CAR BOGIE STEP BEARING RECONDITIONING METHOD Russian patent published in 2002 - IPC

FIELD: railway transport; repair of worn-out parts. SUBSTANCE: surfacing of support surface is started from preliminarily stopped center pin hole. Then surfacing of thrust surface is carried out. Surfacing is made with welding wire whose components are chosen depending on components of metal used in manufacture of pivot block. Flux used for surfacing contains the following components, mass%: silicon oxide 41-47; manganese oxide 34- 38; calcium oxide less than 10; copper oxide less than 7; aluminum oxide less than 6; sulfur and phosphorus oxide less than 0.12. EFFECT: provision of quality deposited metal layer as to chemical composition, structure and hardness. 2 dwg