固溶温度和时间对ZL114A合金组织的影响  

Influence of Solution Temperature and Time on Microstructure of ZL114A Alloy

作　　者：李卫超[1] 邹勇志[1,2] 曾建民[1,2] 

机构地区：[1]广西大学有色金属及材料加工新技术教育部重点实验室,广西南宁530004 [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：《机械工程材料》2008年第11期25-27,共3页Materials For Mechanical Engineering

基　　金：广西科技开发计划资助项目(桂科能04430011-1)

摘　　要：通过金相分析、动力学分析等方法,研究了固溶温度和固溶时间对ZL114A合金共晶硅形态的影响。结果表明:固溶温度对共晶硅的粒化过程有很大的影响,在不产生过烧时,温度越高共晶硅的粒化速率越快、粒化程度越彻底;固溶时共晶分枝和凹槽处首先熔断,并且端部钝化逐渐圆整;ZL114A合金在550℃×10 h固溶时的硅相形态最为理想。Metallographic analysis and diffusion kinetics analysis were used to investigate the contribution of solution temperature and time to eutectic Si morphology of ZL114A alloy in the solution treatment process. The results indicate that the solution temperature is a significant influence factor on the process of eutectic Si spheroidization. Spheroidization degree of eutectie Si increases with the increase of solution temperature. As long as the temperature is below the overheat temperature, the divarication and neck section of eutectic Si break up firstly during solution treatment, and the Si phase is gradually passivated and rounded. The optimal Si morphology of ZL114A alloy was obtained after 550℃×10 h solution treatment.

关 键 词：ZL114A铝合金 固溶处理 组织 

分 类 号：TG146[一般工业技术—材料科学与工程]