MnCr／CrMo钢LF底吹氮气合金化工艺研究  

Experimental study on alloying by blowing nitrogen with the MnCr/CrMo steel in ladle furnace

作　　者：董大西[1] 杨峰功[1] 胡云生[1] 张永[1] 战东平[2] 邱国兴[2] 姜周华[2] 张慧书[3] 

机构地区：[1]石家庄钢铁有限责任公司炼钢厂,河北石家庄050031 [2]东北大学材料与冶金学院,辽宁沈阳110004 [3]辽宁科技学院冶金学院,辽宁本溪117004

出　　处：《炼钢》2015年第6期62-66,共5页Steelmaking

摘　　要：钢包底吹氮增氮是一种可节约氮化合金且利于降低成本的有效氮合金化方法。通过理论计算分析影响钢中氮含量溶解度的因素,确定了钢包底吹氮时机、压力等工艺条件,并在此基础进行了工业试验。结果表明,吹氮压力越大,钢液中氮含量越大,吹氮压力升高0.2 MPa,氮的溶解度增加25×10^(-6);吹氮流量越大,钢中氮含量也越大,但是吹氮流量的影响远没吹氮压力显著。对于成品w(N)=(100~150)×10^(-6)的钢种,仅采用底吹氮工艺完全可以满足钢中氮含量控制需要,不需要添加含氮合金即可完成氮微合金化过程。Increasing nitrogen by blowing nitrogen at the bottom of the furnace is an ef- fective nitrogen alloying method which can save the nitrogen alloy and reduce the cost. The factors of the solubility of nitrogen in steel were analyzed by theoretical calculation, and the technological conditions of the time and pressure of the ladle bottom blowing were determined, then the experiments of industrialization have been carried out. The results showed that the mass fraction of nitrogen increased with the increase of pressure and flow rate, the nitrogen pressure increased by 0.2 MPa and the solubility of nitrogen increased by 25 ×10^-, but the impact of the flow is far from the pressure. The steel whose nitrogen mass fraction was （100 - 150） ×10^- could be producted by means of bottom blowing nitrogen without adding nitrogen nitride.

关 键 词：炼钢 氮合金化 热力学 LF 底吹 

分 类 号：TF769.2[冶金工程—钢铁冶金]