新型高氮无镍不锈钢熔炼增氮效果分析

Analysis on Nitrogen Absorption of New Nickel-Free High Nitrogen Stainless Steel

为了研究喷吹氮气和添加氮化铬铁合金对钢液的增氮效果,在50kg真空感应熔炼炉上通过改变氮气分压、温度和添加氮化铬铁合金熔炼高氮无镍不锈钢(17Cr12Mn2Mo),并将试验结果与理论计算结果进行比较。试验表明,通过改变氮气分压、温度能够冶炼含有一定氮含量的不锈钢,增加氮气分压的增氮效果较改变温度更明显,当氮气分压达到0.65MPa时,实测氮含量可达到理论值;添加含氮合金熔炼高氮不锈钢,其增氮效果比调节温度、氮气分压明显,且实际氮含量比理论值高。

In order to research the effect of nitrogen absorption with blowing N2 and adding FeCrN alloy to the liquid steel,the nick-free high nitrogen stainless steel（17Cr12Mn2Mo） was smelted on the 50 kg vacuum induction melting furnace by changing the nitrogen pressure,temperature and adding FeCrN alloy.The result was compared to the theoretical calculation.The results show,stainless steel with certain nitrogen content can be smelted through changing nitrogen pressure and temperature,and the effect of increasing nitrogen pressure is much better than changing temperature,when the nitrogen pressure is up to 0.65 MPa,the actual result is equal to the theoretical calculation;the effect of adding FeCrN alloy is better than increasing nitrogen press and controlling temperature,and the actual result is higher than the theoretical calculation.