淬火温度对QAl10-5-5铜铝合金组织性能的影响  

Effect of Quenching Temperature on Microstructure and Properties of QAl10-5-5 Cu-Al Alloy

作　　者：朱佳博 南黄河[1] 何冰[1] ZHU Jiabo;NAN Huanghe;HE Bing(Shanxi Railway Institute,Techanical and Electrical Engineering Department,Weinan 714000,China)

机构地区：[1]陕西铁路工程职业技术学院机电工程系

出　　处：《沈阳理工大学学报》2019年第5期28-31,共4页Journal of Shenyang Ligong University

基　　金：陕西铁路工程职业技术学院校级自然科学基金资助项目(KY2018-68)

摘　　要：以主要元素为Cu80-Al9.8的合金为研究对象,经淬火处理后发现,随着淬火温度的升高,合金中白色的α相组织和黑色颗粒状的k相组织逐渐减少,黑色β相组织逐渐增多;淬火温度升至950℃时,合金中的k相组织已基本消失,合金中有较多的β相组织,α相在β相界面及晶体内析出,且逐渐减少。经常温(10~25℃)拉伸后发现,合金的抗拉强度、屈服强度、延伸率均呈现先升后降的趋势。淬火温度在900℃时,合金的抗拉强度、屈服强度分别为743MPa和410MPa。950℃淬火时,合金的抗拉强度、屈服强度迅速下降至600MPa、340MPa,可见温度为900℃时兼顾了合金的强度和塑性,为适宜的热处理工艺。Taking 80% Cu-9.8% Al as the research object,it was found that with the increase of quenching temperature,the white phase structure and the black granular k phase in the alloy decreased gradually,and the blackβand phase structure increased gradually.When quenched to 950℃,the k phase in the alloy has basically disappeared,and there are moreβ,phase structure,phase precipitate in β,interface and crystal,and decrease gradually in the alloy.It is found that the tensile strength,yield strength and elongation of the alloy show the trend of rising first and then decreasing.When the temperature is 900℃,both the strength and the shape of the alloy are taken into account,which is the suitable heat treatment process.

关 键 词：铜铝合金 淬火 相变 力学性能 

分 类 号：TG146[一般工业技术—材料科学与工程]