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钼的氧化问题是近来各国学者们注意的重要问题之一。要发展能在1000℃以上长期工作的耐热合金,钼基合金是很有希望的一个。它的优点是:基体金属钼的熔点高(约2625±25℃),在高温下抗蠕变性能好;但缺点是:基体金属钼极易氧化,特别是在高于795℃(MoO_3的熔点)时很快便挥发掉,造成“災害性”的氧化现象。近来关于氧化过程的测量多采用热天秤,这种方法比较多的是用来测量不受应力状态下的氧化过程;可是,在实际使用过程中耐热合金几乎大都是在应力状态下工作的。在应力状态下氧化过程一般均加速,本文即报导用扭摆法试探研究应力状态下钼氧化的初步结果。
The oxidation of molybdenum is one of the important issues that scholars of various countries have paid attention to recently. To develop long-term work in 1000 ℃ heat-resistant alloy, molybdenum-based alloy is a very promising one. Its advantages are: the base metal molybdenum melting point is high (about 2625 ± 25 ℃), good creep resistance at high temperature; but the disadvantage is: the base metal molybdenum easily oxidized, especially above 795 ℃ (MoO3 melting point ) Will soon evaporate, resulting in “disastrous” oxidation. Recently, the use of hot scales for the measurement of oxidation processes mostly uses this method to measure the oxidation process without stress. However, most of the heat-resistant alloys work under stress during actual use. In the stress state of the oxidation process are generally accelerated, this article reports the use of twist test tentative study of stress state molybdenum oxidation preliminary results.