Kinetics of austenite grain growth of S34MnV steel

doi:10.13251/j.issn.0254-6051.2021.06.031

Abstract

Abstract: Austenitizing experiment of the S34MnV steel was carried out under different heating temperature and holding time by using DIL-805ADT dynamic dilatometer. The average grain sizes of austenite were measured by etching grain boundaries and optical microscope observation. And the austenite grain growth law of the S34MnV steel was intensively studied. Compared with Beck model, Hillert model and Sellers model, the model parameters were fitted and optimized according to the measured grain size data, and the kinetic model of austenite grain growth of the S34MnV steel was established. The results show that the calculated results of Sellars model are in good agreement with the measured data, which can be used to predict the austenite grain growth of the S34MnV steel in a temperature range of 880 ℃ to 920 ℃ when holding for 10 min to 240 min.

Key words: S34MnV steel, marine crankshaft steel, austenitic grain, grain growth model

CLC Number:

TG142.33

Yan Yong, Bu Hengyong, Li Mengnie, Zheng Shanju. Kinetics of austenite grain growth of S34MnV steel[J]. Heat Treatment of Metals, 2021, 46(6): 153-159.

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