CN100467170C - Weldable sintered metal powder bearing, and its production process - Google Patents
Weldable sintered metal powder bearing, and its production process Download PDFInfo
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- CN100467170C CN100467170C CNB2006100516862A CN200610051686A CN100467170C CN 100467170 C CN100467170 C CN 100467170C CN B2006100516862 A CNB2006100516862 A CN B2006100516862A CN 200610051686 A CN200610051686 A CN 200610051686A CN 100467170 C CN100467170 C CN 100467170C
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- sintered metal
- metal powder
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- powder bearing
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Abstract
The invention discloses weldability powder metallurgy bearing and its manufacturing technique. The powder material compositions includes 100 part iron powder, 0.5-1.2 part graphite powder, 0.4-0.5 part supramoly, and 0.5-3 part copper powder. It also includes 0.8 part organic oil and under 0.8 part zinc stearate. The carbon content in the finished bearing is 0.4 percent. Its manufacturing technique is as follows: mixing uniformly powder material; pressing; sintering; the sintering temperature is from 1050 centigrade degree to 1200 centigrade degree; repeating pressing or fine finishing; doing steam treatment or quenching; and doing hot immersion oil. Its advantages are no distortion and little abrasion. And it can be directly used to weld.
Description
Technical field
The present invention relates to a kind of bearing of new material, particularly a kind of weldable sintered metal powder bearing and production technology.
Background technology
The sintered metal powder bearing of Chu Xianing all passes through batch mixing-stirring-moulding-sintering-integer-double sintering-machining-heat treatment-operations such as vibration grinding-vacuum oil immersion in the market, and it is a kind of oiliness bearing, realizes having oil lubrication.The critical defect of this oiliness bearing in welding process is exactly that oil is easy to burning, increased the difficulty of welding.In addition, because in welding process, the high-temp combustion of electric arc reduces the oil content of bearing, has not realized oil lubrication, a kind of oil-free lubrication state occurs, does not reach the true lubrication effect, has increased frictional force, has shortened service life.Moreover; because country more and more payes attention to environmental protection; in mechanical industry; a lot of mechanical bodies change sheet metal component into by cast member; develop towards light, attractive in appearance, fairshaped direction; particularly to some low speed, rotation, the less demanding parts of slip load; the bearing installation requirement is to be directly installed on to realize on the sheet metal component and can weld; incorporate the lubricated characteristics of Nonlubricated bearing simultaneously; realize oil-free lubrication; but present sintered metal powder bearing can't satisfy this requirement, causes the prior art products bad adaptability.
Summary of the invention
The objective of the invention is to provide a kind of a kind of weldable sintered metal powder bearing and production technology that realizes solderability and oil-free lubrication or few oil lubrication for the deficiency that solves above-mentioned technology.
In order to achieve the above object, a kind of weldable sintered metal powder bearing that the present invention is designed, its dusty material is formed and is comprised 100 parts of iron powders, and it also comprises 0.5 to 1.2 part of graphite powder, 0.4 to 0.5 part of molybdenum bisuphide, 0.5 to 3 part of copper powder.In forming, dusty material also includes 0.08 part in machine oil.In order to improve self-lubricating property and to guarantee that bearing is indeformable under HTHP, in forming, dusty material also includes the zinc stearate below 0.8 part.For the wearability that guarantees bearing and improve its solderability, the phosphorus content in the bearing completed products is percent nought point four.
The production technology of this weldable sintered metal powder bearing is that the dusty material that will determine prescription evenly mixes, suppression process adopts the one or many filling molding, pressing pressure is at 6 tons/square centimeter to 8 tons/square centimeter, sintering then, 1050 ℃ to 1200 ℃ of sintering temperatures, cool stage by stage, the temperature difference is no more than 200 ℃, multiple again the pressure or fine finishining, multiple pressure pressure can carry out steam treatment or quenching again at 1.2 tons/square centimeter to 2 tons/square centimeter, and the steam treatment temperature can be at 560 ℃ to 700 ℃, last hot dipping oil, temperature is at 20 ℃ to 160 ℃.
The resulting a kind of weldable sintered metal powder bearing of the present invention, by in compound, adding trace elements such as the used graphite of Nonlubricated bearing, zinc stearate, molybdenum bisuphide, guarantee that bearing is indeformable under high temperature, high pressure, less wear realizes not having oil or few oil lubrication.Make the phosphorus content in the powder metallurgy composition, be increased to percent 0.4 by original 0.25 percent, thereby in welding process, be fully burned, can realize oil-free self lubrication or few oil lubrication in the course of work; Can directly weld, change the present situation of sintered metal powder bearing solderability difference; And this weldable sintered metal powder bearing, intensity height, wearability are good, hardness can reach 176 to 332HB stiffness units, the conventional products case hardness can only be in 75 to 96HB stiffness units, need not to add under the condition of lubricating oil, coefficient of friction is less than 0.12, and the compression set amount is less than 0.03 millimeter, and it has very real positive effect to the development of sintered metal powder bearing.
The specific embodiment
The invention will be further described in conjunction with the accompanying drawings below by embodiment.
Embodiment 1:
A kind of weldable sintered metal powder bearing that present embodiment is described, material prescription are to adopt 100 parts of fineness 100 purpose iron powders, 1 part of fineness 200 purpose graphite powder, 0.5 part of molybdenum bisuphide, 3 parts of copper powders.
Embodiment 2:
A kind of weldable sintered metal powder bearing that present embodiment is described, material prescription are to adopt 100 parts of fineness 100 purpose iron powders, 0.5 part of fineness 100 purpose graphite powder, 0.4 part of molybdenum bisuphide, 0.08 part in machine oil, 1 part of copper powder.
Embodiment 3:
A kind of weldable sintered metal powder bearing that present embodiment is described, material prescription are to adopt 100 parts of fineness 100 purpose Anshan water-atomized iron powders, 1 part of fineness 200 purpose graphite powder, 0.5 part of molybdenum bisuphide, 0.08 part in machine oil, 3 parts of copper powders, 0.8 part of zinc stearate; Material is joined special-shaped drum, and rotating speed is adjusted at 40 rev/mins of kinds, rotates 2 hours, mix,, enter net crawler type stove sintering 6 tons of/square centimeter compression mouldings, sintering temperature is controlled at 1050 ℃, the steam treatment temperature can be at 560 ℃-600 ℃, last hot dipping oil, and temperature is at 160 ℃, the bearing that obtains thus, case hardness can reach 80 to 120HB, and crushing strength is greater than 400 MPas, contain oil density 6.8 to 7.2g/cm
3, oil content is greater than 12%.
Embodiment 4:
A kind of weldable sintered metal powder bearing that present embodiment is described, material prescription are to adopt 100 parts of fineness 100 purpose Anshan water-atomized iron powders, 1 part of fineness 100 purpose graphite powder, 0.4 part of molybdenum bisuphide, 0.08 part in machine oil, 1 part of copper powder, 0.6 part of zinc stearate; Material is joined special-shaped drum, rotating speed is adjusted at 40 rev/mins of kinds, rotated 2 hours, and mixed, 8 tons of/square centimeter compression mouldings, enter the push-down sintering furnace, sintering temperature is controlled at 1150 ℃, is incubated 2 hours, and insulation atmosphere is producer gas, come out of the stove water jacket cooling of product, finishing is handled then, and the steam treatment temperature can be at 560 ℃-600 ℃, last hot dipping oil, temperature is at 80 ℃, the bearing that obtains thus, carbon content are 4%, and case hardness can reach 120 to 160HB, crushing strength is greater than 500 MPas, contain oil density 7.0 to 7.4g/cm
3, oil content is at 8%-12%.
Embodiment 5:
A kind of weldable sintered metal powder bearing that present embodiment is described, material prescription are to adopt 100 parts of fineness 120 purpose Anshan water-atomized iron powders, 1.2 parts of fineness 200 purpose graphite powders, 0.4 part of molybdenum bisuphide, 0.08 part in machine oil, 0.4 part of zinc stearate, 1 part of copper powder.Material is joined special-shaped drum, rotating speed is adjusted at 60 rev/mins of kinds, rotated 3 hours, mix,, enter the push-down sintering furnace 8 tons of/square centimeter compression mouldings, sintering temperature is controlled at 1150 ℃, be incubated 2 hours, insulation atmosphere is producer gas, come out of the stove water jacket cooling of product, finishing is handled then, the steam treatment temperature can be at 600 ℃-700 ℃, last hot dipping oil, and temperature is at 20 ℃, the bearing that obtains thus, case hardness can reach greater than 160HB, and crushing strength is greater than 600 MPas, contain oil density 7.2 to 7.4g/cm
3, oil content is at 4%-6%.
Embodiment 6:
A kind of weldable sintered metal powder bearing that present embodiment is described, material prescription are to adopt 98.5 parts of fineness 100 purpose Anshan water-atomized iron powders, 0.5 part of fineness 100 purpose graphite powder, 0.4 part of molybdenum bisuphide, 0.08 part in machine oil, 0.5 part of copper powder; Material is joined special-shaped drum, and rotating speed is adjusted at 60 rev/mins of kinds, rotates 3 hours, mix, 8 tons of/square centimeter compression mouldings, enter the push-down sintering furnace, the steam treatment temperature can be at 560 ℃-600 ℃, last hot dipping oil, temperature is at 100 ℃ of bearings that obtain thus, and carbon content is 4%, and case hardness can reach 60 to 80HB, crushing strength is greater than 400 MPas, contain oil density 6.5 to 7.2g/cm
3, oil content is at 8%-12%.
Claims (6)
1, a kind of weldable sintered metal powder bearing, its dusty material is formed and is comprised 100 parts of iron powders, and feature is: it also comprises 0.5 to 1.2 part of graphite powder, 0.4 to 0.5 part of molybdenum bisuphide, 0.5 to 3 part of copper powder.
2, weldable sintered metal powder bearing according to claim 1 is characterized in that also including 0.08 part in machine oil in dusty material is formed.
3, weldable sintered metal powder bearing according to claim 1 and 2 is characterized in that also including the zinc stearate below 0.8 part in dusty material is formed.
4, weldable sintered metal powder bearing according to claim 1 and 2 is characterized in that the phosphorus content in the finished product is percent nought point four.
5, weldable sintered metal powder bearing according to claim 3 is characterized in that the phosphorus content in the finished product is percent nought point four.
6, the production technology of weldable sintered metal powder bearing according to claim 1, it is characterized in that to determine that the dusty material of filling a prescription evenly mixes, suppression process adopts the one or many filling molding, pressing pressure is at 6 tons/square centimeter to 8 tons/square centimeter, sintering then, 1050 ℃ to 1200 ℃ of sintering temperatures, cool stage by stage, the temperature difference is no more than 200 ℃, multiple again the pressure or fine finishining, and multiple pressure pressure can be at 1.2 tons/square centimeter to 2 tons/square centimeter, can carry out steam treatment or quenching again, the steam treatment temperature can be at 560 ℃ to 700 ℃, last hot dipping oil, and temperature is at 20 ℃ to 160 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100516862A CN100467170C (en) | 2006-05-28 | 2006-05-28 | Weldable sintered metal powder bearing, and its production process |
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| CNB2006100516862A CN100467170C (en) | 2006-05-28 | 2006-05-28 | Weldable sintered metal powder bearing, and its production process |
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| CN1851280A CN1851280A (en) | 2006-10-25 |
| CN100467170C true CN100467170C (en) | 2009-03-11 |
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Cited By (1)
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|---|---|---|---|---|
| CN102921943A (en) * | 2012-10-30 | 2013-02-13 | 南通金巨霸机械有限公司 | Powder metallurgy mechanical part production process |
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| JP4124248B2 (en) * | 1996-07-29 | 2008-07-23 | 日亜化学工業株式会社 | Light emitting device |
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| CN1055397A (en) * | 1991-04-12 | 1991-10-16 | 冶金工业部钢铁研究总院 | Heat-resistant antifriction self-lubricating material and manufacture method thereof |
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| CN1851280A (en) | 2006-10-25 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20061025 Assignee: Jiangxi Hongda Self-lubricating Bearing Co., Ltd. Assignor: Jie Chaokui Contract record no.: 2014360000084 Denomination of invention: Weldable sintered metal powder bearing, and its production process Granted publication date: 20090311 License type: Exclusive License Record date: 20140520 |
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Granted publication date: 20090311 Termination date: 20140528 |