摘要
以蚀刻引线框架用C19400合金带材为研究对象,测试了热轧态、冷轧态和退火态的C19400合金带材的力学性能和导电性能。采用扫描电镜、透射电镜和电子背散射衍射技术,分析了不同处理状态下合金的断口形貌、析出相、晶粒和织构演变。结果表明,热轧态合金经过冷轧大变形后,抗拉强度由293 MPa提高到516 MPa,电导率由16.82 MS/m降低到14.88 MS/m;经过退火处理后,抗拉强度降低到344 MPa,电导率升高到34.83 MS/m。微观组织分析表明,3种状态下合金析出相都是纳米α-Fe单质;冷轧态的晶粒尺寸最小,绝大多数为变形晶粒,热轧态和退火态主要是再结晶晶粒和亚晶;热轧态整体织构强度较弱,冷轧后旋转立方织构{001}<110>消失,铜型织构{112}<111>、立方织构{001}<100>和黄铜型织构{011}<211>强度增强且体积分数增大,经过退火后铜型、立方和黄铜型织构强度减弱且体积分数减小。
The mechanical and electrical properties of C19400 alloy strip for etching lead frames in hot-rolled state,cold-rolled state and annealed state were measured.The fracture morphology,evolution of grain,precipitate and texture of C19400 alloy strip under different treatment conditions were investigated by optical microscope,scanning electron microscopy and transmission electron microscopy.The results show that after cold-rolling,the tensile strength of hot-rolled alloy is increased from 293 MPa to 516 MPa,and the conductivity is decreased from 16.82 MS/m to 14.88 MS/m.After annealing,the tensile strength is decreased to 344 MPa and the conductivity is increased to 34.83 MS/m.The microstructure observation shows that the precipitates of the alloy in different states are allα-Fe phase.The grain size in ones at the cold-rolled state is the smallest,and most of them present deformed grains.The hot-rolled and annealed state ones are mainly recrystallized grains and sub-grains.Hot-rolled texture strength is weak.After cold rolling,the rotating cubic texture{001}<110>disappears,and the strength of the copper texture{112}<111>,cubic texture{001}<100>and brass texture{011}<211>is enhanced and volume fraction is increased.After annealing,the texture strength and volume fraction of copper,cubic and brass types are decreased.
作者
宋宇
杨婧钊
周延军
宋克兴
皇涛
彭晓文
郭慧稳
刘爱奎
Song Yu;Yang Jingzhao;Zhou Yanjun;Song Kexing;Huang Tao;Peng Xiaowen;Guo Huiwen;Liu Aikui(School of Mechanical and Electrical Engineering,Luoyang Polytechnic;School of Mechanical and Electrical Engineering,Northwestern Polytechnical University;School of Materials Science and Engineering,Henan University of Science and Technology;Collabororative Innovation Center of Nonferrous Metals Henan Province;Chinalco Luoyang Copper Processing Co.,Ltd.;KME Precision Copper Strip Co.,Ltd.)
出处
《特种铸造及有色合金》
CAS
北大核心
2022年第9期1175-1181,共7页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(52173297)
河南省创新引领专项资助项目(191110210400)
河南省自然科学基金资助项目(202300410139)
中国工程科技发展战略河南研究院战略咨询研究资助项目(2021HENZDA02)
作者简介
第一作者:宋宇,男,1989年出生,助教,河南洛阳(471032),E-mail:songyu829@163.com
