MORPHOLOGY OF MARTENSITE IN 7CrSiMnMoV STEEL AND ITS STRENGTH-TOUGHNESS

Acta Metall Sin

1991, Vol. 27

Issue (3): 77-81 DOI:

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MORPHOLOGY OF MARTENSITE IN 7CrSiMnMoV STEEL AND ITS STRENGTH-TOUGHNESS

WANG Ruixiang;GU Nanju;YIN Fuxing Hebei Institute of Technology; Tianjin

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WANG Ruixiang;GU Nanju;YIN Fuxing Hebei Institute of Technology; Tianjin. MORPHOLOGY OF MARTENSITE IN 7CrSiMnMoV STEEL AND ITS STRENGTH-TOUGHNESS. Acta Metall Sin, 1991, 27(3): 77-81.

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Abstract The morphology and substructure of martensites in 7CrSiMnMoV steelwere observed under optical or electron microscope, and martensitic transformationwith its morphology was also analysed. In the normally quenched steel three typesof martensites are found, including the wide lath one of dislocation substructure form-ed preferentially along grain boundaries, the thinner inner laths and the twinningmartensite plate in interior of grain. Therefore, an attempt was made to substitutelower bainite, formed by short-term isothermal quenching, for intergranular marten-site, it is believed that the morphology would be very influential to the strength-toughness of the steel.

Key words: 7CrSiMnMoV steel martensite strengthening

Received: 18 March 1991

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1991/V27/I3/77

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