压延铜箔轧制压下率与组织织构和耐弯折性能的关系<sup>*</sup>

doi:10.11901/1005.3093.2013.956

材料研究学报

2014, Vol. 28

Issue (4): 241-247 DOI: 10.11901/1005.3093.2013.956

本期目录 | 过刊浏览

压延铜箔轧制压下率与组织织构和耐弯折性能的关系^*

刘雪峰^1,³(

),李晶琨¹,汪汐涌¹,谢建新^2,³

1. 北京科技大学材料科学与工程学院北京 100083
2. 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
3. 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

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

Xuefeng LIU^1,^3,^**(

),Jingkun LI¹,Xiyong WANG¹,Jianxin XIE^2,³

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083
2. Key Laboratory for Advanced Materials Processing (MOE), University of Science and Technology Beijing, Beijing 100083
3. Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing 100083

引用本文:

刘雪峰,李晶琨,汪汐涌,谢建新. 压延铜箔轧制压下率与组织织构和耐弯折性能的关系^*[J]. 材料研究学报, 2014, 28(4): 241-247.
Xuefeng LIU, Jingkun LI, Xiyong WANG, Jianxin XIE. Relations of Rolling Reduction and Microstructure, Texture and Bending Property of Rolled Copper Foils[J]. Chinese Journal of Materials Research, 2014, 28(4): 241-247.

全文: PDF(6841 KB) HTML

摘要:

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。

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

Abstract：

Annealed pure copper strips were taken as raw materials, and after the processes of foil rolling, the rolled copper foils were fabricated. The effect of foil rolling reduction on microstructure, texture and bending property of the rolled copper foils was studied. The results show that the cross-sectional microstructure of the rolled copper foil consists of elongated grains and the adjacent grain boundaries spacing gradually decreases with the increase of the rolling reduction. When the reduction reaches 90.7%, the adjacent grain boundaries spacing is only 0.52 μm. Rolling textures of the rolled copper foils mainly consist of C, S and B orientation components. With the increase of reduction, the whole intensity of rolling texture increased, and the orientation concentrated continuously. The rolled copper foil with reduction of 90.7% has the best bending resistance, whose fatigue life is more than 300 times. The basic reason for the enhancement in bending performance of copper foils may be that a great foil rolling reduction makes their grains much thinner and their texture highly intensified.

Key words： metallic materials rolled copper foil rolling reduction microstructure and texture bending property mechanism

收稿日期: 2013-12-18

基金资助:* 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。

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https://www.cjmr.org/CN/10.11901/1005.3093.2013.956 或 https://www.cjmr.org/CN/Y2014/V28/I4/241

图1 耐弯折性能测试示意图

图2 退火态轧制铜带及不同压下率轧态铜箔的纵截面微观组织

图3 退火态轧制铜带及不同压下率铜箔位错组态及密度

图4 退火态轧制铜带及不同压下率铜箔的ODF图

图5 铜箔轧制织构取向线分析

表1 轧态铜箔断裂前弯折次数

图6 不同厚度轧态铜箔弯曲表面裂纹形貌

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