Renovation Repair for Variable pitch hub
The components are repaired in strict accordance with process operation instruction and process flow. After being repaired, the components meet technical requirements of customers and accord with repair standards of corresponding industries. Take repaired bend axle for example, the micro-hardness is HRC50~55; the clad layer shear strength is more than 35-45Kgf/mm2; the abrasive resistance is equal to or more than the high-frequency quenching value of No.45 steel; there is no visible connection line between the clad layer and the matrix; the clad layer, with the one-time cladding thickness of 4mm (in the diametrical direction), has firm and smooth surface with fine texture after being processed, has table property at the temperature of below 300℃, is firm and does not peel off.
After being repaired, components such as engine bodies, connectingrods, pistons, cylinder heads, camshafts, tail shaft white steel jackets and bearing bushes meet the repair technical standard requirements of CCS and the Ministry of Railways in terms of quality and are checked and accepted by accepters specified by CCS and The Ministry of Railways.