工业纯铜极薄带异步轧制的织构演变

• 作 者: 宋海涛 宋孟 杨德胜 关德满 李婧 刘相华
• 机 构: 辽宁石油化工大学机械工程学院,东北大学轧制技术及连轧自动化国家重点实验室,
• 出 处: 热加工工艺
• 发表日期: 2015年09期
• 关键词: 异步轧制 纯铜 薄带 尺寸效应 剧烈塑性变形 轧材 晶粒尺寸 粉末轧制法 中间退火 增长速率

在轧制过程无退火处理的条件下,通过同步轧制和异步轧制将工业纯铜从5.8 mm轧薄至20μm。采用取向分布函数和取向线分析方法研究了轧材织构的演变规律。结果表明:均匀退火后的原料初始织构主要为旋转立方织构{100}<011>,在剧烈塑性变形过程中,晶粒取向主要在β线上聚集,其形变织构主要由铜型织构{112}<111>和黄铜织构{011}<211>组成。样品在减薄过程中,织构强度不断增加,但在轧制后期织构增长速率并未因塑性变形程度的增加而减缓,反而显著增加。

The industrial pure copper was thinned from 5.8 mm to 20 μm by simultaneous rolling and asynchronous rolling without annealing in the rolling process. Using the orientation distribution function and orientation line analysis method, the evolution law of the texture of the rolling material was studied. The results show that the initial texture of the material after homogeneous annealing is mainly cubic texture {100} <011>. During the severe plastic deformation, the grain orientation mainly concentrates on the β line. The deformation texture is mainly composed of copper Structure {112} <111> and brass texture {011} <211>. During the thinning process, the strength of the texturing increased continuously, but the growth rate of the texturing did not slow down but increased significantly at the later stage of rolling.