CN103436823B - A kind of method for preparing powder metallurgy of self-lubricating bearing material - Google Patents
A kind of method for preparing powder metallurgy of self-lubricating bearing material Download PDFInfo
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- CN103436823B CN103436823B CN201310414116.5A CN201310414116A CN103436823B CN 103436823 B CN103436823 B CN 103436823B CN 201310414116 A CN201310414116 A CN 201310414116A CN 103436823 B CN103436823 B CN 103436823B
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Abstract
A method for preparing powder metallurgy for self-lubricating bearing material, belongs to lubricant field.The present invention adopts prior powder metallurgy method, iron powder is mixed with appropriate iron sulphide, ferromanganese powder and alloy powder and anneals, powder after annealing mixes with appropriate graphite, compacting sintering, obtain self-lubricating bearing material, raw material is cheap, technique is simple, parameter is easily controlled, production process safety and environmental protection, is applicable to large-scale industrial production.In annealing process, mixed powder reaction generates FeS and MnS, plays well lubrication and antifriction function; Meanwhile, the existence of MnS can significantly improve the cutting ability of bearing materials, reduces tool wear.The self-lubricating bearing material adopting the inventive method to prepare, can be widely used in, in the mechanized equipments such as iron and steel, metallurgy, the energy, being particularly suitable for the occasion requiring oil-free lubricatoin.
Description
Technical field
The invention belongs to lubricant field, provide a kind of method for preparing powder metallurgy of self-lubricating bearing material.
Background technology
PM self lubricated bearings has another name called sintering metal oil bearing, is an indispensable class bearing in audio and video equipment, micro-special miniature motor, office machinery, power tool, washing machine, electric fan, sewing machine, duplicating machine etc.It is that solid lubricant is added in metallic matrix raw material as constituent element in the form of a powder, by press forming, sintering, forms self-lubricating composite, using it as bearing, bearing shell or liner plate.Because material itself is containing solid lubricant, bearing move time due to heat effect and friction, the solid lubricant of self is made to form the comparatively stable lubricant film of one deck at opposite sliding surfaces, and " consumable " by itself constantly supplements and provides solid lubricant, repair and be torn or broken lubricant film of hindering, reach lubrication and antifriction function.
Along with the development of modern science and technology and the raising of product use properties, the exploitation of the novel self-lubricating material that mechanical strength is high, tribological property good and production cost is low becomes the important focus of tribological field.For iron-based self-lubricating bearing, high sintering temperature can be born and not lose the solid lubricant of wetting property little, there is certain deficiency or shortcoming, as being easily oxidized under hot environment, the problem such as production efficiency is low, cost is high, fetch long price.
Summary of the invention
The object of the present invention is to provide a kind of novel self-lubricating bearing materials, in supporting capacity, use temperature scope, antifriction self-lubricating performance, workability and production cost etc., all reach gratifying effect, can use for a long time in the occasion of oil-free lubricatoin.
In order to obtain above-mentioned self-lubricating bearing material, present invention employs following technical scheme:
Described self-lubricating bearing material is constructed as follows by weight percentage:
FeS
25-15%, FeMn10-20%, alloy powder 5-10%, graphite 1-3%, surplus is iron powder.
Described self-lubricating bearing material is made through mixing → annealing → mixing → compacting → sintering under above-mentioned formation, and concrete steps are as follows:
(1) by meet recipe requirements at FeS
2powder, FeMn powder, alloy powder and iron powder put into ball mill mixing 1-12 hour;
(2) annealed in hydrogen furnace by the powder after ball milling, annealing temperature is 600-900 DEG C, and the time is 1-3h;
(3) mixed powder after annealing is put into ball mill mixing 1-12 hour with graphite;
(4) loaded in shaft sleeve die by mixed powder and suppress, pressing pressure is 400MPa-700MPa, pressurize 2-3min, obtains bearing blank;
(5) bearing blank is put into sintering oven and carry out gas shield sintering, sintering temperature is 1000 DEG C-1250 DEG C, and soaking time is 1-2h.
(6) the axle sleeve sample that step (5) obtains is carried out the process such as surfacing, deburring, chamfering, namely obtain self-oiling bearing.
Described in step (1), the granularity of iron powder is 100-300 μm, FeS
2the granularity of powder is the granularity of 100-300 μm, FeMn powder is 100-300 μm, and the granularity of alloy powder is 100-300 μm.
Alloy powder described in step (1) is one or more in Cu, Ni, Mo, Cr etc.
The granularity of the Graphite Powder 99 described in step (3) is 100-300 μm.
Gas shield described in step (5) is argon gas, nitrogen.
Iron powder mixes with appropriate iron sulphide and ferromanganese powder and anneals by the present invention, reaction generates a certain amount of FeS and MnS, the lubricity excellent due to FeS and the excellent processing characteristics of MnS and lubricity, composite powder after annealing is further mixed, suppresses and sinters, prepares self-lubricating bearing material.FeS and MnS in material plays good lubrication; Meanwhile, the existence of MnS can significantly improve the chip performance of material, reduces tool wear.
Advantage of the present invention:
1, raw material is easy to get, cheap, preparation technology is simple, parameter is easily controlled, production process safety and environmental protection, is applicable to large-scale industrial production.
2, material can bear high sintering temperature and not lose wetting property.
3, the chip performance of material significantly improves, and reduces tool wear.
4, pass through the adjustment to material composition and optimization, define the novel self-lubricating bearing materials with the hard wild phase of high strength and finely dispersed lubrication antifriction phase mortise.
5, can be widely used in, in the mechanized equipments such as iron and steel, metallurgy, the energy, being particularly suitable for the occasion requiring oil-free lubricatoin.
Embodiment
Embodiment 1:
A kind of self-lubricating bearing material is constructed as follows by weight percentage:
FeS
25%, FeMn15%, Cu5%, C1%, surplus is iron powder;
Step 1: take the iron powder that mean particle size is 100 μm, the sulfuration iron powder of 100 μm, the ferromanganese powder of 200 μm, the copper powder of 100 μm is put on rotary mill and is mixed, time 8h;
Step 2: mixed powder is annealed in hydrogen furnace, annealing process is: 700 DEG C, 2h;
Step 3: the Graphite Powder 99 of powder with 100 μm of annealing is put on rotary mill and mixes, time 4h;
Step 4: composite powder is loaded in shaft sleeve die and suppresses, pressing pressure is 650MPa, pressurize 2min;
Step 5: by pressed compact at N
2the lower 1100 DEG C of sintering 1h of protective atmosphere, obtain bearing sample;
Step 6: bearing sample is carried out the process such as surfacing, deburring, chamfering, obtain self-oiling bearing.
Embodiment 2:
A kind of self-lubricating bearing material is constructed as follows by weight percentage:
FeS
215%, FeMn10%, Cu5%, Ni5%, C3%, surplus is iron powder;
Step 1: take the iron powder that mean particle size is 200 μm, the sulfuration iron powder of 200 μm, the ferromanganese powder of 300 μm, the copper powder of 100 μm, the nickel powder of 200 μm is put on rotary mill and is mixed, time 2h;
Step 2: mixed powder is annealed in hydrogen furnace, annealing process is: 900 DEG C, 1h;
Step 3: the Graphite Powder 99 of powder with 100 μm of annealing is put on rotary mill and mixes, time 12h;
Step 4: composite powder is loaded in shaft sleeve die and suppresses, pressing pressure is 400MPa, pressurize 3min;
Step 5: by pressed compact at N
2the lower 1200 DEG C of sintering 2h of protective atmosphere, obtain bearing sample;
Step 6: bearing sample is carried out the process such as surfacing, deburring, chamfering, obtain self-oiling bearing.
Embodiment 3:
A kind of self-lubricating bearing material is constructed as follows by weight percentage:
FeS
210%, FeMn20%, Mo4%, Ni3%, Cr1%, C2%, surplus is iron powder;
Step 1: take the iron powder that mean particle size is 100 μm, the sulfuration iron powder of 100 μm, the ferromanganese powder of 100 μm, the molybdenum powder of 200 μm, the nickel powder of 200 μm, the chromium powder of 200 μm is put on rotary mill and is mixed, time 5h;
Step 2: mixed powder is annealed in hydrogen furnace, annealing process is: 600 DEG C, 3h;
Step 3: the Graphite Powder 99 of powder with 300 μm of annealing is put on rotary mill and mixes, time 6h;
Step 4: composite powder is loaded in shaft sleeve die and suppresses, pressing pressure is 550MPa, pressurize 2min;
Step 5: by pressed compact 1000 DEG C of sintering 1.5h under Ar protective atmosphere, obtain bearing sample;
Step 6: bearing sample is carried out the process such as surfacing, deburring, chamfering, obtain self-oiling bearing.
Claims (4)
1. a method for preparing powder metallurgy for self-lubricating bearing material, is characterized in that, is formed: FeS according to mass percent by following composition proportion
25-15%, FeMn10-20%, alloy powder 5-10%, graphite 1-3%, surplus is iron powder; Concrete preparation process is as follows:
(1) FeS of recipe requirements will be met
2powder, FeMn powder, alloy powder and iron powder put into ball mill mixing 1-12 hour;
(2) annealed in hydrogen furnace by the powder after ball milling in step (1), annealing temperature is 600-900 DEG C, and the time is 1-3h;
(3) mixed powder after the annealing in step (2) and graphite are put into ball mill mixing 1-12 hour;
(4) suppress in the mixed powder loading shaft sleeve die in step (3), pressing pressure is 400MPa-700MPa, pressurize 2-3min, obtains bearing blank;
(5) bearing blank is put into sintering oven and carry out gas shield sintering, sintering temperature is 1000 DEG C-1250 DEG C, and soaking time is 1-2h.
(6) the axle sleeve sample that step (5) obtains is carried out surfacing, deburring, chamfered, namely obtain self-oiling bearing;
Described in step (1), the granularity of iron powder is 100-300 μm, FeS
2the granularity of powder is the granularity of 100-300 μm, FeMn powder is 100-300 μm, and the granularity of alloy powder is 100-300 μm.
2. the method for preparing powder metallurgy of self-lubricating bearing material according to claim 1, is characterized in that: alloy powder described in step (1) is one or more in Cu, Ni, Mo, Cr.
3. the method for preparing powder metallurgy of self-lubricating bearing material according to claim 1, is characterized in that: the granularity of Graphite Powder 99 described in step (3) be 100 ?300 μm.
4. the method for preparing powder metallurgy of self-lubricating bearing material according to claim 1, is characterized in that: gas shield described in step (5) is argon gas, nitrogen.
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| CN201310414116.5A CN103436823B (en) | 2013-09-12 | 2013-09-12 | A kind of method for preparing powder metallurgy of self-lubricating bearing material |
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| CN103436823B true CN103436823B (en) | 2015-08-12 |
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| CN106086590A (en) * | 2016-07-25 | 2016-11-09 | 安徽银球轴承有限公司 | A kind of preparation method of hexagonal boron nitride modification anti-corrosion and high strength self-lubricating bearing |
| CN106122274A (en) * | 2016-07-25 | 2016-11-16 | 安徽银球轴承有限公司 | A kind of water pump preparation method of corrosion-resistant self-lubricating bearing |
| CN106151285B (en) * | 2016-08-26 | 2018-05-11 | 山东文远石油装备有限责任公司 | A kind of internal combustion engine bearing |
| CN107321974A (en) * | 2017-07-06 | 2017-11-07 | 合肥工业大学 | A kind of unleaded iron-based material for sliding bearing of high-strength antifriction and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332264A (en) * | 2001-07-25 | 2002-01-23 | 李喜林 | Antiwear cast alloy material with high sulfur content and several compoiste self-lubricating phases |
| CN103008667A (en) * | 2013-01-07 | 2013-04-03 | 北京科技大学 | Method for preparing high-density iron-base powder metallurgy parts |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332264A (en) * | 2001-07-25 | 2002-01-23 | 李喜林 | Antiwear cast alloy material with high sulfur content and several compoiste self-lubricating phases |
| CN103008667A (en) * | 2013-01-07 | 2013-04-03 | 北京科技大学 | Method for preparing high-density iron-base powder metallurgy parts |
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