新型Al-Si-Cu-Mg系合金热处理工艺的研究  

Heat treatment process of new Al-Si-Cu-Mg alloy

作　　者：侯立群[1] 陈小辉 邢志媛[1] 李素梅[1] 王旭东[1] 徐瑛[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]东风扬子江汽车(武汉)有限责任公司,湖北武汉430043

出　　处：《兵器材料科学与工程》2013年第6期18-21,共4页Ordnance Material Science and Engineering

基　　金：宁波市第一层次创新团队项目(2011B1004)

摘　　要：为进一步提高ZL111合金的力学特性,满足更高功率发动机缸盖和机体的使用要求,在完成新型Al-Si-Cu-Mg系合金化学成分设计的基础上,采用差热分析、电阻测量、微观组织观察和力学特性测试等研究手段,对新型Al-Si-Cu-Mg系合金热处理工艺进行了深入研究。结果表明,当热处理工艺为490℃×4 h+500℃×6 h+520℃×8 h固溶处理和165℃×9 h时效处理,新型Al-Si-Cu-Mg系合金室温抗拉强度和伸长率分别为340 MPa和2.5%。In order to further improve mechanical properties of ZL111 alloy and satisfy operating requirements of higher power engine cylinder heads and cylinder blocks,the heat treatment processes based on chemical composition design of a new Al-Si-Cu-Mg alloy were studied using differential thermal analysis（DTA）,microstructure observation,electric resistance and mechanical property measurements. The results show that the optimized heat treatment process of the new Al-Si-Cu-Mg alloy is 490℃×4 h＋500℃×6 h＋520℃×8 h solution treatment and 165℃×9 h aging treatment,the ambient ultimate tensile strength and elongation of the heat-treated alloy are 340 MPa and 2.5%,respectively.

关 键 词：Al—Si—Cu—Mg系合金 固溶处理 时效处理 差热分析 

分 类 号：TG146.2[一般工业技术—材料科学与工程]