摘要
超级双相不锈钢S32760生产工艺流程为20tEAF→AOD→LF→30cm模铸。由于S32760成分设计中高铬、低磷、低硫、超低碳这一特点,冶炼后期钢水过氧化程度严重。为改善钢水洁净度、降低钢中氧质量分数,通过采取合理的脱氧造渣工艺,采用Al-Si-Ca复合脱氧,使钢中气体、夹杂物得到了有效控制,改善了钢水洁净度,成品钢中硫质量分数控制在0.002%以下,氧质量分数控制在0.004%以下。
The production process of super duplex stainless steel S32760 is 20t EAF→AOD→LF→30cm mold casting.As the feature of the S32760 composition design is high Cr,low P,low S and ultra-low carbon,the peroxidative degree of steel is serious in the later period of smelting.In order to improve the purity of molten steel and reduce the oxygen mass fraction in steel,the Al-Si-Ca composite deoxidation was adopted,which effectively controlled the gas and inclusions in steel and improved the purity of molten steel.The sulfur and oxygen mass fraction in the finished steel were stably controlled less than 0.002% and 0.004%,respectively.
作者
崔利民
张欣杰
才丽娟
CUI Li-min ZHANG Xin-jie CAI Li-juan(Technology Center, AVIC Shangda Super Alloys Co. , Ltd. , Xingtai 054800, Hebei, China Hebei Engineering Research Center for Special Alloy Regeneration, AVIC Shangda Super Alloys Co. , Ltd. , Xingtai 054800, Hebei, China)
出处
《中国冶金》
CAS
2017年第9期44-47,共4页
China Metallurgy
关键词
S32760
吹氩
脱氮
工艺实践
S32760
argon blowing
denitrogenation
process practice