转炉炼钢过程中,尽管炉壳不与金属液直接接触,但是由于反应产生的高温以及CO_2、CO等气体,通过炉衬耐火材料影响炉壳,使炉壳内表面渗碳,特别是涂在炉衬耐火材料表面的焦油燃烧,加剧炉壳内表面渗碳,因此炉壳使用1—3个月后由于渗碳引起龟裂,对裂纹进行焊接时,由于渗碳 Although the furnace shell is not in direct contact with molten metal during the converter steelmaking process, the inner surface of the furnace shell is carburized due to the high temperature generated by the reaction and the gases such as CO 2 and CO, which are affected by the refractory lining material, Refractory surface of tar burning, exacerbation of carburizing the inner surface of the furnace shell, so 1-3 months after the furnace shell due to carburization caused by cracking, the crack welding, due to carburizing