Abstract: The production process flowsheet of tested steel NM360 (/%: 0.17C, 0.38Si, 1.28Mn, 0.014P, 0.005S, 0.23Cr, 0.14Mo, 0.02Ti, 0.04Al) 30mm plate is 90t EAF-LF-VD-180mmx1330mm slab casting-rolling to 30mm plate-quenching at 950°C and tempering at 350°C.With using the Gleeble-3500 thermal simulation testing machine, the deformation behavior of wear resistant steel NM360 at 900~1200°C with strain rate 0.1, 1 and 10s^-1 has been studied to define the thermal deformation equation and the hot working map of steel is established. Results show that the flow behavior of steel NM360 at thermal compressing deformation could be well described by the Zener-Hollomon parameter and the calculated dynamic activation energy is 305kJ/mol. With increasing temperature and decreasing strain rate, the efficiency of energy dissipation gradually increases；as at 1100°C with strain rate 0.1s^-1 , the efficiency of deformation energy dissipation is up to max value 0.34, The wear steel has better deformability at 1070~1170°C with strain rate 0.1~0.5s^-1. The production results show that with optimization process-180mm casting slab heating at (1200±20)°C , beginning rolling at (1050土10)°C , finishing rolling at (950±10)°C to 30mm plate, water cooling, tempering at 350~550°C for 1h, the NM360 steel HB hardness value is 368~385, yield strength is 830~920MPa, tensile strength is 1030~1120MPa and elongation is 10%~15% , it has better mechanical properties.

摘要： 试验用NM360钢（/%:0.17C,0.38Si,1.28Mn,0.014P,0.005S,0.23Cr,0.14Mo,0.02Ti,0.04Al）30mm厚板的生产工艺流程为90t EAF-LF-VD-180mm×1330mm坯连铸-轧制30mm板-950℃淬火,350℃回火。利用Gleeble-3500热模拟试验机研究了耐磨钢NM360在900~1200℃,应变速率为0.1、1、10s^-1下的变形行为,确定了NM360耐磨钢的热变形方程,建立了热加工图。结果表明,利用Zener-Hollomon参数可很好描述NM360钢热压缩变形时的流变特性,计算的动态再结晶激活能为305kJ/mol。随着温度升高以及应变速率降低,能量耗散效率逐渐升高;在1100℃,应变速率为0.1s^-1时,变形能量耗散效率达到最大值0.34。该耐磨钢在1070~1170℃,应变速率0.1~0.5s^-1时,具有较好的变形能力。通过优化工艺的生产结果表明,180mm铸坯（1200±20）℃加热,（1050±10）℃开轧,（950±10℃终轧成30mm板、水冷,350~550℃回火1h,NM360钢HB硬度值为368~385,屈服强度830~920MPa,抗拉强度1030~1120MPa,延伸率10%~15%,具有良好的力学性能。

关键词: NM360耐磨钢, 热压缩, 激活能, 热加工图