Preparation method for Al2O3 dispersion strengthened copper-based oil bearing

A technology of dispersion strengthened copper and dispersed copper, which is applied in the field of powder metallurgy, can solve problems such as low strength, poor wear resistance, and poor precision, and achieve excellent strength, excellent mechanical properties, and small dimensional changes
CN107282932AActive Publication Date: 2017-10-24GUANGDONG INST OF MATERIALS & PROCESSING +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG INST OF MATERIALS & PROCESSING
Publication Date
2017-10-24
Patent Text Reader

Abstract

A preparation method for an Al2O3 dispersion strengthened copper-based oil bearing comprises the steps that Al2O3 dispersion copper alloy powder and tin powder are mixed proportionally and evenly; mixed powder is subjected to diffusion alloying treatment, and Al2O3 dispersion strengthened copper-tin diffusion alloying powder is obtained after crushing, screening and blending; the obtained diffusion alloying powder is subjected to die forming, and a bearing green body is prepared; and the obtained bearing green body is sintered and then subjected to oil immersion and finishing, and the Al2O3 dispersion strengthened copper-based oil bearing is obtained. The dispersion strengthened copper-based oil bearing prepared through the method has the good strength, hardness and precision, the defects that existing bronze oil bearings are low in strength, poor in abrasion resistance, low in precision and the like commonly are overcome, and the method is suitable for scale production.
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Description

technical field

[0001] The invention relates to a preparation method of a copper-based oil-impregnated bearing, in particular to an Al 2 o 3 The invention discloses a method for preparing a dispersion-strengthened copper-based oil bearing, which belongs to the technical field of powder metallurgy. Background technique

[0002] Bearings are the basis of transmission and an indispensable component in the machinery industry. Where there is machinery, there is rotation; where there is rotation, bearings are needed. Oil-impregnated bearings mainly include iron-based and copper-based. Among them, sintered bronze (Cu-Sn) oil-impregnated bearings have excellent corrosion resistance and mechanical properties, high thermal conductivity, and long service life. They have been widely used in aerospace , automobiles, electronic equipment, office equipment and precision machinery and other fields. According to statistics, more than 55% of the world's copper powder is used to make oil-i...

Claims

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