Abstract
The austenite grain growth behavior of Q1030 steel was studied under different heating conditions. The austenite grain size increases with the heating temperature and holding time increasing. Austenite grains grow in an exponential manner with rising heating temperature and in a parabolic manner with prolonging holding time. A mathematical model for describing the austenite grain growth behavior of Q1030 steel was obtained on the basis of experimental results using regression analysis. When the heating temperatures lie between 1000 and 1100°C at a certain holding time, abnormal grain growth appears, which causes mixed grains in Q1030 steel.
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