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马氏体时效钢(250级)多用于要求高的强度/重量比及良好韧性的场合。这种钢属于高强度钢,达到了常用工程合金所能获得的最高的强度与韧性的结合。表面处理可能是改善这种钢的耐磨性的有效途径。渗硼是使硼渗入金属或合金的表面从而形成金属硼化物的表面化学热处理工艺,既能提高工程零件的表面性能,又不影响基体性能,是一种具有良好发展前景的工艺方法。本文对马氏体时效钢(250级)进行了盐浴渗硼,获得了高硬度的表面层。这种钢经渗硼处理后,其耐磨性能比未经渗硼的有了明显的改善。
Martensitic aging steel (250) are used for demanding high strength / weight ratio and good toughness of the occasion. This type of steel is a high-strength steel that achieves the highest strength and toughness that can be achieved with commonly used engineering alloys. Surface treatment may be an effective way to improve the wear resistance of this steel. Boronizing is a surface chemical heat treatment process that causes boron to infiltrate into the surface of a metal or alloy to form a metal boride, thereby improving the surface properties of the engineered parts without affecting the performance of the substrate. This is a promising process. In this paper, martensite-aged steel (250 grade) was infiltrated by salt bath to obtain a high hardness surface layer. After this kind of steel is infiltrated by boron, its wear resistance is obviously improved than that without boronizing.