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Method for preparing nickel-based abrasion resisting and corrosion resisting coating through ultrahigh-rate laser cladding

A technology of laser cladding and corrosion-resistant coating, applied in the direction of coating, metal material coating process, etc., can solve the problems of high cost and low efficiency of laser cladding, and achieve small deformation, superior performance and low dilution rate Effect

Inactive Publication Date: 2018-06-15
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional laser cladding has the above-mentioned problems of low efficiency and high cost, so it is necessary to find a better method for preparing nickel-based wear-resistant and corrosion-resistant coatings by laser cladding

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] The invention provides a method for preparing a nickel-based wear-resistant and corrosion-resistant coating by ultra-high-speed laser cladding. Preferably, the steps of the method include:

[0029] (1) Sieve and purify the nickel-based powder, dry it and store it in vacuum for later use;

[0030] (2) Set the process parameters of ultra-high-speed laser cladding;

[0031] (3) Clamp the substrate with a smooth surface and no defects on the rotary mechanism of the numerical control equipment, and adjust the position of the light spot (laser focus) and powder spot (convergence point of nickel-based powder) relative to the surface of the substrate to be clad, so that the laser beam is large Part of the energy acts on the powder material;

[0032] (4) Coaxial powder feeding ultra-high-speed laser cladding method is used to clad the nickel-based powder obtained in step (1) on the surface of the substrate to obtain a nickel-based wear-resistant and corrosion-resistant coating...

Embodiment 2

[0041] Provided is a method for preparing a nickel-based material coating on the surface of a sucker rod by using ultra-high-speed laser cladding. The diameter of the finished product is 0.4mm, and then the nickel-based coating is clad on the surface of the substrate by the ultra-high-speed laser cladding method of coaxial powder feeding, and then the laser remelting method is used to melt the incompletely melted powder on the coating surface to ensure the surface roughness of the coating . Its specific process steps are:

[0042] (1) Sieve and purify the nickel-based Ni45 powder to obtain a powder with a particle size range of 15-45 μm and a sphericity greater than 90%, and then dry it at a holding temperature of 130°C for a holding time of 2 hours, then vacuum seal it for future use;

[0043](2) Set the process parameters of ultra-high-speed laser cladding. The specific process is: the diameter of the spot is 1.2mm, the linear speed of the column surface, that is, the cladd...

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Abstract

The invention relates to a method for preparing a nickel-based abrasion resisting and corrosion resisting coating through ultrahigh-rate laser cladding, and belongs to the technical field of surface treatment. Through the methods that proper nickel-based powder is selected, the positions of powder gathering points and laser focus points are adjusted, and technology parameters are adjusted, the defect-free abrasion resisting and corrosion resisting coating with the good surface flatness and small thickness can be rapidly and accurately produced, ultrahigh-rate laser cladding is achieved, and the purposes of improving the production efficiency and saving the production cost are achieved.

Description

technical field [0001] The method belongs to the technical field of advanced manufacturing and green manufacturing, and specifically relates to a method for preparing a nickel-based coating by ultra-high-speed laser cladding. Background technique [0002] Compared with ordinary carbon steel and stainless steel, nickel-based materials have the advantages of high temperature resistance, oxidation resistance, corrosion resistance and wear resistance, and are widely used in petroleum, chemical industry, natural gas vehicles, food, instruments, valves, corrosion-resistant pumps, marine, etc. field. However, the use of nickel-based materials increases the cost while improving the performance, especially for parts with special requirements. Due to the large amount of precious metals added, the cost is often several times higher than that of ordinary carbon steel. [0003] It is assumed that if a nickel-based wear-resistant and corrosion-resistant coating is prepared on the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 王淼辉郭瑞峰范斌杜博睿刘恒三葛学元
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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