REMAINING LIFE ASSESSMENT OF A 1Cr5Mo STEEL BY USING Z-PARAMETER METHOD
来源期刊：Acta Metallurgica Sinica2004年第4期
论文作者：S.Q.Han S.M.Xie H.B.Gao J.Zhao L.Wang
Key words：life assessment; spheroidization; carbides; creep rupture;
Abstract: Z-parameter method based on the Larson-Miller relationship is proposed to assess remaining life of a 1Cr5Mo steel. The non-linear master curve of stress σ vs. LarsonMiller parameter P of the steel can be expressed as: P=29.608-5.0851ogσ. A family of curves parallel to the master curve can be expressed as: P=29.608-Z-5.0851ogσ,where the value of Z represents the magnitude deviated from the master curve. A relationship between the value of Z-parameter and the level of spheroidization E (microstructural degradation) can be expressed as: Z=0.203(E-1).
S.Q.Han1，S.M.Xie1，H.B.Gao1，J.Zhao1，L.Wang1
(1.Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China)
Abstract:Z-parameter method based on the Larson-Miller relationship is proposed to assess remaining life of a 1Cr5Mo steel. The non-linear master curve of stress σ vs. LarsonMiller parameter P of the steel can be expressed as: P=29.608-5.0851ogσ. A family of curves parallel to the master curve can be expressed as: P=29.608-Z-5.0851ogσ,where the value of Z represents the magnitude deviated from the master curve. A relationship between the value of Z-parameter and the level of spheroidization E (microstructural degradation) can be expressed as: Z=0.203(E-1).
Key words:life assessment; spheroidization; carbides; creep rupture;
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