Abstract—

This article discusses the experimental results of wear resistance of machine parts made of alloyed steels, with nitrided layers, with structures formed with and without nitride mesh. It has been demonstrated that the nitrided layers with traditional structure under certain conditions of friction and wear do not completely exhibit their potentials of wear resistance as a consequence of disintegration of their fragments due to weakened intergranular boundaries in nitrided layer resulting from their oversaturation with nitrogen. The models of formation of structures of nitrided layers are schematically illustrated including their behavior during friction and wear. It has been mentioned that the use of high energy ion implantation at an ion energy of about 18–26 keV due to the occurrence of the long-range effect provides formation of radiation defects of a crystalline structure at a depth comparable with the thickness of a nitrided layer allowing it to significantly intensify nitrogen diffusion as well as to block grain boundaries, which inhibit diffusion processes in them. It has been determined that while intensive plastic deformation of the surface layer improves diffusion intensity, still, it can be efficiently applied only in combination with high energy ion implantation. The results of comparative wear tests are exemplified by screw pump rotors operating under conditions of intensive friction wear. It has been demonstrated that the absence of nitride mesh in a nitrided layer improves wear resistance of the nitrided layer by about 3–4 times.

中文翻译：

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高强度高能方法提高合金钢机械零件渗氮层耐磨性

摘要—

本文讨论了由合金钢制成的机械零件的耐磨性实验结果，这些零件具有氮化层，其结构形成有和没有氮化网。已经证明，具有传统结构的渗氮层在一定的摩擦和磨损条件下并没有完全发挥其耐磨潜力，这是由于渗氮层中的晶界因氮过饱和而变弱而导致其碎片崩解的结果。氮化层结构的形成模型被示意性地说明，包括它们在摩擦和磨损期间的行为。已经提到，由于长程效应的发生，在约 18-26 keV 的离子能量下使用高能离子注入提供了在与厚度相当的深度处形成晶体结构的辐射缺陷。氮化层使其能够显着加强氮扩散并阻挡晶界，从而抑制晶界中的扩散过程。已经确定，虽然表面层的强烈塑性变形提高了扩散强度，但它仍然只能与高能离子注入结合才能有效应用。比较磨损试验的结果以在强烈摩擦磨损条件下运行的螺杆泵转子为例。