摘要
采用热力学分析方法,对固态不锈钢304、304L、301S和301L(γ-相)以及奥氏体不锈钢熔体中氮溶解度进行了计算,得出了氮溶解度的计算模型;同时通过1 kg MoSi电阻炉对4种奥氏体不锈钢在1520～1580℃和33～100 kPa压力下的渗氮行为进行了实验研究。结果表明,氮在固态奥氏体不锈钢的γ-相中的溶解度最高;在常压冷却、凝固过程中存在的液相、δ-相至γ-相的转变;当不锈钢熔体中相对于δ-相过饱和的氮在钢中以气泡形式析出,则降低了奥氏体钢的氮含量,所以采用常压快速冷却或加压浇注有利于冶炼高氮奥氏体不锈钢。
The solubility of nitrogen in solid stainless steel 304, 304L, 301S and 301L （γ- phase） and in melts of austenite stainless steel has been calculated by using thermodynamic analysis method to get computational model for solubility of nitrogen in the steels, and the experimental research on nitriding behavior in four austenite stainless steels has been carried out by 1 kg MoSi electric resistance furnace with 33 - 100 kPa at 1 520 - 1 580℃. Results show that the solubility of nitrogen in γ- phase in solid austenite stainless steels is highest ; in cooling and solidifying process at normal pressure there is a transformation process from liquid phase, δ- phase to γ- phase; the nitrogen content in austenite steel shall decrease if supersaturated nitrogen to δ- phase in melt of stainless steel precipitates as gas bubble, so it is available to melt high nitrogen austenite stainless steel by using quick cooling at normal pressure or pressurized casting.
出处
《特殊钢》
北大核心
2010年第5期1-4,共4页
Special Steel
关键词
奥氏体不锈钢
氮溶解度热
力学计算
渗氮试验
Austenite Stainless Steel, Nitroge Solubility, Themodynamic Calculation, Nitriding Experiment
