A device and method for reducing laser hardened soft band

Abstract

The invention discloses a device and method of reducing a laser quenching soft belt, and belongs to the technical field of laser quenching device and technology. The device of reducing the laser quenching soft belt comprises a spraying device and a coating conveying pipe connected with the spraying device; the outlet of the coating conveying pipe is pointed at the edge of a laser irradiation areaon the workpiece surface; and a flow valve is arranged on the coating conveying pipe. According to the method of reducing the laser quenching soft belt, light absorbing paint is sprayed to the presetoverlapping area of the workpiece surface to increase the light absorption rate of the preset overlapping area. By producing a coating spraying device, absorbable coating is accurately sprayed on thepreset overlapping area of the laser located on the workpiece surface to improve the absorption properties of the preset overlapping area, the soft belt width of the overlapping area is reduced, thereby obtaining a more uniform laser enhanced surface. The device is simple in structure, reasonable in setting, and the method is easy to operate; and the hardness of the workpiece after the laser quenching can be more uniform, and the quality of the laser quenched workpiece is improved.

Description

technical field [0001] The invention relates to a device and method for reducing laser hardening soft bands, and belongs to the technical field of laser hardening devices and processes. Background technique [0002] Laser quenching is a quenching technology that uses a laser to heat the surface of a material above the phase transition point. As the material itself cools, austenite transforms into martensite, thereby hardening the surface of the material. The heating and cooling speed of laser quenching is very fast, the process cycle is short, and no external quenching medium is required. During the quenching process, the deformation of the workpiece is small, and the working environment is clean. The quenched workpiece has a uniform hardened layer and high hardness. However, in the quenching process, due to the own factors of laser quenching and strengthening, there is an overlapping area between each laser, and there is a soft zone with a certain width in the overlapping...

AI Technical Summary

Problems solved by technology

However, in the quenching process, due to the own factors of laser quenching and strengthening, there is an overlapping area between each laser, and there is a soft zone with a certain width in the overlapping area, which directly affects the entire laser quenching and strengthening effect.

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