摘要
铜-铝复合带是将铜带复合在铝带上随后冷轧而成,但冷轧过程中复合带会发生翘曲。借助于MSC.MARC有限元软件建立了冷轧铜-铝复合带的二维模型,研究了道次压下率、铜带与铝带的厚度比和轧制速率对冷轧铜-铝复合带翘曲程度的影响。采用二辊冷轧机进行了铜-铝复合带的冷轧试验,并与有限元模拟结果进行了对比。结果表明:采用厚度比为1∶4的铜带和铝带,以175 mm/s的速率冷轧的铜-铝复合带,随着道次压下率从55%增大至70%,其曲率先减小后增大,以57.5%的道次压下率冷轧的复合带平直度最好。以60%的道次压下率和175 mm/s的速率冷轧的复合带,其曲率随着铜带与铝带厚度比的增加而减小。采用厚度比为1∶6的铜带和铝带,以70%的道次压下率和125~225 mm/s的速率冷轧的复合带,其曲率先减小后增大,以180 mm/s的速率冷轧的复合带平直度最好。
Copper-aluminum composite strip was fabricated by covering an aluminum strip with a cooper strip followed by cold-cooling,but would warp during cold-rolling.A two-dimensional model for cold-rolling copper-aluminum composite strip was established with the help of MSC.MARC finite element software,and the effect of reduction in pass,copper strip to aluminum strip thickness ratio,and rolling rate on the warping degree of the copper-aluminum composite strip was investigated,as well as the test for cold-rolling copper-aluminum composite strip was carried out by using a two-roll cold rolling mill,to verify the simulated results.The results showed that(a)the composite strip fabricated by cold-rolling the billet,whose copper strip to aluminum stripe thickness ratio was 1-to-4,at rolling rate of 175 mm/s exhibited curvature which decreased at first and then increased with the increase from 55%to 70%in reduction in pass,and the composite strip cold-rolled at reduction in pass of 57.5%was the straightest;(b)the composite strip cold-rolled at both reduction in pass of 60%and rolling rate of 175 mm/s developed curvature which decreased with the increase in copper strip to aluminum stripe thickness ratio;and(c)the composite strip fabricated by cold-rolling the billet,whose copper strip to aluminum stripe thickness ratio was 1-to-6,at both reduction in pass of 70%and rolling rates of 125 to 225 mm/s exhibited curvature which decreased at first and then increased,and the composite strip cold-rolled at rolling rate of 180 mm/s had the best flatness.
作者
李晓青
魏立群
付斌
徐星星
LI Xiaoqing;WEI Liqun;FU Bin;XU Xingxing(School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China)
出处
《上海金属》
CAS
2021年第5期85-90,101,共7页
Shanghai Metals
基金
上海市冶金工艺和设备检测专业技术服务平台(No.11DZ2291200)。
关键词
冷轧
铜-铝复合带
有限元软件
翘曲
cold-rolling
copper-aluminum composite strip
finite element software
warpage
