高铝锌合金低温冲击韧性研究  

Study on low-temperature impact toughness of high-contented Al-Zn alloy

作　　者：刘赛[1] 杨涤心[1,2] 高耀进[1] 张金雨[1] 法瑞[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]河南省有色金属材料科学与加工技术重点实验室

出　　处：《矿山机械》2011年第7期124-127,共4页Mining & Processing Equipment

基　　金：河南省国际合作项目(084300510006);河南科技大学博士科研基金(2008BS025)

摘　　要：高铝锌合金以其优良的机械性能、高耐磨性和高强度得到了广泛地应用,由于该合金的塑性及韧性值较低,因而应用受到了一定限制。笔者研究了高铝锌合金在铸态、均匀化处理以及时效处理后的低温冲击韧性变化规律。试验结果表明,锌铝合金的冲击韧性随着温度的降低而急剧降低,冲击后试样弯曲程度也随着温度的降低而减小;锌铝合金经过360℃均匀化处理后,试样的低温冲击韧性升高,塑性-脆性转变曲线上移;锌铝合金经过250℃时效处理后,冲击韧性比铸态的低,并且塑性-韧性转变曲线下移。High contented Al-Zn alloy is widely applied due to its excellent mechanical properties,wear resistance and strength,and limited due to its plasticity and toughness.In the paper,the variation law of the low-temperature impact toughness of the high-contented Al-Zn alloy after casting,homogenization treatment and aging treatment is studied.The results show that the impact toughness of the Al-Zn alloy decreases sharply with the decrease in temperature.Impact bending degree of the test sample decreases with the decrease in temperature.After 360 ℃ homogenization treatment,the low-temperature impact toughness of the test sample increases,and the plasticity-brittleness transition curve moves up.After 250 ℃ aging treatment,the impact toughness of the alloy is low than that of casting,and plasticity-toughness transition curve moves down.

关 键 词：高铝锌合金 冲击韧性 均匀化处理 时效处理 

分 类 号：TG115.5[金属学及工艺—物理冶金]