Micro-texture self-adaptive lubricating gear and preparation method thereof
阅读说明：本技术 一种微织构自适应润滑齿轮及其制备方法 (Micro-texture self-adaptive lubricating gear and preparation method thereof ) 是由 邢佑强 刘磊 吴泽 谢明江 于 2020-11-26 设计创作，主要内容包括：本发明提供一种微织构自适应润滑齿轮及其制备方法,具有良好的韧性,工作表面具有高硬度和耐磨性,在宽温域工作范围内具有良好的自润滑功效。本发明实施例的微织构自适应润滑齿轮,包括齿轮基体和Si-3N-4基陶瓷自适应润滑涂层,Si-3N-4基陶瓷自适应润滑涂层设置在齿轮基体的表面,Si-3N-4基陶瓷自适应润滑涂层的表面设有微织构。工作温度较低时,Si-3N-4基陶瓷自适应润滑涂层中的石墨烯能够起到润滑作用,温度较高时,Mo、ZnO、V和Ag会发生原位反应,生成具有润滑效应的ZnMoO-4、Ag-2MoO-4和V-2O-5化合物,使得齿轮能够适应高温下传动,起到良好的自适应润滑功效,从而减小摩擦磨损,提高齿轮寿命。(The invention provides a micro-texture self-adaptive lubricating gear and a preparation method thereof, wherein the micro-texture self-adaptive lubricating gear has good toughness, a working surface has high hardness and wear resistance, and the self-lubricating effect is good in a wide temperature range working range. The microtextured self-adaptive lubricating gear comprises a gear matrix and Si 3 N 4 Based on ceramic self-adapting lubricating coatings, Si 3 N 4 The self-adaptive lubricating ceramic-based coating is arranged on the surface of the gear matrix, and Si 3 N 4 The surface of the base ceramic self-adaptive lubricating coating is provided with a micro texture. At lower working temperatures, Si 3 N 4 Graphene in the self-adaptive lubricating coating of the base ceramic can play a role in lubrication, and Mo, ZnO, V and Ag can react in situ at a higher temperature to generate ZnMoO with a lubricating effect 4 、Ag 2 MoO 4 And V 2 O 5 The compound enables the gear to adapt to transmission at high temperature, and has good self-adaptive lubricating effect, thereby reducing friction and wear and prolonging the service life of the gear.)
1. A micro-texture self-adaptive lubricating gear is characterized by comprising a gear matrix (1) and Si3N4Based on a ceramic self-adaptive lubricating coating (2), said Si3N4A ceramic-based self-adaptive lubricating coating (2) is arranged on the surface of the gear matrix (1), and Si is arranged on the surface of the gear matrix3N4The surface of the base ceramic self-adaptive lubricating coating (2) is provided with a microtexture (3).
2. The microtextured, adaptive-lubricated gear according to claim 1, wherein the Si is3N4The ceramic-based self-adaptive lubricating coating (2) is made of Si3N4The base ceramic mixed powder is formed by cladding through a laser cladding technology; said Si3N4The base ceramic mixed powder is prepared from graphene, ZnO, Mo, V, Ag, BNNTs, CNFs and Si3N4Ni60A and WC.
3. The microtextured, adaptive-lubricated gear according to claim 2, wherein the Si is3N4In the base ceramic mixed powder, the mass percent of graphene is 5-8%, the mass percent of ZnO is 3-6%, the mass percent of Mo is 3-6%, the mass percent of V is 3-6%, the mass percent of Ag is 3-6%, the mass percent of BNNTs is 2-5%, the mass percent of CNFs is 2-5%, and the mass percent of Si is 2-5%3N4The weight percentage of the alloy is 20-30%, the weight percentage of Ni60A is 30-40%, the weight percentage of WC is 10-15%, and the sum of the weight percentages of all the components is 100%.
4. The microtextured self-adapting lubricated gear according to claim 1, characterized in that the gear base body (1) is made of medium carbon steel.
5. A method of making a microtextured, self-adapting lubricated gear according to any one of claims 1 to 4, comprising the steps of:
step 10, adopting a laser cladding technology to carry out laser cladding on graphene, ZnO, Mo, V, Ag and BNNTSi of s and CNFs3N4The base ceramic mixed powder is cladded on the surface of the gear matrix (1) to form Si3N4The ceramic-based self-adaptive lubricating coating (2) is prepared by adopting a synchronous powder feeding mode in the cladding process;
step 20, adopting laser processing technology to process Si3N4Preparing a microtexture (3) on the surface of the base ceramic self-adaptive lubricating coating (2);
and step 30, obtaining the microtextured self-adaptive lubricating gear.
6. The method according to claim 5, wherein the step 10 comprises:
step 11, pretreatment: sequentially placing the gear matrix (1) in an alcohol and acetone solution for ultrasonic cleaning for 10-20min respectively, and performing degreasing treatment;
step 12, configuring Si3N4Base ceramic mixed powder: si3N4The base ceramic mixed powder comprises the following components in percentage by mass: ni60A 30-40%, Si3N420-30% of WC (wolfram carbide), 10-15% of WC (wolfram carbide), 5-8% of graphene, 3-6% of ZnO, 3-6% of Mo, 3-6% of V, 3-6% of Ag, 2-5% of BNNTs and 2-5% of CNFs;
step 13, cladding Si3N4Base ceramic adaptive lubricating coating (2): prepared Si3N4Filling the base ceramic mixed powder into a powder feeder, and adjusting the powder feeding rate of the powder feeder to be 5-30 g/s; si is coated by laser cladding technology3N4The base ceramic mixed powder is cladded on the surface of the gear matrix (1) to form Si3N4The thickness of the base ceramic self-adaptive lubricating coating (2) is 3-10 mm;
wherein, the cladding process is carried out by adopting a synchronous powder feeding mode; laser cladding process parameters: the power is 5-20kW, the diameter of a light spot is 2-5mm, the scanning speed is 2-50mm/s, and the bridging rate is 20-50%; ar gas is adopted for both powder feeding gas and protective gas, and the flow rate of the Ar gas is 30-50L/min;
step 14, post-processing: si obtained in step 133N4The surface of the ceramic-based self-adaptive lubricating coating (2) is ground finished so that Si3N4Self-adaptive base ceramic bodyThe total thickness of the sliding coating (2) is 1-8 mm.
7. The preparation method according to claim 5, wherein the step 20 specifically comprises:
si obtained in step 10 using a nanolaser3N4Processing a micro texture (3) on the surface of the base ceramic self-adaptive lubricating coating (2), wherein the width of the micro texture (3) is 20-200 mu m, and the depth of the micro texture (3) is 5-200 mu m;
wherein, the laser processing parameters are as follows: the power is 5-50W, the spot diameter is 10-15 μm, the frequency is 10-20kHz, and the processing speed is 2-200 mm/s.
Technical Field
The invention relates to the technical field of gear manufacturing, in particular to a micro-texture self-adaptive lubricating gear and a preparation method thereof.
Background
The gear transmission is a transmission mechanism which is very commonly used in industry, however, in the gear transmission process, large friction abrasion exists between tooth surfaces, and the service life of the gear is directly reduced. Therefore, it is an effective way to improve the lubrication performance of gears to reduce the frictional wear between tooth surfaces, thereby extending the life of gears. At present, the lubrication mode of gear transmission mainly adopts oil lubrication and grease lubrication, the oil lubrication needs an oil tank or a lubrication system, the structure is complex, and lubricating oil is difficult to enter a friction contact interface under a high-temperature and high-pressure state to form an effective lubricating film. Grease lubrication is only suitable for applications with low rotational speed and temperature. Friction and lubrication in the gear transmission process become difficult problems to be solved urgently in the gear industry; for this reason, a series of self-lubricating gears have been developed in recent years.
Chinese patent application No. CN201810145366.6 discloses a multi-material composite self-lubricating gear, which is prepared by a 3D printing technology on the surface of a gear matrix to form a self-lubricating coating, thereby realizing the self-lubricating function of the gear. The Chinese patent application No. CN201711395397.9 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. CN201710086850.1 discloses a honeycomb-shaped polygonal self-lubricating gear, wherein honeycomb-shaped grooves and strip-shaped grooves are processed on the surface of the gear based on bionics, and a solid lubricant is filled in the bionic grooves to realize the self-lubricating effect of gear meshing.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a wide temperature range self-lubricating gear and a preparation method thereof, the whole gear has good toughness, and the working surface has Si3N4Based on ceramic self-adaptive lubricating coating, and has high hardness, toughness and wear resistance, Si3N4The surface of the self-adaptive lubricating coating of the base ceramic has a micro texture; the gear can realize continuous self-adaptive lubrication in the working process, and the micro-texture can collect abrasive dust and store a lubricant; microtexturing with Si3N4The combination of the ceramic-based self-adaptive lubricating coating can effectively reduce friction and wear and prolong the service life of the gear.
In order to solve the technical problems, the invention provides a micro-texture self-adaptive lubricating gear which comprises a gear matrix and Si3N4Based on a ceramic self-adaptive lubricating coating, said Si3N4A ceramic-based self-adaptive lubricating coating is arranged on the surface of the gear matrix, and Si is3N4The surface of the base ceramic self-adaptive lubricating coating is provided with a micro texture.
As a further improvement of an embodiment of the present invention, said Si3N4The self-adaptive lubricating coating of the base ceramic is made of Si3N4Forming base ceramic mixed powder by cladding, wherein the cladding mode adopts laser cladding; said Si3N4The base ceramic mixed powder is prepared from graphene, ZnO, Mo, V, Ag, BNNTs, CNFs and Si3N4Ni60A and WC.
As a further improvement of an embodiment of the present invention, said Si3N4In the base ceramic mixed powder, the mass percent of graphene is 5-8%, the mass percent of ZnO is 3-6%, the mass percent of Mo is 3-6%, the mass percent of V is 3-6%, the mass percent of Ag is 3-6%, the mass percent of BNNTs is 2-5%, the mass percent of CNFs is 2-5%, and the mass percent of Si is 2-5%3N4The weight percentage of the alloy is 20-30%, the weight percentage of Ni60A is 30-40%, the weight percentage of WC is 10-15%, and the sum of the weight percentages of all the components is 100%.
As a further improvement of an embodiment of the invention, the gear base body is made of medium carbon steel.
On the other hand, the embodiment of the invention also provides a preparation method for preparing the microtextured self-adaptive lubricating gear, which comprises the following steps:
step 10, adopting a laser cladding technology to clad Si containing graphene, ZnO, Mo, V, Ag, BNNTs and CNFs3N4The base ceramic mixed powder is cladded on the surface of the gear matrix to form Si3N4The ceramic self-adaptive lubricating coating is used, and the cladding process is carried out by adopting a synchronous powder feeding mode;
step 20, adopting laser processing technology to process Si3N4Preparing a micro texture on the surface of the base ceramic self-adaptive lubricating coating;
and step 30, obtaining the microtextured self-adaptive lubricating gear.
As a further improvement of the embodiment of the present invention, the step 10 specifically includes:
step 11, pretreatment: sequentially placing the gear matrix in alcohol and acetone solution, ultrasonically cleaning for 10-20min respectively, and performing degreasing treatment;
step 12, configuring Si3N4Base ceramic mixed powder: si3N4The base ceramic mixed powder comprises the following components in percentage by mass: ni60A 30-40%, Si3N420-30% of WC (wolfram carbide), 10-15% of WC (wolfram carbide), 5-8% of graphene, 3-6% of ZnO, 3-6% of Mo, 3-6% of V, 3-6% of Ag, 2-5% of BNNTs and 2-5% of CNFs;
step 13, cladding Si3N4The self-adaptive lubricating coating of the base ceramic: prepared Si3N4Filling the base ceramic mixed powder into a powder feeder, and adjusting the powder feeding rate of the powder feeder to be 5-30 g/s; si is coated by laser cladding technology3N4The base ceramic mixed powder is cladded on the surface of the gear matrix to form Si3N4The thickness of the base ceramic self-adaptive lubricating coating is 3-10 mm;
wherein, the cladding process is carried out by adopting a synchronous powder feeding mode; laser cladding process parameters: the power is 5-20kW, the diameter of a light spot is 2-5mm, the scanning speed is 2-50mm/s, and the bridging rate is 20-50%; ar gas is adopted for both powder feeding gas and protective gas, and the flow rate of the Ar gas is 30-50L/min;
step 14, post-processing: si obtained in step 133N4The surface of the ceramic-based self-adaptive lubricating coating is ground and finished to enable Si3N4The total thickness of the self-adaptive lubricating coating of the base ceramic is 1-8 mm.
As a further improvement of the embodiment of the present invention, the step 20 specifically includes:
si obtained in step 10 using a nanolaser3N4Processing a micro texture on the surface of the self-adaptive lubricating coating of the base ceramic, wherein the width of the micro texture is 20-200 mu m, and the depth of the micro texture is 5-200 mu m;
wherein, the laser processing parameters are as follows: the power is 5-50W, the spot diameter is 10-15 μm, the frequency is 10-20kHz, and the processing speed is 2-200 mm/s.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the gear provided by the embodiment of the invention has good toughness, the working surface has high hardness and wear resistance, and the gear has good self-lubricating effect in a wide temperature range working range. In the working process, when the temperature is lower, Si3N4Graphene in the self-adaptive lubricating coating of the base ceramic can play a role in lubrication, and Mo, ZnO, V and Ag can react in situ at a higher temperature to generate ZnMoO with a lubricating effect4、Ag2MoO4And V2O5The compound enables the gear to be suitable for transmission at high temperature, and has good self-adaptive lubricating effect, so that frictional wear is reduced, and the service life of the gear is prolonged. In the embodiment of the invention, Si on the surface of the gear substrate3N4In the ceramic-based self-adaptive lubricating coating, BNNTs and CNFs can increase the heat dissipation capacity of the gear interface and the surface and improve Si3N4The base ceramic self-adaptive lubricating coating has toughness, strength and wear resistance. In Si3N4The surface of the self-adaptive lubricating coating of the base ceramic is provided with the micro-texture, the micro-texture can collect abrasive dust, reduce abrasive wear, and combine the micro-texture with Si3N4The ceramic-based self-adaptive lubricating coating is combined, the micro texture can store the lubricant obtained by high-temperature reaction, secondary lubrication is improved, friction and wear are effectively reduced, and the service life of the gear is prolongedIts life is long. Si of the inventive gears3N4The ceramic-based self-adaptive lubricating coating is prepared by adopting a laser cladding method, the micro-texture is prepared by adopting nano laser processing, the preparation efficiency is high, and Si3N4The ceramic-based self-adaptive lubricating coating has strong bonding strength with a gear matrix.
Drawings
Fig. 1 is a schematic structural diagram of a microtextured self-adaptive lubricating gear according to an embodiment of the present invention.
In the figure: gear base 1, Si3N4A base ceramic self-adaptive lubricating coating 2 and a micro texture 3.
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 micro-texture self-adaptive lubricating gear, which comprises a gear matrix 1 and Si as shown in figure 13N4Base ceramic self-adaptive lubricating coating 2, Si3N4The self-adaptive lubricating coating 2 based on ceramic is arranged on the surface of the gear matrix 1, and Si3N4The surface of the base ceramic self-adaptive lubricating coating is provided with a micro texture 3. Si3N4The base ceramic self-adaptive lubricating coating 2 is made of Si3N4The base ceramic mixed powder is formed by cladding by adopting a laser cladding technology, and Si3N4The base ceramic mixed powder is prepared from graphene, ZnO, Mo, V, Ag, BNNTs, CNFs and Si3N4Ni60A and WC.
The gear provided by the embodiment of the invention has good toughness, the working surface has high hardness and wear resistance, and the gear has good self-lubricating effect in a wide temperature range working range. In the working process, when the temperature is lower, Si3N4Graphene in the self-adaptive lubricating coating of the base ceramic can play a role in lubrication, and Mo, ZnO, V and Ag can react in situ at a higher temperature to generate ZnMoO with a lubricating effect4、Ag2MoO4And V2O5The compound enables the gear to be suitable for transmission at high temperature, and has good self-adaptive lubricating effect, so that frictional wear is reduced, and the service life of the gear is prolonged. Examples of the inventionSi of gear base surface3N4In the ceramic-based self-adaptive lubricating coating, BNNTs and CNFs can increase the heat dissipation capacity of the gear interface and the surface and improve Si3N4The base ceramic self-adaptive lubricating coating has toughness, strength and wear resistance. In Si3N4The surface of the self-adaptive lubricating coating of the base ceramic is provided with the micro-texture, the micro-texture can collect abrasive dust, reduce abrasive wear, and combine the micro-texture with Si3N4The ceramic-based self-adaptive lubricating coating is combined, the micro-texture can store the lubricant obtained by high-temperature reaction, secondary lubrication is improved, friction and wear are effectively reduced, and the service life of the gear is prolonged.
Preferably, Si3N4In the base ceramic mixed powder, the mass percent of graphene is 5-8%, the mass percent of ZnO is 3-6%, the mass percent of Mo is 3-6%, the mass percent of V is 3-6%, the mass percent of Ag is 3-6%, the mass percent of BNNTs is 2-5%, the mass percent of CNFs is 2-5%, and the mass percent of Si is 2-5%3N420-30% of Ni60A, 30-40% of WC, and 10-15% of WC.
Preferably, the gear base body 1 is made of medium carbon steel.
The embodiment of the invention also provides a preparation method of the microtexture self-adaptive lubricating gear, which comprises the following steps:
step 10, adopting a laser cladding technology to clad Si containing graphene, ZnO, Mo, V, Ag, BNNTs and CNFs3N4The base ceramic mixed powder is cladded on the surface of a gear matrix to form a Si3N4 base ceramic self-adaptive lubricating coating, and the cladding process is carried out by adopting a synchronous powder feeding mode;
step 20, adopting laser processing technology to process Si3N4Preparing a micro texture on the surface of the self-adaptive lubricating coating of the base ceramic;
and step 30, obtaining the microtextured self-adaptive lubricating gear.
Preferably, step 10 specifically includes:
step 11, pretreatment: sequentially placing the gear matrix in alcohol and acetone solution, ultrasonically cleaning for 10-20min respectively, and performing degreasing treatment;
step 12, configuring Si3N4Base ceramic mixed powder: si3N4The base ceramic mixed powder comprises the following components in percentage by mass: ni60A 30-40%, Si3N420-30% of WC (wolfram carbide), 10-15% of WC (wolfram carbide), 5-8% of graphene, 3-6% of ZnO, 3-6% of Mo, 3-6% of V, 3-6% of Ag, 2-5% of BNNTs and 2-5% of CNFs;
step 13, cladding Si3N4The self-adaptive lubricating coating of the base ceramic: prepared Si3N4Filling the base ceramic mixed powder into a powder feeder, and adjusting the powder feeding rate of the powder feeder to be 5-30 g/s; si is coated by laser cladding technology3N4The base ceramic mixed powder is cladded on the surface of the gear matrix (1), and the cladding process is carried out by adopting a synchronous powder feeding mode; laser cladding process parameters: the power is 5-20kW, the diameter of a light spot is 2-5mm, the scanning speed is 2-50mm/s, and the bridging rate is 20-50%; ar gas is adopted for both powder feeding gas and protective gas, and the flow rate of the Ar gas is 30-50L/min; formation of Si3N4The thickness of the base ceramic self-adaptive lubricating coating is 3-10 mm;
step 14, post-processing: si obtained in step 133N4The surface of the ceramic-based self-adaptive lubricating coating is ground and finished to enable Si3N4The total thickness of the self-adaptive lubricating coating of the base ceramic is 1-8 mm.
Preferably, step 20 specifically includes:
si obtained in step 10 using a nanolaser3N4Processing a micro texture on the surface of the self-adaptive lubricating coating of the base ceramic, wherein the width of the micro texture is 20-200 mu m, and the depth of the micro texture is 5-200 mu m; laser processing parameters: the power is 5-50W, the spot diameter is 10-15 μm, the frequency is 10-20kHz, and the processing speed is 2-200 mm/s.
Method of the embodiments of the invention, Si3N4The ceramic-based self-adaptive lubricating coating is prepared by adopting a laser cladding method, the micro-texture is prepared by adopting nano laser processing, the preparation efficiency is high, and Si3N4The ceramic-based self-adaptive lubricating coating has strong bonding strength with a gear matrix. The prepared gear has good toughness, high hardness and wear resistance of the working surface and wide temperature rangeGood self-lubricating effect.
Example 1
And sequentially placing the gear matrix made of 40Cr in alcohol and acetone solution for ultrasonic cleaning for 10min respectively, and performing degreasing treatment. Configuration Si3N4Base ceramic mixed powder, Si3N4The base ceramic mixed powder comprises the following components in percentage by weight: 33% Ni60A, 30% Si3N410% WC, 5% graphene, 4% ZnO, 4% Mo, 3% V, 3% Ag, 4% BNNTs and 4% CNFs. Prepared Si3N4Filling the base ceramic mixed powder into a powder feeder, and adjusting the powder feeding rate of the powder feeder to be 10 g/s; cladding the mixed powder on the surface of the gear matrix by adopting a laser cladding technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; the laser cladding process parameters are as follows: the power is 5kW, the diameter of a light spot is 2mm, the scanning speed is 2mm/s, and the bridging rate is 20%; ar gas is adopted for both powder feeding gas and protective gas, and the flow rate of the Ar gas is 30L/min; to obtain Si3N4The thickness of the self-adaptive lubricating coating of the base ceramic is 3 mm. Mixing Si3N4The surface of the ceramic-based adaptive lubricating coating was abrasive finished so that the total thickness of the coating was 1 mm. By using nano laser on Si3N4Processing a micro texture on the surface of the self-adaptive lubricating coating of the base ceramic, wherein the width of the micro texture is 50 mu m, and the depth of the micro texture is 50 mu m; the laser processing parameters are as follows: the power is 10W, the spot diameter is 12 μm, the frequency is 10kHz, and the processing speed is 10 mm/s. Obtaining the micro-texture self-adaptive lubricating gear.
Example 2
Sequentially placing a gear matrix made of 40CrNi in an alcohol and acetone solution for ultrasonic cleaning for 20min respectively, and performing degreasing treatment; configuration Si3N4Base ceramic mixed powder, Si3N4The base ceramic mixed powder comprises the following components in percentage by weight: 40% Ni60A, 20% Si3N415% WC, 6% graphene, 3% ZnO, 3% Mo, 3% V, 4% Ag, 3% BNNTs and 3% CNFs. Prepared Si3N4Filling the base ceramic mixed powder into a powder feeder, and adjusting the powder feeding rate of the powder feeder to be 30 g/s; the mixed powder is cladded on the surface of the gear matrix by adopting a laser cladding technology, and the cladding process adopts synchronous powder feedingThe method is carried out; the laser cladding process parameters are as follows: the power is 15kW, the diameter of a light spot is 5mm, the scanning speed is 40mm/s, and the bridging rate is 50%; ar gas is adopted for both powder feeding gas and protective gas, and the flow rate of the Ar gas is 50L/min, so that Si is obtained3N4The thickness of the base ceramic self-adaptive lubricating coating is 10 mm. Mixing Si3N4The surface of the ceramic-based self-adaptive lubricating coating is ground and finished to enable Si3N4The total thickness of the base ceramic self-adaptive lubricating coating is 8 mm. By using nano laser on Si3N4Processing a micro texture on the surface of the self-adaptive lubricating coating of the base ceramic, wherein the width of the micro texture is 100 mu m, and the depth of the micro texture is 100 mu m; the laser processing parameters are as follows: the power is 50W, the spot diameter is 15 μm, the frequency is 20kHz, and the processing speed is 50 mm/s. Obtaining the micro-texture self-adaptive lubricating gear.
Example 3
Sequentially placing a gear matrix made of 40CrNi in an alcohol and acetone solution for ultrasonic cleaning for 20min respectively, and performing degreasing treatment; configuration Si3N4Base ceramic mixed powder, Si3N4The base ceramic mixed powder comprises the following components in percentage by weight: 30% Ni60A, 25% Si3N412% WC, 8% graphene, 4% ZnO, 3% Mo, 5% V, 6% Ag, 2% BNNTs and 5% CNFs. Prepared Si3N4Filling the base ceramic mixed powder into a powder feeder, and adjusting the powder feeding rate of the powder feeder to be 30 g/s; cladding the mixed powder on the surface of the gear matrix by adopting a laser cladding technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; the laser cladding process parameters are as follows: the power is 20kW, the diameter of a light spot is 3mm, the scanning speed is 50mm/s, and the bridging rate is 30%; ar gas is adopted for both powder feeding gas and protective gas, and the flow rate of the Ar gas is 40L/min, so that Si is obtained3N4The thickness of the base ceramic self-adaptive lubricating coating is 7 mm. Mixing Si3N4The surface of the ceramic-based self-adaptive lubricating coating is ground and finished to enable Si3N4The total thickness of the base ceramic self-adaptive lubricating coating is 5 mm. By using nano laser on Si3N4Processing a micro texture on the surface of the self-adaptive lubricating coating of the base ceramic, wherein the width of the micro texture is 20 mu m, and the depth of the micro texture is 5 mu m; the laser processing parameters are as follows: power 50W, spot diameter 15 μmFrequency 20kHz, processing speed 50 mm/s. Obtaining the micro-texture self-adaptive lubricating gear.
Example 4
Sequentially placing a gear matrix made of 40CrNi in an alcohol and acetone solution for ultrasonic cleaning for 20min respectively, and performing degreasing treatment; configuration Si3N4Base ceramic mixed powder, Si3N4The base ceramic mixed powder comprises the following components in percentage by weight: 35% Ni60A, 20% Si3N410% WC, 5% graphene, 6% ZnO, 6% Mo, 6% V, 5% Ag, 5% BNNTs and 2% CNFs. Prepared Si3N4Filling the base ceramic mixed powder into a powder feeder, and adjusting the powder feeding rate of the powder feeder to be 30 g/s; cladding the mixed powder on the surface of the gear matrix by adopting a laser cladding technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; the laser cladding process parameters are as follows: the power is 20kW, the diameter of a light spot is 3mm, the scanning speed is 50mm/s, and the bridging rate is 30%; ar gas is adopted for both powder feeding gas and protective gas, and the flow rate of the Ar gas is 40L/min, so that Si is obtained3N4The thickness of the base ceramic self-adaptive lubricating coating is 7 mm. Mixing Si3N4The surface of the ceramic-based self-adaptive lubricating coating is ground and finished to enable Si3N4The total thickness of the base ceramic self-adaptive lubricating coating is 5 mm. By using nano laser on Si3N4Processing a micro texture on the surface of the self-adaptive lubricating coating of the base ceramic, wherein the width of the micro texture is 200 mu m, and the depth of the micro texture is 200 mu m; the laser processing parameters are as follows: the power is 50W, the spot diameter is 15 μm, the frequency is 20kHz, and the processing speed is 50 mm/s. Obtaining the micro-texture self-adaptive lubricating gear.
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.