CN108515178A - A kind of copper-based oil containing bearing material of iron and preparation method thereof - Google Patents
A kind of copper-based oil containing bearing material of iron and preparation method thereof Download PDFInfo
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- CN108515178A CN108515178A CN201810488734.7A CN201810488734A CN108515178A CN 108515178 A CN108515178 A CN 108515178A CN 201810488734 A CN201810488734 A CN 201810488734A CN 108515178 A CN108515178 A CN 108515178A
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- copper
- iron
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- zinc
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 81
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 33
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 30
- 239000010949 copper Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims description 15
- 239000000463 material Substances 0.000 title description 18
- 239000000843 powder Substances 0.000 claims abstract description 125
- 229910052582 BN Inorganic materials 0.000 claims abstract description 23
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 20
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 20
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 20
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 19
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005253 cladding Methods 0.000 claims abstract description 17
- 229910000906 Bronze Inorganic materials 0.000 claims abstract description 14
- 239000010974 bronze Substances 0.000 claims abstract description 14
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 16
- 238000007654 immersion Methods 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 description 14
- 230000007797 corrosion Effects 0.000 description 12
- 239000011701 zinc Substances 0.000 description 8
- 229910052725 zinc Inorganic materials 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 206010020843 Hyperthermia Diseases 0.000 description 1
- PDYXSJSAMVACOH-UHFFFAOYSA-N [Cu].[Zn].[Sn] Chemical compound [Cu].[Zn].[Sn] PDYXSJSAMVACOH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B22F1/0003—
-
- 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
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
-
- 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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
Abstract
The present invention provides a kind of copper-based oiliness bearings of iron, it is made of the raw material of following weight proportion：40~80% copper-clad iron powders, 10~50% tin bronze powders, 1~4% zinc powder, 1~5% phosphor-copper powder, 1~5% Cu-cladding Al Rod powder, 0.5~2% boron nitride powder, 1~3% silicon nitride powder, 0.5~1% Zinc stearate powder.Test result shows, the present invention makes bearing be suitable for the most of working conditions such as high load, high rotating speed, and adjusted by suitable ratio by selecting specific raw material and raw material proportioning, it is suitable for specific working condition, has a vast market application prospect.
Description
Technical field
The present invention relates to a kind of oiliness bearings, and in particular to a kind of copper-based oiliness bearing of iron and preparation method thereof.
Background technology
Oiliness bearing is a kind of widely used, industrial products that can only be produced with PM technique, as middle-size and small-size
The key components and parts of motor, oiliness bearing support motor shaft and are operated, and are directly related to motor in noise, the table on the service life
It is existing.
Common oiliness bearing is divided into three major class：Copper-based oil bearing, iron-based oil bearing, the copper-based oil bearing of iron.It is copper-based to contain
The advantages of oil bearing, is that good corrosion resistance, low noise, long lifespan, friction coefficient are small, thermal conductivity is good, and anti-seizing property is good, still
Intensity and hardness is relatively low, cost is more high, is only applicable to the operating mode of underload, high linear speed.The intensity of iron-based oiliness bearing
Height, cost wearability are good, but its is perishable, seizure resistance is poor, is only applicable to higher load, the operating mode of relatively low linear velocity.Iron
Copper-based oiliness bearing has had both the advantages of iron-based oiliness bearing and copper-based oiliness bearing, and intensity is high, hardness is high, at low cost, anti-corrosion
Property is good, wearability is good, friction coefficient is small, but its sintered dimensions change rate is larger, be only applicable to high load capacity, low linear velocity work
Condition；And when the content of copper in the copper-based oiliness bearing of iron is more than solubility of the copper in iron, material internal becomes copper and iron metal
Complex, since the corrosion potential of iron and copper is different, in wet environment, copper and iron adds as the primary battery of electrochemical corrosion
The corrosion of fast part, may lead to the failure of part.
Therefore, it is badly in need of a kind of good combination property currently on the market, is suitble to the oiliness bearing of most of working conditions.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of copper-based oiliness bearing of iron, it is by the original of following weight proportion
Material is prepared：
40~80% copper-clad iron powders, 10~50% tin bronze powders, 1~4% zinc powder, 1~5% phosphor-copper powder, 1~5% copper-clad
Graphite powder, 0.5~2% boron nitride powder, 1~3% silicon nitride powder, 0.5~1% Zinc stearate powder.
Further, it is prepared by the raw material of following weight proportion：
60~80% copper-clad iron powders, 10~35% tin bronze powders, 1~4% zinc powder, 1~5% phosphor-copper powder, 1~5% copper-clad
Graphite powder, 0.5~1% boron nitride powder, 1~3% silicon nitride powder, 1% Zinc stearate powder.
Further, it is prepared by the raw material of following weight proportion：
60~80% copper-clad iron powders, 10~30% tin bronze powders, 1~3% zinc powder, 1~2% phosphor-copper powder, 1~2% copper-clad
Graphite powder, 1% boron nitride powder, 1% silicon nitride powder, 1% Zinc stearate powder.
Further, it is prepared by the raw material of following weight proportion：
60% copper-clad iron powder, 30% tin bronze powder, 3% zinc powder, 2% phosphor-copper powder, 2% Cu-cladding Al Rod powder, 1% boron nitride
Powder, 1% silicon nitride powder, 1% Zinc stearate powder.
Further, the granularity of the copper-clad iron powder is -100 mesh, and the granularity of the tin bronze powder is -100 mesh, the zinc
The granularity of powder is -300 mesh, and the granularity of the phosphor-copper powder is -300 mesh, and the granularity of the Cu-cladding Al Rod powder is -200 mesh, the nitrogen
The granularity for changing boron powder is -300 mesh, and the granularity of the silicon nitride powder is -300 mesh, and the granularity of the Zinc stearate powder is -300 mesh.
Further, the boron nitride powder is nodularization cubic boron nitride powder.
The present invention also provides a kind of methods preparing the copper-based oiliness bearing of above-mentioned iron, it is adopted with the conventional methods in the field
(dispensing-batch mixing-forming-sintering-shaping-vacuum oil immersion) is prepared, wherein the temperature of sintering is 850 DEG C.
Copper-clad iron powder is uniformly to have coated one layer of copper in iron particle periphery.This iron is introduced into formula, improves bearing
Whole hardness, makes the bearing capacity of bearing be promoted；And reduce material cost.And one layer of copper of iron powder outer wrapping, make material
Expect that no iron particle is exposed outside, the anti-corrosion capability height for increasing copper, the feature that friction coefficient is low, thermal conductivity is good.
Zinc powder has carried out alloying with copper, has formed copper-tin-zinc ternary alloy three-partalloy, further improve in sintering process
The corrosion resistance of material surface.
Phosphor-copper powder is molten into liquid in sintering, and favorably and alloying, the attachment for promoting the copper-clad coating in iron particle are strong
Degree, promoted interlocking intensity in material of Cu-cladding Al Rod powder, boron nitride powder, silicon nitride powder, the intensity of promotion material entirety with it is tough
Property, favorably with bear higher load, and promoted and bear oscillating load ability.
Graphite powder is added in a manner of Cu-cladding Al Rod, improves interlocking intensity of the graphite in material.When motor operates
When, surface layer layers of copper, which is ground off, makes graphite be exposed in sliding working face, plays the role of lubricating anti-attrition.
Silicon nitride powder, among the material of Dispersed precipitate, using its low-friction coefficient and high rigidity feature, when bearing bears height
When pressure, reinforcement is played, the dispersion-strengthened effect that prevention material plasticity deforms.
Boron nitride powder among the material of Dispersed precipitate, is played using its red hardness feature when motor ultrahigh speed is run
Material is prevented to be plastically deformed and be welded the dispersion-strengthened effect of bonding under localized hyperthermia.
The present invention makes bearing be suitable for high load, high rotating speed etc. big absolutely by selecting specific raw material and raw material proportioning
Most working conditions, and adjusted by suitable ratio, you can specific working condition is adapted to, has a vast market and answers
Use foreground.
Obviously, the above according to the present invention is not being departed from according to the ordinary technical knowledge and customary means of this field
Under the premise of the above-mentioned basic fundamental thought of the present invention, the modification, replacement or change of other diversified forms can also be made.
The specific implementation mode of form by the following examples remakes further specifically the above of the present invention
It is bright.But the range that this should not be interpreted as to the above-mentioned theme of the present invention is only limitted to example below.It is all to be based on the above of the present invention
The technology realized all belongs to the scope of the present invention.
Specific implementation mode
Raw material and instrument used in the present invention can be commercially available by market.
The preparation of embodiment 1, bearing of the present invention
(1) feeding：80g copper-clads iron powder, 10g tin bronze powders, 3g zinc powders, 2g phosphor-coppers powder, 2g Cu-cladding Al Rods powder, 1g nodularizations are vertical
Square boron nitride powder, 1g silicon nitride powders, 1g Zinc stearate powders.
(2) it prepares:Batch mixing--850 DEG C of forming is sintered 30 minutes-shaping-vacuum oil immersion to get the high corrosion resisting bearing of the present invention.
The preparation of embodiment 2, bearing of the present invention
(1) feeding：70g copper-clads iron powder, 20g tin bronze powders, 3g zinc powders, 2g phosphor-coppers powder, 2g Cu-cladding Al Rods powder, 1g nodularizations are vertical
Square boron nitride powder, 1g silicon nitride powders, 1g Zinc stearate powders.
(2) it prepares:Batch mixing--850 DEG C of forming is sintered 30 minutes-shaping-vacuum oil immersion to get the high corrosion resisting bearing of the present invention.
The preparation of embodiment 3, bearing of the present invention
(1) feeding：60g copper-clads iron powder, 30g tin bronze powders, 3g zinc powders, 2g phosphor-coppers powder, 2g Cu-cladding Al Rods powder, 1g nodularizations are vertical
Square boron nitride powder, 1g silicon nitride powders, 1g Zinc stearate powders.
(2) it prepares:Batch mixing--850 DEG C of forming is sintered 30 minutes-shaping-vacuum oil immersion to get the high corrosion resisting bearing of the present invention.
The preparation of embodiment 4, bearing of the present invention
(1) feeding：50g copper-clads iron powder, 40g tin bronze powders, 3g zinc powders, 2g phosphor-coppers powder, 2g Cu-cladding Al Rods powder, 1g nodularizations are vertical
Square boron nitride powder, 1g silicon nitride powders, 1g Zinc stearate powders.
(2) it prepares:Batch mixing--850 DEG C of forming is sintered 30 minutes-shaping-vacuum oil immersion to get the high corrosion resisting bearing of the present invention.
The preparation of embodiment 5, bearing of the present invention
(1) feeding：40g copper-clads iron powder, 50g tin bronze powders, 3g zinc powders, 2g phosphor-coppers powder, 2g Cu-cladding Al Rods powder, 1g nodularizations are vertical
Square boron nitride powder, 1g silicon nitride powders, 1g Zinc stearate powders.
(2) it prepares:Batch mixing--850 DEG C of forming is sintered 30 minutes-shaping-vacuum oil immersion to get the high corrosion resisting bearing of the present invention.
The preparation of embodiment 6, bearing of the present invention
(1) feeding：60g copper-clads iron powder, 20g tin bronze powders, 4g zinc powders, 5g phosphor-coppers powder, 5g Cu-cladding Al Rods powder, 2g nodularizations are vertical
Square boron nitride powder, 3g silicon nitride powders, 1g Zinc stearate powders.
(2) it prepares:Batch mixing--850 DEG C of forming is sintered 30 minutes-shaping-vacuum oil immersion to get the high corrosion resisting bearing of the present invention.
The preparation of embodiment 7, bearing of the present invention
(1) feeding：60g copper-clads iron powder, 34.5g tin bronze powders, 1g zinc powders, 1g phosphor-coppers powder, 1g Cu-cladding Al Rods powder, 0.5g balls
Change cubic boron nitride powder, 1g silicon nitride powders, 1g Zinc stearate powders.
(2) it prepares:Batch mixing--850 DEG C of forming is sintered 30 minutes-shaping-vacuum oil immersion to get the high corrosion resisting bearing of the present invention.
Illustrate beneficial effects of the present invention below by way of the mode of test example.
The performance test of test example 1, bearing
1. experiment material：
Bearing prepared by embodiment 1-7；
Comparative example 1：
Raw material：81.5g iron powder+18g copper powder+0.5g Zinc stearate powders (GB FZ14262)
Preparation method：Mixed powder-compacting-sintering (980 DEG C keep the temperature 30 minutes)-integer-cleaning-immersion oil.
Comparative example 2：
Raw material：10 alloyed powder+1g graphite powder+1g Zinc stearate powders of 55g iron powder+43g copper and tins
Preparation method：Mixed powder-compacting-sintering (850 DEG C keep the temperature 30 minutes)-integer-cleaning-immersion oil.
2. performance test
(1) shrinking percentage：The shrinking percentage of above-mentioned material is tested according to GB/T228-2002
(2) crushing strength：The radial crushing strength of above-mentioned material is tested according to GB/T 6804-2008；
(3) hardness test：The HB hardness of above-mentioned material end face is tested according to GB231-84；
(4) rust prevention test：The time of rust has been tested in immersion water；
(5) wear-resisting test：The wear extent of endoporus after 380PV values are tested 120 hours；
3. result
The performance test results are shown in Table 1：
The test result of table 1 Examples 1 to 7 and comparative example 1~2
The above results show under the raw material proportioning of the embodiment of the present invention 1~7, and bearing of the invention has excellent resistance to
Corrosive nature；Under the raw material proportioning of 1~embodiment of embodiment 3, bearing of the invention has excellent shrinking percentage, conquassation strong
The comprehensive performances such as degree, hardness, corrosion-resistant, wear-resistant and sintered dimensions change rate be small, wherein in the raw material proportioning of embodiment 3
The comprehensive performance of the bearing of lower preparation is best.
To sum up, the present invention makes bearing be suitable for high load, high rotating speed etc. by selecting specific raw material and raw material proportioning
Most of working condition, and adjusted by suitable ratio, you can specific working condition is adapted to, there is wide city
Field application prospect.
Claims (8)
1. a kind of copper-based oiliness bearing of iron, it is characterised in that：It is prepared by the raw material of following weight proportion：
40~80% copper-clad iron powders, 10~50% tin bronze powders, 1~4% zinc powder, 1~5% phosphor-copper powder, 1~5% Cu-cladding Al Rod
Powder, 0.5~2% boron nitride powder, 1~3% silicon nitride powder, 0.5~1% Zinc stearate powder.
2. the copper-based oiliness bearing of iron according to claim 1, it is characterised in that：It is by the raw material system of following weight proportion
It is standby to form：
60~80% copper-clad iron powders, 10~35% tin bronze powders, 1~4% zinc powder, 1~5% phosphor-copper powder, 1~5% Cu-cladding Al Rod
Powder, 0.5~1% boron nitride powder, 1~3% silicon nitride powder, 1% Zinc stearate powder.
3. the copper-based oiliness bearing of iron according to claim 2, it is characterised in that：It is by the raw material system of following weight proportion
It is standby to form：
60~80% copper-clad iron powders, 10~30% tin bronze powders, 1~3% zinc powder, 1~2% phosphor-copper powder, 1~2% Cu-cladding Al Rod
Powder, 1% boron nitride powder, 1% silicon nitride powder, 1% Zinc stearate powder.
4. the copper-based oiliness bearing of iron according to claim 3, it is characterised in that：It is by the raw material system of following weight proportion
It is standby to form：
60% copper-clad iron powder, 30% tin bronze powder, 3% zinc powder, 2% phosphor-copper powder, 2% Cu-cladding Al Rod powder, 1% boron nitride powder, 1%
Silicon nitride powder, 1% Zinc stearate powder.
5. according to the copper-based oiliness bearing of claim 1-4 any one of them iron, it is characterised in that：The granularity of the copper-clad iron powder
Granularity for -100 mesh, the tin bronze powder is -100 mesh, and the granularity of the zinc powder is -300 mesh, the granularity of the phosphor-copper powder
Granularity for -300 mesh, the Cu-cladding Al Rod powder is -200 mesh, and the granularity of the boron nitride powder is -300 mesh, the silicon nitride powder
Granularity be -300 mesh, the granularity of the Zinc stearate powder is -300 mesh.
6. according to the copper-based oiliness bearing of claim 1-5 any one of them iron, it is characterised in that：The boron nitride powder is nodularization
Cubic boron nitride powder.
7. the preparation method of any one of the claim 1~6 copper-based oiliness bearing of iron：It is characterized in that：It includes following step
Suddenly：
Dispensing-batch mixing-forming-sintering-shaping-vacuum oil immersion.
8. preparation method according to claim 7, it is characterised in that：The temperature of sintering is 850 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810488734.7A CN108515178B (en) | 2018-05-21 | 2018-05-21 | Iron-copper-based oil-retaining bearing material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810488734.7A CN108515178B (en) | 2018-05-21 | 2018-05-21 | Iron-copper-based oil-retaining bearing material and preparation method thereof |
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| CN108515178B CN108515178B (en) | 2021-05-14 |
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| CN110983151A (en) * | 2019-12-10 | 2020-04-10 | 华南理工大学 | High-iron copper-based oil-retaining bearing material containing nano WC and preparation method thereof |
| CN112276077A (en) * | 2020-10-28 | 2021-01-29 | 福州市辰亿五金制品有限公司 | High-wear-resistance copper-coated graphite for oil-retaining bearing and manufacturing method thereof |
| CN112453385A (en) * | 2020-11-23 | 2021-03-09 | 成都威士达粉末冶金有限公司 | Powder metallurgy composite material with high composite ratio and manufacturing method thereof |
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| CN109692951A (en) * | 2018-12-20 | 2019-04-30 | 东睦新材料集团股份有限公司 | The manufacturing method of PM self lubricated bearings |
| CN109692951B (en) * | 2018-12-20 | 2022-03-01 | 东睦新材料集团股份有限公司 | Method for manufacturing powder metallurgy self-lubricating bearing |
| CN110983151A (en) * | 2019-12-10 | 2020-04-10 | 华南理工大学 | High-iron copper-based oil-retaining bearing material containing nano WC and preparation method thereof |
| CN110983151B (en) * | 2019-12-10 | 2021-09-21 | 华南理工大学 | High-iron copper-based oil-retaining bearing material containing nano WC and preparation method thereof |
| CN112276077A (en) * | 2020-10-28 | 2021-01-29 | 福州市辰亿五金制品有限公司 | High-wear-resistance copper-coated graphite for oil-retaining bearing and manufacturing method thereof |
| CN112453385A (en) * | 2020-11-23 | 2021-03-09 | 成都威士达粉末冶金有限公司 | Powder metallurgy composite material with high composite ratio and manufacturing method thereof |
| CN112453385B (en) * | 2020-11-23 | 2022-09-27 | 成都威士达粉末冶金有限公司 | Powder metallurgy composite material with high composite ratio and manufacturing method thereof |
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