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稀土Er对A356合金组织与性能的影响

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Indexed by:期刊论文

Date of Publication:2018-01-01

Journal:特种铸造及有色合金

Included Journals:CSCD

Volume:38

Issue:3

Page Number:312-315

ISSN No.:1001-2249

Key Words:Er;A356合金;微观组织;力学性能

Abstract:利用金相显微镜、扫描电镜和拉伸试验机研究了Er元素对A356合金组织与性能的影响,并分析了其变质机制.结果表明,Er元素可以改善与共晶Si的形貌,得到短杆状共晶Si.当Er含量为0.3%时合金的力学性能最好.经T6热处理后,合金抗拉强度提高了31.2%,伸长率提高了233%.

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