RECOVERY METHOD OF WORN SURFACES

摘要

FIELD: metallurgy. ^ SUBSTANCE: after cleaning of worn surface up to clean metal it is implemented heating of protected section of worn surface of rails up to temperature 400-450C during 5-6 min. along the full its length and into both sides of section on value of technological envelope of metal, which is about 100 mm. It is implemented welding deposition by electroarc method at operating temperature not lower 350C in layers for complete depth of worn surface with excess of mid-of-tolerance of rail roll surface for value of allowance for mechanical operation. At reduction of working temperature it is implemented additional heating of fused section of worn surface of rail. Then it is implemented self-cooling and mechanical operation of recovered surface of rail rolling. ^ EFFECT: improving of recovery of worn surface of rail ensured by increasing of fatigue strength, excluding of microchipping of deposited metal from surface of rail rolling at continuous service.