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Remarkable Improvement of Creep Strength by Vanadium Addition in 2.25Cr Heat-Resistant Steel

机译:通过添加2.25Cr耐热钢中的钒显着改善蠕变强度

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This paper reports the effect of vanadium (V) addition on elimination of easily coarsening M_(23)C_(6) carbide and on remarkable creep strength improvement in T/P23 heat-resistant steel (2.25Cr-1.5W-VNbTi). Increase in V content eliminates coarse M_(23)C_(6) and allows only precipitation of MX carbo-nitrides in T/P23 heat-resistant steel. Fine MX effectively stabilizes sub-boundaries of bainite microstructure, so coalescence of neighboring sub-boundaries and subsequent creep strength loss are suppressed. This steel even surpasses the creep life of conventional 9 wt.% Cr steels due to powerful sub-boundary hardening.
机译:本文报道了添加钒(V)对消除容易粗化的M_(23)C_(6)碳化物以及T / P23耐热钢(2.25Cr-1.5W-VNbTi)的显着蠕变强度改善的影响。 V含量的增加消除了粗M_(23)C_(6),并且仅允许在T / P23耐热钢中析出MX碳氮化物。细MX有效地稳定了贝氏体微观结构的子边界,因此可以抑制相邻子边界的合并和随后的蠕变强度损失。由于强大的亚边界硬化,该钢甚至超过了传统的9 wt%Cr钢的蠕变寿命。

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