37Mn5钢连铸圆坯的裂纹成因分析
Causes Analysis on Cracks of Continuous Casting Round Billet of 37Mn5 Steel
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摘要: 使用光学显微镜、扫描电子显微镜等设备,结合实际操作工艺,分析了某37Mn5钢连铸圆坯表面产生纵向裂纹的原因.结果表明:生产中工艺操作不当,材料出连铸机后上冷床快速冷却是铸坯产生纵向裂纹的根本原因;偏高的过热度和连铸拉速,促进了裂纹的形成与扩展.Abstract: Combined with the actual operation process,the causes of longitudinal cracks on the billet surface of 37Mn5 steel were analyzed by optical microscope and scanning electron microscope (SEM).The results show that the primary reason for the longitudinal cracks on billet was the improper operation of rapid cooling on cooling bed after continuous casting,and the higher overheating temperature and casting speed accelerated the formation and expansion of the cracks.