利用扫描电镜、透射电镜、XRD和力学性能测试,研究含钒TRIP800钢板在等温时效过程中的组织和力学性能变化。结果表明,试验钢中残余奥氏体含量受到贝氏体等温处理温度的影响,当处理温度为370~410℃时,残余奥氏体含碳量随温度的升高而升高,但当温度高于410℃时,含量下降;当处理温度低于410℃时,试验钢的伸长率、强塑积和屈服强度在贝氏体随着温度的升高而上升,在410℃时力学性能达到最佳;钒元素的添加增加钢中碳化钒的析出量,提高钢的力学性能;通过和双相钢相比,TRIP钢均匀变形能力更好。 The microstructures and mechanical properties of the TRIP800 steel plate during isothermal aging were investigated by scanning electron microscopy, transmission electron microscopy, XRD and mechanical testing. The results show that the residual austenite content in the test steel is affected by the isothermal treatment temperature of the bainite. When the treatment temperature is 370-410 ℃, the carbon content of the retained austenite increases with the increase of the temperature. However, When the temperature is below 410 ℃, the content decreases; when the treatment temperature is lower than 410 ℃, the elongation, the ductility and the yield strength of the test steel increase with the increase of the temperature in the bainite. At 410 ℃, the mechanical properties To achieve the best; the addition of vanadium elements to increase the precipitation of vanadium carbide in steel to improve the mechanical properties of steel; TRIP steel by even better than the deformation of dual-phase steel.