Lateral powder feeding device for high-speed laser cladding and its cladding process

A technology of lateral powder feeding and laser cladding, which is applied in the coating process and coating of metal materials, can solve the problems of inability to clad large components, low powder utilization rate, large heat-affected zone, etc., and achieve simple structure, The effect of high powder utilization rate and excellent performance

Active Publication Date: 2020-10-13
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above existing problems, the present invention aims to provide a lateral powder feeding device for high-speed laser cladding and its cladding process. The lateral powder feeding device used in the cladding process can solve the problem of relatively thick cladding layer The problem of slow covering speed and low powder utilization rate
[0005] In order to solve the problems of traditional laser cladding, such as slow cladding speed, incapable of cladding large components, high dilution layer, large heat-affected zone, and low powder utilization rate in traditional laser cladding, this invention designs a high-speed laser cladding machine The cladding process of the lateral powder feeding device was studied; using this high-speed laser cladding lateral powder feeding device can greatly increase the cladding speed and reach 150 m / min

Method used

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  • Lateral powder feeding device for high-speed laser cladding and its cladding process
  • Lateral powder feeding device for high-speed laser cladding and its cladding process
  • Lateral powder feeding device for high-speed laser cladding and its cladding process

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Embodiment 1

[0051] Embodiment 1: with reference to attached Figure 7 As shown, using this device to carry out high-speed laser cladding of nickel-based alloy powder on the surface of 45# steel, the parameters used are: laser power 1200W, scanning speed 120m / min, spot diameter 1mm, shielding gas is argon, The protective gas flow rate is 15g / L, the powder feeding speed is 15g / min, the overlap rate is 30%, and the defocusing amount is 10mm. Under these parameters, the fiber laser is used for cladding on the surface of 45# steel; the cladding layer 11 is shown in the figure below. It can be seen that the surface of the coating is smooth and free of defects such as inclusion holes. The cladding layer 11 was infiltrated, and no cracks were found. The surface hardness of the cladding layer 11 was about three times that of the substrate 10; the cladding layer 11 and the substrate 10 reached a metallurgical bond, and the thickness of the cladding layer 11 was between 20-60 μm , the diluted laye...

Embodiment 2

[0052] Embodiment 2: with reference to attached Figure 8 As shown, this device is used to perform high-speed laser cladding of IN625 alloy powder on the surface of the bearing. The cladding head remains stationary, and the bearing moves forward while rotating. The cladding parameters used are 1100W, the spot diameter is 1mm, and the shielding gas is argon. Gas, the protective gas flow rate is 15g / L, the powder feeding speed is 15g / min, the overlap rate is 30%, the defocusing amount is 10mm, the bearing speed is 120r / min, and the bearing travel speed is 120m / min; cladding layer 11 As shown below. It can be seen that the thickness of the cladding layer 11 is very thin and metallurgically combined with the bearing, the surface is flat and smooth, there are no unmelted powder particles, and there are no defects such as small holes. The cladding layer 11 is infiltrated, and no cracks are found on the surface. Compared with the bearing itself, the wear resistance of the cladding l...

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Abstract

The invention discloses a lateral powder feeding device for high-speed laser cladding and a cladding process thereof. The lateral powder feeding device includes a shell, a powder carrying air channel, a powder nozzle and a powder outlet end, and the powder carrying air channel is arranged on the side of the shell. , the powder nozzle and the discharge end of the shell, the powder outlet end is bent at the end of the powder nozzle, a reciprocating groove is opened on the inner wall of the shell body at the top of the shell, and an elastic reciprocating detachable filter assembly is arranged in the reciprocating groove; According to the above-mentioned powder feeding device and the cladding process using the powder feeding device, the beneficial effects are: the thickness of the cladding layer is greatly reduced, which can reach below 250 μm; the cladding speed is significantly increased, which can reach 150 m / min. The following is 100‑250 times faster than conventional laser cladding. At the same time, the dilution layer is reduced to ensure the excellent performance of the cladding layer; the powder is fed under the action of gravity, so the powder is fed evenly and the powder utilization rate is high; the structure is simple, the powder feeding is flexible, and it is suitable for various forms of structural parts and various cladding environments. .

Description

technical field [0001] The invention relates to a lateral powder feeding device for high-speed laser cladding and its cladding process. Background technique [0002] The process of material damage, especially the corrosion, wear and fatigue of materials, starts from the surface of the material. In order to prevent material corrosion and wear, a layer of coating is formed on the surface of the material to enhance the corrosion resistance and wear resistance of the material surface. The commonly used methods for forming coatings on the surface of materials are electrochrome plating, thermal spraying and laser cladding. Electrochrome plating is a chrome-plating technology, in which chromium in acid is plated on the surface of the material, and the thickness of the coating formed on the surface of the workpiece is between 10-25µm, and the coating is formed very quickly, but this technology is not perfect ideal. On the one hand, when the coating is formed by electroplating, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 李瑞峰贺培元陈朝辉张宇浩陈书锦刘彬
Owner JIANGSU UNIV OF SCI & TECH
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