Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第17卷    第7期    总第100期    2007年7月

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文章编号:1004-0609(2007)07-1112-07
时效态Cu-Cr-Zr-Mg-RE合金的组织与性能
慕思国1, 2,曹兴民2,汤玉琼2,向朝建2,杨春秀2,
郭富安2,唐谟堂1

(1. 中南大学 冶金科学与工程学院,长沙 410083;
2. 苏州有色金属加工研究院,苏州 215026
)

摘 要:

采用高分辨电子显微镜(HRTEM)和光学显微镜(OM)研究Cu-0.43%Cr-0.17%Zr-0.05%Mg-0.05%RE(质量分数)合金的微观组织,测试不同时效工艺下合金的抗拉强度和电导率等性能。结果表明:合金经过冷轧后,在     450 ℃时效4 h,析出相细小且弥散分布在基体中,合金具有较好的综合性能。HRTEM和能谱分析表明,铬相在合金中有棒状、六边形和球状3种存在形态;锆主要以富锆相存在于合金基体中;合金在400 ℃时效时,观察到了亚稳相CrCu2(Zr, Mg)及其分解过程。

 

关键字: Cu-Cr-Zr-Mg-RE合金;微观组织;电导率;抗拉强度

Microstructure and properties of aging Cu-Cr-Zr-Mg-RE alloy
MU Si-guo1, 2, CAO Xing-min1, TANG Yu-qiong1, XIANG Chao-jian2,
YANG Chun-xiu2, GUO Fu-an1,TANG Mo-tang2

1. School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China;
2. Suzhou Institute for Nonferrous Metals Processing Technology, Suzhou 215026, China

Abstract:The microstructure of Cu-0.43%Cr-0.17%Zr-0.05%Mg-0.05%RE (mass fraction) alloy was studied by high resolution transmission electron microscopy and optical microscopy. The electrical conductivity, tensile strength and micro-hardness of this alloy after cold rolling and aging treatment were investigated. The results show that the alloy aged at 450 ℃ for 4 h has good combination of physical and mechanical properties. The analyses of HRTEM show that three kinds of chromium-rich phase, such as club-shaped, hexagonal shape and spherical shape exist in the alloy. The zirconium-rich phase and decomposing CrCu2(Zr, Mg) phase are observed at aging temperature of 400 ℃.

 

Key words: Cu-Cr-Zr-Mg-RE alloy; microstructure; electrical conductivity; tensile strength

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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