浇注温度和冷却速度对ZL114A合金变质处理效果的影响  

Influence of Pouring Temperature and Cooling Rate on Modification of ZL114A Alloy

作　　者：胥晓强 董立新[1] 刘力菱[1] 吴成辉 魏善涛 

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611131

出　　处：《铸造技术》2018年第2期333-336,341,共5页Foundry Technology

摘　　要：采用氟锆酸钾作为变质剂对ZL114A合金进行变质处理,研究了不同浇注温度和冷却速度对ZL114A合金的铸态及T6热处理态时的显微组织和拉伸性能的影响。结果表明,浇注温度为710~720℃,采用金属型冷却时,ZL114A合金具有最佳的变质效果,其显微组织中α-Al基体大致呈等轴状,且具有较大的晶粒度,共晶硅大多为细纤维状或短棒状。The K2ZrF6 was used as modifiers for the modification of ZLll4A alloy, the microstructure and tensile properties of as-cast and T6 ZLll4A alloy with different pouring temperature and cooling rate were investigated. The results show that modification of ZLll4A alloy is the best at 710-720 ℃pouring and with metal mold, -Al matrix is mainly a larger isometric grains, most of the eutectic silicon is fine fibrous or short rod.

关 键 词：ZL114A铝合金 氟锆酸钾变质处理 微观组织 拉伸性能 

分 类 号：TG292[金属学及工艺—铸造]