Laser repairing and strengthening composite treating method for damage cutter of shearing equipment

Abstract

The invention relates to a laser repairing and strengthening composite treating method for a damage cutter of shearing equipment, and relates to the technical field of machine manufacturing and material treating machining application. The composite treating method includes the steps that surface nondestructive testing is carried out on a cutter of the shearing equipment firstly; then laser fusion repairing is carried out on a defect part of the damage cutter, and meanwhile helium is led in to protect a laser fusion part; and polishing and purifying are carried out on the laser fusion part of the cutter after the laser fusion repairing is carried out, Ni60 alloy powder is pre-arranged on the surface of the cutter, a base body surface layer of the cutter is heated and fused through high-energy laser beams, rapid solidification is carried out after mixing is carried out, and therefore a new surface alloy layer is formed on the laser fusion part of the cutter. By means of the laser repairing and strengthening composite treating method, defects on the surface of the damage cutter can be rapidly repaired, the mechanical property like hardness is improved, continuous operation can be achieved, and the service life of the cutter is prolonged.

Description

Technical field: [0001] The invention relates to the technical field of mechanical manufacturing and material processing and processing applications; in particular, it relates to a composite processing method for laser repair and strengthening of damaged cutting tools of shearing equipment. Background technique: [0002] Laser melting (LaserRemelting) is also called laser glazing. It uses a high-energy laser beam to continuously scan the metal surface to rapidly melt the thin layer on the surface, and under the action of a very high temperature gradient, the 5 ~10 7 The speed of ℃ / s is rapidly cooled and solidified, so that a special microstructure is produced on the surface of the material. Laser melting requires high laser energy and fast cooling; surface cracks and defects can be welded through the melting process, surface composition segregation is reduced, and metastable or even amorphous phases such as highly supersaturated solid solutions are formed. The fused layer...

AI Technical Summary

Problems solved by technology

However, using surface repair materials to repair under strong laser light, on the one hand, the bonding strength between the repair materials and the base material is low, and may fall off in subsequent use, and even cause secondary damage. On the other hand, this method affects the hardness of the repaired materials. Small impact, basically maintain the hardness of raw materials

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