FeCrAl不锈钢液固相线的计算与研究  

Calculation and study of liquidus and solidus for FeCrAl stainless steel

作　　者：韩志彪 刘建华[1] 何杨[1] 季益龙[1] 刘建[1] 李康伟[1] 

机构地区：[1]北京科技大学冶金工程研究院,北京100083

出　　处：《钢铁研究学报》2016年第3期40-47,共8页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51374023)

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。To obtain the formulae suitable to calculate solidus and liquidus temperatures of FeCrA1 stainless steel, the liquidus and solidus temperatures were measured by differential scanning calorimetr （DSC） at different heating rates. The liquidus temperatures were also calculated by Thermo-Calc software and empirical formulae separately. The comparison between the two calculations and DSC results indicate that certain formula can figure out the liqui- dus temperatures more accurately than Thermo-Calc software. The comparison between Thermo-Calc calculations performed under the Scheil model and solidus determined by DSC indicate that the solidus temperature can be well determined from solid fraction （fs） vs. temperature curves at fs=0.99. Then the solidus temperatures of Fe-Cr- Al ternary system and Fe-Cr-Al-X（X= C,Si,Mn） multicomponent systems were calculated using the above meth- ods and the effects of different elements on the solidus temperatures of Fe-Cr-A1 ternary system were analyzed as well. Finally, a formula proper to calculate the solidus temperature of FeCrA1 stainless steel was obtained.

关 键 词：FeCrAl不锈钢 差示扫描量热法(DSC) 液相线 固相线 THERMO-CALC软件 

分 类 号：TG142.71[一般工业技术—材料科学与工程]