EFFECTS OF HEATING RATE ON THE PHASE TRANSFORMATION TEMPERATURE OF AUSTENITE IN M STEEL SHEET

摘要

This paper, the full automatic transformation instrument has been used to study in detail the CCT (Continuous Cooling Transformation) curve and CHT (Continuous Heating Transformation) curve of Martensite steel during rapid heating conditions. The heating rate scope from 5°C/S to 200°C/S, experiments results show that with the heating rate increasing, AC_3 and AC_1 temperature has a rising trend, but AC_3 increased more obvious, when the heating speed is up to 200K/S, can improve the AC3 temperature of 42°C, while the AC_1 temperature increases only less than 20°C. The experiment of martensite steel CCT curves were determined and analyzed.