Effects of Temperature and Straining on the Oxidation Behavior of Electrical Steels
Effects of Temperature and Straining on the Oxidation Behavior of Electrical Steels
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DOI：
10.1007/s11085-009-9152-3
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发表时间：
2009-04
影响因子：
2.2
通讯作者：
C. Yang;S. Lin;C. Chen;W. Tsai
中科院分区：
文献类型：
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作者：
C. Yang;S. Lin;C. Chen;W. Tsai
研究了在850~1200℃干燥空气中，硅含量(0.01~1.91wt%)对电工钢结垢的影响。还探讨了外加拉伸应变对氧化行为的影响。利用热力模拟机(Gleeble Machine)进行了不同载荷条件下的氧化试验。实验结果表明，在1000℃时，氧化速率随钢中硅含量的增加而降低。内部氧化膜的形成主要由无定形二氧化硅组成，这是提高抗氧化性的原因。然而，当温度升高到1200℃时，由于熔融共晶铁素体(Fe2SiO4)的形成，氧化速度大大增加。在很短的氧化时间内，应变条件下，含1.91wt%Si的钢的内部氧化膜结构略有改变，但氧化膜厚度几乎不变。
The effect of Si content (in the range of 0.01–1.91 wt%) on scale formation of electrical steels in dry air at temperatures ranging from 850 to 1200 °C was investigated. The effect of applied tensile strain on oxidation behavior was also explored. A thermo-mechanical simulator (Gleeble machine) was employed to conduct the oxidation tests at different load conditions. The experimental results showed that at 1000 °C the oxidation rate decreased with increasing Si content in the steel. The formation of an inner scale, mainly consisting of amorphous silica, was responsible for the improved oxidation resistance. However, a substantial increase in oxidation rate due to the formation of molten eutectic fayalite (Fe2SiO4) was observed when the temperature was raised to 1200 °C. Under straining conditions at a very short oxidation time, the inner scale structure was slightly modified though the scale thickness remained almost unchanged for the steel containing 1.91 wt% Si.