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一、前言应用离子氮化法可以形成四种氮化层:普通氮化层(ε+γ′+扩散层)、软氮化层(ε+扩散层)、韧性氮化层(γ′+扩散层)和高韧性氮化层(只有扩散层而无化合层),究竟哪一种氮化层组织最耐磨?有没有什么共同规律?这是大家都很关心的问题。但直到目前为止,还没有看到这方面的系统的数据和资料。本文采用两段法获得了40Cr、35CrMo和38CrMoAlA钢的韧性氮化层和高韧性氮化层,比较了普通氮化层、韧性氮化层和高韧性氮化层的磨料磨损抗力,并对磨料磨损的影响因素进行了分析,得出一些很有意义的结论。二、试验方法和结果 1.试验条件
I. INTRODUCTION Four kinds of nitride layers can be formed by ion nitriding: normal nitride layer (ε + γ ’+ diffusion layer), soft nitride layer (ε + diffusion layer), ductile nitride layer (γ’ + diffusion Layer) and high toughness nitride layer (only the diffusion layer without the compound layer), what kind of nitride layer structure is the most wear-resistant? Is there any common law? This is everyone’s concern. But so far, no systematic data and information have been seen in this regard. In this paper, ductile nitriding layer and high toughness nitridizing layer of 40Cr, 35CrMo and 38CrMoAlA steels were obtained by two-stage method. Abrasive wear resistance of common nitride layer, ductile nitride layer and high-toughness nitride layer were compared. The influencing factors of wear are analyzed, and some meaningful conclusions are drawn. Second, test methods and results 1. Test conditions