40CrMnSiMoVA钢中准贝氏体组织的疲劳强度和疲劳缺口敏感性

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1991, Vol. 12 ›› Issue (3): 187-191.

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THE FATIGUE STRENGTH AND FATIGUE NOTCH SENSITIVITY OF META-BAINITE IN 40CrMnSiMoVA STEEL

Tan Ruobing, Wang Yu, Chen Darning, Kang Mokuang

Northwestern Polytechnical University

Received:1989-10-04 Revised:1990-03-07 Online:1991-03-25 Published:1991-03-25

Abstract

Abstract: The fatigue strength of meta-bainite and martensite in 40CrMnSiMoVA steel is studied. The results shows that the smooth and notch fatigue strength of the meta-bainite consisting of bainite ferrite and retained austenite is higher than that of martensite. The lower 0.2 value and larger retained austenite of meta-bainite do not lower the fatigue strength of the microstructure. Relatively, the fatigue notch sensitivity of the meta-bainite is low due to its good combination of strength, ductility and toughness. The overload tension increases the notch fatigue strength of both microstructures on the steel.

Key words: meta-bainite, fatigue strength, overload

Tan Ruobing;Wang Yu;Chen Darning;Kang Mokuang. THE FATIGUE STRENGTH AND FATIGUE NOTCH SENSITIVITY OF META-BAINITE IN 40CrMnSiMoVA STEEL[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1991, 12(3): 187-191.

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THE FATIGUE STRENGTH AND FATIGUE NOTCH SENSITIVITY OF META-BAINITE IN 40CrMnSiMoVA STEEL

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