A STUDY OF HYDROGEN SATURATION OF MACHINE PART MATERIALS IN OPERATION PERIOD

It is not possible to study material wear processes without investigating multiple parameters that determine their energy state and specify their structural adaptability to dynamic impacts. Within a certain time period the balance between energy flows that are generated by friction gets upset. It causes irreversible changes in the properties of materials, which is specifically demonstrated by their ability to absorb hydrogen. Interaction between machine parts is accompanied by energy and structural transformations in metals. It results in an increase of hydrogen concentration in metal surface layers with intensive hydrogen release into the interaction zone. The authors of this paper suggest that the response of the processes running in the systems of interacting materials should be related with a redistribution of diffusion-mobile hydrogen concentration. The authors have demonstrated that there is a limit of loading machine parts materials and it corresponds to a drastic intensification of hydrogen diffusion in them, which well agrees with the theoretical principles of material structural adaptability. They have also justified a need in determining such limits for material combinations that are used in machine parts design. An important stage in the studies of the process of hydrogen saturation of machine part materials is to determine the temperature range together with the relevant time period of experimental studies devoted to measuring hydrogen concentration in metals. It has been found experimentally that hydrogen saturation runs differently in the investigated materials of machine parts during their operation time. The rate of hydrogen saturation considerably depends on operation modes. Main factors determining hydrogen redistribution are the intensity of distributed load affecting the surfaces of machine parts and their temperature.

узлы трения, материал, изнашивание, наводораживание, предел нагружения, смазочная среда, режимы взаимодействия, friction unit, material, wear, hydrogen saturation, loading limit, lubricating medium, interaction modes

1. Канарчук В.Е. Адаптация материалов к динамическим воздействиям. - Киев: Наукова думка, 1986. - 264 с.

2. Лукашев Е.А., Ставровский М.Е. К построению математических моделей технической диагностики узлов трения // Теоретические и прикладные проблемы сервиса. - 2004. - № 1 (10). - С. 10 - 19.

3. Методы трибохимических исследований / Е.А. Лукашев, М.Е. Ставровский, А.В. Олейник, С.Г. Емельянов, В.М. Юдин. - Курск, 2006. - 282 с.

4. Теоретические основы триботехнической диагностики / Е.А. Лукашев, М.Е. Ставровский, С.Г. Емельянов, А.В. Олейник. - Курск, 2009. - 151 с.

5. Трибохимия водородного износа / Е.А. Лукашев, М.Е. Ставровский, А.В. Олейник, В.М. Юдин, С.Г. Емельянов. - Курск, 2007. - 278 с.