熔体混合法制备Al-22%Si合金的组织和性能研究  

Microstructures and Properties of Al- 22%Si alloy Prepared with Melt Mixing

作　　者：李海凤[1] 吴伟[1] 李艳霞[1] 卢彦云 

机构地区：[1]北华航天工业学院材料工程学院,河北廊坊065000 [2]中油管道检测技术有限责任公司,河北廊坊065000

出　　处：《北华航天工业学院学报》2015年第5期8-11,共4页Journal of North China Institute of Aerospace Engineering

基　　金：河北省科技支撑计划项目(13211034);北华航天工业学院博士科研基金项目(BKY201305)

摘　　要：本研究采用熔体混合法制备了Al-22wt.%Si合金,通过正交设计实验方法,研究了高温熔体过热温度、低温熔体过热温度及混合保温时间对合金显微组织和性能的影响。研究结果表明,高温熔体过热温度对初生硅相的平均直径影响最大,其次为混合保温时间,而低温熔体过热温度的影响最小。正交实验获得最佳制备工艺参数为:高温过热温度1000℃,低温过热温度850℃,混合保温时间30min,此时初生硅平均直径最小,为24.96μm,分布均匀,形态规整,合金布氏硬度最大为116.3HB,相对耐磨性提高近40%。Al- 22 wt. % Si alloy was prepared with melt mixing,and effects of high low temperature melt and mixing time on microstructures and properties were studied by orthogonal design testing. The results showed that high temperature melt had maximum influence on primary Si diameter,the mixing time secondly,while low temperature melt had minimum influence. The optimum scheme was high temperature melt of 1000℃,low temperature melt of 850℃ and mixing time of 30 min. The primary Si with regular shape distributed minimum average diameter of 24. 96μm. The maximum hardness was 116. 3HB and relative wear resistance improved up to 40%.

关 键 词：熔体混合 铝硅合金 初生硅 平均直径 

分 类 号：TG292[金属学及工艺—铸造]