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

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第29卷    第2期    总第239期    2019年2月

[PDF全文下载]        

    

文章编号:1004-0609(2019)-02-0286-09
低浓度Cu-Ni-Si合金的组织与性能
刘 峰1, 2,米绪军1,马吉苗2,黄国杰1,洪松柏2,解浩峰1,彭丽军1, 2

(1. 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;
2. 宁波兴业盛泰集团有限公司,宁波 315336
)

摘 要: 采用金相显微镜、透射电子显微镜(TEM)等分析测试手段系统研究不同固溶、冷变形与时效组合工艺对低浓度Cu-Ni-Si合金的晶粒尺寸、析出相粒子尺寸及分布规律,同时对合金的力学与电学性能进行测试。结果表明,相对于其他四种工艺制度,低浓度Cu-Ni-Si合金经过立式在线固溶处理+冷变形+时效组合形变热处理工艺后,合金组织晶粒更加细小(平均晶粒尺寸为25 μm),析出相分布更加弥散,抗拉强度为579 MPa,屈服强度为521 MPa,屈强比为0.9,伸长率为9%,导电率为52.2%IACS;与常用汽车连接器用C70250和TMg0.5合金综合性能进行对比,低浓度Cu-Ni-Si合金具有优良的综合性能,在大功率电流使用时表现出良好的散热性及可靠的尺寸稳定性,可作为高强高导弹性材料广泛应用于汽车连接器等领域。

 

关键字: 低浓度Cu-Ni-Si合金;时效处理;微观组织;屈强比;应力松弛

Microstructure and properties of low concentration of Cu-Ni-Si alloy
LIU Feng1, 2, MI Xun-jun1, MA Ji-miao2, HUANG Guo-jie1, HONG Song-bai2, XIE Hao-feng1, PENG Li-jun1, 2

1. State Key Laboratory of Nonferrous Metals and Process, General Research Institute for Nonferrous Metals, Beijing 100088, China;
2. Ningbo Xingyeshengtai Group Co. Ltd., Ningbo 315336, China

Abstract:The effects of different theromechanical treatments on grain size, precipitate size and distribution of precipitation phase of low concentration of Cu-Ni-Si alloy were investigated by metallurgical microscopy, transmission electron microscopy. The mechanical properties and electrical conductivity of the alloy were also tested. The results show that the Cu-Ni-Si alloy has excellent properties (tensile strength is 579 MPa, yield strength is 521 MPa, yield-tensile ratio is 0.9, elongation is 9% and electrical conductivity is 52.2%IACS ) and the average of grain size is 25 μm,when the alloy is solution treated at vertical bright annealing furnace, cold rolled and aging treatment, which is relative to other four heat treatment processes. Compared with C70250 and TMg0.5 alloys, the low concentration of Cu-Ni-Si alloy has a good heat dissipation and reliable dimensional stability in the use processes of high power current, which can be widely used in the automotive connector field.

 

Key words: low concentration Cu-Ni-Si alloy; ageing treatment; microstructure; yield-tensile ratio; stress relaxation

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

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

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com