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利用恒温氧化试验,研究了不同总氧含量的Fe-36Ni因瓦合金在1000℃和1100℃下的高温氧化行为,通过SEM分析了两种试样在不同温度下氧化层的截面形貌的差异并比较了两者氧化增重曲线的不同。试验结果表明,氧化温度和钢内总氧含量能显著影响Fe-36Ni因瓦合金的晶间内氧化行为;氧化温度越高,反应物质扩散越快,晶间内氧化层厚度越大,氧化越严重;钢内总氧含量较高时,有利于反应物质沿晶界扩散,从而造成更严重的晶间内氧化现象。
The oxidation behavior of Fe-36Ni invar alloy with different total oxygen content at 1000 ℃ and 1100 ℃ was investigated by means of a constant temperature oxidation test. The cross-sectional morphologies of the oxide layers of the two samples at different temperatures were analyzed by SEM The difference between the two curves was also compared. The results show that the oxidation temperature and the total oxygen content in the steel can significantly affect the intergranular oxidation behavior of the Fe-36Ni invar alloy. The higher the oxidation temperature, the faster the diffusion of the reactive species and the greater the thickness of the oxide layer in the intergranular. Serious; high total oxygen content in the steel is conducive to the diffusion of reactants along the grain boundaries, resulting in more serious oxidation within the intergranular.