Restoration of the geometry and properties of rollers of the lower section of bearings by surfacing

Abstract

The development and application of the technology of reconditioning surfacing of the rollers of the bottom section of bearings with a high degree of wear of the working surface (up to 15 mm) are described. The main task was to ensure the required wear resistance of the deposited metal and HV10 hardness not lower than 500 mm². This was achieved by the method of electric arc-mechanized surfacing with a consumable electrode wire with a solid cross section and a mixture of fluxes FKN-6 and OK 10.71 resulting in the required degree of alloying of the deposited metal and the required mechanical properties. The proposed technology is used for surfacing an experimental batch of rollers and has been tested in the actual production conditions.

Keywords::

• electric arc surfacing
• melted electrode wire
• alloying flux
• structure
• phase transformations
• hardness
• wear resistance