A laser cladding repair method for multi-pass evenly lapped damaged parts with unequal width

Abstract

The invention relates to a multitrack even overlapping laser cladding repair method for unequal width damage parts. For metal damage parts with the damage groove widths being changed gradually, a contourgraph is used for scanning a changing curve of the damage groove widths first, reasonable laser cladding track numbers and laser spot overlapping rates are selected according to the change range of the groove widths and laser spot diameters, and other parameters are kept unchanged; by controlling the sizes of laser spots to be changed along with the change of the damage groove widths, the numbers of laser cladding fusing tracks at the positions of different widths of grooves are the same, and the overlapping rates of laser cladding at the positions of different widths of the grooves are the same. By the adoption of the method, multitrack even overlapping laser cladding repair can be conducted on the unequal width damage parts, and the defect that tissue and property distribution of the unequal width damage parts is uneven due to different laser cladding fusing track numbers and uneven overlapping is effectively overcome.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a method for repairing damaged parts with unequal widths by multi-track uniform overlapping laser cladding, and is especially suitable for repairing metal parts with uneven width of damaged grooves. Background technique [0002] Laser cladding is a high-quality, high-efficiency, energy-saving, and environmentally-friendly surface modification technology. By adding cladding materials to the surface of the substrate and using a high-energy-density laser beam to fuse it together with the thin layer on the surface of the substrate, Forming a material-added cladding layer combined with metallurgy on the surface of the base layer, which can significantly improve the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the base layer surface, so as to achieve the purpose of surface modification or repair. It meets the requirements for ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a method for repairing damaged parts with unequal widths by multi-channel uniform overlapping laser cladding. For damaged metal parts whose width of the damaged groove changes gradually, a profiler is used to scan the width of the damaged groove first. Change curve, according to the variation range of the groove width and laser spot diameter, select a reasonable number of laser cladding melt channels and spot overlap rate, keep other parameters unchanged, and control the laser spot size to change with the width of the damaged groove. The number of melting channels and the overlapping rate of laser cladding at different widths of the groove are the same; the invention realizes multi-channel uniform lapping laser cladding repair of unequal width damaged parts, and effectively improves the damage caused by unequal width damage due to laser melting. Defects such as uneven structure and performance distribution caused by different number of cladding passes and uneven lap joints

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