CN108677149A - A kind of high abrasion anti-corrosion PVD coating process - Google Patents
A kind of high abrasion anti-corrosion PVD coating process Download PDFInfo
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- CN108677149A CN108677149A CN201810655477.1A CN201810655477A CN108677149A CN 108677149 A CN108677149 A CN 108677149A CN 201810655477 A CN201810655477 A CN 201810655477A CN 108677149 A CN108677149 A CN 108677149A
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- corrosion
- coating process
- high abrasion
- pvd coating
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- 238000005260 corrosion Methods 0.000 title claims abstract description 16
- 238000000576 coating method Methods 0.000 title claims abstract description 15
- 238000005299 abrasion Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- CHHHXKFHOYLYRE-UHFFFAOYSA-M 2,4-Hexadienoic acid, potassium salt (1:1), (2E,4E)- Chemical compound [K+].CC=CC=CC([O-])=O CHHHXKFHOYLYRE-UHFFFAOYSA-M 0.000 claims abstract description 7
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229920002367 Polyisobutene Polymers 0.000 claims abstract description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052796 boron Inorganic materials 0.000 claims abstract description 7
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 7
- 239000010941 cobalt Substances 0.000 claims abstract description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 239000011733 molybdenum Substances 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 7
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 7
- 235000010241 potassium sorbate Nutrition 0.000 claims abstract description 7
- 239000004302 potassium sorbate Substances 0.000 claims abstract description 7
- 229940069338 potassium sorbate Drugs 0.000 claims abstract description 7
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 7
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical class [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims abstract description 7
- 235000010234 sodium benzoate Nutrition 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 7
- 239000010937 tungsten Substances 0.000 claims abstract description 7
- 238000010894 electron beam technology Methods 0.000 claims abstract description 6
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 239000004299 sodium benzoate Substances 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 4
- 229910052738 indium Inorganic materials 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/28—Vacuum evaporation by wave energy or particle radiation
- C23C14/30—Vacuum evaporation by wave energy or particle radiation by electron bombardment
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C09D123/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C09D123/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefines
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C09D127/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of high abrasion anti-corrosion PVD coating process, and steel part is positioned in the vacuum chamber of PVD equipment；Electron beam heating is carried out to vacuum chamber；Silicon, rhenium, titanium, boron, molybdenum, manganese, tungsten, cobalt, nickel element material are subjected to plated film to steel part；Polyvinyl chloride, polyisobutene, Shi La ﹑ sodium benzoates and potassium sorbate are coated again；Cooling steel part, you can.Compared with prior art, the present invention effectively improves the case hardness of steel class part, and has corrosion resistance, improves the service life of machinery, has the value of popularization and application.
Description
Technical field
The present invention relates to a kind of surface metal treatment process more particularly to a kind of high abrasion anti-corrosion PVD coating process.
Background technology
Steel class part is usually used in various machineries, and the general case hardness of machine components is poor, and abrasion is more serious, to
Service life is reduced, and corrosion resistance is also poor, accordingly, there exist rooms for improvement.
Invention content
The purpose of the present invention is that solve the above-mentioned problems and provides a kind of high abrasion anti-corrosion PVD coating process.
The present invention is achieved through the following technical solutions above-mentioned purpose：
The present invention includes the following steps：
（1）Steel part is positioned in the vacuum chamber of PVD equipment；
（2）Electron beam heating is carried out to vacuum chamber；
（3）Silicon, rhenium, titanium, boron, molybdenum, manganese, tungsten, cobalt, nickel element material are subjected to plated film to steel part；
（4）Polyvinyl chloride, polyisobutene, Shi La ﹑ sodium benzoates and potassium sorbate are coated again；
（5）Cooling steel part, you can.
Preferably, the step（3）In, in molar ratio, the silicon, which accounts for the 20%, rhenium and accounts for the 5%, titanium, to be accounted for 15%, is described
Boron, which accounts for the 5%, molybdenum and accounts for the 3%, manganese and account for the 3%, tungsten and account for the 4%, cobalt and account for the 15%, nickel, accounts for 30%.
Preferably, the step（4）In, in molar ratio, the polyvinyl chloride 20%, the polyisobutene 20%, the stone
Sodium benzoate 40%, the potassium sorbate 10% described in 10% ﹑ of wax.
Preferably, the step（2）In electron beam heating temperature be 300-400 DEG C.
Preferably, the step（1）In vacuum pressure be 10kPa.
Preferably, the thickness of total coating is 5 ~ 20 μm.
The beneficial effects of the present invention are：
The present invention is a kind of high abrasion anti-corrosion PVD coating process, and compared with prior art, the present invention effectively improves steel class part
Case hardness, and there is corrosion resistance, the service life of machinery is improved, is had the value of popularization and application.
Specific implementation mode
The invention will be further described below：
The present invention includes the following steps：
（1）Steel part is positioned in the vacuum chamber of PVD equipment；
（2）Electron beam heating is carried out to vacuum chamber；
（3）Silicon, rhenium, titanium, boron, molybdenum, manganese, tungsten, cobalt, nickel element material are subjected to plated film to steel part；
（4）Polyvinyl chloride, polyisobutene, Shi La ﹑ sodium benzoates and potassium sorbate are coated again；
（5）Cooling steel part, you can.
Preferably, the step（3）In, in molar ratio, the silicon, which accounts for the 20%, rhenium and accounts for the 5%, titanium, to be accounted for 15%, is described
Boron, which accounts for the 5%, molybdenum and accounts for the 3%, manganese and account for the 3%, tungsten and account for the 4%, cobalt and account for the 15%, nickel, accounts for 30%.
Preferably, the step（4）In, in molar ratio, the polyvinyl chloride 20%, the polyisobutene 20%, the stone
Sodium benzoate 40%, the potassium sorbate 10% described in 10% ﹑ of wax.
Preferably, the step（2）In electron beam heating temperature be 300-400 DEG C.
Preferably, the step（1）In vacuum pressure be 10kPa.
Preferably, it is preferred that the thickness of total coating is 5 ~ 20 μm.
After tested, wear-resisting property：Hardness HV >=1000；Corrosion resistance requirement：Neutral salt spray test reaches 240h, ackd salt
Mist reaches 96h.
The basic principles and main features and advantages of the present invention of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (6)
1. a kind of high abrasion anti-corrosion PVD coating process, which is characterized in that include the following steps：
Steel part is positioned in the vacuum chamber of PVD equipment；
Electron beam heating is carried out to vacuum chamber；
Silicon, rhenium, titanium, boron, molybdenum, manganese, tungsten, cobalt, nickel element material are subjected to plated film to steel part；
Polyvinyl chloride, polyisobutene, Shi La ﹑ sodium benzoates and potassium sorbate are coated again；
Cooling steel part, you can.
2. high abrasion anti-corrosion PVD coating process according to claim 1, it is characterised in that：The step（3）In, massage
Your ratio, the silicon, which accounts for the 20%, rhenium and accounts for the 5%, titanium and account for the 15%, boron and account for the 5%, molybdenum and account for the 3%, manganese, to be accounted for 3%, is described
Tungsten, which accounts for the 4%, cobalt and accounts for the 15%, nickel, accounts for 30%.
3. high abrasion anti-corrosion PVD coating process according to claim 1, it is characterised in that：The step（4）In, massage
Your ratio, the polyvinyl chloride 20%, the polyisobutene 20%, sodium benzoate 40%, the potassium sorbate described in 10% ﹑ of the paraffin
10%。
4. high abrasion anti-corrosion PVD coating process according to claim 1, it is characterised in that：The step（2）In electronics
Beam heating temperature is 300-400 DEG C.
5. high abrasion anti-corrosion PVD coating process according to claim 1, it is characterised in that：The step（1）In vacuum
Pressure is 10kPa.
6. high abrasion anti-corrosion PVD coating process according to claim 1, it is characterised in that：The thickness of total coating is 5 ~ 20 μ
m。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810655477.1A CN108677149A (en) | 2018-06-23 | 2018-06-23 | A kind of high abrasion anti-corrosion PVD coating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810655477.1A CN108677149A (en) | 2018-06-23 | 2018-06-23 | A kind of high abrasion anti-corrosion PVD coating process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108677149A true CN108677149A (en) | 2018-10-19 |
Family
ID=63811853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810655477.1A Pending CN108677149A (en) | 2018-06-23 | 2018-06-23 | A kind of high abrasion anti-corrosion PVD coating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108677149A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433486A (en) * | 2000-06-08 | 2003-07-30 | 表面工程设计产品公司 | Coating system for high temperature stainless steel |
| CN1483769A (en) * | 2002-05-07 | 2004-03-24 | ���չ�˾ | Metallic coating with oxidation resistance and fatigue resistance |
| CN1796594A (en) * | 2004-12-20 | 2006-07-05 | 北京师范大学 | Ion implantation process method for surface of metal material embedded to human body |
| CN1867699A (en) * | 2003-10-17 | 2006-11-22 | 西门子公司 | Protective layer for the protection of a component against corrosion and oxidation at elevated temperatures, and component |
| CN102757850A (en) * | 2012-05-31 | 2012-10-31 | 天长市润达金属防锈助剂有限公司 | Micro-emulsified carbon steel cutting fluid |
| CN105671417A (en) * | 2016-01-26 | 2016-06-15 | 安徽同盛环件股份有限公司 | High-hardness wear-resisting alloy steel suitable for annular supporting piece and preparing method |
| CN108048795A (en) * | 2017-12-27 | 2018-05-18 | 西安文理学院 | A kind of machinery part surface coating process |
-
2018
- 2018-06-23 CN CN201810655477.1A patent/CN108677149A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433486A (en) * | 2000-06-08 | 2003-07-30 | 表面工程设计产品公司 | Coating system for high temperature stainless steel |
| CN1483769A (en) * | 2002-05-07 | 2004-03-24 | ���չ�˾ | Metallic coating with oxidation resistance and fatigue resistance |
| CN1867699A (en) * | 2003-10-17 | 2006-11-22 | 西门子公司 | Protective layer for the protection of a component against corrosion and oxidation at elevated temperatures, and component |
| CN1796594A (en) * | 2004-12-20 | 2006-07-05 | 北京师范大学 | Ion implantation process method for surface of metal material embedded to human body |
| CN102757850A (en) * | 2012-05-31 | 2012-10-31 | 天长市润达金属防锈助剂有限公司 | Micro-emulsified carbon steel cutting fluid |
| CN105671417A (en) * | 2016-01-26 | 2016-06-15 | 安徽同盛环件股份有限公司 | High-hardness wear-resisting alloy steel suitable for annular supporting piece and preparing method |
| CN108048795A (en) * | 2017-12-27 | 2018-05-18 | 西安文理学院 | A kind of machinery part surface coating process |
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Application publication date: 20181019 |
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