变薄拉深对430不锈钢表面起皱的影响  

Effect of thinning drawing on surface ridging of 430 stainless steel

作　　者：南海[1] 端木樊杰 李静媛[2] 陈雨来[2] NAN Hai;DUANMU Fan-jie;LI Jing-yuan;CHEN Yu-lai(State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron and Steel (Group)Co.,Ltd.,Taiyuan 030003,Shanxi,China;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,山西太原030003 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《钢铁》2019年第1期56-62,共7页Iron and Steel

基　　金：国家重点研发计划资助项目(2016YFB0300204);国家自然科学基金资助项目(U1660114)

摘　　要：为了研究变薄拉深对430不锈钢表面起皱的影响,采用DEFORM-2D分析0.56、0.79和1.00 mm 430不锈钢冷轧退火板的拉深-变薄过程,最大变薄率分别为32.14%、26.58%和26.00%,并对0.79 mm厚的板材进行试验验证,测得最大变薄率约为30.38%,与模拟结果接近;通过表面粗糙度数据,可知变薄率越大,改善起皱效果越明显,最优变薄率约为20%,但变薄率太大时,拉深件表面出现明显摩擦划痕;通过EBSD测量,变薄拉深并未改变与起皱相关的{111}〈112〉与{111}〈110〉织构的晶粒体积分数,初步判定通过物理挤压作用可以改善起皱。In order to study the effect of the thinning drawing on the 430 stainless steel surface ridging,the drawing-thinning drawing process of the 430 stainless steel cold rolling annealing plate was analyzed by DEFORM-2D,and largest thinning rates of those plates with 0.56,0.79 and 1.00 mm were 32.14%,26.58% and 26.00% respectively. The experiment on the 0.79 mm plate showed that the real largest thinning rate was 30.38% which was close to the simulation result. Based on the testing value of the surface roughness we concluded that during a proper thinning rate range,a larger thinning rate could reduce the surface ridging more obviously,and the best thinning rate of reducing surface ridging was about 20%. However,when the thinning rate was too large,the friction scratch appeared. According to the result of EBSD,the thinning drawing didn’t change the crystalline grain volme fraction of {111}〈112〉and {111}〈110〉texture,which could be explained that the surface ridging can reduce the surface ridging because of the physical squeeze.

关 键 词：430铁素体不锈钢 表面起皱 DEFORM-2D 变薄拉深 变薄率 表面粗糙度 

分 类 号：TG386.32[金属学及工艺—金属压力加工]