Austenite grain growth behaviour of 42CrMo steel during heating

作者：Li, Wei; Chen, Wen Lin; Wu, Yue; Yang, Dong; Zhou, Xiang

来源：Transactions of Materials and Heat Treatment, 2015, 36(1): 104-108.

• Austenite grain
• Austenite grain growths
• Austenite grain size
• Grain size
• Heating temperatures
• Non-linear regression method
• Phenomenological theory
• Quantitative metallography

Austenite grain growth behaviour of 42CrMo steel in the process of heating at different temperatures for different holding time was investigated. The austenite grain size of 42CrMo steel was measured by quantitative metallography method, and the austenite grain growth model was established based on the experiments. The results show that austenite grain grows in an exponential law with the increase of heating temperature, while approximately in a parabolic law with the increasing of holding time. According to the Sellars model of phenomenological theory and the nonlinear regression method, the austenite grain size growth model of 42CrMo steel during heating is obtained. The austenite grain size of 42CrMo steel during heating is predicted by FEM simulation based on the model. The prediction result agrees well with the experimental result.

• 出版日期2015
• 单位合肥工业大学