半固态成形制备铝铅难混溶合金  

Research on Al-Pb Immiscible Alloy Synthesized by Semi-Solid Forming Technology

作　　者：刘明伟[1] 陈体军[1,2] 刘二勇[1] 张素卿[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050

出　　处：《中国铸造装备与技术》2011年第2期20-23,共4页China Foundry Machinery & Technology

摘　　要：通过机械搅拌半固态成形技术制备铝铅系难混溶合金。研究了温度对该合金铅颗粒晶粒尺寸和分布及固相率的影响。微观结构观察表明:通过强力的机械搅拌,可以把铝铅合金中的铅颗粒弥散均匀分布于基体合金中。随着温度的降低:合金的固相率增大,从630℃开始凝固到585℃合金固相率升到67%,呈非线性变化;初生α-Al颗粒在机械搅拌的作用下变得圆整;铅颗粒粒度趋于减小,分布分布趋于均匀、一致,与温度之间同样呈非线性变化;合金中铅含量测试表明,铅的含量处于5.80%左右。说明可利用机械搅拌结合半固态成形技术制备铝铅系难混溶合金。Al-Pb alloy immiscible mixing has been synthesized by mechanical agitation technology combined with preparation of semi-solid forming technology and the temperature impact on the lead particles grain size, distribution and solid fraction of alloys have been researched. Microstructure observation showed that lead particles of Al-Pb alloy could distributed homogeneously with the matrix alloy by strong mechanical agitation. The solid fraction increased with the temperature decreased. The solid fraction up to 67.1% from coagulating at 630℃ to 585℃ and showed a nonlinear change. The primary G-Al particles became round under the effect of mechanical agitation; Lead particle size tended to reduce and its distribution to uniform, and also showed a nonlinear change with the temperature. Test on the lead content of alloy showed that lead content was about 5.80. Al-Pb alloy mixing capacity could synthesized by mechanical agitation combined with preparation of semi-solid forming technology.

关 键 词：半固态成型 铝铅合金 机械搅拌 温度 固相率 

分 类 号：TG27[金属学及工艺—铸造]