Influence of Reheating Conditions on Austenite Grain Growth

摘要

The processes of reheating in the temperature range (T_(reheat)) from 950 to 1250℃ with the holding time (t_(hold)) from 600 to 3600 s on the material known as high-strength low-alloy (HSLA) steel were investigated. The abnormal grain growth caused by the dissolution of Nb(C_x,N_y) particles was observed after T_(reheat) reached 1150℃. The influence of T_(reheat) on average austenite grain size (AGS) was stronger than that of t_(hold). Two different models were applied for the description of average AGS on T_(reheat) and t_(hold).