Fe-40%Ni合金的高温氧化行为

Oxidation behavior of Fe-40%Ni alloy at high temperature

采用测定高温下保温不同时间后氧化层厚度的方法讨论分析了Fe-40%Ni合金的高温氧化行为,并通过回归分析得到了预测氧化层厚度的数学模型。结果表明,当温度低于1000℃时,合金氧化层增加的趋势相对较缓,超过1000℃后显著加快。随保温时间的延长,氧化层厚度以一定的速度增加,并与保温时间呈近似线性的关系,而当温度较高时则逐渐向抛物线型转变。回归分析表明,合金的氧化层厚度(μm)可用h=6700×t^(0.44)×e^(-6870/T)计算。

Oxidation behavior of Fe-40%Ni alloy was studied by measuring the thickness of oxide layer generated at high temperature for different time,and the mathematical model for predicting the thickness of oxide layer was obtained by regression analysis.The results show that the thickness of oxide layer increases slowly when the temperature is lower than 1000℃,and increases significantly when the temperature is above 1000℃.With the extension of holding time,the thickness of oxide layer increases at a certain rate and has an approximate linear relationship with the holding time.At higher temperature,the relationship changes to parabolic type gradually.The result of regression analysis indicates that the oxide layer thickness(μm)can be calculated by the formula h=6700×t^(0.44)×e^(-6870/T).