研究了新型准贝氏体钢渗碳特性及渗层磨损性能。结果表明,准贝氏体钢具有良好的渗碳特性,特别是具有优越的空冷淬硬性,渗碳层的耐磨性达到18Cr2Ni4WA钢的水平。磨料磨损机制为:二体磨损以微切削为主,三体磨损以应变疲劳为主。并阐述了准贝氏体钢在重型钎具方面的应用结果。 The carburizing properties and the wear resistance of the new quasi-bainitic steel were studied. The results show that quasi-bainitic steels have good carburizing properties, especially excellent air-cooling hardenability. The wear resistance of carburized layer reaches the level of 18Cr2Ni4WA steel. Abrasive wear mechanism: two-body wear to micro-cutting-based, three-body wear to strain fatigue-based. The application of quasi-bainitic steels in heavy-duty brazing tools is also described.