重复热处理对ZL105合金组织和性能的影响  

Effect of Multi-heating Treatment on Microstructure and Properties of ZL105 Alloy

作　　者：周中波 王金龙 薛祥义[1,2] 

机构地区：[1]西安西工大超晶科技发展有限责任公司,陕西西安710016 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《铸造技术》2014年第3期506-508,共3页Foundry Technology

摘　　要：以ZL105合金薄壁铸件为研究对象,分析其在多次热处理条件下的微观组织和力学性能。结果表明:ZL105合金的铸态组织主要由粗大的枝晶以及枝晶间共晶相组成。随着热处理次数的增加,枝晶间距逐渐增加,共晶硅逐渐球化并长大,使得ZL105合金的强度和塑性下降。经历3次以上重复热处理后,ZL105合金的力学性能不能满足使用要求。Microstructure and mechanical properties of ZL105 alloy in different states were studied. The results show that as-cast microstructure of ZL 105 alloy is mainly dendritic structure and eutectic phases. Dendrite arm spacing increases with the increase of heat treatment time, and eutectic silicon spheroidizes and growths, which weaken the strength and plasticity of ZL105 alloy. After more than three times of repeat heat treatment, the mechanical properties of ZL 105 cannot meet the requirements.

关 键 词：重复热处理 ZL105合金 力学性能 

分 类 号：TG292[金属学及工艺—铸造]