本文研究了在两相区采用不同碳势对3Cr2W8V热作模具钢进行渗碳表面强化处理。获得了不出现网状碳化物的碳势范围和具有较高硬度和耐磨性的,含大量粒状碳化物呈弥散分布的渗层。装机试验表明,与未经渗碳的模具相比,后者寿命有较大程度的提高。作者还从热力学角度,解释了渗碳过程。 In this paper, 3Cr2W8V hot work die steel was carburized and surface strengthened with different carbon potential in two-phase region. The carburization potential of the mesh carbides and the diffusion layer with a large amount of granular carbides dispersed therein were obtained with high hardness and wear resistance. Installed test shows that compared with the mold without carburizing, the latter has a greater degree of life expectancy. The author also explained the carburization process from the thermodynamic point of view.