液固两相区等温处理对爱AI-MG-Si合金力学性能的影响  

Effect of the Isothermal Treatment in the Semi-solid State of Al-Mg-Si Alloy on Mechanics Properties

作　　者：熊军[1] 杨湘杰[1] 刘勇[1] 

机构地区：[1]南昌大学机电工程学院

出　　处：《铸造》2003年第9期691-694,共4页Foundry

基　　金：江西省自然科学基金资助项目(0250006)

摘　　要：研究了Al Mg Si合金在液固两相区之间不同加热温度、不同保温时间对力学性能的影响 ,结果表明 ,在同一保温时间下合金的力学性能随着加热温度的升高抗压强度和屈服强度会有一定的提高 ,而在等温下随着保温时间的增加力学性能先略有提高随后快速下降 ,原因是保温时间会使晶粒的尺寸先细化然后又逐渐长大 ,使得晶粒间的结合程度减小。通过分析不同温度、不同保温时间的材料显微组织 。The effects of the isothermal treatment in the state of semisolid of AlMgSi alloy on mechanics properties have been studied on this paper.The result indicates that the mechanics properties of alloycompression strength and yield stress will obtain some improvement with the increasing of temperature in the same of holding time,but little increase first and then speedily decrease with the increasing of holding time in the same of temperature,which is caused by the decrease of combined degree between crystals for the dimension of crystal would first became thin then gradually grew up with the increasing of holding time. One technics project for optimized mechanics properties of this alloy had been made through the analysis of microstructures of different temperature and holding time.

关 键 词：等温处理 力学性能 微观组织 Al—Mg—Si合金 

分 类 号：TG166.3[金属学及工艺—热处理] TG292[金属学及工艺—金属学]