C19400铜合金带材折弯性能分析  

Analysis of Bending Performance of C19400 Copper Alloy Strip

作　　者：高红姣 张彦敏[1,2] 周菲 周延军[1,2] 苏娟华[1,2] 胡铜生 洪小兵 刘爱奎 GAO Hongjiao;ZHANG Yanmin;ZHOU Fei;ZHOU Yanjun;SU Juanhua;HU Tongsheng;HONG Xiaobing;LIU Aikui(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Collaborative Innovation Center of Nonferrous Metals,Henan University of Science and Technology,Luoyang 471023,China;Tongling Jinwei Copper Co.,Ltd.,Tongling 244000,China;Kaimeilong precision copper strip(Henan)Co.,Ltd.,Xinxiang 453000,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南科技大学有色金属共性技术河南省协同创新中心,河南洛阳471023 [3]铜陵金威铜业有限公司,安徽铜陵244000 [4]凯美龙精密铜板带(河南)有限公司,河南新乡453000

出　　处：《河南科技大学学报（自然科学版）》2022年第4期1-5,M0002,共6页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(52173297);河南省创新引领专项(191110210400)。

摘　　要：对冷轧态不同厚度C19400铜合金带材进行不同弯曲半径90°V形折弯,测量了折弯后的回弹,观察了折弯后带材外表面形貌。借助金相显微镜分析了带材折弯前后的微观组织。研究结果表明:厚度相同时,回弹量随着弯曲半径的增大而增大;弯曲半径相同时,回弹量随厚度的增大而减小。当带材厚度较薄(<0.5 mm)时,在不同弯曲半径下折弯,带材折弯表面均光滑平整;当带材厚度增大(≥0.5 mm)时,随着弯曲半径的减小,表面出现橘皮、裂纹缺陷。带材厚度增大,局部出现不连续纤维,这也是造成带材折弯表面出现橘皮、裂纹的主要原因。试验范围内带材厚度为0.4 mm、折弯半径为0.16 mm时,回弹量小且带材折弯表面良好。Cold-rolled C19400 copper alloy strip with different thickness was bent by 90°V bending with different bending radius.The springback after bending was measured,and the outer surface morphology of the bent strip was observed.The microstructure of the strip before and after bending was analyzed by using metallographic microscope.The results show that when the thickness is the same,the springback increases with the increase of bending radius.When the bending radius is the same,the springback decreases with the increase of thickness.When the thickness of the strip is thin(<0.5 mm),the surface is smooth and flat when bending under different bending radius.When the thickness of strip increases(≥0.5 mm),orange peel and cracks appear on the surface with the decrease of bending radius.With the increase of strip thickness,discontinuous fibers appear locally,which is also the main reason for orange peels and cracks on the bent surface of strip.When the thickness of strip is 0.4 mm and the bending radius is 0.16 mm in the test range,the springback is small and the bending surface of strip is good.

关 键 词：C19400 折弯性能 回弹量 弯曲半径 

分 类 号：TG146.1[一般工业技术—材料科学与工程]