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在高温高压反应釜内冶炼Cr12N高氮钢,通过试验发现,在Cr12N的熔炼过程中,随着压力的提高,钢中的氮含量不断增加,钢锭中得到的固相中氮的饱和溶解度和Chipman等人的热力学模型计算得到的氮的饱和溶解度有一定的偏差,为了修正这个偏差,引进了Burton-Prim-Slichter方程,修正后得到液相中氮的饱和溶解度的修正值和计算值吻合得很好。计算了在Cr12N的冶炼过程中,防止气泡析出所需要的最小凝固压力为2.84 MPa,通过试验发现,在高的凝固压力下,钢锭的致密性和缩孔现象得到明显改善。
In the high temperature and high pressure reactor smelting Cr12N high nitrogen steel, the experiment found that in the Cr12N smelting process, with the increase of pressure, the nitrogen content of steel increasing, the solid phase obtained in ingot nitrogen saturation solubility and Chipman In order to correct this deviation, the Burton-Prim-Slichter equation was introduced and the corrected value of the saturation solubility of nitrogen in the liquid phase was in good agreement with the calculated value it is good. Calculated in the smelting process of Cr12N, to prevent the minimum required coagulation pressure of 2.84 MPa, through the test found that the high solidification pressure, the ingot densification and shrinkage phenomenon has been significantly improved.