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Method and device of preparing coating by feeding powder synchronously by means of underwater laser cladding

A technology of synchronous powder feeding and underwater laser, which is applied in the coating, metal material coating process, etc., can solve the problems of reducing the performance of the coating, increasing the process cost, and easy to produce pores in the coating, so as to achieve a dense coating structure, Reduce the cost of the process, the effect of not easy porosity

Inactive Publication Date: 2020-05-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current underwater laser additive technology is mainly to pre-set the powder and melt it with laser energy to form a coating. The pre-powder processing requires that the powder type cannot be a material with high oxygen sensitivity; at the same time, it is required that the parts to be clad Take it out of the water environment and spread powder after drying, which increases the process cost; the pre-prepared powder has high requirements on the surface morphology and geometry of the part, and at the same time, the coating is prone to pores during the laser heating process, which limits the additive parts. geometric structure and reduces cladding performance, while increasing operational steps and process difficulty and making it difficult to operate in deep sea

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  • Method and device of preparing coating by feeding powder synchronously by means of underwater laser cladding
  • Method and device of preparing coating by feeding powder synchronously by means of underwater laser cladding
  • Method and device of preparing coating by feeding powder synchronously by means of underwater laser cladding

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Embodiment 1

[0043] figure 1 Embodiment 1 of the present invention provides a method for synchronously feeding underwater laser cladding to prepare coatings, such as figure 1 As shown, the method includes:

[0044] Step S1: Determine the cladding material.

[0045] Before cladding, it is necessary to determine the coating composition of the parts to be clad, that is, the cladding material. Specifically, for the parts that need to be repaired, it is necessary to analyze the original coating composition of the parts to be repaired to determine the coating composition , in order to determine which cladding material to use. For the parts that need to be clad, it is necessary to determine the required cladding composition according to the specific work requirements of the component, so as to further determine which cladding material to use.

[0046] Step S2: cleaning and roughening the surface of the component to be clad.

[0047]The underwater surface cleaning is integrated with the underw...

Embodiment 2

[0064] The embodiment of the present invention provides a method for preparing an anti-corrosion Ni60 alloy coating on A32 deck steel by simultaneous powder feeding underwater laser cladding, the method comprising:

[0065] Step T1: The part to be clad is A32 deck steel, and the required cladding material is determined to be Ni60.

[0066] Step T2: Clean and roughen the surface of the A32 deck steel.

[0067] According to the surface geometry of the A32 deck steel, the underwater robot is used for profiling programming. Polygonal Al with a particle size of 100 μm-200 μm is loaded into the powder feeder system of synchronous powder feeding underwater laser cladding 2 o 3 Granules, turn on the powder feeder before the robot enters the water, use compressed air for cleaning, the pressure of the powder feeding air is 0.4Mpa, and the flow rate of the cleaning gas is 1m 3 / min, clean and roughen the surface of the A32 deck steel part to be clad according to the profiling procedur...

Embodiment 3

[0077] This embodiment provides a device for preparing cladding by synchronous powder feeding underwater laser cladding, Figure 7 It is a schematic diagram of a device for preparing coatings by synchronous powder feeding underwater laser cladding, including: land-based components and underwater components.

[0078] The land-based components include a gas storage module 1 , a control module 2 , a powder feeder module 3 and a laser 4 . The underwater components include synchronous powder feeding underwater laser cladding nozzle 5 , gas recovery module 6 , powder recovery module 7 and underwater robot 9 .

[0079] Specifically, the gas storage module 1 is composed of a high-pressure gas storage cylinder and a valve, and is connected to the synchronous powder feeding laser cladding nozzle 5 and the gas recovery module 6. The function of the connection between the gas storage module 1 and the synchronous powder feeding laser cladding nozzle 5 is The shielding gas and powder feedi...

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Abstract

The invention provides a method and a device of preparing a coating by feeding powder synchronously by means of underwater laser cladding. The method is accomplished by the device of preparing a coating by feeding powder synchronously by means of underwater laser cladding. The method comprises the following steps of determining a cladding material; cleaning and roughening the surface of a to-be-cladded workpiece; detecting whether the surface of the to-be-cladded workpiece meets a working demand or not; adjusting the laser power density of underwater laser cladding; adjusting the cladding workdistance; adjusting the pressures of protective gas and powder feeding gas and the flow of the powder feeding gas; carrying out heating by means of laser beams, wherein the cladding material and a base material of the to-be-cladded workpiece are smelted synchronously to form a molten bath so as to further form the cladding; and in the cladding process, powder of the cladding material is fed intothe molten bath synchronously by using a powder feeding device; and detecting a standard-reaching condition of shape and performance of the prepared cladding.

Description

technical field [0001] The invention relates to the field of functional coatings, in particular to a method and device for preparing coatings by simultaneous powder feeding underwater laser cladding. Background technique [0002] The current maintenance of marine equipment components is still based on regular replacement and land maintenance, resulting in increased economic and labor costs. However, deep-sea emergency maintenance and in-situ manufacturing of emergency components can improve the success rate of deep-sea salvage and rescue efficiency. At present, the main methods for deep sea emergency repair are: underwater welding, underwater plasma spraying and underwater friction stir repair. [0003] Laser cladding technology uses high-energy-density laser beams to simultaneously melt the cladding material and the substrate to form a coating that is metallurgically bonded to the substrate. Compared with the above methods such as underwater welding, underwater plasma spr...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/103C23C24/106
Inventor 李成新刘伊黄小芳李岩娄丽艳李长久
Owner XI AN JIAOTONG UNIV