氮、铌和稀土微合金化的25-12铸钢的显微组织

钢铁, 1999, 34(11): 55-58.

1.华南理工大学

2.华南理工大学

3.广州有色金属研究院

MICROSTRUCTURE OF 25-12 AUSTENITIC HEAT-RESISTANT CAST STEEL MICROALLOYED WITH N, Nb AND RE

研究了经氮,铌和稀土微合金化的25-12奥氏体耐热铸钢的显微组织.淬火时效组织由树枝状初晶奥氏体基体及分布于枝晶间的M23C6碳化物组成;锅炉燃煤喷嘴的烧嘴区显微组织中含有M23C6碳化物、富含稀土元素(RE)的氮碳化物ε-(Cr、Fe)2(N,C)和σ相.

[1]	Wilson F G.Mechanism of Intergranular Corrosion of Austenitic Stainless Steels-literature Review[J].British Corrosion Journal,1971(06):100.
[2]	Kikuchi M .Cellular Precipitation Involving Both Substitutional and Interstitial Solutes: Cellular Precipitation of Cr2N in Cr-Ni Austenitic Steels[J].Materials Science and Engineering A,1991,A146:131.

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