A Method for Reducing Pore Defects of Laser Cladding Molding Parts

A laser cladding molding and laser cladding technology, applied in the field of additive manufacturing, can solve the problems of difficulty in completely eliminating porosity defects and the concentration effect of gas in the molten pool, achieving a simple and efficient experimental plan and reducing porosity defects. , the effect of good packing speed

Active Publication Date: 2019-05-10
DALIAN UNIV OF TECH
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  • Description
  • Claims
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Problems solved by technology

However, it is difficult for the above three methods to exert a concentrated effect on the gas in the molten pool, and it is also difficult to completely eliminate the pores.

Method used

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  • A Method for Reducing Pore Defects of Laser Cladding Molding Parts
  • A Method for Reducing Pore Defects of Laser Cladding Molding Parts
  • A Method for Reducing Pore Defects of Laser Cladding Molding Parts

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0033] 1) Clean the cladding substrate 5 according to the conventional cleaning method in this field: immerse the cladding substrate 5 in an acetone solution, and clean it with an ultrasonic cleaner at a temperature of 30-40°C for 20-25 minutes, thereby removing the cladding substrate 5 surface dirt; after the cleaning is completed, dry the acetone solution remaining on the surface of the cladding substrate 5 .

[0034] 2) The cladding substrate 5 is placed in the constant magnetic field generator 3 so that it is in a uniformly distributed directional magnetic field environment. After the cladding substrate 5 is placed, fix it with a clamp to avoid position shift under the action of subsequent electromagnetic force.

[0035] 3) Connect the cladding substrate 5 with the positive and negative poles of the DC...

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Abstract

The invention belongs to the technical field of additive manufacturing, and relates to a method for reducing air hole defects of laser cladding molding parts. The laser is used to provide an energy source for the laser cladding process, and the laser is also equipped with an industrial robot to assist the free movement of the laser beam; the coaxial powder feeder is used to provide stable material input for the laser cladding process, and the coaxial powder feeder Mounted on the laser; the constant magnetic field generator is used to output a directional and uniform magnetic field with adjustable intensity. During the loading process, the cladding substrate is placed in the center of the constant magnetic field generator; Adjustable DC power supply, the positive and negative poles of the DC power supply are connected with the cladding substrate. The method of the invention can apply a uniform force in the molten pool, increase the buoyancy of the gas, and reduce porosity defects such as pores. Accelerate the feeding speed during the solidification process of the molten pool, and improve the compactness of laser cladding molding parts. The experimental protocol is simple and efficient.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and relates to a method for reducing air hole defects of laser cladding molding parts, in particular to a method for reducing air hole defects of laser cladding molding parts and improving their compactness. Background technique [0002] Laser cladding technology uses a high-energy-density laser beam to make the cladding material added on the surface of the substrate and the surface material of the substrate undergo a process of rapid melting and solidification. After laser cladding, the cladding layer forms a good metallurgical bond with the substrate surface. Compared with traditional welding, spraying and other processing methods, laser cladding has the advantages of small heat input, fine grains of cladding layer, low dilution rate and compact structure. The use of laser cladding technology can achieve special properties such as high wear resistance, corrosion resistance, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F3/105B22F7/06B33Y10/00
CPCC23C24/10B22F7/062B33Y10/00B22F2007/068B22F2999/00B22F10/00B22F10/36B22F10/25B22F10/366B22F12/50B22F10/322B22F2202/05Y02P10/25
Inventor 刘伟嵬张楠邓德伟张元良李涛刘淑杰郑海彤张洪潮
Owner DALIAN UNIV OF TECH
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