低碳冲压钢板桔皮缺陷的成因  

Formation mechanism of orange peel defects in low carbon deep drawing steel sheets

作　　者：李萧[1] 杨平[1] 林瑞民[2] 刘西峰[2] 陈冷[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]唐山建龙实业有限公司,遵化064200

出　　处：《北京科技大学学报》2010年第5期589-594,共6页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50771019)

摘　　要：利用扫描电镜(SEM)、X射线衍射(XRD)和电子背散射衍射(EBSD)技术,针对SPCD冷轧板冲压制品中的桔皮缺陷的成因进行分析,探讨了晶粒取向可能对桔皮产生的影响.结果表明:铁素体晶粒过度粗大是导致冲压件表面产生桔皮缺陷的根源;{111}织构强度较弱和较大冲压量是加剧桔皮产生的两个因素.桔皮自由表面由平缓区和粗糙区组成,两个区域均显现以{112}〈110〉与{111}〈110〉为主导的取向特征,表明表面形貌与晶粒取向的对应性不显著,表面接触状况不同是造成这种形貌差异的主要原因.Taking batch annealed SPCD steel sheets as an example,orange peel defects in the surface of sheet stamping concerning with their formation mechanism and dependence on grain orientation were investigated by means of SEM,XRD and electron backscatter diffraction （EBSD） techniques.The results show that the orange peel defects are resulted from excessively coarse ferrite grains,whereas weak favorable {111} texture and a larger stamping value might be the key factors aggravating the formation of orange peel defects.Different morphologies featured by smooth and rough zones on the free surface of orange peel do not show remarkable dependence on grain orientation,and both display orientation feature with dominant {112}〈110〉 and {111}〈110〉 textures.The surface contact condition plays an important role in the surface morphology.

关 键 词：低碳钢 冲压钢板 缺陷 形成机理 取向 

分 类 号：TG386.4[金属学及工艺—金属压力加工]