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研究了第三代高强度高塑性低碳中锰冷轧TRIP钢的退火工艺对性能的影响和残留奥氏体稳定性。结果表明:临界区退火温度和保温时间对钢的力学性能具有显著影响,退火温度为590℃,保温时间为18 h时,实验用钢6.72%Mn-TRIP可获得815 MPa的抗拉强度和38%的断后伸长率,强塑积>30 GPa·%;临界区保温时,C、Mn元素由马氏体配分到新形成的残留奥氏体,使残留奥氏体稳定在室温。大量残留奥氏体以及配分之后的马氏体和发生再结晶的铁素体,使材料具有良好的塑性和强度。
The effect of annealing process on the properties and retained austenite of the third generation high strength and low plasticity medium manganese cold rolled TRIP steel was studied. The results show that the critical annealing temperature and holding time have a significant effect on the mechanical properties of the steel. When the annealing temperature is 590 ℃ and the holding time is 18 h, the tensile strength of 815 MPa and 6.72% Mn-TRIP are 38% % Elongation at break, strong plastic product> 30GPa ·%; C, Mn elemental division from the martensite to the newly formed retained austenite, the retained austenite stable at room temperature. A large number of retained austenite and the division after the martensite and recrystallization of ferrite, the material has good plasticity and strength.