摘要
The influence of soaking temperature on microstructure of high temperature multi-pass compression deformation for two low carbon steels(steel A:wC=0.032%and wMn=0.25%;steel B:wC=0.165%and wMn=0.38%)is studied on the thermal-mechanical simulator in order to rationalize the hot-rolling schedule of low-carbon steel and to promote the low-temperature heating technology.The results show that the microstructures of steel A are almost not affected by reducing soaking temperature,but the acicular ferrite forms in steel B when the soaking temperature is reduced from 1 200 to 1170℃,due to its smaller initial austenite grain size according to recrystallization kinetics theory.
The influence of soaking temperature on microstructure of high temperature multi-pass compression deformation for two low carbon steels （steel A： wc=0.032% and WMn=0.25%; steel B： wc=0.165%and WMn=0.38%） is studied on the thermal-mechanical simulator in order to rationalize the hot-rolling schedule of low-carbon steel and to promote the low-temperature heating technology. The results show that the microstructures of steel A are almost not affected by reducing soaking temperature, but the acicular ferrite forms in steel B when the soaking temperature is reduced from 1200 to 1170℃, due to its smaller initial austenite grain size accordingto recrystallization kinetics theory.
基金
the National Natural Science Foundation of China(Nos.50971137 and 50934011)
