Broadband laser cladding molten pool contour curve and modeling method thereof

Abstract

The invention relates to a broadband laser cladding molten pool contour curve and a modeling method thereof. The molten pool contour curve equation is as follows: (y-Wm / 2) / 2*W0=+ / -(x / Lm)*(1-x / Lm)<j>, 0<=x<=Lm. An XOY coordinate system is a Descartes coordinate system built with the center point of the front edge of the molten pool as the origin O and the cladding scanning direction as the negative direction of the x axis. In the equation, y is the longitudinal coordinate of the molten pool profile curve in the XOY coordinate system, x is the horizontal coordinate, Wm is the center width ofthe molten pool, W0 is the edge width of the molten pool, and Lm is the total length of the molten pool in the cladding direction. The curve is obtained by summarizing the molten pool shape detectionresult of broadband laser cladding process test. The modeling method of the molten pool contour curve is highly accurate. The shape information of the molten pool is described with simple and effective geometric parameters of the molten pool. A theoretical basis and a data reference are provided for broadband laser cladding process monitoring and cladding layer quality control.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a broadband laser cladding molten pool profile curve and a modeling method thereof. Background technique [0002] Laser cladding is a material surface engineering process that uses a high-energy laser beam to scan the surface of a metal workpiece to melt the cladding layer material and the thin layer on the substrate surface at the same time, and quickly solidify to form a metallurgically bonded coating. Compared with the traditional surface treatment process, laser cladding has many advantages such as small heat-affected zone, low dilution rate of cladding layer and controllable area. At present, due to its high beam energy and wide range of action, broadband laser can effectively reduce the number of cladding layer laps and improve the efficiency of laser cladding repair. It has broad application prospects in manufacturing and repairing. [0003] The s...

AI Technical Summary

Problems solved by technology

At present, the characterization of molten pool shape information mainly uses the molten pool length, width and molten pool area. Using these information can describe the molten pool state to a certain extent, so as to realize the automatic control of laser cladding, but the molten pool length, width and area The geometric shape of the molten pool cannot be uniquely determined, so it is urgent to establish the relationship between the key geometric parameters of the molten pool and the contour curve through process tests, and construct the expression of the molten pool contour curve, which can be used for the geometric shape description and process of laser cladding molten pool. Monitoring provides technical support

Images