Laser quenching coating and method for machining corrugated roller by using same

Abstract

The invention discloses a laser quenching coating and a method for machining a corrugated roller by using the same. The laser quenching coating comprises the following raw materials in parts by weight: 30-60 parts of SiC, 7-12 parts of Cr2O3, 30-50 parts of bentonite, 6-10 parts of rosin and 200-300 parts of alcohol. The method comprises the following steps: dissolving the rosin in a proper amount of alcohol solution; putting SiC, Cr2O3 and the bentonite in a mixer, adding a rosin solution obtained by dissolution, then adding the remaining alcohol, and evenly mixing; uniformly spraying the mixture on the surface of the clean corrugated roller to be machined by using a spray gun; after the coating is dried, irradiating laser spot along the direction of the roller teeth of the corrugated roller for quenching; polishing the surface of the quenched corrugated roller; and plating hard chromium or spraying tungsten cobalt alloy on the tooth surface. The laser quenching coating is high in adhesion, and prevents the workpiece surface from being melted at high temperature. The corrugated roller machined by adopting the method is high in tooth surface hardness, deep in quenching penetration and long in service life, and the tooth surface has no crack.

Description

technical field [0001] The invention relates to a laser quenching coating and a laser quenching process for processing corrugated rolls by using the coating. Background technique [0002] Laser quenching means that when the laser irradiates the workpiece, the surface of the workpiece heats up rapidly. After the laser passes, the workpiece absorbs heat and dissipates heat rapidly by its own body to achieve the purpose of quenching. However, when the workpiece is directly irradiated with a laser, the surface of the workpiece will reflect light, and it will melt after a long time, which will not achieve the purpose of quenching. Therefore, it is necessary to spray paint on the surface of the workpiece. The requirements of the laser quenching coating are: first, high temperature resistance and rapid and uniform absorption of laser heat The second is high temperature resistance and moderate protection of the workpiece surface, so that it can avoid the melting of the workpiece sur...

AI Technical Summary

Problems solved by technology

The process is relatively mature, the operation is relatively simple, and the quenching penetration layer is deep; however, the workload of gear grinding increases, and it needs to be installed twice before and after the grinding; if the hardness of the tooth surface is too high for intermediate frequency quenching, it is prone to tooth surface cracks and tooth loss. , if the hardness of the tooth surface is too low, the wear resistance will be poor and the service life will be shortened, and the intermediate frequency quenching will cause the internal stress of the tile roller to be large and easy to deform

Re-repair can only be done by hard chrome plating or spraying tungsten-cobalt alloy after fine grinding, the hardness of the tooth surface will be reduced (because it cannot be quenched again to increase the hardness), and the service life will be greatly shortened, so generally it can only be repaired 1-2 times; when hard chrome plating will be due to hydrogen evolution Deep cracks will be formed on the tooth surface, and in severe cases, the teeth will be warped and the teeth will be lost, which will make the tile roller useless