【摘要】 对不同规格的Q2 3 5热轧钢板冷弯裂纹试样进行了金相检验和电子探针等分析。结果表明,厚度为1 0mm的Q2 3 5热轧钢板宽冷弯裂纹主要是由板厚1 /4处存在大量的硫化锰夹杂物和磷的强偏析带所引起的;厚度为1 2mm的Q2 3 5热轧钢板宽冷弯裂纹主要是因板面存在一定深度的凹坑及微裂纹缺陷所造成的。更多还原

【Abstract】 Samples of hot rolled steel plate Q235 in various specifications having cold bending cracks are examined by means of Metallographical test and electron probe analysis.Results show that the primary cause to the defects of cold bending cracks for the hot rolled steel plate Q235 in 10?mm thickness is build-up of manganese sulfide inclusions in large quantity in the location of 1/4 thickness of the plate,while the cold bending cracks of the hot rolled plate in 12?mm thickness mainly result from defects of the dent pits and micro-cracks existing over the surface of the plate.更多还原