CN116463534A - Ultralow-abrasion friction pair material - Google Patents
Ultralow-abrasion friction pair material Download PDFInfo
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- CN116463534A CN116463534A CN202310435179.2A CN202310435179A CN116463534A CN 116463534 A CN116463534 A CN 116463534A CN 202310435179 A CN202310435179 A CN 202310435179A CN 116463534 A CN116463534 A CN 116463534A
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- 239000000463 material Substances 0.000 title claims abstract description 55
- 238000005299 abrasion Methods 0.000 title claims abstract description 18
- 239000013590 bulk material Substances 0.000 claims abstract description 9
- 230000009977 dual effect Effects 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 6
- 238000002490 spark plasma sintering Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 14
- KXTVFSDQZZXLDA-UHFFFAOYSA-N B([O-])([O-])[O-].[W+4].B([O-])([O-])[O-].B([O-])([O-])[O-].B([O-])([O-])[O-].[W+4].[W+4] Chemical compound B([O-])([O-])[O-].[W+4].B([O-])([O-])[O-].B([O-])([O-])[O-].B([O-])([O-])[O-].[W+4].[W+4] KXTVFSDQZZXLDA-UHFFFAOYSA-N 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000002105 nanoparticle Substances 0.000 description 3
- 229910052723 transition metal Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910018885 Pt—Au Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 238000005230 valence electron density Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007656 fracture toughness test Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/149—Antislip compositions
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/14—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on borides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
- B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to an ultra-low abrasion friction pair material, the abrasion performance of the friction pair in a vacuum environment is-2.9x10 ‑8 mm 3 /Nm~3.2×10 ‑8 mm 3 between/Nm, the hardness range is 44+ -3 GPa-28+ -1 GPa WB 4 -beta B bulk material and friction dual WC balls; the WB is 4 The beta B block material comprises 65+/-5 vol% WB by volume percent 4 And 35.+ -. 5vol% beta.B; the friction dual WC ball consists of 94 wt% WC and 6 wt% Co by mass percent. WB of the invention 4 The beta/WC friction pair shows ultralow abrasion performance in a vacuum environmentCan realize near zero abrasion, and has good application prospect in the fields of precision mechanical parts and aerospace.
Description
Technical Field
The invention relates to the technical field of wear-resistant materials, in particular to an ultralow-wear friction pair material.
Background
Wear is a ubiquitous phenomenon, believed to be the damage or loss of surface material due to mechanical, chemical and thermal interactions between the moving surfaces during friction. Wear has been shown to result in about 60% equipment damage or failure. Wear failure of mechanical components is often manifested as a reduction in the size of the friction pair, severely affecting the accuracy, reliability and service life of the moving components. Therefore, the improvement of the wear resistance of the material is beneficial to prolonging the service life of mechanical equipment and reducing the maintenance cost, and is an effective technical approach for saving the material cost and reducing the energy waste. With the rapid development of tribology and the actual demands of industry, it is desirable for humans to achieve ultra-low wear and even "zero wear" in engineering and materials science.
The ultra-low wear materials are studied for nearly half a century, but only Pt-Au film\Al 2 O 3 Friction pair, gaN film/Al 2 O 3 Friction pair and Fullerene-like MoS 2 Several friction pairs such as nanoparticles film/440C friction pair show ultra-low wear performance under specific environments. For example, pt-Au film/Al at room temperature and atmosphere 2 O 3 The friction pair shows ultra-low wear performance, and the wear rate of Pt-Au is 2.6X10 -9 mm 3 /Nm，Al 2 O 3 Wear Rate 4.4X10 -9 mm 3 /Nm；GaN/ Al 2 O 3 The friction pair shows ultralow abrasion performance in a dry nitrogen environment, and the GaN abrasion rate is 4 multiplied by 10 -9 mm 3 /Nm，Al 2 O 3 Wear rate 9X 10 -9 mm 3 /Nm； Fullerene-like MoS 2 nanoparticles film/440C friction pair shows ultra-low wear performance under ultra-vacuum environment, fullerene-like MoS 2 nanoparticles film wear Rate 1.1X10 -9 mm 3 Nm,440C wear rate 1X 10 -9 mm 3 /Nm. However, the existing super wear-resistant materials are all film materials, and the report on the ultra-low wear block materials is less.
Superhard materials with high modulus can contribute to suppression of surface damage and deformation prevention, and are candidates for achieving ultra-low wear. Superhard materials can be classified into two types according to their constituent elements and bonding means: light elements (B, C, N and O) short covalent bond superhard material and novel superhard materials (W, re, os, etc.) of high valence electron density. Some conventional superhard materials have excellent characteristics of high hardness, but have limitations in their application and synthetic methods, such as diamond and cubic boron nitride. The novel superhard material not only has ultrahigh hardness, but also has the advantages of conductive metal characteristics, chemical inertness, low-cost synthesis and the like. WB (poly-B) 4 Is a typical transition metal boride, and a three-dimensional network structure consisting of a short B-B covalent bond with high shear modulus and a transition metal W element with high valence electron density has incompressibility. Current WB 4 The theoretical value of Vickers hardness is 41.1-42.1 GPa, and WB synthesized in experiments 4 The Vickers hardness value of the alloy can reach 43.3-46.1 GPa.
At present, superhard WB 4 The preparation technology of the material and the composite material thereof has been reported, but the research on the wear resistance is not disclosed. Chinese patent CN108424146A discloses and reports a preparation method of tungsten tetraborate based ceramics, which uses metal nickel powder or cobalt powder as a sintering aid, prepares the tungsten tetraborate based ceramics by hot-pressing sintering, and reduces WB by the sintering aid 4 Difficulty of sintering and increase WB 4 Purity and compactness of the block. Chinese patent CN108726526A discloses and reports a rhenium dopedThe preparation method of the doped tungsten tetraborate material is disclosed in Chinese patent CN108557834A, which reports a preparation method of chromium doped tungsten tetraborate superhard material, and the preparation method and application of the tungsten tetraborate material doped with tantalum element are disclosed in Chinese patent CN 110483057A. The above patent reports that the tungsten tetraborate material is prepared by a method of doping transition metal elements, and the technical purpose of the invention is to improve WB 4 Microstructure is used to improve the hardness and thermal stability of mechanical properties.
Disclosure of Invention
The invention aims to provide an ultralow-wear friction pair material with good performance.
In order to solve the problems, the ultralow-wear friction pair material provided by the invention is characterized in that: the abrasion performance of the friction pair in a vacuum environment is-2.9X10 -8 mm 3 /Nm ~3.2×10 -8 mm 3 Between Nm, the hardness range is 44+ -3 GPa-28+ -1 GPa WB 4 -beta B bulk material and friction dual WC balls; the WB is 4 The beta B block material comprises 65+/-5 vol% WB by volume percent 4 And 35.+ -. 5vol% beta.B; the friction dual WC ball consists of 94 wt% WC and 6 wt% Co by mass percent.
The WB is 4 The beta B block material is prepared by the following method: mixing 10-12.5% of B powder and 87.5-90% of W powder in an epicyclic high-energy ball mill with grinding balls being WC balls according to atomic percentage, and uniformly mixing to obtain mixed powder; the mixed powder is filled into a graphite grinding tool, and is placed into a spark plasma sintering furnace (SPS) for powder sintering, and the powder is naturally cooled to room temperature after the sintering is completed, thus obtaining WB 4 -beta B bulk material.
The ball milling and mixing conditions are that the ball material ratio is 4:1, a rotational speed of 250 r/min and a mixing time of 4 h.
The condition of spark plasma sintering is that the heating rate is 100 ℃/min, the vacuum degree is 15-20 Pa, the sintering temperature is 1600 ℃, the sintering pressure is 30 MPa, the sintering time is 16 min, and the radial pressurizing pressure is 30 MPa.
Compared with the prior art, the invention has the following advantages:
1. WB in the present invention 4 The beta B block material is prepared from WB with super-hard mechanical property 4 Phase and tribochemically reactive beta B phase. WB (poly-B) 4 The superhard phase bears normal friction force, so that deformation of the abrasion surface is effectively resisted; the beta B phase reacts with the friction chemistry to form B 2 O 3 The oxide layer plays roles of antifriction, antiwear and repairing the wearing surface.
2. The invention uses WB 4 -beta B bulk material and WB 4 Beta modulus of elasticity similar to WB 4 The beta B has friction compatibility, and the WC balls form a friction pair, and the friction pair shows ultralow abrasion performance in a vacuum environment, so that near zero abrasion is realized. Therefore, the friction pair can bear high friction load, meets the requirement of severe working conditions, and has good application prospect in the fields of precision mechanical parts and aerospace.
3. WB of the invention 4 The beta/WC friction pair can improve the reliability and the service life of mechanical parts. Compared with the ultralow abrasion material of the existing film material, the film material has no problems of friction life and film base combination, and the mechanical property and compressive strength are better than those of the film material.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
FIG. 1 shows WB according to the present invention 4 -X-ray diffraction pattern of beta B ultra-low wear material.
FIG. 2 shows WB according to the present invention 4 -scanning electron microscopy of beta B material.
Detailed Description
An ultra-low abrasion friction pair material, the abrasion performance of the friction pair in a vacuum environment is-2.9X10 -8 mm 3 /Nm ~3.2×10 -8 mm 3 Between Nm, the hardness range is 44+ -3 GPa-28+ -1 GPa WB 4 -beta B bulk material and friction dual WC balls. WB (poly-B) 4 The beta B block material comprises 65+/-5 vol% WB by volume percent 4 And 35.+ -. 5vol% beta.B; the friction dual WC ball is made of commercial YG6 alloy, and comprises 94-wt% WC and 6 by mass percentwt% Co.
Wherein: WB (poly-B) 4 The beta B block material is prepared by the following method: mixing 10-12.5% of B powder and 87.5-90% of W powder in a planetary high-energy ball mill with grinding balls being WC balls according to the atomic percentage, wherein the ball-to-material ratio is 4:1, a rotational speed of 250 r/min and a mixing time of 4 h. Uniformly mixing to obtain mixed powder; the mixed powder is filled into a graphite grinding tool, and is placed into a spark plasma sintering furnace (SPS) for powder sintering, wherein the heating rate is 100 ℃/min, the vacuum degree is 15-20 Pa, the sintering temperature is 1600 ℃, the sintering pressure is 30 MPa, the sintering time is 16 min, and the radial pressurizing pressure is 30 MPa. Naturally cooling to room temperature after sintering to obtain WB 4 -beta B bulk material.
【WB 4 Structural analysis of beta B bulk Material
For the WB obtained 4 X-ray diffraction test of beta B material, as shown in FIG. 1, WB alone was present in the sample 4 Diffraction peaks of the phases, without other impurity peaks.
For the WB obtained 4 Electron microscopy of beta B material, as shown in FIG. 2, gray part is WB 4 The black part is the distribution phase of beta B.
【WB 4 Mechanical Properties of beta B Block Material
1. Hardness testing:
the testing method comprises the following steps: WB test using a Vickers microhardness Meter 4 Hardness of beta B material, test conditions 50-1000 g, loading duration 10 s.
Test results: the hardness of the material is 44+ -3-28+ -1 GPa.
2. Fracture toughness test:
the testing method comprises the following steps: WB test using single-sided pre-crack beam method 4 Fracture toughness of beta B material, test conditions were 3 mm X4 mm X18 mm samples, span 16 mm, kerf depth 2 mm, hold down speed 0.5 mm/min.
Test results: the fracture toughness of the material is 1.7+/-0.2 GPa.
【WB 4 -beta/WC friction pair tribological properties
The testing method comprises the following steps: in EHT-1000 ballOpposite WB on disk contact friction and wear testing machine 4 -beta/WC friction pair for tribological performance test, WB 4 The size of the beta B sample is phi 25 mm multiplied by 3 mm, the diameter of the WC dual ball is 6 mm, the indoor air humidity range is 20-30%, the test vacuum degree is 10-100 Pa, the Hertz contact stress is 2.3 GPa, the sliding speed is 0.2 m/s, and the sliding times are (0.125-1) multiplied by 10 5 Radius of rotation 5 mm. Test WB with varying number of frictional sliding 4 Long life friction and wear performance of beta/WC friction pair.
Test results: the friction coefficient and the wear rate of the friction pair are shown in tables 1-3.
TABLE 1 coefficient of friction and wear Rate
Table 2 coefficient of friction and wear rate
TABLE 3 coefficient of friction and wear Rate
As can be seen from tables 1-3, the friction pair obtained by the invention has ultralow abrasion performance and lower friction coefficient in a vacuum environment.
Claims (4)
1. An ultra-low abrasion friction pair material is characterized in that: the abrasion performance of the friction pair in a vacuum environment is-2.9X10 -8 mm 3 /Nm ~3.2×10 -8 mm 3 Between Nm, the hardness range is 44+ -3 GPa-28+ -1 GPa WB 4 -beta B bulk material and friction dual WC balls; the WB is 4 The beta B block material comprises 65+/-5 vol% WB by volume percent 4 And 35.+ -. 5vol% beta.B; the friction dual WC ball consists of 94 wt% WC and 6 wt% Co by mass percent.
2. An ultra-low wear friction pair material as in claim 1, wherein: the WB is 4 The beta B block material is prepared by the following method: mixing 10-12.5% of B powder and 87.5-90% of W powder in an epicyclic high-energy ball mill with grinding balls being WC balls according to atomic percentage, and uniformly mixing to obtain mixed powder; the mixed powder is filled into a graphite grinding tool, and is placed into a discharge plasma sintering furnace for powder sintering, and after the sintering is completed, the powder is naturally cooled to room temperature, thus obtaining WB 4 -beta B bulk material.
3. An ultra-low wear friction pair material as in claim 2, wherein: the ball milling and mixing conditions are that the ball material ratio is 4:1, a rotational speed of 250 r/min and a mixing time of 4 h.
4. An ultra-low wear friction pair material as in claim 2, wherein: the condition of spark plasma sintering is that the heating rate is 100 ℃/min, the vacuum degree is 15-20 Pa, the sintering temperature is 1600 ℃, the sintering pressure is 30 MPa, the sintering time is 16 min, and the radial pressurizing pressure is 30 MPa.
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| CN202310435179.2A CN116463534B (en) | 2023-04-21 | 2023-04-21 | Ultralow-abrasion friction pair material |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5925837A (en) * | 1998-09-16 | 1999-07-20 | Chien-Ping Ju | Manufacturing method and products of metallic friction material |
| RO129650A2 (en) * | 2012-12-28 | 2014-07-30 | Aeg Progresiv S.R.L. | Materials and methods for carrying out gradual and complex tribologic layers in vacuum for coating metal objects subjected to friction |
| CN108424146A (en) * | 2018-04-28 | 2018-08-21 | 东北大学 | A kind of preparation method of four tungsten borides base ceramics |
| CN108557834A (en) * | 2018-05-15 | 2018-09-21 | 广东工业大学 | A kind of preparation method of four tungsten boride superhard materials of chromium doping |
| CN108726526A (en) * | 2018-06-04 | 2018-11-02 | 广东工业大学 | A kind of preparation method of four tungsten boride materials of rhenium doping |
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