A method of repairing parts with laser directional solidification technology

Abstract

The invention is a method for repairing parts by laser directional solidification technology. In order to overcome the deficiency in the prior art that the columnar crystal or single crystal structure in the repaired area is consistent with the original part structure, the present invention slices and processes the three-dimensional information of the part to be repaired into a series of two-dimensional plane data information, The CNC machine tool scans according to the scanning trajectory determined by the two-dimensional plane data. The laser beam forms a laser molten pool in the repair area of ​​the part. Covering and stacking layer by layer, so as to realize the repair of parts by using epitaxial laser metal forming method. By adopting the technical solution of the present invention, a directionally solidified columnar crystal or single crystal repair layer can be obtained in the repair area, which is epitaxially grown from the original part tissue, which ensures the integrity and orientation consistency of the repair layer and the matrix grains, and has good applicability .

Description

A method of repairing parts with laser directional solidification technology (1) Technical field: The invention is a method for directional solidification and repair of single crystal components in the industrial field. (two) background technology: The repair of parts is an important topic in the industrial field. Appropriate parts repair technology can save production costs and generate considerable economic benefits. At present, the commonly used method of repairing metal parts is TIG welding (tungsten argon arc welding of inert gas), but this method is often prone to welding hot cracks under normal conditions. In recent years, with the development of laser technology, people have gradually applied laser cladding technology to the repair of parts. This is mainly due to the fact that the laser cladding coating can obtain a fine and dense internal structure, no defects and a surface structure with excellent performance without changing the base material of the part. Ther...

AI Technical Summary

Problems solved by technology

In order to overcome the shortcomings in the existing technology that the repaired area cannot be realized to have a columnar crystal or single crystal struct

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