SCM415带钢冲压制耳缺陷分析  

Analysis of ear defects of SCM415 strip steel

作　　者：王舒扬[1] 洪巨锋 王健[1] WANG Shuyang;HONG Jufeng;WANG Jian(Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China)

机构地区：[1]宝山钢铁股份有限公司中央研究院,上海201999

出　　处：《宝钢技术》2022年第6期8-13,共6页Baosteel Technology

摘　　要：采用金相及EBSD对有无制耳样品金相组织及晶粒尺寸进行统计分析,结果表明,制耳样品相比正常样品晶粒相对粗大且粗细不均,此外,制耳样品渗碳体分布不均匀,个别位置存在珠光体未完全球化的现象;采用EBSD方法对两者厚度不同位置进行织构分析,结果表明,制耳样品的(100)<110>和(112)<110>轧态织构组分明显高于正常样品,且从厚度表层到中心位置,其(100)<110>和(112)<110>轧态织构含量增加,这些轧态织构的存在会导致各向异性指数Δr<0,从而使材料在深冲过程中产生制耳。Metallography and EBSD are used to analyze the metallographic structure and grain size of samples with and without earing.The results show that the grains of eared samples are relatively coarse and uneven compared with the normal sample.In addition,the cementite distribution is not uniform,and pearlite is not completely spheroidized at different positions.EBSD method is used to analyze the different positions of thickness of the two samples.Texture analysis showed that the(100)<110>and(112)<110>texture components of eared samples were significantly higher than those of normal samples,and the contents of(100)<110>and(112)<110>textures increased significantly from the surface layer to the center of the thickness.The existence of these rolling textures would lead to the anisotropy indexΔr<0,which will made earing during deep-drawing.

关 键 词：制耳 金相组织 EBSD 织构分析 

分 类 号：TG115.52[金属学及工艺—物理冶金]