CN102994879A - Ceramimetallurgical oil-free lubrication bearing and manufacturing method thereof - Google Patents
Ceramimetallurgical oil-free lubrication bearing and manufacturing method thereof Download PDFInfo
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- CN102994879A CN102994879A CN2012104931747A CN201210493174A CN102994879A CN 102994879 A CN102994879 A CN 102994879A CN 2012104931747 A CN2012104931747 A CN 2012104931747A CN 201210493174 A CN201210493174 A CN 201210493174A CN 102994879 A CN102994879 A CN 102994879A
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Abstract
The invention relates to a ceramimetallurgical oil-free lubrication bearing and a manufacturing method thereof. Powder material comprises the following ingredients by weight percent: 0.5-1.5% of graphite, 0.4-0.5% of molybdenum disulfide, 0.5-1% of copper, 0.01-0.03% of boron, 0.001-0.003% of dysprosium, 0.3-0.5% of zinc stearate and the balance of iron, wherein the dysprosium is added in a manner of containing 15% of dysprosium-iron alloy.
Description
Technical field
The invention belongs to field of bearings, refer to especially a kind of Nonlubricated bearing and preparation method of powder metallurgy.
Background technology
Present sintered metal powder bearing technology, mainly being by operations such as batch mixing, moulding, sintering shaping, double sintering, thermal treatment, precision work, immersion oil, is a kind of oil bearing, for oil lubrication is arranged, that is to say in the use procedure afterwards, need to regularly add lubricating oil.And in some low speed, the less demanding parts of load, can realize oil-free lubricatoin in conjunction with the characteristic of oil-free lubricatoin fully.But existing field of powder metallurgy also can't realize this technology.
Also have recently technology to propose a kind of oil-free lubricatoin mode for powder metallurgy and make bearing, it mainly is to add graphite, molybdenumdisulphide, copper and machine oil composition in iron powder.But its finished product still belong to the oil lubrication technology is arranged, can't realize the oil-free lubricatoin technology fully.
Summary of the invention
The Nonlubricated bearing that the purpose of this invention is to provide a kind of powder metallurgy by the technical program, can be realized in use not needing charging-up lubricant oil just can keep enough frictional coefficient fully.
The present invention is achieved by the following technical solutions:
A kind of Nonlubricated bearing of powder metallurgy, its powdered material forms and comprises by weight percentage the dysprosium of the copper of the graphite of 0.5-1.5%, the molybdenumdisulphide of 0.4-0.5%, 0.5-1%, the boron of 0.01-0.03%, 0.001-0.003%, the Zinic stearas of 0.3-0.5% and the iron of surplus; Wherein dysprosium is that the mode that contains the Dy-Fe alloy of dysprosium 15% adds.
A kind of Nonlubricated bearing preparation method of powder metallurgy is:
Batch mixing will be determined the material mixing of prescription, and then grind into the powder that grain diameter on average is no more than 100 microns that preferably grain diameter on average is no more than the powder of 10-20 micron;
Compacting, the mode that adopts one or many to fill, the pressure with 600-750MPa in mould is suppressed 10-60 moulding second;
Sintering, at first under 600-800 ℃ of temperature presintering 1-2 hour, and then mould is interior with shaping under the 150-200MPa pressure, again in 1100-1250 ℃ of lower sintering and be incubated 1-3 hour, then divide the two-stage cooling, the cooling rate of fs remains on 2.5-3.5 ℃/minute, and tempering is 1-3 hour when drop in temperature arrives 400-450 ℃, immerses oil temperature oil immersion in 110-130 ℃ deep fat when then naturally cooling to 200 ± 20 ℃.
The beneficial effect that the present invention compares with prior art is:
In the technical program, by in powder, adding graphite, Zinic stearas, molybdenumdisulphide to guarantee indeformable under high temperature, high pressure, the few friction of bearing and lubricant effect.
By wanting to add boron in the powder, guarantee hardness and the slickness of bearing surface, can reduce the frictional coefficient when being lower than 100 ℃.
By in powder, adding the dysprosium element, utilize dysprosium lubricant effect at high temperature, to guarantee bearing in use, when the lubricity that bearing occurs to guarantee under the high-temperature condition, to guarantee the safety of bearing.
By the technical program, the hardness of bearing surface on average can reach 281-342HB, and temperature is at 300 ℃, and the frictional coefficient after 8 hours is still less than 0.15.
Embodiment
Below come by specific embodiment that the present invention is described in detail, should be understood that, these embodiment only can be used for explaining the present invention and can not be used for explaining is limitation of the present invention.
A kind of Nonlubricated bearing of powder metallurgy, its powdered material forms and comprises by weight percentage the dysprosium of the copper of the graphite of 0.5-1.5%, the molybdenumdisulphide of 0.4-0.5%, 0.5-1%, the boron of 0.01-0.03%, 0.001-0.003%, the Zinic stearas of 0.3-0.5% and the iron of surplus; Wherein dysprosium is that the mode that contains the Dy-Fe alloy of dysprosium 15% adds.
Described preparation method is:
Batch mixing will be determined the material mixing of prescription, and then grind into the powder that grain diameter on average is no more than 100 microns that preferably grain diameter on average is no more than the powder of 10-20 micron; It is described that what grind employing is conventional mechanical;
Compacting, the mode that adopts one or many to fill, the pressure with 600-750MPa in mould is suppressed 10-60 moulding second;
Sintering, at first under 600-800 ℃ of temperature presintering 1-2 hour, and then mould is interior with shaping under the 150-200MPa pressure, again in 1100-1250 ℃ of lower sintering and be incubated 1-3 hour, then divide the two-stage cooling, the cooling rate of fs remains on 2.5-3.5 ℃/minute, and tempering is 1-3 hour when drop in temperature arrives 400-450 ℃, immerses oil temperature oil immersion in 110-130 ℃ deep fat when then naturally cooling to 200 ± 20 ℃.
Embodiment 1
A kind of Nonlubricated bearing of powder metallurgy, its powdered material forms and comprises by weight percentage, 0.5% graphite, 0.4% molybdenumdisulphide, 0.5% copper, 0.01% boron, 0.001% dysprosium, 0.3% Zinic stearas and the iron of surplus; Wherein dysprosium is that the mode that contains the Dy-Fe alloy of dysprosium 15% adds.
The preparation method is:
Batch mixing will be determined the material mixing of prescription, and then grind into the powder that grain diameter on average is no more than 100 microns that preferably grain diameter on average is no more than the powder of 10-20 micron; It is described that what grind employing is conventional mechanical;
Compacting, the mode that adopts one or many to fill, the pressure with 700MPa in mould is suppressed moulding in 30 seconds;
Sintering, at first presintering 1 hour under 600-800 ℃ of temperature, and then mould is interior with shaping under the 200MPa pressure, again in 1100-1250 ℃ of lower sintering and be incubated 2 hours, then divide the two-stage cooling, the cooling rate of fs remains on 2.5-3.5 ℃/minute, and tempering is 2 hours when drop in temperature arrives 400-450 ℃, immerses oil temperature oil immersion in 110-130 ℃ deep fat when then naturally cooling to 200 ± 20 ℃.
Embodiment 2
A kind of Nonlubricated bearing of powder metallurgy, its powdered material forms and comprises by weight percentage, 1.5% graphite, 0.5% molybdenumdisulphide, 1% copper, 0.03% boron, 0.003% dysprosium, 0.5% Zinic stearas and the iron of surplus; Wherein dysprosium is that the mode that contains the Dy-Fe alloy of dysprosium 15% adds.
Embodiment 3
A kind of Nonlubricated bearing of powder metallurgy, its powdered material forms and comprises by weight percentage, 1.0% graphite, 0.4% molybdenumdisulphide, 0.8% copper, 0.02% boron, 0.002% dysprosium, 0.4% Zinic stearas and the iron of surplus; Wherein dysprosium is that the mode that contains the Dy-Fe alloy of dysprosium 15% adds.
Embodiment 4
A kind of Nonlubricated bearing of powder metallurgy, its powdered material forms and comprises by weight percentage, 1.2% graphite, 0.5% molybdenumdisulphide, 0.5% copper, 0.03% boron, 0.002% dysprosium, 0.3% Zinic stearas and the iron of surplus; Wherein dysprosium is that the mode that contains the Dy-Fe alloy of dysprosium 15% adds.
Claims (2)
1. the Nonlubricated bearing of a powder metallurgy, it is characterized in that: its powdered material forms and comprises by weight percentage the dysprosium of the copper of the graphite of 0.5-1.5%, the molybdenumdisulphide of 0.4-0.5%, 0.5-1%, the boron of 0.01-0.03%, 0.001-0.003%, the Zinic stearas of 0.3-0.5% and the iron of surplus; Wherein dysprosium is that the mode that contains the Dy-Fe alloy of dysprosium 15% adds.
2. the Nonlubricated bearing preparation method of a powder metallurgy is characterized in that:
Batch mixing will be determined the material mixing of prescription, and then grind into the powder that grain diameter on average is no more than 100 microns that preferably grain diameter on average is no more than the powder of 10-20 micron;
Compacting, the mode that adopts one or many to fill, the pressure with 600-750MPa in mould is suppressed 10-60 moulding second;
Sintering, at first under 600-800 ℃ of temperature presintering 1-2 hour, and then mould is interior with shaping under the 150-200MPa pressure, again in 1100-1250 ℃ of lower sintering and be incubated 1-3 hour, then divide the two-stage cooling, the cooling rate of fs remains on 2.5-3.5 ℃/minute, and tempering is 1-3 hour when drop in temperature arrives 400-450 ℃, immerses oil temperature oil immersion in 110-130 ℃ deep fat when then naturally cooling to 200 ± 20 ℃.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996638A (en) * | 2012-11-22 | 2013-03-27 | 宁波市群星粉末冶金有限公司 | Ceramimetallurgical oil-free lubrication bearing |
| CN103537678A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile bearing and manufacturing method thereof |
| CN106077627A (en) * | 2016-08-27 | 2016-11-09 | 宁波市鄞州新华仪表电机配件厂 | A kind of preparation method of sliding bearing |
| CN106086687A (en) * | 2016-08-27 | 2016-11-09 | 宁波市鄞州新华仪表电机配件厂 | The preparation method of the sliding bearing that a kind of thermal coefficient of expansion is low |
| CN106180728A (en) * | 2016-08-27 | 2016-12-07 | 宁波市鄞州新华仪表电机配件厂 | A kind of preparation method of motor shaft sleeve |
| CN106216686A (en) * | 2016-08-27 | 2016-12-14 | 宁波市鄞州新华仪表电机配件厂 | A kind of preparation method of wear-resisting low-friction coefficient motor shaft sleeve |
| CN106238736A (en) * | 2016-08-27 | 2016-12-21 | 宁波市鄞州新华仪表电机配件厂 | A kind of preparation method of low-friction coefficient sliding bearing |
| CN106498309A (en) * | 2016-11-01 | 2017-03-15 | 安徽恒均粉末冶金科技股份有限公司 | A kind of high optical axis sprocket wheel method for preparing powder metallurgy of thermohardening |
| CN108504918A (en) * | 2018-04-09 | 2018-09-07 | 张家港市海工船舶机械制造有限公司 | A kind of Nonlubricated bearing and its preparation process |
| CN110394444A (en) * | 2019-07-10 | 2019-11-01 | 济南钢城科力新材料股份有限公司 | A kind of PM self lubricated bearings and preparation method thereof |
| CN110919011A (en) * | 2019-11-29 | 2020-03-27 | 安徽恒均粉末冶金科技股份有限公司 | Intelligent transmission equipment powder metallurgy part and preparation method thereof |
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| EP2357258A2 (en) * | 2008-10-23 | 2011-08-17 | Doosan Infracore Co., Ltd. | Sliding bearing with improved wear resistance and method of manufacturing same |
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| CN1851280A (en) * | 2006-05-28 | 2006-10-25 | 揭朝奎 | Weldable sintered metal powder bearing, and its production process |
| CN101573543A (en) * | 2006-11-20 | 2009-11-04 | 斗山英维高株式会社 | Bearing having improved consume resistivity and manufacturing method thereof |
| EP2357258A2 (en) * | 2008-10-23 | 2011-08-17 | Doosan Infracore Co., Ltd. | Sliding bearing with improved wear resistance and method of manufacturing same |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996638A (en) * | 2012-11-22 | 2013-03-27 | 宁波市群星粉末冶金有限公司 | Ceramimetallurgical oil-free lubrication bearing |
| CN103537678A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile bearing and manufacturing method thereof |
| CN106077627A (en) * | 2016-08-27 | 2016-11-09 | 宁波市鄞州新华仪表电机配件厂 | A kind of preparation method of sliding bearing |
| CN106086687A (en) * | 2016-08-27 | 2016-11-09 | 宁波市鄞州新华仪表电机配件厂 | The preparation method of the sliding bearing that a kind of thermal coefficient of expansion is low |
| CN106180728A (en) * | 2016-08-27 | 2016-12-07 | 宁波市鄞州新华仪表电机配件厂 | A kind of preparation method of motor shaft sleeve |
| CN106216686A (en) * | 2016-08-27 | 2016-12-14 | 宁波市鄞州新华仪表电机配件厂 | A kind of preparation method of wear-resisting low-friction coefficient motor shaft sleeve |
| CN106238736A (en) * | 2016-08-27 | 2016-12-21 | 宁波市鄞州新华仪表电机配件厂 | A kind of preparation method of low-friction coefficient sliding bearing |
| CN106498309A (en) * | 2016-11-01 | 2017-03-15 | 安徽恒均粉末冶金科技股份有限公司 | A kind of high optical axis sprocket wheel method for preparing powder metallurgy of thermohardening |
| CN108504918A (en) * | 2018-04-09 | 2018-09-07 | 张家港市海工船舶机械制造有限公司 | A kind of Nonlubricated bearing and its preparation process |
| CN110394444A (en) * | 2019-07-10 | 2019-11-01 | 济南钢城科力新材料股份有限公司 | A kind of PM self lubricated bearings and preparation method thereof |
| CN110919011A (en) * | 2019-11-29 | 2020-03-27 | 安徽恒均粉末冶金科技股份有限公司 | Intelligent transmission equipment powder metallurgy part and preparation method thereof |
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Application publication date: 20130327 |