Kinetics of austenite grain growth of 15Cr12CuSiMoMn steel

doi:10.13251/j.issn.0254-6051.2022.02.010

Abstract

Abstract: 15Cr12CuSiMoMn steel was heated to the austenitizing temperature range between 900-1100 ℃ in a box-typed furnace for 15-120 min respectively. The growth behavior of prior austenite grains under different austenitizing temperatures and soaking time was studied. The experimental results show that with the increase of austenitizing temperature, the grain size increases continuously, and the growth behavior shows a law of power function. Heated above 1000 ℃, grain coarsens obviously. With the prolongation of time, the grain growth behavior is similar to the parabolic uniform deceleration law. When the soaking time is less than 60 min, the grain growth rate is faster, and tends to be stable when the soaking time is more than 60 min. Based on Arrhenius formula, a dynamic model of grain growth is established through the linear regression analysis of experimental data. The error(2%＜ΔXi＜5%) between model calculation and actual measured data is compared and the accuracy and reliability of the model are verified.

Key words: 15Cr12CuSiMoMn steel, austenite grain growth behavior, dynamic model, grain size

CLC Number:

TG142.1

Yang Jie, Ren Huiping, Liu Zongchang. Kinetics of austenite grain growth of 15Cr12CuSiMoMn steel[J]. Heat Treatment of Metals, 2022, 47(2): 53-58.

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