特殊钢连铸大方坯内部质量问题研究现状

Summary of Internal Quality Problems of Special Steel Continuous Casting Blooms

综述了几种典型特殊钢(轴承钢、弹簧钢等)大方坯的连铸技术,举例说明了低过热度浇注、电磁搅拌和轻压下技术的应用,对铸坯的内部质量的改善,以及铸坯内部微观偏析、宏观偏析与碳化物不均匀性的成因及改善措施,说明电磁搅拌和轻压下技术对于改善铸坯内部的偏析情况的重要意义。

The continuous casting techniques of several typical special steels(bearing steel and spring steel)slab were reviewed.The applications of low and superheat casting,electromagnetic stirring and light pressing were illustrated.The improvement of internal quality of slabs,the causes of micro segregation,macro segregation and carbide unevenness of slabs and the improvement measures indicate the important significance of electromagnetic stirring and light pressing technology in improving the internal segregation of slabs.