CN101187398A - Bearing spacer ring made from powder metallurgical material - Google Patents
Bearing spacer ring made from powder metallurgical material Download PDFInfo
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- CN101187398A CN101187398A CNA2007101931250A CN200710193125A CN101187398A CN 101187398 A CN101187398 A CN 101187398A CN A2007101931250 A CNA2007101931250 A CN A2007101931250A CN 200710193125 A CN200710193125 A CN 200710193125A CN 101187398 A CN101187398 A CN 101187398A
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- spacer ring
- sintering
- bearing
- steel
- finishing
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- Powder Metallurgy (AREA)
Abstract
A bearing spacer ring is made from powder metallurgy material which is constituted by the following weight percentages of Cu 1-2%, Cr 0.5-1.5%, Mo 0.5-1%, graphite 0.5-1.0%, and the rest is Fe. The process for the preparation of the spacer ring comprises putting raw powders weighted according to the composition into a ball mill barrel with 2 liters, entering engine oil to dewater, using zinc stearic acid as addition agents, ball milling 2h on a roller-type ball mill, pressing into a shape through a steel die with pressing pressure of five ton/cm 2, sintering in a vacuum furnace with sintering temperature of 1100-1150 DEG C, then preserving heat 1h, and finishing the sintered compact through a finishing die to increase surface fineness and dimensional precision. The invention has favorable mechanical property, physical-chemistry property, in particular to attrition resistance and corrosion resistance property, and dimensional stability ratio at the range of 20-100 DEG C is more stable than 30 # steel, the attrition resistance is 13 times more than the 30 # steel by soft nitrated, and platform test is 4 times more than the 30 # steel.
Description
Technical field
The invention belongs to the material technology field, specially refer to a kind of by spacer ring in the bearing of powdered metallurgical material making.
Background technique
Three class biserial convex symmetrical roller bearings of spacer ring in the band activity, it is a kind of new structure bearing, in recent years, China adopts this structure in a large number, the structural feature of this bearing is except that bearing radial load, axial load in the time of can bearing simultaneously improper the running, simplified processing technology greatly, reduced cost, bearing life also increases, the manufacturing dimension precision difficulty of spacer ring reached during main difficulty was when trial-production and production 3-class bearing at present, wear resistance is low, and middle spacer ring belongs to thin-wall part, can bring problem on deformation under the cold and hot working situation, up to 15%, dimensional accuracy does not reach when scrapping main cause at the mounting shop reject rate.Stock utilization is 20～23%, and production process is 20～22 roads, and particularly nitrocarburizing is handled and adopted urea to cook nitridizing agent, and the cyanide that decomposites under this temperature is harmful to human body and surrounding environment, and nitride layer as thin as a wafer, and less than 5 μ m, wear resistance is low.
Summary of the invention
For addressing the above problem, the present invention has designed a kind of by spacer ring in the bearing of powdered metallurgical material making, its mechanical property, physical and chemical performance, and wear-resisting especially, fine corrosion resistance, the dimensional stability in 20～100 ℃ of scopes is more stable than 30# steel; Its wear resistance is higher 13 times through nitrocarburizing than 30# steel, and stand test is higher 4 times than 30# steel.
For achieving the above object, the present invention has adopted following technological scheme:
Described by spacer ring in the bearing of powdered metallurgical material making, its powdered metallurgical material is constructed as follows by weight percentage:
Cu 1～2%; Cr 0.5～1.5%; Mo 0.5～1%; Graphite 0.5～1.0%; Surplus is Fe;
Spacer ring is stated thereon to constitute down and is formed spacer ring in the bearing through mixing → shaping → sintering → finishing in the described bearing of being made by powdered metallurgical material, and each operation division is as follows:
I, mixing
Take by weighing material powder by proportioning, put into 2 liters of ball milling buckets and add the machine oil dehydration, zine stearate carries out ball milling 2h as additive on the roll-type pebble mill;
II, shaping
The punching block press forming, pressing pressure: 5 tons/cm
2
III, sintering
Sintering in vacuum furnace, 1100～1150 ℃ of sintering temperatures, insulation 1h;
IV, finishing
Sintered blank is passed through the die finish finishing again, improve surface finishment and dimensional accuracy.
Because adopt aforesaid technological scheme, the present invention has following superiority:
1, there are a large amount of holes in the material internal that uses, can store lubricant oil, under the bearing operation situation, because the lubricant oil that temperature rise discharges in the hole is realized lubricated.When shutting down, lubricant oil sucks back hole, and forms one deck oil film on middle spacer ring surface, adds under Oil Lubrication Condition under the selflubricating double action oily in the hole and improves material wear ability.
2, select 5T/cm
2Pressing pressure, green density is similar to sintered density, is being lower than sintering under the alloying constituent constituent element fusing point, relies on the diffusion of alloying element atom, migration, solid solution to reach sintering densification.
3, spacer ring raw material source is easy in the sintered metal powder bearing, and manufacturing process is easy, is convenient to produce in enormous quantities.
4, spacer ring mechanical property, physical and chemical performance in the sintered metal powder bearing, wear-resisting especially, fine corrosion resistance.
5, the spacer ring sintering in carburizing atmosphere that suits in the sintered metal powder bearing, its structure is the same with Aktiebolaget SKF's sample with section, is α Fe, FeC
3, belong to fragility and rupture along crystalline substance.
6, the dimensional stability of spacer ring in 20～100 ℃ of scopes is more stable than 30# steel in the sintered metal powder bearing; Its wear resistance is higher 13 times through nitrocarburizing than 30# steel, and stand test is higher 4 times than 30# steel.
7, spacer ring satisfies the main frame requirement working life through site test in the sintered metal powder bearing.
Embodiment
Embodiment 1:
The employed powdered metallurgical material of spacer ring constitutes by weight percentage in the bearing: 1%Cu+0.5%Cr+0.5%Mo+1% graphite, surplus are Fe.
Take by weighing material powder by above-mentioned formation, put into 2 liters of ball milling buckets and add the machine oil dehydration, zine stearate carries out ball milling 2h as additive on the roll-type pebble mill;
The punching block press forming, pressing pressure: 5 tons/cm
2Suppression process control material porosity 18%～20%, make this material have unique surface structure, in sintering process, stay perforate, under capillarity, store lubricant oil, in the bearing operation process, because temperature rise, the lubricant oil that discharges in the hole is realized lubricated, when shutting down, oil sucks back in the hole, and forms one deck oil film on middle spacer ring surface;
Sintering: equipment is vacuum furnace, 1100～1150 ℃ of sintering temperatures, insulation 1h; Sintered density is equal to pressed density substantially, the unique surface structure that reserved materials has in pressing process;
Sintered blank is passed through the die finish finishing again, improve surface finishment and dimensional accuracy.
Embodiment 2:
The employed powdered metallurgical material of spacer ring constitutes by weight percentage in the bearing: 2%Cu+1.5%Cr+1%Mo+0.5% graphite, surplus are Fe;
Take by weighing material powder by above-mentioned formation, put into 2 liters of ball milling buckets and add the machine oil dehydration, zine stearate carries out ball milling 2h as additive on the roll-type pebble mill;
The punching block press forming, pressing pressure: 5 tons/cm
2Suppression process control material porosity 18%～20%, make this material have unique surface structure, in sintering process, stay perforate, under capillarity, store lubricant oil, in the bearing operation process, because temperature rise, the lubricant oil that discharges in the hole is realized lubricated, when shutting down, oil sucks back in the hole, and forms one deck oil film on middle spacer ring surface;
Sintering: equipment is vacuum furnace, 1100～1150 ℃ of sintering temperatures, insulation 1h; Sintered density is equal to pressed density substantially, the unique surface structure that reserved materials has in pressing process;
Sintered blank is passed through the die finish finishing again, improve surface finishment and dimensional accuracy.
Embodiment 3:
The employed powdered metallurgical material of spacer ring constitutes by weight percentage in the bearing: 1%Cu+0.5%Cr+0.5%Mo+0.5% graphite, surplus are Fe;
Take by weighing material powder by above-mentioned formation, put into 2 liters of ball milling buckets and add the machine oil dehydration, zine stearate carries out ball milling 2h as additive on the roll-type pebble mill;
The punching block press forming, pressing pressure: 5 tons/cm
2Suppression process control material porosity 18%～20%, make this material have unique surface structure, in sintering process, stay perforate, under capillarity, store lubricant oil, in the bearing operation process, because temperature rise, the lubricant oil that discharges in the hole is realized lubricated, when shutting down, oil sucks back in the hole, and forms one deck oil film on middle spacer ring surface;
Sintering: equipment is vacuum furnace, 1100～1150 ℃ of sintering temperatures, insulation 1h; Sintered density is equal to pressed density substantially, the unique surface structure that reserved materials has in pressing process;
Sintered blank is passed through the die finish finishing again, improve surface finishment and dimensional accuracy.
Claims (2)
1. spacer ring in the bearing of making by powdered metallurgical material, it is characterized in that: this powdered metallurgical material is constructed as follows by weight percentage:
Cu 1～2%; Cr 0.5～1.5%; Mo 0.5～1%; Graphite 0.5～1.0%; Surplus is Fe.
2. as claimed in claim 1 by spacer ring in the bearing of powdered metallurgical material making, it is characterized in that: form spacer ring in the bearing through mixing → shaping → sintering → finishing under above-mentioned formation, each operation division is as follows:
I, mixing
Take by weighing material powder by proportioning, put into 2 liters of ball milling buckets and add the machine oil dehydration, zine stearate carries out ball milling 2h as additive on the roll-type pebble mill;
II, shaping
The punching block press forming, pressing pressure: 5 tons/cm
2
III, sintering
Sintering in vacuum furnace, 1100～1150 ℃ of sintering temperatures, insulation 1h;
IV, finishing
Sintered blank is passed through the die finish finishing again, improve surface finishment and dimensional accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101931250A CN100540926C (en) | 2007-11-30 | 2007-11-30 | A kind of by spacer ring in the bearing of powdered metallurgical material making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101931250A CN100540926C (en) | 2007-11-30 | 2007-11-30 | A kind of by spacer ring in the bearing of powdered metallurgical material making |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101187398A true CN101187398A (en) | 2008-05-28 |
| CN100540926C CN100540926C (en) | 2009-09-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101931250A Expired - Fee Related CN100540926C (en) | 2007-11-30 | 2007-11-30 | A kind of by spacer ring in the bearing of powdered metallurgical material making |
Country Status (1)
| Country | Link |
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| CN (1) | CN100540926C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709412B (en) * | 2009-12-10 | 2012-01-04 | 洛阳轴研科技股份有限公司 | Nickel-based bearing retainer material and preparation method thereof |
| CN101704102B (en) * | 2009-11-30 | 2012-09-26 | 长春工业大学 | High-performance powder metallurgy material and preparation method thereof |
| CN103469047A (en) * | 2013-09-17 | 2013-12-25 | 北京科技大学 | Ceramimetallurgical preparation method of high-corrosion resistance weathering steel |
| CN107761003A (en) * | 2017-09-20 | 2018-03-06 | 上海汽车粉末冶金有限公司 | The powder metallurgy sintered method of bearing cap |
-
2007
- 2007-11-30 CN CNB2007101931250A patent/CN100540926C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704102B (en) * | 2009-11-30 | 2012-09-26 | 长春工业大学 | High-performance powder metallurgy material and preparation method thereof |
| CN101709412B (en) * | 2009-12-10 | 2012-01-04 | 洛阳轴研科技股份有限公司 | Nickel-based bearing retainer material and preparation method thereof |
| CN103469047A (en) * | 2013-09-17 | 2013-12-25 | 北京科技大学 | Ceramimetallurgical preparation method of high-corrosion resistance weathering steel |
| CN103469047B (en) * | 2013-09-17 | 2015-10-28 | 北京科技大学 | A kind of method for preparing powder metallurgy of high anti-corrosion weathering steel |
| CN107761003A (en) * | 2017-09-20 | 2018-03-06 | 上海汽车粉末冶金有限公司 | The powder metallurgy sintered method of bearing cap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100540926C (en) | 2009-09-16 |
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Effective date of registration: 20180509 Address after: 471000 No. 1 axis research road, Jianxi science and Technology Industrial Park, Luoyang, Henan Patentee after: Luoyang Bearing Research Institute Address before: No. 1, Jilin Road, Luoyang, Henan, Henan Patentee before: Zhouyan Science and Technology Co., Ltd., Luoyang |
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Granted publication date: 20090916 Termination date: 20201130 |
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