Thixoforming of spray deposited AlZn 12Cu2Mg2 wrought aluminum alloy in semi-solid state
(1.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China3.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China)
Abstract: The processing parameters were achieved about the thixoforming of spray deposition AlZn 12Cu2Mg2 wrought aluminum alloy in semi-solid ingots and the structures and mechanical properties of the analogue work pieces were tested. The optimum heat treatment parameters of the alloy by the optimization experiment were obtained （460℃ being the optimum solution temperature and 12-14h being the optimum artificial aging time）. The results show that AlZn 12Cu2Mg2 alloy can achieve ideal mechanical properties and elongation after solution treatment and aging treatment by semi-solid process. Under 120MPa and at 595-600℃, the yield strength and elongation of the heat-treated parts can reach 664MPa and 7.5% respectively.
Key words: AlZn 12Cu2Mg2 alloy； thixoforming； spray deposition； semi solid process