模腔通道长度对铜材连续挤压产品组织性能的影响  

Effects of die-chamber channel length on the microstructure and mechanical properties of copper strip during continuous extrusion

作　　者：董少峥[1] 陈莉[1] 李冰[1] 宋宝韫[1] 

机构地区：[1]大连交通大学连续挤压教育部工程研究中心,大连116028

出　　处：《塑性工程学报》2013年第3期26-30,共5页Journal of Plasticity Engineering

基　　金：国家"十二五"科技支撑计划资助项目(2011BAE23B01);辽宁省教育厅科学研究资助项目(L2012154);国家自然科学基金资助项目(51205036)

摘　　要：采用有限元数值模拟,分析铜扁线连续挤压成形中不同模腔通道长度下温度场分布规律;通过对工程试验的样品进行分析,得到了不同模腔通道长度下产品的微观组织和力学性能。结果表明,随着模腔通道长度的增加,腔体内坯料的温度逐渐升高,晶体的回复再结晶程度逐渐增大,晶粒随之长大;抗拉强度和硬度均随模腔通道长度的增加而降低;延伸率虽然也有所降低,但降低程度有限。In this paper the temperature distribution of copper continuous extrusion forming under different die-chamber channel length was analyzed by finite element method. The effects of die-chamber channel length on microscopic structure and subsequent mechanical properties of copper strip during continuous extrusion are investigated by analysis of the engineering test samples. The results indicate that with the die-chamber channel length increases, the temperature in the chamber, the percentage of crystal re- crystallization and grain size tend to increase. Furthermore the tensile strength and hardness go down obviously with increasing die-chamber channel length. Elongation also decreases with an increase in die-chamber channel length, but the level is limited.

关 键 词：铜扁线 连续挤压 模腔通道长度 回复 再结晶 数值模拟 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TG379[金属学及工艺—金属材料]