含锡铁素体不锈钢夹杂物的冶金行为

基于新型含锡铁素体不锈钢，采用冶金反应平衡对其冶炼过程进行实验室条件下的研究分析了锡在不锈钢冶炼过程的收得率及锡的添加对不锈钢基体的微观结构的影响规律，分析脱氧夹杂物的形貌和成分演变结果表明，尽管锡的熔点极低，其收得率较高;锡在硫化锰周围富集现象比较明显，夹杂物周围被锡包裹，电镜下呈白色，氧化物夹杂周围未见锡的富集;从金相分析结果发现，当锡质量分数不小于03%时，晶界析出物中锡的质量分数高于基体，即存在锡在晶界的偏析现象.

Metallurgical Behavior of Inclusions in Tin Containing Ferritic Stainless Steel

The smelting process of the new tin contained ferritic stainless steel was studied based on metallurgical reaction balance under laboratory condition. The yield of tin in the melting process of the stainless steel and the effects of the addition of tin on the microstructure of stainless steels were analyzed. The formation and evolution of inclusions formed in deoxidation process of molten stainless steel were also analyzed. The results showed that the yield of tin was pretty high regardless of its low melting point. The enrichment of tin around the sulfide inclusions was found in scanning electron microscope pictures and it is white in SEM， while it was not found in or around the oxide inclusions. From the metallographic analysis， tin segregated to the grain boundary when its content was higher than 0.3%.