塑性变形对搅拌铸造铝-铅轴承合金组织和性能的影响  

Microstructure and Properties of Deformed Cast Al-Pb Bearing Alloys

作　　者：孙大仁[1] 王连武[1] 刘勇兵[1] 岳鸿儒 

机构地区：[1]吉林大学材料科学与工程学院汽车材料教育部重点实验室,吉林长春130025 [2]北京汽车摩托车联合制造公司,北京100020

出　　处：《机械工程材料》2003年第8期31-33,共3页Materials For Mechanical Engineering

基　　金：博士学科点基金资助项目(1999018513)

摘　　要：用一种新的铸造技术生产系列铸造铝铅轴承合金,含铅量的变化范围从0%～25%。研究了轧制后铝铅合金的显微组织和力学性能随铅含量的变化规律,与铸态相对比结果表明,变形合金的铅颗粒和硅颗粒被大幅度细化,其分布明显改善;变形后合金的抗拉强度和伸长率明显高于铸态合金。A new technology was applied to produce series of stircast AlPb alloys with lead contents from 0 to 25 wt%. Microstructures and mechanical properties of asrolled AlPb alloys have been investigated. The results show that both lead and silicon particles are refined significantly and distribution of lead and silicon particles is improved evidently. As the content of lead increases,the mechanical properties (UTS and elongation) tend to decrease. However,the values of UTS and elongation of asrolled AlPb alloys are higher than those of ascast AlPb alloys. Analysis of fracture surfaces indicates that with an increase in lead content, the feature of fractures of the samples changes from ductile to brittle.

关 键 词：铸造铝铅合金 塑性变形 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG249.9[金属学及工艺—金属材料]