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

金属学报(英文版), 2004, 17(4): 601-605.

^1, , ^2, , ^3, , ^4, , ^5,

1.Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China

2.Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China

3.Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China

4.Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China

5.Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China

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

Keywords： life assessment

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).

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

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