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The influence of soaking temperature on microstructure of high temperature multi-pass compression deformation for two low carbon steels(steel A:w_C=0.032%and w_(Mn)=0.25%;steel B:w_C=0.165%and w_(Mn)=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: w_C = 0.032% and w_ (Mn) = 0.25%; steel B: w_C = 0.165% and w_ (Mn) 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 ° C, due to its smaller initial austenite grain size according to recrystallization kinetics theory.