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Laser cladding method for preparing nickel-based heat-resisting and wear-resisting coating on surface of zirconium alloy

A laser cladding, nickel-based heat-resistant technology, applied in the field of welding and cladding, can solve the problems of low efficiency, preparation of heat-resistant and wear-resistant coatings on the surface of difficult zirconium alloys, etc., to reduce production costs, achieve good cladding effect, good stability

Inactive Publication Date: 2014-06-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology is less efficient than laser cladding technology, and it is difficult to prepare heat-resistant and wear-resistant coatings on the surface of zirconium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] R60702 zirconium alloy plate with a thickness of 10mm, its chemical composition: Zr95.67%, Hf4.0%, Fe0.1%, Cr0.1%, C0.03%, O0.1%; the supply status is cold rolling+ Stress relief annealing, the alloy powder supply method is preset, the spot shape is selected as a circle, and the nickel-based heat-resistant and wear-resistant coating is prepared in situ on the surface of the zirconium alloy by laser cladding.

[0028] (1) Laser cladding equipment and cladding materials

[0029] The laser cladding equipment adopts LDF4000-100 high-power fiber-coupled semiconductor laser produced by German Laserline Company, and the cladding material uses self-fluxing Ni-Cr-Si-B Ni60 alloy powder with a particle size of 150 mesh.

[0030] (2) Preprocessing

[0031] Use sandpaper to polish the surface of the R60702 zirconium alloy substrate to remove scale and oil stains, clean the polished surface of the zirconium alloy substrate with absolute ethanol and acetone; fully mix the Ni60 alloy...

Embodiment 2

[0037] The R60702 zirconium alloy plate with a thickness of 15mm is selected as the substrate, and its chemical composition is: Zr95.67%, Hf4.0%, Fe0.1%, Cr0.1%, C0.03%, O0.1%; On the surface of the zirconium alloy substrate, the laser beam is selected as a circular spot, and the nickel-based heat-resistant and wear-resistant coating is prepared in situ on the surface of the zirconium alloy by laser cladding.

[0038] (1) Laser cladding equipment and cladding materials

[0039] The laser cladding equipment is LDF4000-100 high-power fiber-coupled semiconductor laser produced by German Laserline Company. The cladding material adopts self-fluxing Ni-Cr-Si-B Ni55 alloy powder with a particle size of 160 mesh.

[0040] (2) Preprocessing

[0041] Grind the surface of the R60702 zirconium alloy substrate with a manual grinding wheel to remove scale and oil and expose a smooth metal surface. Clean the polished substrate surface with absolute ethanol and acetone; mix Ni55 alloy powder w...

Embodiment 3

[0047] R60702 zirconium alloy plate with a thickness of 20mm, its chemical composition: Zr95.67%, Hf4.0%, Fe0.1%, Cr0.1%, C0.03%, O0.1%; the laser beam spot is selected as a circle , using synchronous powder feeding laser cladding method to prepare nickel-based heat-resistant and wear-resistant coating on the surface of zirconium alloy in situ.

[0048] (1) Laser cladding equipment and cladding materials

[0049] The laser cladding equipment is LDF4000-100 high-power fiber-coupled semiconductor laser produced by German Laserline Company. The cladding material adopts self-fluxing Ni-Cr-Si-B series Ni60 alloy powder with a particle size of 150 mesh.

[0050] (2) Preprocessing

[0051] Use a manual grinding wheel to grind the surface of the R60702 zirconium alloy substrate to remove scale and oil to expose a smooth metal surface. Clean the polished substrate surface with absolute ethanol and acetone; send the Ni60 alloy powder sideways directly into the laser In the beam, powde...

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Abstract

The invention discloses a laser cladding method for preparing a nickel-based heat-resisting and wear-resisting coating on the surface of a zirconium alloy. The laser cladding method comprises the steps of polishing and washing the surface of a zirconium alloy matrix to be subjected to laser cladding; fully mixing nickel-based alloy powder and an organic binder, blending into a uniform paste, and uniformly coating the paste on the surface of the zirconium alloy matrix to be subjected to laser cladding in advance; introducing argon in advance before performing laser cladding; performing single-channel radiation scanning cladding on a powder pre-placing area on the surface of the zirconium alloy matrix by using laser beams, wherein technological parameters are as follows: the laser power is 2.0-3.8kW, the beam spot diameter is 5mm, the scanning speed is 3-5mm / s, the shielding gas flow rate is 8-15L / min, the laser cladding process is continuously operated, and the dilution rate is not more than 10%. By adopting the laser cladding method disclosed by the invention, the nickel-based heat-resisting and wear-resisting coating is prepared in situ on the surface of the zirconium alloy by using a laser in-situ cladding technique; the laser cladding method is simple and easy in operation process, noise-free, environment-friendly and pollution-free, and can reduce the energy consumption and production cost; the wear-resisting coating is excellent in performance, and can meet operating requirements.

Description

technical field [0001] The invention relates to a method for preparing a nickel-based coating on the surface of a zirconium alloy, in particular to a laser cladding method for in-situ preparation of a nickel-based heat-resistant and wear-resistant coating on the surface of a zirconium alloy, belonging to the technical field of welding and cladding . Background technique [0002] In recent years, with the development of laser technology, the laser cladding method for material surface modification has attracted increasing attention, especially the laser cladding surface modification of more expensive zirconium alloys, which can better meet people's economic needs. sexual demands. The heating and cooling speed of laser cladding technology is fast, the workpiece deformation caused by the thermal cycle is small, and the prepared coating has metallurgical bonding characteristics with the substrate, and the crystal structure of the cladding layer is fine and dense. The in-situ pr...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/05B22F1/00
Inventor 李亚江刘坤
Owner SHANDONG UNIV
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