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Induction stress relieving is a process by which stress from the metal is removed by localized heating without weakening or softening it. Induction shrink fitting and stress relieving equipment is used by many industries. Railroads use it in the production of gearboxes, wheels, transmissions.
Method for improving contact wear resistance of rail by adjusting pearlite interlamellar spacing
The application discloses a method for improving the contact wear resistance of a rail by refining the pearlite lamellar spacing to 260-320 nm through a staged temperature control isothermal heat treatment process combined with micro stress induction, thereby significantly improving the wear resistance and fatigue resistance while ensuring high strength. The rolling contact wear test results under a load of 20-40 N show that the Brinell hardness of the rail sample prepared by the process is increased by about 16%, the average friction coefficient is reduced by 9.8%, the wear volume is reduced by about 24.5%, and the crack initiation life is increased by about 1.4 times. The method has stable process, accurate control, is suitable for batch manufacturing of U75V heavy load and high speed rail, and has a wide industrial application prospect.
Owner:INNER MONGOLIA BAOTOU STEEL UNION