title: ÐÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ ÑÑÑÑÐºÑÑÑÑ Ð¿Ð¾Ð´ÑÐ¸Ð¿Ð½Ð¸ÐºÐ¾Ð²ÑÑ ÑÑÐ°Ð»ÐµÐ¹ Ð² Ð·Ð¾Ð½Ðµ ÑÐ°Ð·ÑÑÑÐµÐ½Ð¸Ñ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Features of the structure of bearing steels in the fracture zone
Creators: name: ÐÑÑÑÐ¸Ð½, ÐÐ°Ð½Ð¸Ð»
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: Ð¿Ð¾Ð´ÑÐ¸Ð¿Ð½Ð¸ÐºÐ¸ ÐºÐ°ÑÐµÐ½Ð¸Ñ
Ð¿Ð¾Ð´ÑÐ¸Ð¿Ð½Ð¸ÐºÐ¾Ð²Ð°Ñ ÑÑÐ°Ð»Ñ
ÑÑÑÐ°Ð»Ð¾ÑÑÐ½Ð¾Ðµ ÑÐ°Ð·ÑÑÑÐµÐ½Ð¸Ðµ
Ð±ÐµÐ»ÑÐµ ÑÑÐµÑÐ¸Ð½Ñ
Ð±ÐµÐ»ÑÐ¹ ÑÐ»Ð¾Ð¹
Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ Ð¿Ð¾Ð´ÑÐ¸Ð¿Ð½Ð¸ÐºÐ¾Ð² ÐºÐ°ÑÐµÐ½Ð¸Ñ Ð² ÑÑÐ´Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ð¸
Ð¼ÐµÑ Ð°Ð½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ²Ð¾Ð¹ÑÑÐ²Ð°
Ð²ÑÐ½Ð¾ÑÐ»Ð¸Ð²Ð¾ÑÑÑ
Ð¼ÐµÑÐ°Ð»Ð»Ð¾Ð³ÑÐ°ÑÐ¸Ñ
bearing rolling
bearing steel
fatigue fracture
white cracks
white layer
use of rolling bearings in shipbuilding
mechanical properties
endurance
metallography

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description: The work carried out a metallographic analysis of the microstructure of fatigue cracks and nearby areas of samples of the destroyed outer ring of a rolling bearing operating on the axis of the propeller shaft of an azimuthal thruster installed on a cargo ship; the peculiarities of the precipitation of carbide inclusions in the zones of internal destruction are determined; the main regularities of changes in the chemical composition in the zones of internal destruction have been established; the relationship between the microstructure of the fracture zone and the mechanical properties of the metal in it is traced. The results obtained can be used for further research in this direction. Based on the results of the work, the following conclusions were made: if the operating conditions of the bearing are violated, leading to a dynamic load on its parts, cracks may form with a white layer, the structure of which is formed as a result of prolonged mutual friction of the crack faces; with an increase in temperature, as a result of mutual friction of the crack faces, diffusion of carbon from the forming white layer into the base metal occurs, as a result of which carbide inclusions are formed in the region near the white layer; diffusion of chromium and manganese occurs from the base metal into the area of the forming white layer; the metal of the white layer has increased fragility. Cracks with a white layer are more dangerous than normal cracks.