Cladding layer cross section contour curve under broadband laser effect and modeling method

Abstract

The invention relates to a cladding layer cross section contour curve under broadband laser effect and a modeling method, and a cladding layer cross section contour curvilinear equation is that y=hc-0.5*wc / sin theta+ the square root of [0.5*wc / sin theta)<2>-x<2>], x belongs to [-wc / 2,wc / 2],wherein, y is an ordinate of a coordinate system XOY; X is an abscissa; hc is the height of the cladding layer; wc is the width of the cladding layer; theta is a deposition angle; and the XOY coordinate system takes the bottom center of the cladding layer as a round O, the width direction of the cladding layer as shaft X, the height direction of the cladding layer as the shaft Y; hc, wc and theta are described as the functions of a technological parameter laser power P, a powder layer thickness T and a scan speed V. <{EN2}>The curvilinear equation modeling method comprises the steps of conducting a broadband laser cladding selectivity all factor test to obtain a technological parameter preferable scope; performing central composite design test; intercepting a cladding layer cross section for sampling; plotting the geometric dimension of the cladding layer cross section; establishing a quantification description relation formula of the geometric dimension of the cladding layer cross section and the technological parameter; deriving a contour curvilinear equation of the cladding layer cross section, and verifying the contour curvilinear equation of the cladding layer cross section. <{EN3}>The curve provide data support for the layered slice of a laser cladding application and a locus program; the modeling method is simple; the operability is strong; and the accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of laser cladding, and in particular relates to a cladding layer section profile curve and a modeling method thereof under the action of a broadband laser. Background technique [0002] Laser cladding is an advanced surface treatment technology. Its principle is to use laser to irradiate the alloy powder and the surface of the substrate to melt it, and after rapid solidification, a coating with good metallurgical bonding is formed to improve the wear resistance of the surface of the substrate material. Compared with traditional surface treatment processes such as thermal spraying, arc surfacing, plasma spraying, etc., laser cladding has many advantages such as small heat-affected zone, small deformation, low dilution rate and controllable area. Advantages, it is widely used in the remanufacturing and repairing of steam turbine blades, crankshafts, machine tool spindles and other components. [0003] In the ...

AI Technical Summary

Problems solved by technology

Single-pass cladding layer is an important research object in laser cladding, and its key geometric parameters include cladding layer height, cladding layer width, deposition angle, etc. These parameters are selected for subsequent layered slicing and multi-pass cladding For any combination of process parameters, the geometric parameters of a single cladding layer are different. If process tests are carried out for each combination of process parameters, the production cost and labor cost will be greatly increased. Therefore, it is urgent to pass a small number of processes The experiment established the quantitative relationship between the key geometric parameters of the cladding layer section and the process parameters, and then constructed the expression of the cladding layer section profile curve, providing technical support for the practical application of laser cladding

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