Powder metallurgy high-strength bearing material and preparation method thereof

A bearing material and powder metallurgy technology, applied in the field of powder metallurgy, can solve problems such as gaps, achieve improved corrosion resistance, good high and low temperature stability, and improve the effect of easy adhesion

Inactive Publication Date: 2016-10-26
HEFEI ZHENGHAO MECHANICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although aluminum-based bearing materials have many excellent properties, there is still a big gap from practical application due to the limitations of aluminum-based powder metallurgy. Due to the problems in the manufacturing process, the quality of fired products needs to be improved, and further Improve performance Mass production expand its range of applications

Method used

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Embodiment Construction

[0014] A powder metallurgy high-hardness bearing material and a preparation method thereof are prepared from the following raw materials in parts by weight (kg): aluminum 85, iron 5, copper 3, silicon 1, magnesium 0.5, polytetrafluoroethylene powder 3, molybdenum disulfide 0.8, stearic acid 2, methyl cellulose 0.6, graphite 1, pine sawdust 1, yttrium oxide 0.3, carbon microspheres 0.8, appropriate amount of oleic acid;

[0015] The powder metallurgy high-hardness bearing material and its preparation method are prepared by the following specific steps:

[0016] (1) Pour aluminum, iron, copper, magnesium and silicon powder into a mortar to grind and mix evenly, then add the mixed powder to a ball mill, add an appropriate amount of alcohol for wet ball milling, and the ball milling speed is 20 rpm. After ball milling for 1 hour, add the mixed powder to a vacuum drying oven, dry it at 70°C, and place it for later use;

[0017] (2) mixing oleic acid and graphite into an ultrasonic...

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PUM

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Abstract

The invention discloses a powder metallurgy high-strength bearing material and a preparation method thereof. The powder metallurgy high-strength bearing material is prepared from the following raw materials of, by weight, 85-90 parts of aluminum, 5-8 parts of iron, 3-4 parts of copper, 1-2 parts of silicon, 0.5-1 parts of magnesium, 3-4 parts of polytetrafluoroethylene powder, 0.8-1.5 parts of molybdenum disulfide, 2-3 parts of stearic acid, 0.6-1 part of methyl cellulose, 1-1.5 parts of graphite, 1-2 parts of pine sawdust, 0.3-0.4 part of yttrium oxide, 0.8-1.5 parts of carbon microspheres and an appropriate amount of oleic acid. The bearing material prepared through the preparation method has the characteristics such as smaller particle size, uniform distribution, high hardness, high flexure strength, high fracture toughness and good high-low-temperature stability, and is worth popularizing.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a powder metallurgy high-hardness bearing material and a preparation method thereof. Background technique [0002] Metal sintered oil-impregnated bearing is a kind of sintered material made by powder metallurgy process with metal powder as raw material. Metal sintered oil-containing products are inherently porous and have the advantage that the number, size and distribution of voids can be freely adjusted during the manufacturing process. Sintered metal oil-impregnated bearings have been widely used in automobiles, home appliances, transportation machinery, agricultural machinery, instrumentation and many other fields. The sintered metal oil-impregnated bearings mainly used in modern industry can be divided into copper-based, iron-based, copper-iron-based and so on according to the base material. Aluminum is one of the most widely distributed elements in the earth's c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/02B22F3/10C22C1/05C22C21/00C22C32/00C22C1/10
CPCB22F1/0003B22F3/02B22F3/1007C22C1/05C22C21/00C22C32/001C22C32/0084C22C32/0094
Inventor 郑之松
Owner HEFEI ZHENGHAO MECHANICAL TECH
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