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主要对本钢产的车轮轮毂用钢BG420CL钢在冲压成型过程中出现的开裂进行了研究,通过低倍检验、金相检验及扫描电子显微镜断口观察发现钢板冲压开裂是连铸坯表面的裂纹缺陷残存在成品表面形成裂纹源而引起的。
Mainly on the steel wheel hub steel BG420CL steel stamping in the cracking process was studied by low magnification test, metallographic examination and scanning electron microscopy fracture observation found that steel stamping cracking is the surface of the slab cracks remain on the surface defects In the finished surface of the crack caused by the source.