大梁钢纵剪边部缺陷对U型槽加工的影响  

Influence of Longitudinal Shear Edge Defects of Girder Steel on U-groove Machining

作　　者：李建军 张军锋 于领 曹日昊 Li Jianjun;Zhang Junfeng;Yu Ling;Cao Rihao(Tangshan Iron and Steel Group Gaoqiang Automobile Plate Co.,Ltd.,Tangshan Hebei 063016)

机构地区：[1]唐山钢铁集团高强汽车板有限公司,河北唐山063016

出　　处：《山西冶金》2022年第6期24-25,45,共3页Shanxi Metallurgy

摘　　要：利用光镜、夏比冲击和拉伸等方法,分析了厚规格700L辊压开裂的原因,结果表明:7.8 mm厚规格700L在辊压过程中出现开裂现象与用户剪切过程中带钢边部质量有关,当带钢纵剪剪切面出现凹凸不平、毛刺和掉肉等缺陷时,在辊压过程中断面微观裂纹得以扩展,最终造成辊压开裂现象。By means of light mirror,Charpy impact and tension,the causes of rolling cracking of thick 700 L are analyzed.The results show that the cracking phenomenon of 7.8 mm thick 700 L in the rolling process is related to the edge quality of the strip steel in the user’s shearing process.When the defects such as unevenness,burr and meat loss appear on the longitudinal shear surface of the strip steel,the micro crack of the section can expand in the rolling process,resulting in the rolling cracking phenomenon.

关 键 词：大梁钢 辊压成型 U型槽 

分 类 号：TG315.55[金属学及工艺—金属压力加工]