The possibility of creation of new competitive materials providing long-term and reliable operation of base members of heavy lifting and conveying machines operating under conditions of intense wear and impact loads at normal and negative temperatures is investigated. A thermokinetic diagram of decomposition of supercooled austenite is plotted for the newly developed steel 16GNTRA sparingly alloyed with elements of the Mn – Ni – Ti – B system. The effect of different heat treatments on the microstructure and mechanical properties of the steel is studied by scanning and transmission electron microscopy. The suggested mode of heat treatment of rolled products from sparingly alloyed steel 16GNTRA provides a hardness of 380 HBW and cold resistance KCV ^{– 40} ≥ 21 J/cm².

研究了创造新的有竞争力的材料的可能性，该材料为在正常和负温度下剧烈磨损和冲击载荷条件下运行的重型起重和输送机器的基础构件提供长期和可靠的运行。为新开发的钢 16GNTRA 绘制了过冷奥氏体分解的热动力学图，该钢与 Mn - Ni - Ti - B 系统的元素少量合金化。通过扫描和透射电子显微镜研究了不同热处理对钢的显微组织和力学性能的影响。16GNTRA 低合金钢轧制产品的建议热处理模式提供 380 HBW的硬度和耐寒性KCV ^{– 40} ≥ 21 J/cm² .