Al-Si-Cu-Zn压铸铝合金的显微组织及拉伸性能.pdfVIP

学兔兔 铸 造 May 2009 · 450· F0uNDRY VoI．58 No．5 Al…Si Cu Zn压铸铝合金的显微组织及拉伸性能 李 锋，王 珏，车 欣，陈立佳 (沈阳工业大学材料科学与工程学院，辽宁沈阳110178) 摘要：针对不同处理状态AI—Si—Cu．Zn压铸铝合金的显微组织及拉伸变形行为进行研究，并与重力铸造Al—si—Cu-Zn合金 进行比较。结果表明，压铸态Al—si．cu．zn合金的组织更为细小；与重力铸造Al—si—Cu—zn合金相比，压铸态Al—Si-Cu—zn 合金的室温抗拉强度可提高27％左右，室温屈服强度可提高18％左右，在室温、150℃和200℃下的断裂伸长率可分别 提高约72％、86％和90％；固溶处理导致Al—Si—Cu．Zn压铸铝合金的拉伸性能降低；A1-Si—Cu—Zn压铸铝合金在拉伸加载条 件下主要发生韧性断裂。 关键词：压铸；A1．si．cu—zn铝合金；固溶处理；显微组织；拉伸性能 中图分类号：TG249．2 文献标识码：A 文章编号：1001—4977(2009)05—0450—04 Microstructure and Tensile Properties Of Die．Cast ACtUreS and ensile ropertiesOT L-)Ie- AII．S_-C 一 I—L一，U—Zn一 AIUminUm Alloy Ll Feng，WANG Jue，CHE Xin，CHEN Li-jia (School of Materials Science and Engineering，Shenyang University of Technology， Shenyang 1 10178，Liaoning，China) Abstract：The microstructures and tensile behaviors of the die—cast AI—S_．Cu-Zn alloy in different states were investigated and compared with those of the gravity-cast Al—Si—Cu-Zn alloy．The results show that the microstructure of the die—cast AI．S_-Cu．Zn alloy ls much finer。The strengths of the A1．S--Cu．Zn alloy in different states reduce while the elongation increases with increasing test temperature．Compared with the gravity-cast AI-Si—Cu—Zn alloy．the ultimate strength of the die—cast AI．S．-Cu．Zn alloy at room temperature increased by 27．3％ and the yield strength by 18．1％．The solution treatment Ieads to a decrease in the tensile properties of the die—cast AI—S_-Cu—Zn alloy．Under the tensile loading condition．the die—cast AI．S--Cu．Zn alloy mainly exhibits the