Powder metallurgy Fe-Cu-Sn oil-retaining bearing and manufacturing technique thereof

A technology of powder metallurgy and production process, applied in the field of powder metallurgy, can solve the problems of high cost, small friction coefficient, low copper content, etc., and achieve the effects of improved performance, self-lubricating performance, and low friction coefficient

Inactive Publication Date: 2008-01-23
包敢锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the shortage of non-ferrous metal resources, because iron-copper oil bearings contain 20% copper, the cost is high, so it is necessary to develop a bearing with low copper content, high strength of finished bearings, high oil content and small friction coefficient. New oil-impregnated bearing material

Method used

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Embodiment Construction

[0021] The present invention relates to a powder metallurgy Fe-Cu-Sn oil-impregnated bearing and its production process. It uses reduced Fe powder (-100 mesh) and Cu-Sn powder (-325 mesh) to mix to form copper infiltrating agent base powder. When used, it is mixed with the lubricant lithium stearate and molded into an oil-impregnated bearing compact with a porosity of 20-30%, then sintered at 890°C for 20 minutes, and finally the sintered compact is finished and impregnated with lubricating oil before use. The specific formula is: reduced Fe powder (-100 mesh) 97.5%, Cu-Sn powder (-325 mesh) 2.5%, lithium stearate 8%, wherein Cu:Sn=7:3 in the Cu-Sn alloy.

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Abstract

The invention relates to a powder metallurgy Fe-Cu-Sn oil-retained bearing and the production process for the bearing. The bearing essentially comprises the following raw materials by weight: -100 mesh reduction Fe powder 96.5 swung dash 98%, -325 mesh Cu-Sn powder 2 swung dash 3.5%, lithium stearate 0.6 swung dash 1.0%. Wherein, in Cu-Sn alloy, Cu:Sn=7:2.5 swung dash 3.5 by weight. The production process is: weighing -100 mesh reduction Fe powder, -325 mesh Cu-Sn powder and lithium stearate by proper proportions; mixing them in a double-conic mixer at 19 swung dash 21r/min for 30-35 min; pressing the mixture under 300MPa swung dash 450MPa into blanks for oil-retained bearing; sintering the pressed blanks for 20-30 min under 880 swung dash 900 Celsius system, so sintered blanks are obtained; finishing and soaking by lubricating oil. The invention is of high strength, high oil content, low friction coefficient, low copper content, low material cost and process cost.

Description

technical field [0001] The invention relates to a bearing, in particular to a powder metallurgy Fe-Cu-Sn oil bearing and a production process thereof. It belongs to the technical field of powder metallurgy. Background technique [0002] Powder metallurgy oil-impregnated bearings occupy an important position in the national economy because of their unique self-lubricating properties and damping properties. According to the base material, it can be roughly divided into bronze oil bearing, iron-bronze oil bearing, iron-graphite oil bearing, iron-carbon oil bearing, iron-copper oil bearing and iron-copper-carbon oil bearing. Among them, iron-graphite oil-impregnated bearings, iron-carbon oil-impregnated bearings and iron-copper-carbon oil-impregnated bearings have low cost of raw materials, but because of high operating noise, high friction coefficient and low corrosion resistance, their applications are greatly limited; bronze oil-impregnated bearings , and its series of iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/12F16C33/14
Inventor 包敢锋龙斌
Owner 包敢锋
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