CN110343991B - Antifriction and antiwear self-lubricating coating bearing and preparation method thereof - Google Patents
Antifriction and antiwear self-lubricating coating bearing and preparation method thereof Download PDFInfo
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- CN110343991B CN110343991B CN201910511263.1A CN201910511263A CN110343991B CN 110343991 B CN110343991 B CN 110343991B CN 201910511263 A CN201910511263 A CN 201910511263A CN 110343991 B CN110343991 B CN 110343991B
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
Abstract
The invention discloses an antifriction and antiwear self-lubricating coatingA laminated bearing and a method for manufacturing the same. The bearing base material is bearing steel, the surface of the base body is sequentially provided with a gradient coating consisting of a hard alloy layer, a silicon nitride ceramic layer and a cubic boron nitride layer, and the gradient coating has a self-lubricating effect. The gradient coating is prepared by adopting a plasma spraying method. The bearing integrates the advantages of bearing steel, hard alloy, silicon nitride ceramic, cubic boron nitride and a gradient coating, and the hardness, wear resistance and toughness of the coating are improved by adding the Carbon Nanotubes (CNTs) and the Boron Nitride Nanotubes (BNNTs); the bearing has good toughness, high hardness and high wear resistance. In the working process, when the temperature is low, the graphene can play a role in lubrication, and PbO, Mo and TiB are used at high temperature2Can generate in-situ reaction to generate PbMoO with lubricating effect4、TiO2And B2O3Thereby reducing the friction and the abrasion of the bearing and prolonging the service life of the bearing.
Description
Technical Field
The invention belongs to the technical field of bearing manufacturing, and particularly relates to an antifriction and antiwear self-lubricating coating bearing and a preparation method thereof.
Background
The bearing is an important part in the modern mechanical equipment, the currently used more bearing materials are mostly metals, the surface hardness of the metal materials is relatively low, the friction coefficient is large, the bearing capacity is low, the abrasion is serious, and a lubricant is required to be used in the common working process; in order to reduce frictional wear, a series of novel self-lubricating bearings have been developed in recent years. The self-lubricating bearing means that the bearing material has the functions of lubrication and antifriction, and can realize the self-lubricating effect under the condition of no lubricating liquid, thereby reducing the surface friction and wear of the bearing.
Chinese patent "application number: CN201710541381.8 reports a self-lubricating bearing and a preparation method thereof, wherein a graphene/calcium fluoride/ceramic self-lubricating coating is prepared on the surface of a chromium-containing alloy steel bearing substrate by a laser cladding method, so that the self-lubricating function of the bearing is realized. Chinese patent "application number: CN201810655679.6 "reports a self-lubricating bearing filled with solidified solid lubricating material and its preparation method, wherein a hole is pre-processed on the surface of the bearing substrate, the hole is filled with solid lubricating agent, and the two are combined into a whole as the self-lubricating bearing after aging and solidification treatment. Chinese patent "application number: 201811564231.X "reports a method for preparing a powder metallurgy self-lubricating bearing by adding a powder lubricant to a bearing mixed powder and preparing the self-lubricating bearing by metallurgical sintering.
Disclosure of Invention
The purpose of the invention is as follows: the invention discloses an antifriction and antiwear self-lubricating coating bearing and a preparation method thereof.
The technical scheme is as follows: the antifriction and antiwear self-lubricating coating bearing is realized by the following modes:
the bearing base material is bearing steel, the surface of the base body is provided with a gradient self-lubricating coating consisting of a hard alloy layer, a silicon nitride ceramic layer and a cubic boron nitride layer, and the coating is prepared by sequentially cladding hard alloy mixed powder, silicon nitride ceramic mixed powder and cubic boron nitride mixed powder on the surface of the bearing base body by adopting a plasma spraying technology; the hard alloy mixed powder comprises the following components in percentage by weight: 55-65% of WC, 5-8% of TiC, 5-8% of Co, 1-2% of TaN, 15-25% of Ni60A, 2-4% of PbO, 2-4% of Mo and 2-4% of TiB20.5-1.5% of BNNTs, 0.5-1.5% of CNTs and 0.5-1.5% of graphene, wherein the sum of the weight percentages of the materials is 100%; the silicon nitride ceramic mixed powder comprises the following components in percentage by weight: 40-60% Si3N4、10-20％ZrO2、15-25％Ni60A、2-5％PbO、2-5％Mo、2-5％TiB20.5-2% of BNNTs, 0.5-2% of CNTs and 0.5-2% of graphene, wherein the sum of the weight percentages of the materials is 100%; the cubic boron nitride mixed powder comprises the following components in percentage by weight: 50-60% of CBN, 20-30% of Ni60A, 2-5% of PbO, 2-5% of Mo and 2-5% of TiB20.5-2% of BNNTs, 0.5-2% of CNTs and 0.5-2% of graphene, wherein the sum of the weight percentages of the materials is 100%.
The invention relates to an antifriction and antiwear self-lubricating coating bearing, which comprises the following concrete preparation steps:
(1) pretreatment: sequentially placing the bearing substrate in alcohol and acetone solution, ultrasonic cleaning for 20-30min respectively, and removing oil contamination;
(2) cladding a hard alloy layer: preparing hard alloy mixed powder, wherein the hard alloy mixed powder comprises the following main components in percentage by weight: 55-65% of WC, 5-8% of TiC, 5-8% of Co, 1-2% of TaN, 15-25% of Ni60A, 2-4% of PbO, 2-4% of Mo and 2-4% of TiB20.5-1.5% of BNNTs, 0.5-1.5% of CNTs and 0.5-1.5% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared hard alloy mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10-80g/cm3(ii) a Adopting a plasma spraying technology to clad the hard alloy mixed powder on the surface of the bearing matrix, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 20-80kW, the Ar gas flow is 20-80L/min, and H2The air flow is 10-60L/min, and the scanning speed is 2-50 mm/s;
(3) cladding a silicon nitride ceramic layer: preparing silicon nitride ceramic mixed powder, wherein the silicon nitride ceramic mixed powder comprises the following main components in percentage by weight: 40-60% Si3N4、10-20％ZrO2、15-25％Ni60A、2-5％PbO、2-5％Mo、2-5％TiB20.5-2% of BNNTs, 0.5-2% of CNTs and 0.5-2% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared silicon nitride ceramic mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10-80g/cm3(ii) a Cladding the silicon nitride ceramic mixed powder on the surface of the hard alloy layer by adopting a plasma spraying technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 20-80kW, the Ar gas flow is 20-80L/min, and H2The air flow is 10-60L/min, and the scanning speed is 2-50 mm/s;
(4) cladding the cubic boron nitride layer: preparing cubic boron nitride mixed powder, wherein the cubic boron nitride mixed powder comprises the following main components in percentage by weight: 50-60% of CBN, 20-30% of Ni60A, 2-5% of PbO, 2-5% of Mo and 2-5% of TiB20.5-2% of BNNTs, 0.5-2% of CNTs and 0.5-2% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared cubic nitrogenThe boron oxide mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10-80g/cm3(ii) a Cladding the cubic boron nitride mixed powder on the surface of the silicon nitride ceramic layer by adopting a plasma spraying technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 20-80kW, the Ar gas flow is 20-80L/min, and H2The air flow is 10-60L/min, and the scanning speed is 2-50 mm/s;
(5) and (3) post-treatment: and finishing the surface of the bearing after cladding is finished, so that the total thickness of the coating is 100-3000 mu m, and obtaining the self-lubricating coating bearing.
Compared with the prior art, the invention has the beneficial effects that:
1. the bearing has the advantages of bearing steel, hard alloy, silicon nitride-based ceramic, cubic boron nitride, CNTs and BNNTs, and has good toughness and high hardness; 2. in the working process, when the temperature is low, the graphene can play a role in lubrication, and PbO, Mo and TiB are used at high temperature2Can generate in-situ reaction to generate PbMoO with lubricating effect4、TiO2And B2O3The bearing has good self-lubricating effect at higher temperature, so that the friction and abrasion of the bearing can be reduced, and the service life of the bearing is prolonged; 3. the coating is prepared by adopting a plasma spraying method, the preparation efficiency of the method is high, and the coating and the matrix have stronger bonding strength; meanwhile, the coating can reach a great thickness and has a wide application prospect.
Drawings
FIG. 1 is a schematic structural view of a antifriction and antiwear self-lubricating coating bearing of the present invention, and FIG. 2 is a schematic sectional view of a deep groove ball bearing of the present invention; wherein: the bearing comprises a bearing base material 1, a hard alloy layer 2, a silicon nitride ceramic layer 3, a cubic boron nitride layer 4, an inner ring base body 5, an outer ring base body 6 and balls 7.
Detailed Description
Example 1:
the bearing base material is GCr15 bearing steel, the surface of the base body is provided with a gradient self-lubricating coating consisting of a hard alloy layer, a silicon nitride ceramic layer and a cubic boron nitride layer, and the coatingThe bearing is prepared by sequentially cladding hard alloy mixed powder, silicon nitride ceramic mixed powder and cubic boron nitride mixed powder on the surface of a bearing matrix by adopting a plasma spraying technology; the hard alloy mixed powder comprises the following components in percentage by weight: 55% of WC, 8% of TiC, 8% of Co, 1% of TaN, 20% of Ni60A, 2% of PbO, 2% of Mo and 2% of TiB20.5 percent of BNNTs, 0.5 percent of CNTs and 1 percent of graphene, wherein the sum of the weight percentages of the materials is 100 percent; the silicon nitride ceramic mixed powder comprises the following components in percentage by weight: 45% Si3N4、20％ZrO2、20％Ni60A、4％PbO、4％Mo、2％TiB 22% of BNNTs, 2% of CNTs and 1% of graphene, wherein the sum of the weight percentages of the materials is 100%; the cubic boron nitride mixed powder comprises the following components in percentage by weight: 55% CBN, 30% Ni60A, 4% PbO, 4% Mo, 2% TiB 22 percent of BNNTs, 2 percent of CNTs and 1 percent of graphene, wherein the sum of the weight percent of the materials is 100 percent.
The invention relates to an antifriction and antiwear self-lubricating coating bearing, which comprises the following concrete preparation steps:
(1) pretreatment: sequentially placing the bearing substrate in alcohol and acetone solution, ultrasonically cleaning for 20min respectively, and performing degreasing treatment;
(2) cladding a hard alloy layer: preparing hard alloy mixed powder, wherein the hard alloy mixed powder comprises the following main components in percentage by weight: 55% of WC, 8% of TiC, 8% of Co, 1% of TaN, 20% of Ni60A, 2% of PbO, 2% of Mo and 2% of TiB20.5 percent of BNNTs, 0.5 percent of CNTs and 1 percent of graphene, wherein the sum of the weight percentages of the materials is 100 percent; the prepared hard alloy mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10g/cm3(ii) a Adopting a plasma spraying technology to clad the hard alloy mixed powder on the surface of the bearing matrix, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: power 20kW, Ar gas flow 20L/min, H2The air flow is 20L/min, and the scanning speed is 2 mm/s;
(3) cladding a silicon nitride ceramic layer: preparing silicon nitride ceramic mixed powder, wherein the silicon nitride ceramic mixed powder comprises the following main components in percentage by weight: 45% Si3N4、20％ZrO2、20％Ni60A、4％PbO、4％Mo、2％TiB2、2％BNNTs、2% of CNTs and 1% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared silicon nitride ceramic mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10g/cm3(ii) a Cladding the silicon nitride ceramic mixed powder on the surface of the hard alloy layer by adopting a plasma spraying technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: power 20kW, Ar gas flow 20L/min, H2The air flow is 20L/min, and the scanning speed is 2 mm/s;
(4) cladding the cubic boron nitride layer: preparing cubic boron nitride mixed powder, wherein the cubic boron nitride mixed powder comprises the following main components in percentage by weight: 55% CBN, 30% Ni60A, 4% PbO, 4% Mo, 2% TiB 22% of BNNTs, 2% of CNTs and 1% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared cubic boron nitride mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10g/cm3(ii) a Cladding the cubic boron nitride mixed powder on the surface of the silicon nitride ceramic layer by adopting a plasma spraying technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: power 20kW, Ar gas flow 20L/min, H2The air flow is 20L/min, and the scanning speed is 2 mm/s;
(5) and (3) post-treatment: and finishing the surface of the bearing after cladding is finished to enable the total thickness of the coating to be 500 mu m, thus obtaining the self-lubricating coating bearing.
Example 2:
the bearing base material is 9Cr18 bearing steel, the surface of the base body is provided with a gradient self-lubricating coating consisting of a hard alloy layer, a silicon nitride ceramic layer and a cubic boron nitride layer, and the coating is prepared by sequentially cladding hard alloy mixed powder, silicon nitride ceramic mixed powder and cubic boron nitride mixed powder on the surface of the bearing base body by adopting a plasma spraying technology; the hard alloy mixed powder comprises the following components in percentage by weight: 60% WC, 5% TiC, 5% Co, 2% TaN, 16% Ni60A, 3% PbO, 3% Mo, 3% TiB 21% of BNNTs, 1% of CNTs and 1% of graphene, wherein the sum of the weight percentages of the materials is 100%; the silicon nitride ceramic mixed powder comprises the following components in percentage by weight: 55% Si3N4、15％ZrO2、16％Ni60A、3％PbO、3％Mo、3％TiB 22% of BNNTs, 2% of CNTs and 1% of graphene, wherein the sum of the weight percentages of the materials is 100%; the cubic boron nitride mixed powder comprises the following components in percentage by weight: 60% CBN, 25% Ni60A, 3% PbO, 3% Mo, 3% TiB 22% of BNNTs, 2% of CNTs and 2% of graphene, wherein the sum of the weight percentages of the materials is 100%.
The invention relates to an antifriction and antiwear self-lubricating coating bearing, which comprises the following concrete preparation steps:
(1) pretreatment: sequentially placing the bearing substrate in an alcohol and acetone solution for ultrasonic cleaning for 30min respectively, and performing degreasing treatment;
(2) cladding a hard alloy layer: preparing hard alloy mixed powder, wherein the hard alloy mixed powder comprises the following main components in percentage by weight: 60% WC, 5% TiC, 5% Co, 2% TaN, 16% Ni60A, 3% PbO, 3% Mo, 3% TiB 21% of BNNTs, 1% of CNTs and 1% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared hard alloy mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 80g/cm3(ii) a Adopting a plasma spraying technology to clad the hard alloy mixed powder on the surface of the bearing matrix, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 80kW, the Ar gas flow is 80L/min, and H is2The air flow is 60L/min, and the scanning speed is 50 mm/s;
(3) cladding a silicon nitride ceramic layer: preparing silicon nitride ceramic mixed powder, wherein the silicon nitride ceramic mixed powder comprises the following main components in percentage by weight: 55% Si3N4、15％ZrO2、16％Ni60A、3％PbO、3％Mo、3％TiB 22% of BNNTs, 2% of CNTs and 1% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared silicon nitride ceramic mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 80g/cm3(ii) a Cladding the silicon nitride ceramic mixed powder on the surface of the hard alloy layer by adopting a plasma spraying technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 80kW, the Ar gas flow is 80L/min, and H is2The air flow is 60L/min, and the scanning speed is 50 mm/s;
(4) cladding the cubic boron nitride layer: preparing cubic boron nitride mixed powderThe material comprises the following main components in percentage by weight: 60% CBN, 25% Ni60A, 3% PbO, 3% Mo, 3% TiB 22% of BNNTs, 2% of CNTs and 2% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared cubic boron nitride mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 80g/cm3(ii) a Cladding the cubic boron nitride mixed powder on the surface of the silicon nitride ceramic layer by adopting a plasma spraying technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 80kW, the Ar gas flow is 80L/min, and H is2The air flow is 60L/min, and the scanning speed is 50 mm/s;
(5) and (3) post-treatment: and finishing the surface of the bearing after cladding is finished to enable the total thickness of the coating to be 3000 microns, and obtaining the self-lubricating coating bearing.
Claims (2)
1. A antifriction and antiwear self-lubricating coating bearing is characterized in that: the bearing base material is bearing steel, the surface of the base body is provided with a gradient self-lubricating coating consisting of a hard alloy layer, a silicon nitride ceramic layer and a cubic boron nitride layer, and the coating is prepared by adopting a plasma spraying method; the preparation method comprises the steps of cladding the hard alloy mixed powder, the silicon nitride ceramic mixed powder and the cubic boron nitride mixed powder on the surface of a bearing matrix in sequence by adopting a plasma spraying technology to prepare the gradient self-lubricating coating; the hard alloy mixed powder comprises the following components in percentage by weight: 55-65% of WC, 5-8% of TiC, 5-8% of Co, 1-2% of TaN, 15-25% of Ni60A, 2-4% of PbO, 2-4% of Mo and 2-4% of TiB20.5-1.5% of BNNTs, 0.5-1.5% of CNTs and 0.5-1.5% of graphene, wherein the sum of the weight percentages of the materials is 100%; the silicon nitride ceramic mixed powder comprises the following components in percentage by weight: 40-60% Si3N4、10-20％ZrO2、15-25％Ni60A、2-5％PbO、2-5％Mo、2-5％TiB20.5-2% of BNNTs, 0.5-2% of CNTs and 0.5-2% of graphene, wherein the sum of the weight percentages of the materials is 100%; the cubic boron nitride mixed powder comprises the following components in percentage by weight: 50-60% of CBN, 20-30% of Ni60A, 2-5% of PbO, 2-5% of Mo and 2-5% of TiB20.5-2% of BNNTs, 0.5-2% of CNTs and 0.5-2% of graphene, wherein the sum of the weight percentages of the materials is 100%.
2. The antifriction and antiwear self-lubricating coated bearing of claim 1, further comprising the steps of:
(1) pretreatment: sequentially placing the bearing substrate in alcohol and acetone solution, ultrasonic cleaning for 20-30min respectively, and removing oil contamination;
(2) cladding a hard alloy layer: preparing hard alloy mixed powder, wherein the hard alloy mixed powder comprises the following main components in percentage by weight: 55-65% of WC, 5-8% of TiC, 5-8% of Co, 1-2% of TaN, 15-25% of Ni60A, 2-4% of PbO, 2-4% of Mo and 2-4% of TiB20.5-1.5% of BNNTs, 0.5-1.5% of CNTs and 0.5-1.5% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared hard alloy mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10-80g/cm3(ii) a Adopting a plasma spraying technology to clad the hard alloy mixed powder on the surface of the bearing matrix, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 20-80kW, the Ar gas flow is 20-80L/min, and H2The air flow is 10-60L/min, and the scanning speed is 2-50 mm/s;
(3) cladding a silicon nitride ceramic layer: preparing silicon nitride ceramic mixed powder, wherein the silicon nitride ceramic mixed powder comprises the following main components in percentage by weight: 40-60% Si3N4、10-20％ZrO2、15-25％Ni60A、2-5％PbO、2-5％Mo、2-5％TiB20.5-2% of BNNTs, 0.5-2% of CNTs and 0.5-2% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared silicon nitride ceramic mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10-80g/cm3(ii) a Cladding the silicon nitride ceramic mixed powder on the surface of the hard alloy layer by adopting a plasma spraying technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 20-80kW, the Ar gas flow is 20-80L/min, and H2The air flow is 10-60L/min, and the scanning speed is 2-50 mm/s;
(4) cladding the cubic boron nitride layer: preparing cubic boron nitride mixed powder, wherein the cubic boron nitride mixed powder comprises the following main components in percentage by weight: 50-60% of CBN, 20-30% of Ni60A, 2-5% of PbO, 2-5% of Mo and 2-5% of TiB2、0.5-2％BNNTs、0.5-2% of CNTs and 0.5-2% of graphene, wherein the sum of the weight percentages of the materials is 100%; the prepared cubic boron nitride mixed powder is filled into a powder feeder, and the powder feeding speed of the powder feeder is adjusted to 10-80g/cm3(ii) a Cladding the cubic boron nitride mixed powder on the surface of the silicon nitride ceramic layer by adopting a plasma spraying technology, wherein the cladding process is carried out by adopting a synchronous powder feeding mode; plasma processing parameters were as follows: the power is 20-80kW, the Ar gas flow is 20-80L/min, and H2The air flow is 10-60L/min, and the scanning speed is 2-50 mm/s;
(5) and (3) post-treatment: and finishing the surface of the bearing after cladding is finished, so that the total thickness of the coating is 100-3000 mu m, and obtaining the self-lubricating coating bearing.
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| JPS59174558A (en) * | 1983-03-24 | 1984-10-03 | タテホ化学工業株式会社 | Ceramic crosslinked formed body and manufacture |
| US7842403B2 (en) * | 2006-02-23 | 2010-11-30 | Atotech Deutschland Gmbh | Antifriction coatings, methods of producing such coatings and articles including such coatings |
| CN105603387B (en) * | 2016-02-11 | 2018-04-03 | 广东工业大学 | Boron nitride system composite coating, the gradient ultra-fine cemented carbide cutter with the composite coating and preparation method thereof |
| CN108300993A (en) * | 2018-01-26 | 2018-07-20 | 东南大学 | Silicon nitride-hard alloy gradient coating cutter and preparation method thereof |
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