Laser compound strengthening technology

Abstract

The invention provides a laser compound strengthening technology, which comprises the following steps of (1) carrying out femtosecond laser micro machining on a blade area of a hard alloy cutter, so as to obtain pits arranged in certain sequence; (2) carrying out laser shock peening in the blade area of the hard alloy cutter; (3) coating on the surface of the cutter after laser shock peening; and (4) carrying out laser shock wave microtexture forming process on the blade area of the coated hard alloy cutter, so as to obtain a laser compound strengthening model. The laser compound strengthening technology comprises four steps, namely, laser micro machining, laser chock peening, surface coating, and the laser shock wave microtexture. According to the laser compound strengthening technology, residual compressive stress, infiltration characteristic, heat transmission, cooling and lubricating conditions of the blade area can be obviously improved, built-up edges and burrs are reduced, and nickel base material is prevented from being attached to the surface of the cutter, so that the service life of the cutter is prolonged, and the stability of the manufacture quality is improved.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a process for laser composite strengthening. Background technique [0002] Cemented carbide tools have a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance, so they can be widely used. In order to further improve the performance of the tool, coating treatment is generally carried out on the surface of the tool. However, when machining nickel-based alloys, the working conditions of the tool are complex, the conditions of surface lubrication, wear reduction, and heat transfer are harsh, and the nickel-based alloys have great resistance to high-temperature deformation, and it is difficult to remove and break chips; the phenomenon of work hardening is serious; it is particularly easy to " Sticking to the knife”, the accumulation of tumors and scales are serious, and coating damage, adhesive wear...

AI Technical Summary

Problems solved by technology

[0002] Cemented carbide tools have a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance, so they can be widely used. In order to further improve the performance of the tool, coating treatment is generally carried out on the surface of the tool. However, when machining nickel-based alloys, the working conditions of the tool are complex, the conditions of surface lubrication, wear reduction, and heat transfer are harsh, and the nickel-based alloys have great resistance to high-temperature deformation, and it is difficult to remove and break chips; the phenomenon of work hardening is serious; it is particularly easy to " Sticking to the knife", the accumulation of tumors and scales is serious, and it is prone to coating damage, adhesive wear, chemical diffusion wear, and boundary wear, thereby reducing the processing quality of the workpiece

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