EFFECT OF MANGANESE ON THE STABILITY OF AUSTENITE IN FE-CR-NI ALLOYS
EFFECT OF MANGANESE ON THE STABILITY OF AUSTENITE IN FE-CR-NI ALLOYS
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DOI：
10.1007/bf02664662
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发表时间：
1995-02-01
影响因子：
2.8
通讯作者：
RAGHAVAN, V
中科院分区：
文献类型：
--
作者：
RAGHAVAN, V
在Fe-Cr-Mn-Ni四元系中奥氏体和铁素体之间的相平衡已经在900 ° C至1150 ° C的温度范围内计算，使用最近的热力学相互作用参数。从计算结果，有效的Mn取代Ni作为奥氏体稳定剂已被评估作为一个功能的组成和温度。结果表明，对于18wt%的合金，Mn的Ni当量计算值接近于零，当Cr含量较高时，Mn的Ni当量变为负值，这是相当不合理的。Mn在200型不锈钢中的作用不是稳定奥氏体，而是补充Cr在增加N在奥氏体中的溶解度方面的作用，N似乎是更重要的奥氏体稳定元素。
The phase equilibria between austenite and ferrite in the Fe-Cr-Mn-Ni quaternary system have been computed in the temperature range of 900 degrees C to 1150 degrees C, using recent thermodynamic interaction parameters. From the computed results, the effectiveness of Mn in replacing Ni as an austenite stabilizer has been evaluated as a function of composition and temperature. The results show that, for 18 wt pet er alloys, the computed Ni equivalent of Mn is around zero and becomes negative at higher Cr contents, which is rather surprizing. The function of Mn in 200-type stainless steels is then not so much to stabilize austenite but to supplement the role of Cr in increasing the solubility in austenite of N, which appears to be the more important austenite-stabilizing element.