating material and the manufacturing process adopted by the invention can well combine the coating material with the matrix, so that the obtained product has excellent performance and meets the use requirement; the valve has the performances of high temperature resistance and wear resistance, so that the service life of the valve is long, and the use effect is good.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
A laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following powder in percentage by mass: ni: 25-32%; nb: 15-18%; si: 2.0-2.8%; c: 1.0-1.5%; fe: 5-8%; w: 3-5%; al: 0.15-0.25%; ti: 0.5-1.2%; the balance being Co.
The laser cladding coating material comprises the following powder in percentage by mass: ni: 28-30%; nb: 15-16%; si: 2.5-2.8%; c: 1.2-1.5%; fe: 6-8%; w: 3-5%; al: 0.15-0.20%; ti: 0.5-0.8%; the balance being Co.
The average particle size of the powder is 50-80 μm.
A manufacturing process of a laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following steps:
the method comprises the following steps: ball-milling the powder according to the percentage by a ball mill;
polishing and polishing the surface of the valve base body, cleaning, and drying for later use;
thirdly, stirring the powder mixture subjected to ball milling in the first step into paste by using a diacetone alcohol solution, and pre-coating the paste on the surface of the valve substrate, wherein the thickness of the paste is 1-2.0 mm; drying the mixture at room temperature for 30-60 minutes;
and step four, carrying out laser cladding on the dried sample obtained in the step three, so that a laser cladding coating is formed on the surface of the valve substrate.
In the first step, the ball milling speed is 80-100 r/min, the ball material ratio is 10-20: 1, and the ball milling time is 2-3 h.
In the second step, absolute ethyl alcohol is adopted for ultrasonic cleaning; wherein the drying temperature is 60-120 ℃, and the drying time is 2-3 h.
The drying in the third step is as follows: and drying the mixture in an oven at the temperature of 250-300 ℃ for 1-2 h.
In the fourth step, the laser cladding is carried out by adopting a carbon dioxide transverse laser beam, the surface of the valve substrate is protected by inert gas, the output power is 3.5-4.5 kW, the diameter of a light spot is 5-10 mm, and the scanning speed is 800-1500 mm/min.
And in the fourth step, the valve substrate is placed in a protective gas cover or a cavity in an inert atmosphere for laser cladding, the protective gas is argon or nitrogen, and the gas flow is 15-20L/min.
The first embodiment is as follows:
a laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following powder in percentage by mass: ni: 28%; nb: 15 percent; si: 2.5 percent; c: 1.2 percent; fe: 6 percent; w: 3 percent; al: 0.15 percent; ti: 0.5 percent; the balance being Co.
The average particle size of the powder was 50 μm.
A manufacturing process of a laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following steps:
the method comprises the following steps: ball-milling the powder according to the percentage by a ball mill;
polishing and polishing the surface of the valve base body, cleaning, and drying for later use;
thirdly, stirring the powder mixture subjected to ball milling in the first step into paste by using a diacetone alcohol solution, and pre-coating the paste on the surface of the valve substrate, wherein the thickness of the paste is 1 mm; drying the mixture at room temperature for 30 minutes;
and step four, carrying out laser cladding on the dried sample obtained in the step three, so that a laser cladding coating is formed on the surface of the valve substrate.
In the first step, the ball milling speed is 80r/min, the ball-material ratio is 10:1, and the ball milling time is 2 h.
In the second step, absolute ethyl alcohol is adopted for ultrasonic cleaning; wherein the drying temperature is 60 ℃ and the drying time is 2 h.
The drying in the third step is as follows: drying in an oven at 250 deg.C for 1 h.
In the fourth step, laser cladding is carried out by adopting a carbon dioxide transverse laser beam, inert gas protection is carried out on the surface of the valve substrate, the output power is 3.5kW, the diameter of a light spot is 5mm, and the scanning speed is 800 mm/min.
And in the fourth step, the valve substrate is placed in a protective gas cover in inert atmosphere for laser cladding, the protective gas is argon, and the gas flow is 15L/min.
The micro-hardness of the cladding layer is measured by adopting an HVS-1000A type micro-hardness instrument, wherein five values are measured at different positions of the cladding layer, an average value is taken after the maximum value and the minimum value are removed, and a test result shows that the average hardness after laser cladding reaches 1089HV, and is obviously improved compared with a base material.
Example two:
a laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following powder in percentage by mass: ni: 29 percent; nb: 15 percent; si: 2.6 percent; c: 1.2 percent; fe: 7 percent; w: 4 percent; al: 0.18 percent; ti: 0.5 percent; the balance being Co.
The average particle size of the powder was 60 μm.
A manufacturing process of a laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following steps:
the method comprises the following steps: ball-milling the powder according to the percentage by a ball mill;
polishing and polishing the surface of the valve base body, cleaning, and drying for later use;
thirdly, stirring the powder mixture subjected to ball milling in the first step into paste by using a diacetone alcohol solution, and pre-coating the paste on the surface of the valve substrate, wherein the thickness of the paste is 2.0 mm; drying at room temperature for 45 minutes;
and step four, carrying out laser cladding on the dried sample obtained in the step three, so that a laser cladding coating is formed on the surface of the valve substrate.
In the first step, the ball milling speed is 90r/min, the ball-material ratio is 15:1, and the ball milling time is 3 h.
In the second step, absolute ethyl alcohol is adopted for ultrasonic cleaning; wherein the drying temperature is 100 ℃, and the drying time is 3 h.
The drying in the third step is as follows: drying in an oven at 280 deg.C for 2 h.
In the fourth step, laser cladding is carried out by adopting a carbon dioxide transverse laser beam, inert gas protection is carried out on the surface of the valve substrate, the output power is 4.0kW, the diameter of a light spot is 8mm, and the scanning speed is 1200 mm/min.
And in the fourth step, the valve substrate is placed in a protective gas cover in inert atmosphere for laser cladding, the protective gas is argon, and the gas flow is 16L/min.
The microhardness of the cladding layer is measured by adopting an HVS-1000A type microhardness instrument, wherein five values are measured at different positions of the cladding layer, an average value is taken after the maximum value and the minimum value are removed, and a test result shows that the average hardness after laser cladding reaches 1920HV, and is obviously improved compared with a base material.
Example three:
a laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following powder in percentage by mass: ni: 30 percent; nb: 16 percent; si: 2.8 percent; c: 1.5 percent; fe: 8 percent; w: 5 percent; al: 0.20 percent; ti: 0.8 percent; the balance being Co.
The average particle size of the powder was 80 μm.
A manufacturing process of a laser cladding coating material for an engine intake valve and an engine exhaust valve comprises the following steps:
the method comprises the following steps: ball-milling the powder according to the percentage by a ball mill;
polishing and polishing the surface of the valve base body, cleaning, and drying for later use;
thirdly, stirring the powder mixture subjected to ball milling in the first step into paste by using a diacetone alcohol solution, and pre-coating the paste on the surface of the valve substrate, wherein the thickness of the paste is 2.0 mm; drying at room temperature for 60 minutes;
and step four, carrying out laser cladding on the dried sample obtained in the step three, so that a laser cladding coating is formed on the surface of the valve substrate.
In the first step, the ball milling speed is 100r/min, the ball-material ratio is 20:1, and the ball milling time is 3 h.
In the second step, absolute ethyl alcohol is adopted for ultrasonic cleaning; wherein the drying temperature is 120 ℃, and the drying time is 3 h.
The drying in the third step is as follows: drying in an oven at 300 deg.C for 2 h.
In the fourth step, laser cladding is carried out by adopting a carbon dioxide transverse laser beam, inert gas protection is carried out on the surface of the valve substrate, the output power is 4.5kW, the diameter of a light spot is 10mm, and the scanning speed is 1500 mm/min.
And in the fourth step, the valve substrate is placed in a protective gas cover in inert atmosphere for laser cladding, the protective gas is nitrogen, and the gas flow is 20L/min.
The micro-hardness of the cladding layer is measured by adopting an HVS-1000A type micro-hardness instrument, wherein five values are measured at different positions of the cladding layer, an average value is taken after the maximum value and the minimum value are removed, and a test result shows that the average hardness after laser cladding reaches 1237HV, and is obviously improved compared with a parent material.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The laser cladding coating material for the air inlet and exhaust valves of the engine is characterized in that: the laser cladding coating material comprises the following powder in percentage by mass: ni: 25-32%; nb: 15-18%; si: 2.0-2.8%; c: 1.0-1.5%; fe: 5-8%; w: 3-5%; al: 0.15-0.25%; ti: 0.5-1.2%; the balance being Co.
2. The laser cladding coating material for the air inlet and outlet valves of the engine as claimed in claim 1, wherein: the laser cladding coating material comprises the following powder in percentage by mass: ni: 28-30%; nb: 15-16%; si: 2.5-2.8%; c: 1.2-1.5%; fe: 6-8%; w: 3-5%; al: 0.15-0.20%; ti: 0.5-0.8%; the balance being Co.
3. The laser cladding coating material for the air inlet and outlet valves of the engine as claimed in any one of claims 1-2, wherein: the average particle size of the powder is 50-80 μm.
4. The manufacturing process of the laser cladding coating material for the air inlet and exhaust valves of the engine according to any one of claims 1-2, characterized in that: the manufacturing process comprises the following steps:
the method comprises the following steps: ball-milling the powder according to the percentage by a ball mill;
polishing and polishing the surface of the valve base body, cleaning, and drying for later use;
thirdly, stirring the powder mixture subjected to ball milling in the first step into paste by using a diacetone alcohol solution, and pre-coating the paste on the surface of the valve substrate, wherein the thickness of the paste is 1-2.0 mm; drying the mixture at room temperature for 30-60 minutes;
and step four, carrying out laser cladding on the dried sample obtained in the step three, so that a laser cladding coating is formed on the surface of the valve substrate.
5. The manufacturing process of the laser cladding coating material for the air inlet and exhaust valves of the engine as claimed in claim 4, wherein the manufacturing process comprises the following steps: in the first step, the ball milling speed is 80-100 r/min, the ball material ratio is 10-20: 1, and the ball milling time is 2-3 h.
6. The manufacturing process of the laser cladding coating material for the air inlet and exhaust valves of the engine as claimed in claim 4, wherein the manufacturing process comprises the following steps: in the second step, absolute ethyl alcohol is adopted for ultrasonic cleaning; wherein the drying temperature is 60-120 ℃, and the drying time is 2-3 h.
7. The manufacturing process of the laser cladding coating material for the air inlet and exhaust valves of the engine as claimed in claim 4, wherein the manufacturing process comprises the following steps: the drying in the third step is as follows: and drying the mixture in an oven at the temperature of 250-300 ℃ for 1-2 h.
8. The manufacturing process of the laser cladding coating material for the air inlet and exhaust valves of the engine as claimed in claim 4, wherein the manufacturing process comprises the following steps: in the fourth step, the laser cladding is carried out by adopting a carbon dioxide transverse laser beam, the surface of the valve substrate is protected by inert gas, the output power is 3.5-4.5 kW, the diameter of a light spot is 5-10 mm, and the scanning speed is 800-1500 mm/min.
9. The manufacturing process of the laser cladding coating material for the air inlet and exhaust valves of the engine as claimed in claim 4, wherein the manufacturing process comprises the following steps: and in the fourth step, the valve substrate is placed in a protective gas cover or a cavity in an inert atmosphere for laser cladding, the protective gas is argon or nitrogen, and the gas flow is 15-20L/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011210200.1A CN112410641A (en) | 2020-11-03 | 2020-11-03 | Laser cladding coating material for engine intake and exhaust valves and manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011210200.1A CN112410641A (en) | 2020-11-03 | 2020-11-03 | Laser cladding coating material for engine intake and exhaust valves and manufacturing process |
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| CN202011210200.1A Pending CN112410641A (en) | 2020-11-03 | 2020-11-03 | Laser cladding coating material for engine intake and exhaust valves and manufacturing process |
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2020
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| US5593726A (en) * | 1990-05-10 | 1997-01-14 | Apv Corporation Limited | Hot isostatic pressing process for applying wear and corrosion resistant coatings |
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| CN101838807A (en) * | 2010-04-19 | 2010-09-22 | 浙江吉利汽车研究院有限公司 | Laser cladding coating material for inlet valve and exhaust valve of engine and coating thereof |
| CN103614723A (en) * | 2013-12-19 | 2014-03-05 | 山东大学 | TiC-reinforced cobalt-based metal ceramic composite coating on titanium alloy surface and preparation process thereof |
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