Railway vehicle axle repair process
A technology for railway vehicles and axles, applied in metal material coating process, coating and other directions, can solve problems such as environmental hazards of abandoned axles, high axle replacement costs, wheel seat cracks and unloading grooves, etc., to achieve environmental friendliness and eliminate residual stress. , the effect of reducing the harm to the environment
Inactive Publication Date: 2015-04-01
SOUTHWEST JIAOTONG UNIV
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The invention discloses a railway vehicle axle repair process. The process comprises the steps of pretreatment, laser cladding, residual stress relaxation and machining, wherein in the laser cladding step, the adopted metal powder comprises, by mass, 0.1-0.25% of carbon, 17.5-28% of chromium, 10.5-16% of nickel, 0-0.65% of boron, 0.12-1.0% silicon, 0-4.5% of molybdenum, 0-0.8% of manganese and the balance being iron. A vehicle axle repaired through the process is small in microstructure, free of the defects such as air holes, slag inclusion and cracks and capable of meeting the requirement for use performance; the service life of the repaired vehicle axle reaches or exceeds that of a new axle. The railway vehicle axle repair process has the advantages that operation is easy, the controllability is good, the damaged vehicle axle can be repaired quickly in a short time, the cost for replacement of the damaged axle with the new axle is lowered, the use cost of the vehicle axle is lowered, harm of the discarded vehicle axle to the environment is reduced, and environmental friendliness is achieved.
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