CN112746247A - Self-lubricating gear and preparation method thereof - Google Patents
Self-lubricating gear and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 107
- 238000000576 coating method Methods 0.000 claims abstract description 107
- 239000002131 composite material Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 238000007733 ion plating Methods 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 24
- 239000011159 matrix material Substances 0.000 claims description 19
- 238000000151 deposition Methods 0.000 claims description 18
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 12
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 11
- 229910052719 titanium Inorganic materials 0.000 claims description 11
- 229910052720 vanadium Inorganic materials 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- 229910052726 zirconium Inorganic materials 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 claims description 6
- 239000007888 film coating Substances 0.000 claims description 6
- 238000009501 film coating Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 231100000719 pollutant Toxicity 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 abstract description 12
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- 239000003921 oil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 2
- 238000010849 ion bombardment Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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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
- 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
- C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
- C23C14/325—Electric arc evaporation
-
- 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
- C23C14/02—Pretreatment of the material to be coated
- C23C14/021—Cleaning or etching treatments
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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
- 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
- C23C14/0635—Carbides
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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
- 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
- C23C14/0641—Nitrides
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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
- 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
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
- C23C14/352—Sputtering by application of a magnetic field, e.g. magnetron sputtering using more than one target
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Physical Vapour Deposition (AREA)
Abstract
The invention discloses a self-lubricating gear and a preparation method thereof, wherein the self-lubricating gear comprises a bearing substrate, a micro-texture and a composite coating, wherein the micro-texture and the composite coating are coated on the surface of the bearing substrate; the composite coating comprises a first coating and a second coating, and the first coating and the second coating are alternately superposed; the first coating is a ZrZnMoN layer, and the second coating is a TiAgVC layer. The microtexture is prepared by laser processing, and the coating is codeposited by multi-arc ion plating and medium-frequency magnetron sputteringThe method of (1). When the gear is at a higher working temperature, the ZrZnMoN coating and the TiAgVC coating react with oxygen in the air to generate ZnMoO with a high-temperature lubricating effect4And Ag3VO4The compound has a lubricating effect, and meanwhile, the micro-texture can collect abrasive dust and store a lubricant, and the micro-texture is combined with the self-lubricating coating, so that the frictional wear of the tooth surface can be effectively reduced, and the service life of the gear is prolonged.
Description
Technical Field
The invention belongs to the technical field of gear manufacturing, and particularly relates to a self-lubricating gear and a preparation method thereof.
Background
In the process of gear transmission, large friction and abrasion exist between tooth surfaces to generate high heat, and if the heat generation of the gear in unit time is far greater than the heat dissipation, the temperature of the gear is higher and higher, so that the gear is easy to lose efficacy due to overhigh temperature. Therefore, the lubrication can reduce the friction wear of the tooth surface, and has important significance for prolonging the service life of the gear. The self-lubricating gear does not need lubricating oil and a complex lubricating system thereof, can form a lubricating film on the working surface, realizes the lubricating effect in the working process of the gear, and thus reduces the frictional wear and heat generation.
Chinese patent "application number: 201711395397.9 discloses a self-lubricating gear with micro-texture, which is characterized in that the surface of the gear is processed with the micro-texture and filled with a lubricating medium, and the micro-texture is softened at high friction temperature to form a lubricating film, thereby realizing the continuous self-lubricating effect in the friction area of the gear. Chinese patent "application number: 201710086850.1 discloses a honeycomb polygonal self-lubricating gear, which is characterized in that honeycomb grooves and strip-shaped grooves are processed on the surface of the gear based on bionics, and the self-lubricating effect of gear engagement is realized by filling a solid lubricant in the bionic grooves. Chinese patent "application number: 201810145366.6 discloses a multi-material composite self-lubricating gear, which is prepared by a 3D printing technology on the surface of a gear substrate to realize the self-lubricating function of the gear.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a self-lubricating gear and a preparation method thereof, wherein the gear can generate a lubricating film on the surface in a high-temperature environment, and the self-lubricating effect of the gear in the working process is realized, so that the frictional wear of the tooth surface is reduced, and the service life of the gear is prolonged.
In order to solve the technical problem, in one aspect, an embodiment of the present invention provides a self-lubricating gear, including a bearing substrate, a micro-texture and a composite coating, where the micro-texture and the composite coating are coated on a surface of the bearing substrate; the composite coating comprises a first coating and a second coating, and the first coating and the second coating are alternately superposed; the first coating is a ZrZnMoN layer, and the second coating is a TiAgVC layer.
Preferably, the composite coating at least comprises 5 ZrZnMoN layers and 5 TiAgVC layers, and the single-layer thickness of the first coating and the single-layer thickness of the second coating are both less than or equal to 200 nm.
Preferably, in the first coating, the atomic percent of Zr element is 30-50%, the atomic percent of Zn element is 10-20%, the atomic percent of Mo element is 10-20%, the atomic percent of N element is 20-35%, and the sum of the atomic percent of Zr, Zn, Mo and N element is 100%.
Preferably, in the second coating, the atomic percent of Ti element is 20-30%, the atomic percent of Ag element is 15-25%, the atomic percent of V element is 10-20%, the atomic percent of C element is 30-40%, and the sum of the atomic percent of Ti, Ag, V and C element is 100%.
Preferably, the gear base material is carbon steel or cast iron.
On the other hand, the embodiment of the invention provides a preparation method for preparing a self-lubricating gear, which comprises the following steps:
and 2, preparing the composite coating by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition.
Preferably, the micro texture is prepared by laser processing, and the specific preparation method comprises the following steps:
Preferably, the composite coating is prepared by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition, and the specific preparation method comprises the following steps:
step 3, adjusting the working air pressure to be 0.5-3.5Pa, the bias voltage to be 150-300V, adjusting the Zr target current to be 80-120A, starting the ZnMoN target, adjusting the target current to be 60-100A, and depositing the first coating for 2-15 min;
step 4, closing the Zr target and the ZnMoN target, adjusting the working air pressure to be 0.6-2.0Pa, adjusting the bias voltage to be 200-300V, starting the electric arc power supply of the Ti target, the Ag target and the VC target, wherein the current of the Ti target is 100-120A, the current of the Ag target is 60-80A, the current of the VC target is 80-120A, and depositing a second coating for 2-15 min;
step 5, repeating the step 3 and the step 4, and alternately depositing the first coating and the second coating to obtain a laminated coating, wherein the total thickness of the composite coating is 2-100 mu m;
and 6, closing all the targets, the bias power supply and the gas source, preserving the heat for 30-60min, and finishing the coating.
Has the advantages that: 1. the gear has good self-lubricating effect under the high-temperature working condition, and ZrZnMoN and TiAgVC react with oxygen in the air at higher temperature to generate ZnMoO with high-temperature lubricating effect4And Ag3VO4The compound can play a good lubricating role under the high-temperature condition; 2. the micro-texture on the surface of the gear can improve the bonding strength of a matrix and a coating, can collect abrasive dust and a high-temperature lubricating phase, and plays roles in reducing abrasive wear and providing secondary lubrication, so that the service life of the gear is prolonged; 3. the gear surface coating of the invention is of a nano laminated structure, the internal stress is small, and the coatingThe bonding strength is high; 4. the gear is a self-lubricating gear, does not need lubricating oil or a complex lubricating system thereof, and has simple structure and convenient use.
Drawings
Fig. 1 is a schematic structural view of a self-lubricating gear of the present invention.
In the figure: 1 gear substrate, 2 microtexture, 3 first coating and 4 second coating.
Detailed Description
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
As shown in fig. 1, the embodiment adopted by the present invention is as follows:
example 1: a self-lubricating gear is characterized in that a gear base material is 45 carbon steel, and the surface of the base material is provided with a self-lubricating laminated coating with a micro texture and ZrZnMoN + TiAgVC alternately distributed. The laminated coating contains 5 ZrZnMoN layers and 5 TiAgVC layers, and the thickness of each ZrZnMoN layer and each TiAgVC layer is 200 nm.
According to the self-lubricating gear, the atomic percent of Zr element in the ZrZnMoN coating is 50%, the atomic percent of Zn element is 10%, the atomic percent of Mo element is 20%, the atomic percent of N element is 20%, and the sum of the atomic percent of Zr, Zn, Mo and N element is 100%; in the TiAgVC coating, the atomic percent of Ti element is 30%, the atomic percent of Ag element is 20%, the atomic percent of V element is 10%, the atomic percent of C element is 40%, and the sum of the atomic percent of Ti, Ag, V and C element is 100%.
The preparation method of the self-lubricating gear comprises the following steps:
and 2, preparing the composite coating by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition.
Further, the method for preparing the microtexture by laser processing comprises the following steps:
further, the composite coating is prepared by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition, and the specific preparation method comprises the following steps:
step 3, adjusting the working pressure to be 1.5Pa, the bias voltage to be 150V, adjusting the Zr target current to be 120A, starting the ZnMoN target, adjusting the target current to be 80A, and depositing the ZrZnMoN coating for 12 min;
step 4, closing the Zr target and the ZnMoN target, adjusting the working air pressure to be 2.0Pa, adjusting the bias voltage to be 200V, starting the Ti target, the Ag target and the VC target arc power supply, setting the Ti target current to be 120A, the Ag target current to be 60A and the VC target current to be 90A, and depositing the TiAgVC coating for 12 min;
step 5, repeating the steps 3 and 4, and alternately depositing a ZrZnMoN + TiAgVC laminated coating to enable the total thickness of the coating to be 2 microns;
and 6, closing all the targets, the bias power supply and the gas source, preserving the heat for 60min, and finishing the coating.
Example 2: a self-lubricating gear is characterized in that a gear substrate is made of HT200 cast iron, and the surface of the gear substrate is provided with a laminated coating with a micro texture and ZrZnMoN + TiAgVC alternately distributed. The laminated coating comprises 50 ZrZnMoN layers and 50 TiAgVC layers, and the thickness of each ZrZnMoN layer and each TiAgVC layer is 100 nm.
According to the self-lubricating gear, the atomic percent of Zr element in the ZrZnMoN coating is 35%, the atomic percent of Zn element is 20%, the atomic percent of Mo element is 15%, the atomic percent of N element is 30%, and the sum of the atomic percent of the Zr element, the Zn element, the Mo element and the N element is 100%; in the TiAgVC coating, the atomic percent of Ti element is 25%, the atomic percent of Ag element is 25%, the atomic percent of V element is 20%, the atomic percent of C element is 30%, and the sum of the atomic percent of Ti, Ag, V and C element is 100%.
The preparation method of the self-lubricating gear comprises the following steps:
and 2, preparing the composite coating by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition.
Further, the method for preparing the microtexture by laser processing comprises the following steps:
further, the composite coating is prepared by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition, and the specific preparation method comprises the following steps:
step 3, adjusting the working pressure to be 3.5Pa, the bias voltage to be 250V, adjusting the Zr target current to be 90A, starting the ZnMoN target, adjusting the target current to be 100A, and depositing the ZrZnMoN coating for 3 min;
step 4, closing the Zr target and the ZnMoN target, adjusting the working air pressure to be 2.0Pa, adjusting the bias voltage to be 300V, starting the Ti target, the Ag target and the VC target arc power supply, setting the current of the Ti target to be 100A, the current of the Ag target to be 80A and the current of the VC target to be 100A, and depositing the TiAgVC coating for 3 min;
step 5, repeating the steps 3 and 4, and alternately depositing a ZrZnMoN + TiAgVC laminated coating to enable the total thickness of the coating to be 10 microns;
and 6, closing all the targets, the bias power supply and the gas source, preserving the heat for 40min, and finishing the coating.
Example 3: a self-lubricating gear is characterized in that a gear substrate is made of HT200 cast iron, and the surface of the gear substrate is provided with a laminated coating with a micro texture and ZrZnMoN + TiAgVC alternately distributed. The laminated coating comprises 20 ZrZnMoN layers and 20 TiAgVC layers, and the thickness of each ZrZnMoN layer and each TiAgVC layer is 80 nm.
According to the self-lubricating gear, the atomic percent of Zr element in the ZrZnMoN coating is 30%, the atomic percent of Zn element is 15%, the atomic percent of Mo element is 20%, the atomic percent of N element is 35%, and the sum of the atomic percent of Zr, Zn, Mo and N element is 100%; in the TiAgVC coating, the atomic percent of Ti element is 30%, the atomic percent of Ag element is 15%, the atomic percent of V element is 18%, the atomic percent of C element is 37%, and the sum of the atomic percent of Ti, Ag, V and C element is 100%.
The preparation method of the self-lubricating gear comprises the following steps:
and 2, preparing the composite coating by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition.
Further, the method for preparing the microtexture by laser processing comprises the following steps:
further, the composite coating is prepared by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition, and the specific preparation method comprises the following steps:
step 3, adjusting the working pressure to be 0.5Pa, the bias voltage to be 300V, adjusting the Zr target current to be 80A, starting the ZnMoN target, adjusting the target current to be 60A, and depositing the ZrZnMoN coating for 2 min;
step 4, closing the Zr target and the ZnMoN target, adjusting the working air pressure to be 0.6Pa, adjusting the bias voltage to be 250V, starting the Ti target, the Ag target and the VC target arc power supply, setting the Ti target current to be 110A, the Ag target current to be 70A and the VC target current to be 80A, and depositing the TiAgVC coating for 2 min;
step 5, repeating the steps 3 and 4, and alternately depositing a ZrZnMoN + TiAgVC laminated coating to enable the total thickness of the coating to be 100 mu m;
and 6, closing all the targets, the bias power supply and the gas source, preserving the heat for 30min, and finishing the coating.
Example 4: a self-lubricating gear is characterized in that a gear substrate is made of HT200 cast iron, and the surface of the gear substrate is provided with a laminated coating with a micro texture and ZrZnMoN + TiAgVC alternately distributed. The laminated coating contains 40 ZrZnMoN layers and 40 TiAgVC layers, and the thickness of each ZrZnMoN layer and each TiAgVC layer is 50 nm.
According to the self-lubricating gear, the atomic percent of Zr element in the ZrZnMoN coating is 35%, the atomic percent of Zn element is 20%, the atomic percent of Mo element is 10%, the atomic percent of N element is 35%, and the sum of the atomic percent of Zr, Zn, Mo and N element is 100%; in the TiAgVC coating, the atomic percent of Ti element is 20%, the atomic percent of Ag element is 20%, the atomic percent of V element is 20%, the atomic percent of C element is 40%, and the sum of the atomic percent of Ti, Ag, V and C element is 100%.
The preparation method of the self-lubricating gear comprises the following steps:
and 2, preparing the composite coating by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition.
Further, the method for preparing the microtexture by laser processing comprises the following steps:
further, the composite coating is prepared by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition, and the specific preparation method comprises the following steps:
step 3, adjusting the working pressure to be 3.5Pa, the bias voltage to be 250V, adjusting the Zr target current to be 90A, starting the ZnMoN target, adjusting the target current to be 100A, and depositing the ZrZnMoN coating for 15 min;
step 4, closing the Zr target and the ZnMoN target, adjusting the working air pressure to be 1.0Pa, adjusting the bias voltage to be 300V, starting the Ti target, the Ag target and the VC target arc power supply, setting the Ti target current to be 100A, the Ag target current to be 80A and the VC target current to be 120A, and depositing the TiAgVC coating for 15 min;
step 5, repeating the steps 3 and 4, and alternately depositing a ZrZnMoN + TiAgVC laminated coating to enable the total thickness of the coating to be 50 microns;
and 6, closing all the targets, the bias power supply and the gas source, preserving the heat for 30min, and finishing the coating.
The embodiments of the present invention are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the content of the claims of the present invention should be regarded as the technical scope of the present invention.
Claims (8)
1. A self-lubricating gear is characterized by comprising a bearing substrate (1), a micro texture (2) and a composite coating, wherein the micro texture (2) and the composite coating are coated on the surface of the bearing substrate (1); the composite coating comprises a first coating (3) and a second coating (4), wherein the first coating (3) and the second coating (4) are alternately superposed; the first coating (3) is a ZrZnMoN layer, and the second coating (4) is a TiAgVC layer.
2. Self-lubricating gear according to claim 1, characterized in that the composite coating contains at least 5 ZrZnMoN layers and 5 tiagv layers, the first coating (3) and the second coating (4) each having a monolayer thickness of 200nm or less.
3. A self-lubricating gear according to claim 1, characterised in that in the first coating (3) the atomic percentage of Zr element is 30-50%, the atomic percentage of Zn element is 10-20%, the atomic percentage of Mo element is 10-20%, the atomic percentage of N element is 20-35%, and the sum of the atomic percentages of Zr, Zn, Mo and N elements is 100%.
4. Self-lubricating gear according to claim 1, characterised in that in the second coating (4) the atomic percentage of Ti is comprised between 20 and 30%, the atomic percentage of Ag is comprised between 15 and 25%, the atomic percentage of V is comprised between 10 and 20%, the atomic percentage of C is comprised between 30 and 40%, the sum of the atomic percentages of Ti, Ag, V and C being 100%.
5. Self-lubricating gear according to claim 1, characterised in that the material of the gear base (1) is carbon steel or cast iron.
6. A method for producing a self-lubricating gear according to any one of claims 1 to 5, comprising:
step 1, preparing a micro-texture (2) by laser processing;
and 2, preparing the composite coating by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition.
7. Method for preparing a self-lubricating gear according to claim 6, characterized in that said microtexture (2) is prepared by laser machining, comprising the following steps:
step 1, pretreatment: grinding and polishing the gear matrix (1), and sequentially putting the gear matrix into alcohol and acetone for ultrasonic cleaning for 20-30min respectively to remove oil stain pollutants on the surface;
step 2, processing the microtexture (2): the method is characterized in that nanosecond laser is adopted to process a micro texture (2) on the surface of a gear matrix (1), the width of the micro texture (2) is 10-100 mu m, and the depth of the micro texture (2) is 10-200 mu m.
8. The preparation method of the self-lubricating gear according to claim 6, wherein the composite coating is prepared by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition, and the specific preparation method comprises the following steps:
step 1, placing the textured gear into alcohol for ultrasonic cleaning for 20-30min, fully drying the gear by adopting a vacuum drying oven, and quickly placing the gear into a vacuum chamber of a film coating machine, wherein the background vacuum of the vacuum chamber is 7.0 multiplied by 10-3-8.0×10-3Pa, heating to 150 ℃ and 200 ℃, and keeping the temperature for 30-40 min;
step 2, introducing Ar gas with the pressure of 0.5-3.0Pa, starting a bias voltage power supply with the voltage of 600-1000V and the duty ratio of 0.25-0.3, and performing glow discharge cleaning for 20-30 min; reducing the bias voltage to 250-600V, starting ion source ion cleaning for 20-30min, starting the arc source Zr target, wherein the bias voltage is 300-600V, the target current is 40-60A, and the ion bombards the Zr target for 0.5-2.0 min;
step 3, adjusting the working air pressure to be 0.5-3.5Pa, the bias voltage to be 150-300V, adjusting the Zr target current to be 80-120A, starting the ZnMoN target, adjusting the target current to be 60-100A, and depositing the first coating (3) for 2-15 min;
step 4, closing the Zr target and the ZnMoN target, adjusting the working air pressure to be 0.6-2.0Pa, adjusting the bias voltage to be 200-300V, starting the electric arc power supply of the Ti target, the Ag target and the VC target, setting the current of the Ti target to be 100-120A, the current of the Ag target to be 60-80A and the current of the VC target to be 80-120A, and depositing a second coating (4) for 2-15 min;
step 5, repeating the step 3 and the step 4, and alternately depositing the first coating (3) and the second coating (4) to obtain a laminated coating, wherein the total thickness of the composite coating is 2-100 mu m;
and 6, closing all the targets, the bias power supply and the gas source, preserving the heat for 30-60min, and finishing the coating.
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| CN113774315A (en) * | 2021-09-13 | 2021-12-10 | 北京金轮坤天特种机械有限公司 | Aviation heavy-load gear and preparation method thereof |
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