含氮不锈钢氮气增氮的实验及工艺

通过采用氮气增氮的实验,研究了钢液的化学成分、冶炼温度、表面活性元素和吹氮流量对钢液增氮的影响.研究结果表明:钢中的合金元素尤其是Mn、Cr等元素能够增大钢液氮的溶解度;冶炼温度提高,钢液的增氮速率增大;钢中的氧对钢液的增氮有很大的阻碍;吹氮流量增大则钢液的增氮速率相应增大.同时对含氮不锈钢采用吹入氮气增氮工艺进行了探讨,为含氮不锈钢的生产提供了参考.

Experiment and technology of adding nitrogen in nitrogen-containing stainless steels by blowing nitrogen gas

Based on the experiment of adding nitrogen in nitrogen-containing stainless steels by blowing nitrogen gas, the influencing factors including chemical compositions, temperature, superficial active elements and nitrogen-flow rate to molten steel's nitrogen absorbing were studied. The experimental results show that some alloy elements such as Mn and Cr can raise the nitrogen solubility in the molten steel;the temperature of molten steel increases, the rate of absorbing nitrogen increases correspondingly;the oxygen content in molten steel keeps molten steel from absorbing nitrogen;the nitrogen flow rate increases, the rate of absorbing nitrogen increases correspondingly. And the production process was discussed, which provides reference for adding nitrogen in nitrogen-containing stainless steels steelmaking process by blowing nitrogen gas.