摘要
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 carburizing resistance of a Ni-Cr-Fe base corrosion resisting alloy INCOLOY 800H had been studied. The outward appearance of the specimens changed apparently after keeping in the town-gas environment at 700, 800 and 900℃. Bursting and flaking off of the surface scale happened at 800 and 900℃, The flakes are composed of graphite, carbon and chromium oxide,and the sub-layer of the surface consists of chromium carbide, chromium oxide, iron oxide etc. The high temperature mechanical property changed also after the exposure, The yield strength increased due to the strengthening effect of the surface compounds , but the tensile strength and ductility decreased signifieantly with the increase of exposure temperature.
出处
《材料开发与应用》
CAS
1996年第5期11-16,共6页
Development and Application of Materials
关键词
镍铬铁基合金
耐蚀合金
耐热合金
组织
性能
Ni-Cr-Fe base heat resistant alloy, Incoloy 800H, High temperature carburization
