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本文采用化学分析、高低倍测试和电子探针等手段,对现阶段生产条件下18-8型不锈钢钢坯开裂(呈人字型)的属性进行了讨论,指出开裂原因主要是铬镍当量比过高,形成过多的α相;其次是浇钢时钢渣翻入钢锭表面;过高的加热温度使晶粒粗化和有害元素的含量也有影响。防止的措施是:冶炼时在节镍的同时必须保证适当的Cr/Ni当量比,严格控制有害元素;严格掌握浇钢工
In this paper, chemical analysis, high and low magnification test and electronic probes and other means, under the current production conditions of 18-8 stainless steel billet cracking (was herringbone) attributes were discussed, pointed out that the main reason for the cracking of chromium than nickel equivalent High, the formation of excessive α phase; followed by pouring steel slag poured into the ingot surface; high heating temperature so that the grain coarsening and harmful elements also have an impact. To prevent the measures are: nickel smelting at the same time must ensure that the appropriate Cr / Ni equivalent ratio, the strict control of harmful elements; strictly master the steelworks