FeCrAl不锈钢液固相线的计算与研究

发布时间：2018-08-31 20:11

【摘要】：为获得适合FeCrAl不锈钢的液固相线计算公式,采用DSC在不同升温速率下测定了其液固相线,并采用Thermo-Calc软件和经验公式分别计算了液相线。计算结果与DSC试验结果的比较表明特定的经验公式相比Thermo-Calc软件能够更加准确地计算FeCrAl不锈钢的液相线。Scheil模型下的Thermo-Calc凝固计算与DSC实测固相线的比较分析表明固相分率(fS)-温度曲线上fS=0.99对应的温度可以作为FeCrAl不锈钢的固相线。采用上述方法分别计算Fe-Cr-Al三元系和Fe-Cr-Al-X(X=C,Si,Mn)多元系的固相线,分析不同组元对Fe-Cr-Al三元系固相线的影响,最终得到了适合FeCrAl不锈钢的固相线计算公式。
[Abstract]:In order to obtain the liquid-solid line calculation formula suitable for FeCrAl stainless steel, the liquid-solid line was measured by DSC at different heating rates, and the liquid-solid line was calculated by Thermo-Calc software and empirical formula respectively. The comparison between the calculated results and the DSC test results shows that the Thermo-Calc solidification calculation of FeCrAl stainless steel based on the liquid line. Scheil model can be more accurately calculated by the Thermo-Calc software than by the specific empirical formula. The comparison analysis between the calculated results and the DSC measured solid state line shows that the solid phase can be calculated more accurately. The temperature corresponding to fS=0.99 on the (fS)-temperature curve can be used as the solid line of FeCrAl stainless steel. The solid state lines of Fe-Cr-Al ternary system and Fe-Cr-Al-X (XCX Si Si mn) multicomponent system were calculated by using the above method. The influence of different components on the solid state line of Fe-Cr-Al ternary system was analyzed. Finally, the solid state line calculation formula suitable for FeCrAl stainless steel was obtained.
【作者单位】：北京科技大学冶金工程研究院;
【基金】：国家自然科学基金资助项目(51374023)
【分类号】：TG142.71

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