压延铜箔轧制压下率与组织织构和耐弯折性能的关系

材料研究学报, 2014, 28(4): 241-247.

压延铜箔轧制压下率与组织织构和耐弯折性能的关系

1.北京科技大学材料科学与工程学院北京 100083;北京科技大学现代交通金属材料与加工技术北京实验室北京 100083

2.北京科技大学材料科学与工程学院北京 100083

3.北京科技大学材料科学与工程学院北京 100083

4.北京科技大学材料先进制备技术教育部重点实验室北京 100083;北京科技大学现代交通金属材料与加工技术北京实验室北京 100083

基金项目: 国家科技支撑计划2011BAE23B02和中央高校基本科研业务费FRF-TP-10-002B资助项目 National Key Technology Research and Development Program of the Ministry of Science and Technology of China No.2011BAE23B02,and the Fundamental Research Funds for the Central Universities of China No.FRF-TP-10-002B

关键词：金属材料 , 压延铜箔 , 轧制压下率 , 组织织构 , 耐弯折性能 , 机理

Relations of Rolling Reduction and Microstructure, Texture and Bending Property of Rolled Copper Foils

Keywords： metallic materials , rolled copper foil , rolling reduction , microstructure and texture , bending property , mechanism

采用退火态轧制铜带为原料,进行不同压下率的箔轧,研究箔轧压下率与铜箔组织织构及耐弯折性能的关系,并探讨其机理.结果表明,铜箔微观组织由沿轧制方向被拉长的扁平状晶粒组成,相邻晶界间距平均值随着箔轧压下率增大而显著减小;当箔轧压下率为90.7％时,铜箔相邻晶界间距平均值仅为0.52 μm.铜箔轧制织构以铜型、S型和黄铜型织构为主.随着压下率的增大,轧制织构整体强度增大,取向不断集中.当箔轧压下率为90.7％时,铜箔的耐弯折性能最好,疲劳寿命可超过300次.大的箔轧压下率使得铜箔的晶粒尺寸更薄及取向更集中是铜箔耐弯折性能提高的根本原因.

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