论文部分内容阅读
对含碳量为０．５０－２．６３％的Ｆｃ－Ｃｒ－Ｍｎ合金在８００℃下含硫混合气氛中进行腐蚀试验．用Ｘ射线物相分析法分析了腐蚀产物种类及其相对含量，现实测定了元素在腐蚀产物中的分布及试样亚表层共晶碳化物的腐蚀行为。结果表明：试验合金比高Ｎｉ耐热钢具有高的抗腐蚀性；合金的腐蚀行为受硫化及氧化腐蚀双重制约，因而使合金的腐蚀增重呈现峰值，随气氛氧化性增强，峰值向低碳方向移动；共晶碳化物具有比金属基体略好的抗腐蚀性。
The corrosion test of Fc-Cr-Mn alloy with 0.50-2.63% carbon content was carried out in a sulfur-containing mixed atmosphere at 800 ℃. The species and relative content of the corrosion products were analyzed by X-ray phase analysis. The distribution of the elements in the corrosion products and the corrosion behavior of the subsurface eutectic carbides were measured. The results show that the corrosion resistance of the alloy is higher than that of Ni heat-resistant steel. The corrosion behavior of the alloy is double-controlled by sulfurization and oxidative corrosion, which leads to the peak value of corrosion weight gain of the alloy. Eutectic carbide has a slightly better corrosion resistance than a metal matrix.