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通过一步淬火配分热处理工艺参数的变化研究了钢的组织性能的变化规律。结果表明,不同淬火温度下,抗拉强度随配分温度的升高而逐步降低,屈服强度则随配分温度升高而下降。在250℃配分后得到最优的强韧性,抗拉强度达到1655 MPa,伸长率16.8%,强塑积为27804 MPa.%。另外在250℃配分后得到最高的残余奥氏体含量和奥氏体中较低的碳含量,在变形过程中发生马氏体相变,即TRIP效应,使塑性提高。
The variation regularity of the microstructure and properties of the steel was studied by the change of the technological parameters of one-step quenching heat treatment. The results show that under different quenching temperature, the tensile strength gradually decreases with the increase of the partition temperature, and the yield strength decreases with the increase of the partitioning temperature. The optimum strength and toughness were obtained after blending at 250 ℃. The tensile strength reached 1655 MPa, elongation 16.8%, and plastic modulus 27804 MPa%. In addition, the highest retained austenite content and the lower carbon content in austenite were obtained after the components were distributed at 250 ℃, and the martensite transformation (TRIP effect) occurred during the deformation process to improve the ductility.