侯文胜,陈刚,孙广东,赵玉涛,余莹,徐勇华

• 1:江苏大学材料科学与工程学院

摘要(Abstract)：

以Al-20Si合金为基体,加入质量分数为2%的还原铁粉原位反应得到Al-Si-Fe/Al-20Si复合材料,研究了稀土Y含量为0.01%、0.1%、0.2%、0.3%对复合材料铸态和热处理后组织及性能的影响。结果表明:复合材料中的增强相为Al-Si-Fe金属间化合物,当Y含量为0.1%时对复合材料的变质效果最佳,富铁相成由细针状转变为鱼骨状且分布均匀,抗拉强度和伸长率与变质后基体相比分别提高了19.4%和20%,再经过550℃固溶处理和120℃时效处理后富铁相转变为短棒状或块状,与铸态相比抗拉强度和伸长率分别提高了8.4%和30%。

关键词(KeyWords)： Al-20Si;富铁相;热处理;稀土Y

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50971066、51174098);; 江苏省高校科研成果产业化推进工程项目(JH09-37);; 江苏省高校自然科学研究重大项目(10KJA430008);; 江苏省科技支撑项目(BE2012135);; 江苏省高校优势学科建设工程资助项目

作者(Author): 侯文胜,陈刚,孙广东,赵玉涛,余莹,徐勇华

DOI: 10.13289/j.issn.1009-6264.2013.06.004

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