Prediction of austenitization kinetics of 5CrNiMoV steel

doi:10.13251/j.issn.0254-6051.2020.09.042

Abstract

Abstract: Dilations of 5CrNiMoV steel at different heating rates were measured by utilizing DIL-805ADT dynamic dilatometer,and dilationcruve was analyzed.Kinetic parameters in the Johnson-Mehl-Avrami (J-M-A) model for non-isothermal diffusion phase transitions were fitted from the dilation data using the Kissinger method.Such kinetic parameter as the activation energy Q,exponent n and lnk₀ are determined to establish kinetic model for austenization.Calculated amounts of transformed austenite are in good agreement with the experimentally observed.The model can be used to predict isothermal austenization and to design austenitization process of the 5CrNiMoV steel in engineering practice.

Key words: 5CrNiMoV steel, austenitization, transformation kinetics, J-M-A transformation model

CLC Number:

TG142.33

Peng Xu, Bu Hengyong, Li Mengnie. Prediction of austenitization kinetics of 5CrNiMoV steel[J]. Heat Treatment of Metals, 2020, 45(9): 227-232.

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