Study on Creep Rupture Strength and Microstructure of 10Cr-2Mo-V-Nb Steel

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  • 10Cr-2Mo-V-Nb鋼の高温特性と微細組織に関する研究
  • 10Cr 2Mo V Nb コウ ノ コウオン トクセイ ト ビサイ ソシキ

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Abstract

In order to develop a new ferritic heat-resisting steel that have high creep rupture strength, good weldability and oxidation resistance at the temperature of 600°C, we performed creep rupture tests, mechanical tests, microstructure observation by transmission electron microscope and X-ray diffraction analysis of electrolytic extraction residue of tested steel.<BR>Main resuhs are as follows:<BR>(1) It was found that the creep rupture strength of 0.05C-10Cr-2Mo-0.1V-0.05Nb steel was superior to that of SUS 304 steel at the temperature of 600°C.<BR>(2) This steel comprises two structure of delta ferrite and tempered martensite. Main precipitation at longer term are M23C6 and Fe2Mo at 600°C-700°C. The precitation of Fe2Mo type in delta ferrite would increse favorably the high temperature strength as well as the M23C6 and M6C carbides.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 65 (7), 886-895, 1979

    The Iron and Steel Institute of Japan

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