稀土对压铸锌合金ZnAl4组织和性能的影响  

Effects of RE on Microstructure and Mechanical Properties of ZnAl4 Alloy

作　　者：耿家锐[1] 薛涛[1] 聂登攀[1] 吴素彬[1] 吴健[1] 

机构地区：[1]贵州省冶金化工研究所

出　　处：《特种铸造及有色合金》2011年第8期721-724,共4页Special Casting & Nonferrous Alloys

摘　　要：采用Ce基混合稀土对ZnAl4合金进行了变质处理,研究了稀土对ZnAl4合金力学性能的影响规律。结果表明,加入0.5%的稀土能够细化ZnAl4合金的压铸态组织,合金共晶组织区域增加,稀土含量超过0.5%时,合金的综合力学性能下降。用0.5%稀土变质后的合金生产化油器,合金的压铸性能得到改善,零件的气密性得到大幅提高。Effects of Ce on microstructure and mechanical properties of ZnAl4 alloy modified by Ce were investigated.The results show that with 0.5% Ce addition,microstructure of die casting ZnAl4 alloy is refined,where eutectic zone is increased.However,with Ce content more than 0.5%,comprehensive properties of the alloy are deteriorated as a result of the creation of Al4C3 phase.The alloy with 0.5% Ce modification was employed to produce carburetor.The production verified that the die casting behavior of the modified alloy is obviously improved,and air-tightness of the carburetor is greatly improved.

关 键 词：ZnAl4合金 稀土 变质处理 力学性能 

分 类 号：TG27[金属学及工艺—铸造]