Improvement of Wear Resistance of a Nitrided Layer of Machine Parts Made of Alloyed Steels by High Intensity and High Energy Methods

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Friction and Wear Pub Date : 2023-03-13 DOI:10.3103/S1068366622060083

N. K. Krioni, A. A. Mingazheva, A. D. Mingazhev

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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.

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高强高能法提高合金钢机械零件氮化层耐磨性

摘要:本文讨论了含氮层、含氮网和不含氮网组织的合金钢机械零件的耐磨性试验结果。研究表明，传统结构的氮化层在一定的摩擦磨损条件下，由于氮化层的过饱和使其晶间边界变弱，导致其碎片崩解，不能完全发挥其耐磨性潜力。对氮化层结构的形成模式及其摩擦磨损行为进行了图解。已经提到，由于远程效应的发生，在离子能量约为18-26 keV的情况下使用高能离子注入，可以在与氮化层厚度相当的深度形成晶体结构的辐射缺陷，从而显著加强氮的扩散，并阻塞晶界，从而抑制其中的扩散过程。研究表明，虽然表层的强烈塑性变形提高了扩散强度，但只有与高能离子注入相结合才能有效地应用。以螺杆泵转子在剧烈摩擦磨损条件下运行为例，进行了对比磨损试验。结果表明，氮化层中不存在氮化物网状物可使氮化层的耐磨性提高约3-4倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.