压铸A380合金力学性能和热处理工艺性能研究.pdf

学兔兔 铸 造 Feb．2012 · 152· FOUNDRY V0I．61 NO．2 压铸A380合金力学性能及热处理工艺性能研究 程晓宇‘．一，熊守关 ，CHOU Hsin—nan3 (1．陕西国防工业职业技术学院，陕西西安710302；2．先进成形制造教育部重点实验室， 清华大学机械工程系，北京100084；3．TIle Boeing Company，M063166，USA) 摘要：以A380压铸铝合金为研究对象，设计了压铸工艺参数，并对压铸件进行了热处理试验。通过密度测定、力学 性能测试和金相观察，分析了压铸工艺参数对铸件性能的影响规律，探求了热处理对压铸件性能的影响。研究表明： 压力增加，铸件的密度和强度增加；压力一定时，低速速度对铸件力学性能的影响大于高速速度；压铸工艺改进可进 一 步提高材料的性能，抗拉强度接近365 M a，伸长率可达4．2％；合理的固溶+低温时效处理后，材料具有更高的综合 力学性能，屈服强度达205 MPa，抗拉强度394 MPa，伸长率可达7．8％。 关键词：压铸；A380合金；力学性能；热处理 中图分类号：TG146．22；TG292 文献标识码：A 文章编号：1001-4977(2012)02—0152—04 Study on Mechanical Properties and Heat Treatment Process of Die—Cast A380 Alloy CHENG Xiao-Yu 2’XIONG Shou-Mei ，CHOU Hsin-nan (1．Shaanxi Institute ofTechnology,Xi'an 710302，Shaanxi，China；2．Department ofMechanical Engineering， Tsinghua University,Beijing 100084，China；3．The Boeing Company,MO63166，USA) Abstract： Die casting experiments were conducted to study the influence of process parameters on mechanical properties of A3 80 alloy by means of density measurement，mechanical properties tests and microstructure analysis．The influence of heat treatment process on the mechanical properties of die-cast A3 80 alloy was also investigated．The results show that with the increase of the fast shot speed and the casting pressure，the density and tensile strength of A3 80 alloy increase；the slow shot phase has a great influence on the mechanical properties and by appropriate selection of the slow shot phase parameters，the die—cast A80 alloy can reach a tensile strength of 365 MPa and an elongatio