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几种常用的铸造高温合金在燃烧天然气的锅炉里于700—850℃之间进行了长达一万三千小时的高温腐蚀试验。结果指出:K18合金发生严重的肿胀开裂;K3与K19合金则在表面上形成一些小凸包;其余的合金受腐蚀程度则较轻微。它们的抗蚀性能优劣顺序如下:FSX414,M38,537,K17G,K3,K19,K18。对产生的腐蚀现象与过程进行了详细地讨论,并且指出,合金表面氧化层中富Cr,Ti,Al层的存在是它具有良好的抗高温腐蚀能力的一个重要因素。
Several commonly used foundry superalloys have undergone up to 13,000 hours of high temperature corrosion testing at between 700 and 850 ° C in natural gas fired boilers. The results show that: K18 alloy severe swelling and cracking; K3 and K19 alloy is formed on the surface of some small convex hull; the rest of the corrosion by the alloy is minor. The order of their corrosion resistance is as follows: FSX414, M38, 537, K17G, K3, K19, K18. The phenomenon and process of corrosion are discussed in detail. It is also pointed out that the existence of rich Cr, Ti and Al layers on the surface of the alloy is an important factor for its good capability of resisting high temperature corrosion.