Al-5Ti细化剂和Al-10Sr变质剂对A357合金微观组织和力学性能的影响  

Effect of Al-5Ti Refiner and Al-10Sr Modifier on Microstructure and Mechanical Properties of A357 Alloy

作　　者：陈忠伟[1] 何志[1] 介万奇[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《铸造》2005年第2期129-133,共5页Foundry

基　　金：国家重点基础研究发展规划项目(G2000067202 1);国防先进工业技术项目(Z1400A006)。

摘　　要：研究了Al 5Ti细化剂和Al 10Sr变质剂对A357合金金属型铸造时微观组织和力学性能的影响。结果表明,单独细化晶粒的最佳Ti加入量为0 08%～0 14%,单独变质处理的最佳Sr加入量为0 005%～0 01%。当以单独细化晶粒的最佳Ti量和单独变质处理的最佳Sr量共同加入合金时,合金的力学性能却有所下降。适当增大Sr加入量可克服上述不利影响,并获得更好的效果。Effects of Al-5Ti refiner and Al-10Sr modifier on the microstructure and the mechanical properties of A357 alloy during die-casting were experimentally studied. The results showed that the optimal Ti addition was 0.08% - 0.14% when the alloy was refined through the addition of Al-5Ti refiner alone, and the optimal Sr addition was 0.005% - 0.01% when modified through the addition of Al-10Sr modifier. However, the mechanical properties were reduced when the optimal contents of Ti and Sr additions were combined in the melt. The negative influence can be overcome and the best treatment result can be obtained by increasing Sr addition.

关 键 词：A357合金 Al-5Ti细化剂 Al-10Sr变质剂 微观组织 力学性能 

分 类 号：TG27[金属学及工艺—铸造]