不同处理工艺对Cu-Ni-Co-Si合金组织与性能的影响  

Influence of Different Treatment Processes on Microstructure and Properties of Cu-Ni-Co-Si Alloy

作　　者：彭丽军 马吉苗[1] 刘兴宇 刘峰[1] 黄国杰 洪松柏[1] 解浩峰 刘冬梅[2] Peng Lijun;Ma Jimiao;Liu Xingyu;Liu Feng;Huang Guojie;Hong Songbai;Xie Haofeng;Liu Dongmei(Ningbo Xingye Shengtai Group Co., Ltd, Ningbo 315336,China;State Key Laboratory of Nonferrous Metals and Process, General Research Institute for Nonferrous Metals, Beijing 100088,China;State Key Laboratory of Biological Metallurgy, General Research Institute for Nonferrous Metals, Beijing 100088,China)

机构地区：[1]宁波兴业盛泰集团有限公司,浙江宁波315336 [2]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088 [3]北京有色金属研究总院生物冶金国家重点实验室,北京100088

出　　处：《稀有金属材料与工程》2019年第6期1969-1974,共6页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展计划(2016YFB0301300);国家自然科学基金(51601017,51401026)

摘　　要：通过物理性能测试和扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高分辨透射电子显微镜(HRTEM)等分析技术,系统研究不同处理工艺对Cu-Ni-Co-Si合金微观组织与性能的影响。结果表明,合金经热轧在线淬火时效处理后,合金中存在大量的正交结构的大颗粒(Ni,Co)2Si相和少量、细小的(Ni,Co)2Si相,是导致合金综合性能无法满足后续使用的主要原因;经固溶时效和固溶冷变形时效处理后,合金的硬度与时效时间的关系曲线均呈单峰型,而合金的导电率与时效时间的关系曲线均呈先快速增加后缓慢增大最后趋于稳定的趋势;综合性能优良的Cu-Ni-Co-Si合金合理的加工热处理制度为热轧试样经1000℃固溶处理1 h+60%冷变形+500℃时效2 h。合金经固溶时效和固溶冷变形时效处理后,基体中出现大量圆盘状的正交结构的(Ni,Co)2Si相,与基体的取向关系为(221)p//(200)Cu,(102)p//(001)Cu。The influences of different treatment processes on microstructure and properties of Cu-Ni-Co-Si alloy were studied by scanning electron microscopy(SEM),transmission electron microscopy(TEM)and high resolution electron microscopy(HRTEM).The results show that a large number of large-particle(Ni,Co)2Si phases with orthorhombic structure and a few fine(Ni,Co)2Si phases are found in the Cu-Ni-Co-Si alloy after the alloy is quenched on-line and aged,which results in low strength of the alloy.The relation curves between Vickers hardness and aging time exhibit a single peak,while the electrical conductivities firstly increase rapidly,then slowly rise,and finally trend to be stable as the aging time prolongs,when the Cu-Ni-Co-Si alloy is treated by solution+aging treatment and solution+cold deformation+aging treatment separately.The optimal thermomechanical treatment process is solution-treatment at 1000℃ for 1 h+cold rolling by 60%+aging at 500℃ for 2 h.Meanwhile,a lot of disc-shaped(Ni,Co)2Si precipitates with orthorhombic structure are found in the above condition.The orientation relationship of precipitates with Cu matrix is(221)p//(200)Cu,(102)p//(001)Cu.

关 键 词：Cu-Ni-Co-Si合金 固溶时效 微观组织 维氏硬度 导电率 

分 类 号：TG146.1[一般工业技术—材料科学与工程]