K2ZrF6变质剂对ZL114A合金组织和拉伸性能的影响  

Effects of K2ZrF6 Modifier on Microstructure and Tensile Properties of ZL114A Alloy

作　　者：胥晓强 范建业 董立新[1] 刘力菱[1] 吴成辉 XU Xiaoqiang;FAN Jianye;DONG Lixin;LIU Liling;WU Chenghui(School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;Chengdu Fujiang Machinery Manufacturing Co., Ltd., Chengdu 611130, China)

机构地区：[1]西南交通大学材料科学与工程学院,四川成都610031 [2]成都富江机械制造有限公司,四川成都611130

出　　处：《热加工工艺》2018年第11期38-41,共4页Hot Working Technology

摘　　要：使用K2ZrF6作为变质剂在722℃对ZL114A合金进行变质处理,研究了K2ZrF6加入量对铸态及T6热处理态下ZL114A合金的组织和拉伸性能的影响。结果表明：K2ZrF6变质剂加入量为1.00wt%~1.10 wt%时,ZL114A合金的变质效果最佳。在该条件下,组织中α-Al相大致呈等轴状,共晶硅相大多为纤维状或短棒状,α-Al和共晶硅间的界面圆化;铸态和T6热处理态下ZL114A合金均具有最好的综合拉伸性能。The ZL114 A alloy was modified at 722 ℃ with K2ZrF6 as the modifier, and the effects of the K2ZrF6 addition on the microstructure and tensile properties of as-cast and T6 heat treated ZL114 A alloys were studied. The results show that the ZL114 A alloy can achieve the best modification effect with K2ZrF6 addition of 1.00 wt%-1.10 wt %. Under the conditions,α-Al phase in the microstructure is roughly equiaxed, the eutectic silicon phase is mostly fibrous or short rod and the grain boundary between α-Al phase and eutectic silicon phase is rounded. The as-cast and T6 heat treated ZL114 A alloys have the best comprehensive tensile properties.

关 键 词：ZL114A合金 K2ZrF6变质剂 微观组织 拉伸性能 

分 类 号：TG292[金属学及工艺—铸造]