形变热处理对Cu-Ni-Si合金组织性能的影响  

Effect of thermomechanical treatment on microstructure and properties of Cu-Ni-Si alloy

作　　者：单运启 张彦敏[1,2] 张朝民 刘爱奎 冯江[1,2] 赵世恒 皇保欢 宋克兴[1,2,3,4] 周延军 SHAN Yun-qi;ZHANG Yan-min;ZHANG Chao-min;LIU Ai-kui;FENG Jiang;ZHAO Shi-heng;HUANG Bao-huan;SONG Ke-xing;ZHOU Yan-jun(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan Key Laboratory of Nonferrous Metal Materials Science and Processing Technology,Luoyang 471023,China;Henan Academy of Sciences,Zhengzhou 450046,China;Henan Key Laboratory of Advanced Conductor Materials,Zhengzhou 450046,China;Kaimeilong Precision Copper Strip(Henan)Co Ltd,Xinxiang 453700,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023 [3]河南省科学院,河南郑州450046 [4]河南省先进导体材料重点实验室,河南郑州450046 [5]凯美龙精密铜板带(河南)有限公司,河南新乡453700

出　　处：《材料热处理学报》2024年第1期95-102,共8页Transactions of Materials and Heat Treatment

基　　金：河南省重大科技专项(221100210300)。

摘　　要：借助扫描电镜、电子万能试验机、维氏硬度计和数字涡流金属电导仪等研究了冷轧变形量和时效对Cu-Ni-Si合金组织与性能的影响。结果表明:冷轧态合金变形量越大,显微组织中晶粒沿着轧制的方向被拉得越长和越扁。当时效温度或时效时间增加到一定程度时,冷变形晶粒发生了回复再结晶,时效时间继续延长再结晶晶粒逐渐长大。冷轧态合金主要以脆性断裂为主,时效态合金以韧性断裂为主。当冷轧变形量为80.0%及经500℃×1 h时效后合金的综合性能最佳,电导率为46.37%IACS,显微硬度为236.14 HV0.1,抗拉强度为638.24 MPa,屈服强度为581.55 MPa,伸长率为5.77%。Effect of cold rolling deformation and aging on microstructure and properties of Cu-Ni-Si alloy was studied by means of scanning electron microscopy,electronic universal testing machine,Vickers hardness tester and digital eddy current metal conductivity tester.The results show that the larger the deformation of the cold-rolled alloy,the longer and flatter the grains in the microstructure are pulled along the rolling direction.When the aging temperature or aging time increases to a certain extent,the cold deformed grains undergo recovery and recrystallization,and the recrystallized grains gradually grow as the aging time continues to increase.The fracture mode of the cold-rolled alloy is dominant by brittle fracture,while the aged alloy is dominant by ductile fracture.When the cold rolling deformation is 80.0%and then after aging at 500℃for 1 h,the comprehensive performance of the alloy is the best,with the electrical conductivity of 46.37%IACS,the microhardness of 236.14 HV0.1,the tensile strength of 638.24 MPa,the yield strength of 581.55 MPa,and the elongation of 5.77%.

关 键 词：CU-NI-SI合金 形变热处理 显微组织 力学性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程]