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Method and device for conducting laser cladding with assistance of electromagnetic stirring in forced cooling environment

A technology of electromagnetic stirring and forced cooling, applied in the coating process of metal materials, coatings, etc., can solve the problems of the metallurgical bonding strength of the composite coating and the matrix, and the weakening of the bonding strength of the cladding layer and the matrix. High engineering application value, improved quality, obvious effect

Active Publication Date: 2017-05-31
JIANGSU UNIV
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Problems solved by technology

Chinese patent CN102703898A discloses a method and device for refining the solidified structure of the laser cladding layer with an alternating magnetic field. The method for refining the structure of the laser cladding layer with an alternating magnetic field realizes the refinement of the cladding layer grains and the structure Uniform distribution and avoiding stress concentration have achieved the purpose of eliminating cracks in the laser cladding layer and improving the quality. However, using electromagnetic stirring to assist laser cladding metal-based ceramic reinforced particle composite coatings may break the cladding layer and the substrate. The dendritic structure is formed by solidification in the area, which causes the problem of weakening the bonding strength between the cladding layer and the substrate, and cannot effectively solve the problem of the metallurgical bonding strength between the composite coating and the substrate.

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  • Method and device for conducting laser cladding with assistance of electromagnetic stirring in forced cooling environment

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0031] like figure 1 As shown, the electromagnetic stirring assisted laser cladding device in the forced cooling environment of the present invention includes a laser emitting device, a forced cooling control device, an electromagnetic stirring device, a protective atmosphere device, a three-axis linkage workbench, a temperature detection feedback device, a computer 1. The three-axis linkage workbench is composed of an X-direction motion platform 18, a Y-direction motion platform 19, and a Z-direction motion platform 20. The movement of the X-direction motion platform 18, the Y-direction motion platform 19, and the Z-direction motion platform 20 is controlled by a computer 1 .

[0032] The forced cooling control device includes a high-pressure liquid nitrogen tank 24, a...

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Abstract

The invention provides a method and device for conducting laser cladding with the assistance of electromagnetic stirring in a forced cooling environment. The device comprises a fiber laser, a liquid nitrogen forced cooling platform, an electromagnetic stirring platform, a temperature detection and feedback system and a computer control system. The method comprises the steps that a sample is placed on a special clamp made of red copper, the red copper clamp is forcibly cooled through liquid nitrogen, then cold is indirectly transmitted to the sample, and thus forced cooling of the sample in the laser cladding process is achieved. Meanwhile, the magnetic field intensity of the electromagnetic stirring platform is adjusted and controlled through a computer, and thus the laser cladding process with the assistance of electromagnetic stirring under forced cooling is achieved. According to the method and device for conducting laser cladding with the assistance of electromagnetic stirring in the forced cooling environment, laser cladding is conducted with the assistance of forced cooling and electromagnetic stirring to prepare a composite coating so that the good metallurgical bonding capacity of the composite coating with a matrix can be remarkably improved, a hard phase and uniform tissue distribution in the clad coating are achieved, grains are refined, and stress concentration is avoided; and defects such as cracks and pores of the laser clad coating are eliminated, and the quality of the clad coating is improved.

Description

technical field [0001] The invention relates to a method and device for laser cladding assisted by electromagnetic stirring in a forced cooling environment, and belongs to the technical field of laser processing and material surface modification equipment. Background technique [0002] In recent years, domestic and foreign studies on laser cladding metal-based ceramic reinforced particle composite coatings are more hard composite coatings in which ceramic phases such as WC and SiC are added to Ni and Co-based powders. Among them, WC is a hard material with excellent wear resistance, which can be formed into hard alloy or corresponding wear-resistant material and composite coating by means of the carcass metal which acts as a brazing filler metal. Ni-based alloys have good wettability to WC. Therefore, laser cladding WC particle reinforced Ni-based alloy coating has been widely used in the industry because of its excellent wear resistance and moderate price. At present, the...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/10
Inventor 周建忠王松涛徐家乐黄舒何文渊丁浩孟宪凯孙奇
Owner JIANGSU UNIV
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