REMAINING LIFE ASSESSMENT OF A 1Cr5Mo STEEL BY USING Z-PARAMETER METHOD

Abstract

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 δ vs. LarsonMiller parameter P of the steel can be expressed as: P=29.608-5.085logδ. A familyof curves parallel to the master curve can be expressed as: P=29.608-Z-5.085loyδ, 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

J.Zhao, S.Q.Han, S.M.Xie, H.B.Gao, L.Wang. REMAINING LIFE ASSESSMENT OF A 1Cr5Mo STEEL BY USING Z-PARAMETER METHOD[J]. Acta Metallurgica Sinica (English Letters), 2004, 17(4): 601-605 .

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REMAINING LIFE ASSESSMENT OF A 1Cr5Mo STEEL BY USING Z-PARAMETER METHOD

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