Laser cladding repairing method for end tooth wear or cracks of general high speed pump gear shafts

Abstract

The invention belongs to the field of repairing of high speed pump shafts for petrochemical industry and relates to a laser cladding repairing method for end tooth wear or cracks of general high speed pump gear shafts. The method aims at repairing of parts with wear and cracks on end teeth in long-time running process and comprises the steps of firstly removing damaged end teeth and remanufacturing new end teeth, carrying out hot charging by utilizing the part size change caused by temperature difference, selecting stainless steel powder and wear-resistant Co-based alloy powder which have mechanical properties similar to those of a base material, carrying out cladding by adopting laser cladding process parameters, removing residual stress in cladded parts through a hammering method, finally recovering the parts to a design size through a precise mechanical processing method, thereby recovering the operational performance of the high speed pump gear shafts. The method disclosed by the invention has the advantages that in the laser cladding repairing process of the high speed gear pump shafts, the base material is maintained at a low temperature all the time during cladding and the part deformation rate is almost zero; and the obtained cladding layer is metallurgically combined with a matrix, the automatic efficiency is high and the cost is low.

Description

technical field [0001] The invention belongs to the field of repairing special high-speed pump shafts in the petrochemical industry, and relates to a method for repairing gear shaft end teeth wear or cracks by laser cladding of a general high-speed pump. Background technique [0002] my country's petrochemical industry has developed greatly in recent years. Most of the petrochemical industry uses imported equipment with high value. The life of parts is very important to the production of the petrochemical industry. If the equipment is shut down due to the damage of the parts, it means a huge economic loss, and because the order cycle of imported equipment is long, it will seriously affect the production of the enterprise. High-speed pumps are general-purpose equipment in the petrochemical industry, and the pump shaft is the most easily damaged part. To ensure that the operating unit does not stop during an overhaul period, it is necessary to ensure that the high-speed pump s...

AI Technical Summary

Problems solved by technology

Because these high-speed pump shafts are imported equipment components, the procurement cycle is extremely long, and domestic manufacturers cannot produce high-speed pump shafts that fully meet the standards, so the imported high-speed pump shafts are damaged, and it usually takes a long time to order to get a replacement. Parts, which greatly affect the production and economic benefits of the enterprise, or replace the entire set of high-speed pump equipment, need to pay a high price

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