挤压铸造超高强Al-Zn-Mg-Cu-Zr-Sc合金的热处理工艺研究  

Study on Heat Treatment Process of Cast Al-Zn-Mg-Cu-Zr-Sc Alloy

作　　者：涂强[1] 杨福宝[1] 徐骏[1] 张志峰[1] 

机构地区：[1]北京有色金属研究总院加工事业部,北京100088

出　　处：《热加工工艺》2011年第12期155-159,共5页Hot Working Technology

摘　　要：通过EDS、OM、SEM、TEM和常温拉伸等分析测试手段对挤压铸造Al-Zn-Mg-Cu-Zr-Sc合金的组织特征及在不同热处理制度下的组织状态与力学性能进行了研究。结果表明,挤压铸造Al-Zn-Mg-Cu-Zr-Sc合金经460℃×24 h+470℃×8h+480℃×2h三级强化固溶、120℃×24h单级时效处理,抗拉强度达到597MPa,伸长率达到13.2%。The microstructure evolution and mechanical properties of the squeeze cast Al-Zn-Mg-Cu-Zr-Sc alloy after different heat treatment were studied by EDS,OM,SEM,TEM and room temperature tensile testing.The results show that after 460 ℃× 24 h ＋ 470 ℃× 8 h ＋ 480 ℃× 2 h multi-stage solution,and 120 ℃× 24 h T6 aging treatment,the tensile strength can reach 597 MPa,the extension rate is more than 13.2%.An ultra-high strength cast aluminum alloy with fine comprehensive performance can be obtained.

关 键 词：挤压铸造 AL-ZN-MG-CU合金 强化固溶 力学性能 

分 类 号：TG156.92[金属学及工艺—热处理]