Study Of Continuous Cooling After Austenite Deformation Of Low Carbon Bainitic Steels

Low carbon bainitic steel is a new kind of structural steel for its excellent low-temperature impact toughness and welding property. Many material research methods such as Physical simulation, nanoindentation technique, metallographic analysis, mechanical property tests, connected with theoretical analyze, have been used to study the transformation of three kinds of low carbon bainitic steel with different carbon contents under conditions such as prior compressive deformation at non-recrystallized temperature of austenite, relaxation after austenite deformation, different cooling rates, and different interrupt temperature. Microstructures and mechanical properties had also been analogized to summarize the evolvement of different microstructures in low carbon bainitic steels. The primary contents and conclusions are as follows:(1) With the increase of the amount of deformation, the bainitic transformation-starting temperature(Bs) fell down non-linearly, while the initial transformation rate was elevated. The overall volume fractions of...