一、前言随着社会主义建设的需要,我厂大钢锭的生产愈来愈多。由于钢锭大,凝固时间长,在结晶过程中选分结晶的结果,使钢锭产生严重的偏析现象,致使低熔点的硫化物集聚,在钢材上形成长条状的硫化物,对横向塑性影响很大。如何解决大钢锭的偏析,是一个迫切需要解决的问题。为了减少偏析,改变结晶的自然进程,改善硫化物的形态,采取缩短镇静时间 I. Introduction With the needs of socialist construction, I plant more and more steel ingot production. Due to the large ingot, solidification time, the crystallization results in the election during the crystallization process, so that serious segregation of the ingot, resulting in low melting point sulfide accumulation in the strip formed on the strip sulfide, a great impact on the transverse plastic . How to solve segregation of large ingot is an urgent problem to be solved. In order to reduce the segregation, change the natural process of crystallization, improve the morphology of sulfides, take to shorten the sedation time