Abstract—The phase composition and the static and fatigue mechanical properties of austenitic–martensitic VNS9-Sh (23Kh15N5AM3-Sh) TRIP steel at studied at various stages of cold drawing, from a diameter of 2.4 mm to a diameter of 0.36 mm, which corresponds to an overall reduction (cumulative strain) of 31.5 and 86%, respectively. As the cumulative strain increases from 31.5 to 45%, the fraction of martensite in the material volume is found to increase from 15 to 20.4% at a comparable strength level (1800–1850 MPa), the yield strength increases, and the relative elongation decreases. At an identical phase composition (15–20.4% martensite in the volume and at most 14% at the surface) and a comparable tensile strength (1800–1850 MPa), the fatigue characteristics of a wire 0.95 mm in diameter are higher than those of a wire 2.4 mm in diameter.

摘要：研究了奥氏体-马氏体 VNS9-Sh (23Kh15N5AM3-Sh) TRIP 钢在冷拔各个阶段的相组成以及静态和疲劳力学性能，从直径 2.4 mm 到直径 0.36 mm，对应总体减少（累积应变）分别为 31.5% 和 86%。随着累积应变从 31.5% 增加到 45%，在相当的强度水平 (1800–1850 MPa) 下，材料体积中马氏体的分数从 15% 增加到 20.4%，屈服强度增加，相对伸长率下降。在相同的相组成（体积中马氏体含量为 15-20.4%，表面含量最多为 14%）和相当的拉伸强度（1800-1850 MPa）下，直径 0.95 mm 的钢丝的疲劳特性高于直径 2.4 毫米的金属丝。