One of the modern and effective methods of hardening metals is nitriding in a glow discharge in ammonia or in an anhydrous medium (nitrogen + argon) - BATR. This paper presents the results of experimental studies comparing the results of tribological and physicochemical properties of hardened surfaces obtained by nitriding with autonomous and interconnected BATR modes. The complex of traditionally fixed values of operating parameters (temperature, composition of the gas mixture, pressure and saturation time) without taking into account energy characteristics (voltage, current density and specific discharge power) significantly reduces the technological capabilities of BATR to achieve the necessary physicochemical properties of metal surfaces specified by conditions exploitation. Taking into account the energy characteristics of BATR, a significant reduction in the energy consumption of the nitriding process is achieved. The energy levels of the main subprocesses are significantly different: the formation of nitrides occurs at low energies, surface sputtering occurs at high voltage values, and nitrogen diffusion occurs at increased current density values. In cases where the energy of the flow is insufficient, either a glow discharge may not occur at all, or with a lack of voltage, the nitride ball on the surface is not sprayed and it acts as a barrier that prevents the diffusion process into the inner layers of the metal, which leads to low physicochemical and, correspondingly, tribological indicators of nitrided balls. The quantitative ratio between them and the required operational properties of the metal, respectively, can be achieved only through an independent combination of the energy and operating characteristics of BATR
Досліджено вплив режимних (температура, склад та тиск газової суміші) і енергетичних характеристик (напруга, густина струму, питома потужність розряду) за безводневого азотування в тліючому розряді (БАТР) на структуру, фазовий склад азотованих шарів. Показано, що завдяки комбінації режимних та енергетичних параметрів БАТР можна досягнути фізико-хімічних показників азотованих шарів заданих умовами експлуатації. Ключові слова: безводневе азотування в тліючому розряді, фазовий склад, напруга, густина струму, питома потужність розряду.The influence of the regime (temperature, composition of a gas mixture and its pressure) and energy characteristics (voltage, current density, specific discharge power) under nonhydrogenated nitriding in a glow discharge (NHGD) on the structure, phase composition of the nitrided layers is investigated. It is shown that because of the combination of regime and energy parameters of the NHGD it is possible to reach the physical and chemical indicators for the nitrided layers assigned by the exploitation conditions.
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