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CN112725731A - Wide-temperature-range self-lubricating gear and preparation method thereof - Google Patents

Wide-temperature-range self-lubricating gear and preparation method thereof Download PDF

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Publication number
CN112725731A
CN112725731A CN202011402773.4A CN202011402773A CN112725731A CN 112725731 A CN112725731 A CN 112725731A CN 202011402773 A CN202011402773 A CN 202011402773A CN 112725731 A CN112725731 A CN 112725731A
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coating
gear
target
lubricating
atomic percent
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Inventor
邢佑强
李燕凡
张克栋
骆诚
万一枝
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Southeast University
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Southeast University
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • 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
    • 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
    • C23C14/22—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
    • 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
    • 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)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Gears, Cams (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

The invention provides a wide temperature range self-lubricating gear and a preparation method thereof, wherein the wide temperature range self-lubricating gear comprises a gear matrix and a composite coating, wherein the composite coating is deposited on the surface of the gear matrix; 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 ZrAgTaC layer, and the second coating is a MoTeVC layer. When the working temperature of the gear is low, the MoTeVC coating can play a role in lubricating; when the working temperature is higher, ZrAgTaC, MoTeVC and O in air2Can react to generate Ag with high-temperature lubrication effect3VO4And Ag2MoO4The compound, thereby being capable of playing a lubricating role. The gear has good self-lubricating effect under the conditions of wide temperature range or alternating temperature, the frictional wear of the tooth surface can be reduced, and the service life of the gear is prolonged.

Description

Wide-temperature-range self-lubricating gear and preparation method thereof
Technical Field
The invention relates to the technical field of gear manufacturing, in particular to a wide-temperature-range self-lubricating gear and a preparation method thereof.
Background
Gears are mechanical elements that are widely used in transmissions to transmit motion and power through continuous engagement. In the transmission process, large friction and abrasion exist between tooth surfaces, high heat is generated, 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, gear transmissions require adequate lubrication to reduce frictional wear between gears, reduce heat generation, and extend gear life. 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. However, how to improve the lubrication performance of the gears under a wide temperature range or alternating temperature condition becomes a difficult problem in the working process of the gears.
The Chinese patent application No. 201711395397.9 discloses a self-lubricating gear with a micro-texture, wherein the surface of the gear is processed with the micro-texture and is filled with a lubricating medium, and the micro-texture is softened at a high friction temperature to form a lubricating film, so that the continuous self-lubricating effect of a friction area of the gear is realized. Chinese patent application No. 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 form a self-lubricating coating, so that the self-lubricating function of the gear is realized. Chinese patent application No. 201110209055.X discloses a self-lubricating gear, and gear transmission self-lubricating effect is realized through setting up lubricating arrangement on the gear body.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the wide-temperature-range self-lubricating gear has good self-lubricating capability in a wide temperature range and an alternating temperature range, can realize lubrication in the working process of the gear, and reduces the frictional wear of the tooth surface, thereby prolonging the service life of the gear.
In order to solve the technical problem, the invention provides a wide-temperature-range self-lubricating gear, which comprises a gear substrate and a composite coating, wherein the composite coating is deposited on the surface of the gear 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 ZrAgTaC layer, and the second coating is a MoTeVC layer.
As a further refinement of an embodiment of the invention, the composite coating comprises at least 10 first coating layers and at least 10 second coating layers, each of the first and second coating layers having a thickness of 100nm or less.
As a further improvement of the embodiment of the invention, in the first coating, the atomic percent of Zr element is 30-50%, the atomic percent of Ag element is 15-25%, the atomic percent of Ta element is 5-15%, the atomic percent of C element is 20-40%, and the sum of the atomic percent of Zr element, Ag element, Ta element and C element is 100%.
As a further improvement of the embodiment of the invention, in the second coating, the atomic percent of Mo element is 20-25%, the atomic percent of Te element is 40-50%, the atomic percent of V element is 10-20%, the atomic percent of C element is 10-20%, and the sum of the atomic percent of Mo element, Te element, V element and C element is 100%.
As a further improvement of an embodiment of the present invention, the gear base body is made of carbon steel or stainless steel.
On the other hand, the embodiment of the invention also provides a preparation method for preparing the wide-temperature-range self-lubricating gear, which comprises the following steps:
step 1, pretreatment: sequentially putting the gear matrix into alcohol and acetone for ultrasonic cleaning for 20-30min respectively to remove surface oil stain pollutants, fully drying by adopting a vacuum drying oven, quickly putting into a vacuum chamber of a coating machine, heating to the temperature of 150-;
step 2, ion cleaning: 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 an ion source for ion cleaning for 20-30min, starting an 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, depositing a first coating: adjusting the working air pressure to be 0.5-2.0Pa, the bias voltage to be 100-250V, adjusting the Zr target current to be 80-150A, starting the Ag target, adjusting the target current to be 80-100A, starting the TaC arc power supply, adjusting the target current to be 80-150A, and depositing the first coating for 2-10 min;
and 4, depositing a second coating: closing the Zr target, the Ag target and the TaC target, adjusting the working pressure to 0.8-2.5Pa, the bias pressure to 300-2Target and VC target arc Power supply, MoTe2The target current is 100-120A, the VC target current is 60-90A, and the second coating is deposited for 2-10 min;
and 5, repeating the steps 3 and 4 until the total thickness of the composite coating is the preset thickness, closing all the targets, the bias power supply and the gas source, and preserving heat for 30-60min to obtain the wide-temperature-range self-lubricating gear.
As a further improvement of the embodiment of the present invention, the predetermined thickness is 2 to 100 μm.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the embodiment of the invention provides a wide-temperature-range self-lubricating gear and a preparation method thereof. The gear provided by the embodiment of the invention has a good self-adaptive lubricating effect in a wide temperature range working range, and the MoTeVC coating can play a lubricating role when the working temperature is low; when the working temperature is higher, ZrAgTaC, MoTeVC and oxygen in the air react to generate Ag with high-temperature lubrication effect3VO4And Ag2MoO4The compound can play a good lubricating role under high-temperature conditions. In the embodiment of the invention, the composite coating deposited on the surface of the gear substrate is of a nano laminated structure, the internal stress is small, and the bonding strength of the coating is high. The gear provided by the embodiment of the invention does not need lubricating oil or a complex lubricating system, and is simple in structure and convenient to use; the ZrAgTaC + MoTeVC laminated coating improves the performance of a single coating and increases the applicability of the gearAnd (3) a range.
Drawings
Fig. 1 is a schematic structural view of a wide temperature range self-lubricating gear according to an embodiment of the present invention.
In the figure: gear base body 1, first coating 21, second coating 22.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
The embodiment of the invention provides a wide-temperature-range self-lubricating gear, which comprises a gear matrix 1 and a composite coating, wherein the composite coating is deposited on the surface of the gear matrix 1, as shown in figure 1. The composite coating comprises a first coating 21 and a second coating 22, the first coating 21 and the second coating 22 being alternately stacked. The first coating 21 is a ZrAgTaC layer and the second coating 22 is a MoTeVC layer.
The gear provided by the embodiment of the invention has good self-lubricating capability in a wide temperature range and an alternating temperature range, can realize lubrication in the working process of the gear, and reduces the frictional wear of the tooth surface, thereby prolonging the service life of the gear. The gear provided by the embodiment of the invention has a good self-adaptive lubricating effect in a wide temperature range working range, and the MoTeVC coating can play a lubricating role when the working temperature is low; when the working temperature is higher, ZrAgTaC, MoTeVC and oxygen in the air react to generate Ag with high-temperature lubrication effect3VO4And Ag2MoO4The compound can play a good lubricating role under high-temperature conditions. In the embodiment of the invention, the composite coating deposited on the surface of the gear substrate is of a nano laminated structure, the internal stress is small, and the bonding strength of the coating is high. The gear provided by the embodiment of the invention does not need lubricating oil or a complex lubricating system, and is simple in structure and convenient to use;
the ZrAgTaC + MoTeVC laminated coating improves the performance of a single coating and increases the application range of the gear.
Preferably, the first coating layer 21 has at least 10 layers, the second coating layer 22 has at least 10 layers, and the thickness of each of the first coating layer 21 and the second coating layer 22 is 100nm or less.
Preferably, in the first coating layer 21, the atomic percent of the Zr element is 30-50%, the atomic percent of the Ag element is 15-25%, the atomic percent of the Ta element is 5-15%, the atomic percent of the C element is 20-40%, and the sum of the atomic percent of the Zr element, the Ag element, the Ta element and the C element is 100%.
Preferably, in the second coating layer 22, the atomic percent of the Mo element is 20 to 25%, the atomic percent of the Te element is 40 to 50%, the atomic percent of the V element is 10 to 20%, the atomic percent of the C element is 10 to 20%, and the sum of the atomic percent of the Mo element, the Te element, the V element and the C element is 100%.
Preferably, the gear base body 1 is made of carbon steel or stainless steel.
The embodiment of the invention also provides a preparation method for preparing the wide-temperature-range self-lubricating gear, which comprises the following steps:
step 1, pretreatment: sequentially putting the gear matrix 1 into alcohol and acetone for ultrasonic cleaning for 20-30min respectively to remove surface oil stain pollutants, fully drying by adopting a vacuum drying box, quickly putting into a vacuum chamber of a coating machine, heating to the temperature of 150 ℃ and 300 ℃ and preserving heat for 30-40min, wherein the background vacuum of the vacuum chamber is 7.0 multiplied by 10 < -3 > to 8.0 multiplied by 10 < -3 > Pa;
step 2, ion cleaning: 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 an ion source for ion cleaning for 20-30min, starting an 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, depositing a first coating 21: adjusting the working air pressure to be 0.5-2.0Pa, the bias voltage to be 100-250V, adjusting the Zr target current to be 80-150A, starting the Ag target, adjusting the target current to be 80-100A, starting the TaC arc power supply, adjusting the target current to be 80-150A, and depositing the first coating for 2-10 min;
step 4, depositing a second coating 22: closing the Zr target, the Ag target and the TaC target, adjusting the working pressure to 0.8-2.5Pa, the bias pressure to 300-2Target and VC target arc Power supply, MoTe2The target current is 100-120A, the VC target current is 60-90A, and the second coating is deposited for 2-10 min;
and 5, repeating the steps 3 and 4 until the total thickness of the composite coating is the preset thickness, closing all the targets, the bias power supply and the gas source, and preserving heat for 30-60min to obtain the wide-temperature-range self-lubricating gear.
Preferably, the predetermined thickness is 2 to 100 μm.
According to the method provided by the embodiment of the invention, the composite coating is prepared on the surface of the gear matrix by adopting a method of multi-arc ion plating and medium-frequency magnetron sputtering codeposition, and the preparation method is simple. The gear prepared by the method disclosed by the embodiment of the invention has a good self-adaptive lubricating effect in a wide temperature range working range, and when the working temperature is lower, the MoTeVC coating can play a lubricating role; when the working temperature is higher, ZrAgTaC, MoTeVC and oxygen in the air react to generate Ag with high-temperature lubrication effect3VO4And Ag2MoO4The compound can play a good lubricating role under high-temperature conditions. The composite coating deposited on the surface of the gear matrix is of a nano laminated structure, the internal stress is small, and the bonding strength of the coating is high. Does not need lubricating oil and a complex lubricating system, and has simple structure and convenient use. The ZrAgTaC + MoTeVC laminated coating improves the performance of a single coating and increases the application range of the gear.
Example 1
Step 1, sequentially putting a gear matrix into alcohol and acetone for ultrasonic cleaning for 20min respectively, removing surface oil stain pollutants, fully drying by adopting a vacuum drying oven, quickly putting into a vacuum chamber of a coating machine, heating to 220 ℃ and keeping the temperature for 30min, wherein the background vacuum of the vacuum chamber is 7.0 multiplied by 10 < -3 > Pa;
step 2, introducing Ar gas, starting a bias voltage power supply with the voltage of 600V and the duty ratio of 0.25 under the pressure of 1.0Pa, and performing glow discharge cleaning for 20 min; reducing the bias voltage to 300V, starting ion source ion cleaning for 30min, starting an arc source Zr target, wherein the bias voltage is 350V, the target current is 40A, and the ion bombards the Zr target for 2.0 min;
step 3, adjusting the working air pressure to be 2.0Pa, the bias voltage to be 150V, adjusting the Zr target current to be 100A, starting the Ag target, adjusting the target current to be 80A, starting the TaC arc power supply, adjusting the target current to be 90A, and depositing the ZrAgTaC coating for 8 min;
step 4, closing the Zr target, the Ag target and the TaC target, adjusting the working air pressure to be 1.5Pa, adjusting the bias voltage to be 300V, and opening MoTe2Target and VC target arcPower supply, MoTe2The target current is 100A, the VC target current is 70A, and the MoTeVC coating is deposited for 10 min;
and 5, repeating the steps 3 and 4 until the total thickness of the composite coating is 4 micrometers, closing all the targets, the bias power supply and the gas source, and preserving heat for 30min to obtain the wide-temperature-range self-lubricating gear.
According to the prepared wide-temperature-range self-lubricating gear, the material of the gear matrix is 45 carbon steel, and the surface of the gear matrix is provided with a composite coating. The composite coating comprises 20 first coating layers and 20 second coating layers which are alternately superposed, and the thickness of each single layer of the first coating layer and the second coating layer is 100 nm. In the first coating, the atomic percent of Zr element is 50%, the atomic percent of Ag element is 25%, the atomic percent of Ta element is 5% and the atomic percent of C element is 20%. In the second coating, the atomic percent of Mo element is 25%, the atomic percent of Te element is 50%, the atomic percent of V element is 15%, and the atomic percent of C element is 10%.
Example 2
Step 1, sequentially putting a gear matrix into alcohol and acetone for ultrasonic cleaning for 30min respectively, removing surface oil stain pollutants, fully drying by adopting a vacuum drying oven, quickly putting into a vacuum chamber of a coating machine, heating to 300 ℃ and keeping the temperature for 40min, wherein the background vacuum of the vacuum chamber is 8.0 multiplied by 10 < -3 > Pa;
step 2, introducing Ar gas, starting a bias voltage power supply with the voltage of 900V and the duty ratio of 0.3 under the pressure of 2.5Pa, and carrying out glow discharge cleaning for 30 min; reducing the bias voltage to 500V, starting ion source ion cleaning for 30min, starting an arc source Zr target, wherein the bias voltage is 500V, the target current is 60A, and the ion bombards the Zr target for 1.0 min;
step 3, adjusting the working air pressure to be 2.0Pa, the bias voltage to be 250V, adjusting the Zr target current to be 120A, starting the Ag target, adjusting the target current to be 100A, starting the TaC arc power supply, adjusting the target current to be 120A, and depositing the ZrAgTaC coating for 3 min;
step 4, closing the Zr target, the Ag target and the TaC target, adjusting the working air pressure to be 2.0Pa, adjusting the bias voltage to be 400V, and opening MoTe2Target and VC target arc Power supply, MoTe2The target current is 120A, the VC target current is 90A, and the MoTeVC coating is deposited for 3 min;
and 5, repeating the steps 3 and 4 until the total thickness of the composite coating is 10 micrometers, closing all the targets, the bias power supply and the gas source, and preserving heat for 60min to obtain the wide-temperature-range self-lubricating gear.
According to the prepared wide-temperature-range self-lubricating gear, the material of the gear substrate is 1Cr18Ni9 stainless steel, and the surface of the gear substrate material is provided with a composite coating. The composite coating layer comprises 100 first coating layers and 100 second coating layers which are alternately stacked, and the thickness of each single layer of the first coating layers and the second coating layers is 50 nm. In the first coating, the atomic percent of Zr element is 35%, the atomic percent of Ag element is 20%, the atomic percent of Ta element is 15% and the atomic percent of C element is 30%. In the second coating, the atomic percent of Mo element is 20%, the atomic percent of Te element is 40%, the atomic percent of V element is 20%, and the atomic percent of C element is 20%.
Example 3
Step 1, sequentially putting a gear matrix into alcohol and acetone for ultrasonic cleaning for 10min respectively to remove surface oil stain pollutants, fully drying the gear matrix by adopting a vacuum drying oven, quickly putting the gear matrix into a vacuum chamber of a film coating machine, heating the gear matrix to 150 ℃ and keeping the temperature for 35min, wherein the background vacuum of the vacuum chamber is 7.5 multiplied by 10 < -3 > Pa;
step 2, introducing Ar gas, starting a bias voltage power supply with the voltage of 700V and the duty ratio of 0.25 under the pressure of 0.5Pa, and carrying out glow discharge cleaning for 25 min; reducing the bias voltage to 250V, starting ion source ion cleaning for 20min, starting an arc source Zr target, wherein the bias voltage is 300V, the target current is 50A, and the ion bombards the Zr target for 0.5 min;
step 3, adjusting the working air pressure to be 2.0Pa, the bias voltage to be 150V, adjusting the Zr target current to be 100A, starting the Ag target, adjusting the target current to be 80A, starting the TaC arc power supply, adjusting the target current to be 90A, and depositing the ZrAgTaC coating for 8 min;
step 4, closing the Zr target, the Ag target and the TaC target, adjusting the working air pressure to be 1.5Pa, adjusting the bias voltage to be 300V, and opening MoTe2Target and VC target arc Power supply, MoTe2The target current is 100A, the VC target current is 70A, and the MoTeVC coating is deposited for 10 min;
and 5, repeating the steps 3 and 4 until the total thickness of the composite coating is 2 microns, closing all the targets, the bias power supply and the gas source, and preserving heat for 30min to obtain the wide-temperature-range self-lubricating gear.
According to the prepared wide-temperature-range self-lubricating gear, the material of the gear matrix is 45 carbon steel, and the surface of the gear matrix is provided with a composite coating. The composite coating comprises 10 first coating layers and 10 second coating layers which are alternately stacked, and the thickness of each single layer of the first coating layer and the second coating layer is 100 nm. In the first coating, the atomic percent of Zr element is 30%, the atomic percent of Ag element is 15%, the atomic percent of Ta element is 15% and the atomic percent of C element is 40%. In the second coating, the atomic percent of Mo element is 25%, the atomic percent of Te element is 45%, the atomic percent of V element is 10%, and the atomic percent of C element is 20%.
Example 4
Step 1, sequentially putting a gear matrix into alcohol and acetone for ultrasonic cleaning for 30min respectively, removing surface oil stain pollutants, fully drying by adopting a vacuum drying oven, quickly putting into a vacuum chamber of a coating machine, heating to 300 ℃ and keeping the temperature for 40min, wherein the background vacuum of the vacuum chamber is 8.0 multiplied by 10 < -3 > Pa;
step 2, introducing Ar gas, starting a bias voltage power supply with the voltage of 1000V and the duty ratio of 0.3 under the pressure of 3.0Pa, and carrying out glow discharge cleaning for 30 min; reducing the bias voltage to 500V, starting ion source ion cleaning for 30min, starting an arc source Zr target, wherein the bias voltage is 500V, the target current is 60A, and the ion bombards the Zr target for 1.0 min;
step 3, adjusting the working air pressure to be 2.0Pa, the bias voltage to be 250V, adjusting the Zr target current to be 120A, starting the Ag target, adjusting the target current to be 100A, starting the TaC arc power supply, adjusting the target current to be 120A, and depositing the ZrAgTaC coating for 3 min;
step 4, closing the Zr target, the Ag target and the TaC target, adjusting the working air pressure to be 2.0Pa, adjusting the bias voltage to be 400V, and opening MoTe2Target and VC target arc Power supply, MoTe2The target current is 120A, the VC target current is 90A, and the MoTeVC coating is deposited for 3 min;
and 5, repeating the steps 3 and 4 until the total thickness of the composite coating is 100 mu m, closing all the targets, the bias power supply and the gas source, and preserving heat for 60min to obtain the wide-temperature-range self-lubricating gear.
According to the prepared wide-temperature-range self-lubricating gear, the material of the gear substrate is 1Cr18Ni9 stainless steel, and the surface of the gear substrate material is provided with a composite coating. The composite coating comprises 1000 first coating layers and 1000 second coating layers which are alternately stacked, and the thickness of each single layer of the first coating layers and the second coating layers is 50 nm. In the first coating, the atomic percent of Zr element is 40%, the atomic percent of Ag element is 20%, the atomic percent of Ta element is 10% and the atomic percent of C element is 30%. In the second coating, the atomic percent of Mo element is 27%, the atomic percent of Te element is 40%, the atomic percent of V element is 18%, and the atomic percent of C element is 15%.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is also intended to be covered by the appended claims. The scope of the invention is defined by the claims and their equivalents.

Claims (7)

1. A wide temperature range self-lubricating gear is characterized by comprising a gear base body (1) and a composite coating, wherein the composite coating is deposited on the surface of the gear base body (1); the composite coating comprises a first coating (21) and a second coating (22), wherein the first coating (21) and the second coating (22) are alternately superposed; the first coating (21) is a ZrAgTaC layer, and the second coating (22) is a MoTeVC layer.
2. The wide temperature range self-lubricating gear according to claim 1, wherein the composite coating comprises at least 10 first coating layers (21) and at least 10 second coating layers (22), and the thickness of each of the first coating layers (21) and the second coating layers (22) is less than or equal to 100 nm.
3. The wide temperature range self-lubricating gear according to claim 1, wherein in the first coating layer (21), the atomic percent of Zr element is 30-50%, the atomic percent of Ag element is 15-25%, the atomic percent of Ta element is 5-15%, the atomic percent of C element is 20-40%, and the sum of the atomic percent of Zr element, Ag element, Ta element and C element is 100%.
4. Self-lubricating gear according to claim 1, characterised in that in the second coating (22) the atomic percentage of the element Mo is 20-25%, the atomic percentage of the element Te is 40-50%, the atomic percentage of the element V is 10-20%, the atomic percentage of the element C is 10-20%, and the sum of the atomic percentages of the element Mo, the element Te, the element V and the element C is 100%.
5. The wide temperature range self-lubricating gear of claim 1, wherein the gear base is made of carbon steel or stainless steel.
6. A method for preparing a wide temperature range self-lubricating gear according to any one of claims 1 to 5, comprising the steps of:
step 1, pretreatment: sequentially placing the gear matrix (1) into alcohol and acetone, ultrasonic cleaning for 20-30min respectively, removing surface oil stain pollutants, fully drying with vacuum drying oven, rapidly placing into vacuum chamber of film plating machine with background vacuum of 7.0 × 10-3Heating to-8.0 × 10-3Pa, heating to 150-;
step 2, ion cleaning: 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 an ion source for ion cleaning for 20-30min, starting an 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;
and 3, depositing a first coating (21): adjusting the working air pressure to be 0.5-2.0Pa, the bias voltage to be 100-250V, adjusting the Zr target current to be 80-150A, starting the Ag target, adjusting the target current to be 80-100A, starting the TaC arc power supply, adjusting the target current to be 80-150A, and depositing the first coating for 2-10 min;
and 4, depositing a second coating (22): closing the Zr target, the Ag target and the TaC target, adjusting the working pressure to 0.8-2.5Pa and the bias pressure to 300-400V, turn on MoTe2Target and VC target arc power supply, MoTe2 target current is 100-120A, VC target current is 60-90A, second coating is deposited for 2-10 min;
and 5, repeating the steps 3 and 4 until the total thickness of the composite coating is the preset thickness, closing all the targets, the bias power supply and the gas source, and preserving heat for 30-60min to obtain the wide-temperature-range self-lubricating gear.
7. The method according to claim 6, wherein the predetermined thickness is 2 to 100 μm.
CN202011402773.4A 2020-12-02 2020-12-02 Wide-temperature-range self-lubricating gear and preparation method thereof Pending CN112725731A (en)

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CN110158044A (en) * 2019-05-13 2019-08-23 东南大学 A kind of multiple elements design gradient coating cutter and preparation method thereof
CN110306190A (en) * 2019-06-13 2019-10-08 东南大学 A multi-component nano-gradient coating tool and its preparation method
CN111286701A (en) * 2018-12-07 2020-06-16 中国科学院宁波材料技术与工程研究所 A wide temperature range wear-resistant lubricating coating and its preparation method and application

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Publication number Priority date Publication date Assignee Title
CN104846340A (en) * 2015-05-29 2015-08-19 山东大学 Mo-S-N-Cr self-lubricating gradient-coated cutting tool and preparation process thereof
CN106811725A (en) * 2015-11-27 2017-06-09 中国科学院宁波材料技术与工程研究所 Temperature range self adaptation lubricant coating wide and preparation method and application
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