High-efficient wire material laser cladding method

Abstract

The invention provides a wire material laser cladding method. The wire material laser cladding method comprises the following steps that one electrode of a wire material heating device is connected with a workpiece, the other electrode of the wire material heating device is connected with a conductive nozzle, the wire material penetrates through the conductive nozzle and then makes contact with the surface of the workpiece, a laser beam and the wire material are placed in a certain angle with the surface of the workpiece respectively, the wire material heating device is started, the wire material is preheated to a certain temperature, a laser is started, and a laser beam generated by the laser is focused on wire material on the surface the workpiece, the laser energy is absorbed by the wire material, then a molten pool is instantly formed on the surface of the workpiece, the melting pool is controlled to move on the surface of the workpiece according to a preset path and a preset speed, and the laser cladding is completed. According to the method, the initial temperature and the cladding linear speed of the wire material are increased, the temperature of the wire material is increased to be close to the melting point before the wire material enters the laser beam, the wire material can melt to form a molten pool on the surface of the workpiece only by relatively small laser energy and relatively short irradiation time of the laser beam, and the wire cladding efficiency and quality are obviously improved, therefore the method has a wide popularization and application prospect.

Description

technical field

[0001] The invention relates to a wire laser cladding method, in particular to a wire laser cladding method for increasing the initial temperature of the wire and the cladding line speed, and belongs to the field of advanced manufacturing technology. Background technique

[0002] As an advanced manufacturing technology featuring high precision, high performance, low heat-affected zone, and low dilution rate, laser cladding technology is widely used in the preparation of modified coatings on the surface of metal parts, surface defect repair, and metal additive manufacturing.

[0003] Laser cladding technology can be divided into two categories: metal powder laser cladding and metal wire laser cladding according to the state of cladding materials. Metal wire laser cladding uses metal wire as the cladding material, uses high-energy laser beams as the energy source, and melts, solidifies and deposits the metal wire and the workpiece substrate at the same time acc...

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