Open AccessEffect of non-metallic inclusions on fatigue life of high-speed railway bearings
Author(s) -
Can Yang,
Gang Zhang,
Yong Wu Wang,
Zhen Qiang Zhang,
Zhong Ren
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/892/1/012037
Subject(s) - raceway , bearing (navigation) , contact mechanics , materials science , stress (linguistics) , structural engineering , contact area , non metallic inclusions , metallurgy , engineering , composite material , lubrication , finite element method , computer science , linguistics , philosophy , artificial intelligence
In the process of smelting and manufacturing of high-speed bearing steel, non-metallic inclusions are always inevitable, which destroy the continuity of the metal matrix and decrease the fatigue life of high-speed railway bearings seriously. Under the condition of obtaining the position and the number of the maximum contact load of the high-speed railway bearings, according to the Hertz contact theory, the maximum contact stress σ max between the roller and the raceway of the high-speed railway bearings and the half-width b of the contact surface is calculated, and then the stress distribution equation of the contact surface is obtained. According to the basic theory of fatigue life, the local stress-strain method was used to analyse the influence of the distance, depth and quantity between the inclusions contained in the raceway of the outer ring on the contact surface stress and the fatigue life of the high-speed railway bearings. Quantitative relationship between the influence of non-metallic inclusions and the contact fatigue life of high-speed railway bearings was determined, which provided scientific bases in the smelting process of high-speed railway bearing steel.