摘要
研究了熔铸、热加工及热处理条件对Cu-Cr-Zr合金组织和性能的影响。结果表明,铸态Cu-Cr-Zr合金存在微观偏析,Cr元素主要分布在晶界,组织分布不均匀,性能较差;经过热锻、热挤变形后,改善了合金元素的分布,减小了晶粒尺寸,合金性能提高;在热处理过程中,热变形组织加速了合金元素扩散、析出过程,使析出硬化程度大幅度提高,热挤态的Cu-Cr-Zr合金固溶时效后获得较好的强度431.7 MPa、延伸率28.1%和导电率80%IACS。
The effect of melting casting, hot working and heat treatment on microstructure and properties of Cu-Cr-Zr alloy is studied. The results show that the as-cast microstructure of Cu-Cr-Zr alloy is uneven and micro-segregation, the elements of Cr is mainly distributed in the grain boundary and the property is lower. The second phase of Cu-Cr-Zr alloy is uniform and cause performance improvements by hot forging and hot extrusion deformation. Hot deformation promotes precipitation of Cr and Zr alloying elements during solid solution aging, which improves the ability of precipitatiou-hardened significantly. The Cu-Cr-Zr alloy by hot extrusion deformation acquires combination properties of high strength and high conductivity after solution treated and aging treatment. Good balance of strength, elongation and conductivity, whieh reach to 431.7 MPa, 28. 1% and 80% IACS respectively.
出处
《有色金属工程》
CAS
CSCD
北大核心
2018年第1期6-10,共5页
Nonferrous Metals Engineering
基金
国家自然科学基金项目(51104113)
西安市科技计划项目(JZKD002)
关键词
CU-CR-ZR合金
热变形
固溶时效
强度
导电率
Cu-Cr-Zr alloys
hot deformation
solid solution aging
strength
electrical conductivily
