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研究了镍－铬－铁基耐蚀耐热合金ＩＮＣＯＬＯＹ８００Ｈ的高温抗碳化性能。该合金经７００℃、８００℃和９００℃城市煤气环境中长期保持后，其外观明显变化，８００℃及９００℃样品外表层严重剥落，剥落层主要由石墨、碳及氧化铬组成。而次表层则为碳化铬、氧化铬、氧化铁等混合物组成。经碳化后合金的高温机械性能有明显变化，屈服强度因表层化合物的强化作用而升高，抗拉强度及伸长率则下降，碳化温度越高则降低越显著。
The high temperature carbonization resistance of nickel-chromium-iron-based corrosion-resistant alloy INCOLOY800H was studied. After long-term holding in urban gas environment of 700 ℃, 800 ℃ and 900 ℃, the appearance of the alloy obviously changed. The outer surface of the samples at 800 ℃ and 900 ℃ were severely exfoliated. The flaking layer mainly consisted of graphite, carbon and chromium oxide. While the sub-surface is chromium carbide, chromium oxide, iron oxide and other mixtures. The high temperature mechanical properties of the alloy after carbonization significantly change, yield strength due to the strengthening effect of surface compounds increased, tensile strength and elongation decreased, the higher the carbonation temperature, the more significant reduction.