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A kind of cellular and columnar composite structure coating used in marine environment and its preparation method

A combined structure and marine environment technology, applied in the direction of coating, metal material coating process, etc., can solve the problems of arc welding quality cannot be guaranteed, high laser manufacturing cost, complicated operation, etc., to enhance the solid solution strengthening effect and improve the shape. Core rate, simple operation effect

Active Publication Date: 2022-03-25
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology can improve the impact resistance and corrosion resistance of coating materials, but if you want to obtain ultra-thick coatings with strong metallurgical bonding, you need to alternately repeat plasma spraying and plasma spraying, which is costly and difficult to operate.
[0010] Chinese patent application publication number CN106825930A is a device for remanufacturing railway train wheels by composite cladding with laser arc welding. It proposes a device structure that combines broadband laser and oscillating arc welding, which effectively solves the problem of high laser manufacturing costs and poor arc welding quality. Guaranteed Disadvantages
The patent uses two technologies, the operation is complicated, time-consuming and inefficient

Method used

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  • A kind of cellular and columnar composite structure coating used in marine environment and its preparation method
  • A kind of cellular and columnar composite structure coating used in marine environment and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Powder Preparation

[0036] The raw material of the wear-resistant and corrosion-resistant coating is alloy powder, which is selected from metal powders such as Ni, Cr, Fe, Co, Mn, etc., and the particle size of the powder is 48-75 μm. The powder ratio is molar ratio, where the ratio of alloy powder in the first layer is Co:Cr:Fe:Ni:Mn=1:1:1:1:1, and the ratio of alloy powder in the second layer is Co: Cr: Fe: Ni: Mn: Ti: B 4 C=1:1:1:1:1:0.25:0.08, put the prepared metal powder in a three-dimensional mixer and mix for 24 hours.

[0037] Step 2: Substrate Surface Pretreatment

[0038] Before the cladding experiment, the substrate was cleaned with decontamination powder, followed by rough grinding with an angle grinder, fine grinding and leveling with sandpaper, and then ultrasonic cleaning of the substrate in absolute ethanol for 30 minutes to remove oil stains on the substrate and rust, and finally put it in an oven at 60°C for 2 hours.

[0039] Step 3: Lase...

Embodiment 2

[0045] Step 1: Powder Preparation

[0046] The powder ratio is molar ratio, where the ratio of the alloy powder of the first layer is Co:Cr:Ni:Mn:Fe=1:1:1:1:1, and the ratio of the alloy powder of the second layer is Co:Cr :Fe:Ni:Mn:Ti:B 4 C=1:1:1:1:1:0.5:0.16, put the prepared metal powder in a three-dimensional mixer and mix for 24 hours.

[0047] Step 2: Substrate Surface Pretreatment

[0048] Before the cladding experiment, the substrate was cleaned with decontamination powder, followed by rough grinding with an angle grinder, fine grinding and leveling with sandpaper, and then ultrasonic cleaning of the substrate in absolute ethanol for 30 minutes to remove oil stains on the substrate and rust, and finally put it in an oven at 60°C for 2 hours.

[0049] Step 3: Laser swing cladding the first alloy layer

[0050] The laser cladding method is adopted, the laser power is 1200W, the scanning speed is 8mm / s, the spot diameter is 3mm, the overlap rate is 33%, the swing ampl...

Embodiment 3

[0054] Step 1: Powder Preparation

[0055] The powder ratio is molar ratio, where the ratio of the alloy powder of the first layer is Co:Cr:Ni:Mn:Fe=1:1:1:1:1, and the ratio of the alloy powder of the second layer is Co:Cr :Fe:Ni:Mn:Ti:B 4 C=1:1:1:1:1:1:0.33, put the prepared metal powder in a three-dimensional mixer and mix for 24 hours.

[0056] Step 2: Substrate Surface Pretreatment

[0057] Before the cladding experiment, the substrate was cleaned with decontamination powder, followed by rough grinding with an angle grinder, fine grinding and leveling with sandpaper, and then ultrasonic cleaning of the substrate in absolute ethanol for 30 minutes to remove oil stains on the substrate and rust, and finally put it in an oven at 60°C for 2 hours.

[0058] Step 3: Laser swing cladding the first alloy layer

[0059] The laser cladding method is adopted, the laser power is 1200W, the scanning speed is 8mm / s, the spot diameter is 3mm, the overlap rate is 33%, the swing amplit...

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Abstract

The invention discloses a combined cellular and columnar structure coating used in the marine environment and a preparation method thereof. The first layer of alloy powder is clad on a pretreated substrate by swinging laser beams to change fast vertical dendrites into cellular crystals. , which not only improves the bonding force between the cladding layer and the substrate, but also blocks the transmission of liquid corrosive media to the substrate to improve corrosion resistance; then, on the obtained cellular crystal cladding layer, the second layer of alloy powder is quickly clad with a laser beam to form The surface alloy layer does not swing, and a fine dendrite structure with columnar structure is obtained on the basis of cellular crystals. The invention not only reduces the production cost of the material suitable for the marine environment, but also improves the wear resistance and corrosion resistance of the material.

Description

technical field [0001] The invention relates to a wear-resistant and corrosion-resistant coating in a marine environment and a preparation method thereof, especially having a combined structure of cells and columns, and belongs to the field of surface treatment of metal materials. Specifically, it discloses a high-entropy alloy coating and method for efficiently obtaining a high-entropy alloy coating with a cellular and columnar combined structure by using laser cladding, which simultaneously improves wear resistance and corrosion resistance, and is used for marine hydraulic valve bodies, platform columns, The surface of the stern shaft, polar icebreaker ships, and key parts in petroleum, chemical and other fields is strengthened to improve the wear resistance by 2-5 times. Background technique [0002] In the development of marine resources and marine engineering equipment, a large number of key parts work in complex, severe wear and corrosion environments. Because the prot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C30/00
CPCC23C24/106C23C24/103C22C30/00
Inventor 崔洪芝宋晓杰崔中雨满成李燚周高晓华姜迪王昕李健
Owner OCEAN UNIV OF CHINA
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