Effects of rolling and annealing on microstructures and properties of Cu-Mg-Te-Y alloy  

轧制和退火对Cu-Mg-Te-Y合金组织和性能的影响(英文)

作　　者：陈亮[1] 韩建宁[1] 周秉文[1] 薛彦燕 贾非[1] 张兴国[1] 

机构地区：[1]大连理工大学材料科学与工程学院,大连116024

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第4期1046-1052,共7页中国有色金属学报（英文版）

基　　金：Project (50875031) supported by the National Natural Science Foundation of China;Project (DUT122D205) supported by the Fundamental Research Funds for the Central Universities,China

摘　　要：Microstructures and element distributions of the as-cast, hot-rolled and cold-rolled Cu-Mg-Te-Y alloys were studied. Effects of rolling process and annealing temperature on the properties of the Cu-Mg-Te-Y alloys were correspondingly investigated. The results indicate that the Mg element is homogeneously distributed in the matrix and the fragmentized Cu2Te phase is dispersed in the matrix after hot rolling. Then, the Cu2Te phase is further stretched to strip shape after the cold rolling process. The microstructures of the cold-rolled alloy keep unchanged for the sample annealed below 390 ℃ for 1 h. However, after annealing at 550 ℃ for 1 h, the copper alloy with fibrous microstructures formed during the cold rolling process recrystallizes, leading to an obvious drop of hardening effect and an increase of electrical conductivity. The Cu-Mg-Te-Y alloy with better comprehensive properties is obtained by annealing at 360-390 ℃.研究Cu-Mg-Te-Y合金在铸态、热轧态、冷轧态的组织和元素分布；讨论不同退火温度对Cu-Mg-Te-Y合金组织的改变；分析轧制和退火温度对 Cu-Mg-Te-Y 合金性能的影响。结果表明，不同的轧制工艺获得的合金组织与铸态合金组织相比差别明显，轧制后合金中Mg元素分布比铸态合金的更加均匀，Cu-Mg-Te-Y合金热轧后 Cu2Te 相被挤碎，尺寸变小，分布更加弥散，继续冷轧后 Cu2Te 相则被拉长、压扁，呈细条状。冷轧后的Cu-Mg-Te-Y合金在390℃以下退火1 h，组织变化不明显，在550℃退火1 h后，冷变形产生的纤维状组织发生完全回复再结晶，加工硬化效果消失，抗拉强度大幅度下降，导电率上升。退火温度在360~390℃ 范围内， Cu-Mg-Te-Y合金可以获得较好的力学性能。

关 键 词：Cu-Mg-Te-Y alloy microstructures ROLLING ANNEALING mechanical properties electrical conductivity 

分 类 号：TG146.11[一般工业技术—材料科学与工程]