Comparison of austenite grain growth behavior of 20CrMnTi steel and 20 steel

doi:10.13251/j.issn.0254-6051.2023.10.006

Abstract

Abstract: Austenite grain growth behavior of 20CrMnTi steel and 20 steel under different holding temperatures (1000-1200 ℃) and different holding time (0-300 s) was studied. Based on the experimental results, a Sellars model describing austenite grain growth behavior was established. By comparing the average relative error (AARE) and correlation coefficient (R) between the calculated values of austenite grain growth model and the experimental values, the reliability of the model was verified. The experiment and simulation results show that the grain size of the steel increases obviously with the increase of heating temperature, and increases rapidly in the first 60 s with the increase of holding time, and then slows down. However, under the same test conditions, the austenite grain size of the 20CrMnTi steel is obviously smaller than that of the 20 steel and no abnormal grain growth occurs,indicating that the element addition of Ti has obvious effect on refining the microstructure.

Key words: 20CrMnTi steel, 20 steel, austenite, grain growth, Sellars model

CLC Number:

TG156.1

Xue Li, Zhang Liwen, Ding Haochen, Zhang Chi, Song Kangjie. Comparison of austenite grain growth behavior of 20CrMnTi steel and 20 steel[J]. Heat Treatment of Metals, 2023, 48(10): 45-49.

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