Broadband laser cladding molten pool contour curve and modeling method thereof

A laser cladding and contour curve technology, applied in the field of surface engineering, can solve the problem that the width and area cannot uniquely determine the geometry of the molten pool, and achieve the effect of high accuracy, strong versatility and improved quality control.

Active Publication Date: 2018-05-15
WUHAN UNIV OF TECH
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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 un

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  • Broadband laser cladding molten pool contour curve and modeling method thereof
  • Broadband laser cladding molten pool contour curve and modeling method thereof
  • Broadband laser cladding molten pool contour curve and modeling method thereof

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] like figure 1 As shown, a broadband laser cladding melt pool profile curve, on the plane of the broadband laser cladding surface and perpendicular to the laser emission direction, the melt pool profile curve equation is,

[0029]

[0030] Among them, the XOY coordinate system is a Cartesian coordinate system established with the midpoint of the molten pool front as the origin O and the cladding scanning direction as the negative direction of the x-axis. y is the ordinate of the molten pool profile curve in the XOY coordinate system, and x is the horizontal Coordinates, W m is the center width of molten pool, W 0 is the edge width of molten pool, L m is the total length of molten pool in cladding direction, L 0 is the distance from the center of the molten pool to the solidification edge in the cladding direction;

[0031] The maximum valu...

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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...

Claims

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Application Information

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IPC IPC(8): G01B11/24G06F17/50
CPCG01B11/24G06F30/00G06F2111/10
Inventor 秦训鹏雷凯云华林倪茂
Owner WUHAN UNIV OF TECH
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