Laser-cladding repairing process for pump shaft of nuclear power station

Abstract

The invention discloses a laser-cladding repairing process for a pump shaft of a nuclear power station. The laser-cladding repairing process comprises the following steps: S1, determining the bending part of the pump shaft; S2, using high-energy laser to scan convex points at the bending part of the pump shaft, monitoring the pointer of a dial indicator and stopping laser scanning when the curvature of the pump shaft starts to stretch to the original position; S3, determining whether the pump shaft needs to be straightened, and removing a fatigue layer on the part, requiring treatment, on the pump shaft; S4, after determining that the damage surface of the pump shaft is free of abrasion scars, wiping off a flaw detection agent, repeatedly wiping off the flaw detection agent, which is not wiped off, with acetone, and cleaning the surface of the pump shaft by the low-power mode of a laser; and S5, performing laser cladding of the pump shaft till completion of cladding. According to the process, the pump shaft is straightened by laser and repaired by laser cladding, the operation is simple, the controllability of the implementation process is greatly improved in comparison with a method in the prior art, and the laser cladding material and substrate binding force of laser cladding is better than that of a traditional method.

Description

technical field [0001] The invention relates to a laser cladding repair process for a pump shaft of a nuclear power plant. Background technique [0002] The development of the nuclear industry and the strictness of nuclear industry standards have largely restricted the use of various accessories, so the life of accessories is the most important thing in nuclear power generation. If the operating equipment is shut down, it means power loss and economic loss. The pump shaft is As the most important consumable parts used in nuclear power generation, it is generally necessary to ensure that the generator set does not stop for more than ten years, so it is necessary to ensure the wear resistance and corrosion resistance of the pump shaft. And because these pump shafts are customized parts, the general manufacturers will not produce according to the order, so there will be no spare parts supply, so the pumps of nuclear power plants, except for the pump shaft damage, other parts ar...

AI Technical Summary

Problems solved by technology

[0005] (2) The wear is mostly caused by the bending of the shaft. In addition, the wear caused by the loose inner ring of the bearing or the damage of the bearing often occurs on the shaft diameter of the bearing.

The disadvantage is that the actual operation is very troublesome