| 40CrMnSiMoVA钢中准贝氏体组织的疲劳强度和疲劳缺口敏感性 |
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| 引用本文： | 谭若兵,王禹,陈大明,康沫狂.40CrMnSiMoVA钢中准贝氏体组织的疲劳强度和疲劳缺口敏感性[J].航空学报,1991,12(3):187-191. |
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| 作者姓名： | 谭若兵 王禹 陈大明 康沫狂 |
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| 作者单位： | 西北工业大学
(谭若兵，王禹，陈大明)，西北工业大学(康沫狂) |
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| 摘 要： | 本文研究了超高强度40CrMnSiMoVA钢中准贝氏体组织和马氏体组织的疲劳强度。与马氏体组织相比,由贝氏体铁素体和残余奥氏体组成的准贝氏体组织,其光滑及缺口疲劳强度均较高。准贝氏体组织虽具有较低的强度,但因其中较多的残余奥氏体,结果并不损害其疲劳强度。由于该组织具有良好的强度、塑性、韧性配合,使其疲劳缺口敏感性较低。拉伸超载同时提高准贝氏体和马氏体组织的缺口疲劳强度。
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| 关 键 词： | 准贝氏体 疲劳强度 超载 |
THE FATIGUE STRENGTH AND FATIGUE NOTCH SENSITIVITY OF META-BAINITE IN 40CrMnSiMoVA STEEL |
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| Northwestern Polytechnical University Tan Ruobing,Wang Yu,Chen Darning and Kang Mokuang.THE FATIGUE STRENGTH AND FATIGUE NOTCH SENSITIVITY OF META-BAINITE IN 40CrMnSiMoVA STEEL[J].Acta Aeronautica et Astronautica Sinica,1991,12(3):187-191. |
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| Authors: | Northwestern Polytechnical University Tan Ruobing Wang Yu Chen Darning and Kang Mokuang |
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| Institution: | Northwestern Polytechnical University |
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| 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. |
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| Keywords: | meta-bainite fatigue strength overload |
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