A method for characterization of laser cladding layer and molten pool morphology

Abstract

The invention provides a laser cladding layer and molten pool morphology presentation method, belongs to the technical field of laser cladding remanufacture, and relates to the laser cladding layer and molten pool morphology presentation method. According to the method, firstly the cladding substrate sample is cut by a wire cutting machine along the direction perpendicular to the scanning path ofthe cladding layer; then the cut substrate sample is polished on sandpaper with different particle size according to the ascending order of the particle size based on the metallographic sample preparation method; then the polished substrate sample is photographed at the depth of field; then the morphology and the profile of the cladding layer and the molten pool in the ultra-depth-of-field photograph are drawn by arc extension with different curvature radii and the curvature radii of each arc are recorded; and finally the width and the height of the whole morphology and the profile and the inclined angle between the cladding layer and the molten pool are measured. The method can quickly and accurately present the morphology and the profile of the cladding layer and the molten pool.

Description

technical field [0001] The invention belongs to the technical field of laser cladding and remanufacturing, and relates to a laser cladding layer and a method for characterizing the morphology of a molten pool. Background technique [0002] Laser cladding technology is an advanced remanufacturing technology. Due to its many advantages such as small heat-affected zone, small workpiece deformation and high bonding strength, it is widely used in the field of rapid prototyping and repair of parts. However, in the process of rapid prototyping and repairing of parts, the process parameters of laser cladding have a crucial influence on the quality of forming and repairing, and the geometry of the cladding layer has a great influence on the lap rate and Z-axis of laser cladding. Process parameters such as lifting amount have a direct impact, so the characterization of laser cladding layer and molten pool morphology plays a vital role in the rapid prototyping and repair quality of par...

AI Technical Summary

Problems solved by technology

However, neither of these two methods can fully characterize the morphology of the cladding layer and the molten pool, especially when performing laser cladding on an inclined base surface, due to the influence of gravity on the tension of the cladding layer and molten pool, the cladding The contours of the cladding layer and molten pool are no longer symmetrical, so the original characterization method for cladding layer and molten pool morphology cannot express the influence of gravity on the cladding layer and molten pool morphology, and thus cannot study the effect of gravity on zero Rapid prototyping of components and impact on repair quality

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