研究了不同工艺处理时C、Mn配分对0.17C-1.83Mn-1.58Si钢组织性能和残留奥氏体的影响。结果表明,钢经不同工艺处理后组织都为马氏体,其中DQ工艺处理后马氏体部分呈块状形态,Q-P工艺得到的马氏体板条较I-P-Q工艺更细长,I-Q-P工艺得到“板条束”马氏体形貌;钢经I-P-Q工艺处理后伸长率较DQ工艺提高了5.7%,残留奥氏体量为3.7%;钢经Q-P工艺处理后伸长率达到22.8%,残留奥氏体量提高到6.8%;经I-Q-P工艺处理钢具有最优异的力学性能,强塑积达到31 800 MPa·%,残留奥氏体量达到最大的10.6%;Mn配分是在奥氏体化之前提高奥氏体稳定性,C配分增塑效果高于Mn配分,C、Mn配分综合作用使钢具有最优的组织性能。 The effects of C, Mn fractionation on the microstructure and retained austenite of 0.17C-1.83Mn-1.58Si steel were studied under different processing conditions. The results show that the microstructure of the steel is martensite after being treated by different processes. Among them, the martensite part of the DQ process is massive, the martensite slab obtained by the QP process is more slender than the IPQ process, “Slab bundle” martensite morphology; steel after IPQ process elongation than the DQ process increased by 5.7%, the amount of retained austenite was 3.7%; After the steel by the QP process elongation of 22.8% , The amount of retained austenite increased to 6.8%; the mechanical properties of the steel treated by the IQP process had the most excellent mechanical properties, the strong plastic product reached 31 800 MPa ·% and the amount of retained austenite reached the maximum 10.6% Prior to the body to improve the stability of austenite, C with plasticizing effect is higher than the distribution of Mn, C, Mn with the combined effect of the steel has the best organizational performance.