摘要
研究了热处理对Al-10Si-3Cu-0.3Mg-0.2Er合金的显微组织和低温力学性能的影响。结果表明,经过525℃×6 h固溶+180℃×6 h时效的T6热处理后,在低温(-60℃)下拉伸时,合金中位错滑移所受内部阻力增大而阻碍其进一步滑动,使合金的强度升高而伸长率略微降低。T6热处理显著改善了合金中第二相的形貌及分布,较粗大第二相固溶入基体,时效阶段弥散析出,使合金力学性能提高。
The effects of heat treatment on the microstructure and low-temperature mechanical properties of the Al-10Si-3Cu-0.3Mg-0.2Er alloy were investigated. The results show that after the T6 heat treatment of 525 °C ×6 h solid solution + 180 °C×6 h aging, the internal resistance to dislocation sliding in the alloy increases and hinders its further sliding when it is stretched at low temperature(-60 ℃), resulting in an increase in strength and a slight decrease in elongation of the alloy. T6 heat treatment significantly improves the morphology and distribution of the second phase in the alloy, the coarse second phase dissolves into the matrix and precipitates in the subsequent aging stage. These changes in the second phase improve the mechanical properties of the alloy.
作者
张惠帝
马昌龙
郝建飞
吴惠舒
陈斌
陈明
李卫荣
李润霞
ZHANG Hui-di;MA Chang-long;HAO Jian-fei;WU Hui-shu;CHEN Bin;CHEN Ming;LI Weirong;LI Run-xia(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,Liaoning,China;School of Materials Science and Engineering,Dongguan University of Technology,Dongguan 523000,Guangdong,China;Qingniao Technology Co.,Ltd.,Dongguan 523000,Guangdong,China;Dongguan Yi'an Technology Co.,Ltd.,Dongguan 523000,Guangdong,China)
出处
《铸造》
CAS
北大核心
2023年第1期44-48,共5页
Foundry
基金
国家自然科学基金面上项目(51974092)
东莞市科技特派员项目(20201800500092,20221800500773)
新型铝合金开发项目(2020ZDZX2016)
广东省重点实验室项目(2021B1212050001)。
关键词
铸造AL-SI合金
热处理
低温拉伸性能
显微组织
cast Al-Si alloy
heat treatment
low temperature tensile properties
microstructure
