热处理对Cu-0.36wt%Cr合金组织和性能的影响  

The effects of heat treatments on structure and properties of Cu-0.36wt%Cr alloy

作　　者：徐长征[1] 王庆娟[1] 郑茂盛[1] 周根树[1] 仝明信[1] 黄美权[1] 张雅妮[1] 

机构地区：[1]西安交通大学材料科学与工程学院,陕西西安710049

出　　处：《功能材料》2006年第12期1898-1901,共4页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2002AA331110);中捷国家合作资助项目(2004-37-17);中保国家合作资助项目(2004-10-03A);西安交通大学博士论文基金资助项目(DFXJTU2003-4)

摘　　要：利用扫描电子显微镜、能谱分析、透射电子显微镜、光学显微镜等手段研究了热处理对Cu-0.36％（质量分数）Cr舍金组织和性能的影响。分析讨论了舍金性能的影响因素及强化机理。结果表明，均匀化处理可以很大程度的消除微观偏析；经（990±5）℃×1h固溶、470℃×（3～4）h时效处理后可获得较好的综合性能，强度、硬度和电导率分别为494MPa、121.5HV和80．5％IACS；时效前预冷变形可以提高时效强化的效果，时效前经38%冷加工变形后进行470℃×2h时效处理，强度、硬度和电导率可分别提高到537MPa、146．7HV和85％IACS，远远优于国内外同类材料。The effects of heat treatments on structure and properties in Cu-0. 36wt%Cr alloy were studied by using SEM,EDXA, TEM and optical microscopy technique; the strengthening mechanism and influencing factors on properties of alloy were analyzed. The results show that： microsegregation can be eliminated by the homogenizing treatment; The alloy takes on good comprehensive properties by solid solution treatment at （990 ± 5）℃ for 1h and aging at 470℃ for 3-4h subsequently,the tensile strength,hardness and electric conductivity of the alloy is 494MPa, 121.5HV and 80. 5%IACS respectively; strengthening effect can be enhanced by cold working before aging treatment,the tensile strength, hardness and electric conductivity of the alloy can be increased to 537MPa,146.7HV and 85%IACS respectively by 38% cold deformation before aging at 470℃ for 2h,the comprehensive properties are superior to domestic and oversea materials in the same category.

关 键 词：Cu—Cr合金 均匀化 时效 冷变形 

分 类 号：TG146.1[一般工业技术—材料科学与工程] TG166.2[金属学及工艺—金属材料]