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A kind of preparation method of anti-high temperature oxidation wear-resistant coating

A high-temperature oxidation-resistant and wear-resistant coating technology, which is applied to coatings, metal material coating processes, melt spraying, etc., can solve the problems of unsatisfactory wear resistance and high-temperature oxidation resistance, and achieve a simple and reliable preparation method. , excellent wear resistance, high deposition efficiency

Active Publication Date: 2018-03-02
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-efficiency, low-cost, capable of preparing a high-efficiency, low-cost, and capable of preparing a high-efficiency, low-cost, and excellently bonded to the matrix. Preparation method of high-temperature oxidation-resistant and wear-resistant coating of coating with excellent abrasion resistance and high-temperature oxidation resistance

Method used

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preparation example Construction

[0021] The preparation method of the anti-high temperature oxidation wear-resistant coating of the present invention comprises the following steps:

[0022] The first step: degrease and degrease the heat-resistant steel;

[0023] Step 2: Sandblasting the surface of the heat-resistant steel, the sand material is 46# zirconium corundum, the sandblasting pressure is 0.2-0.4MPa, and the sandblasting distance is 100-200mm;

[0024] Step 3: Use supersonic plasma spraying technology to prepare a high-temperature oxidation-resistant and wear-resistant coating on the surface of heat-resistant steel. The spraying current is 150-250A, the compressed air pressure is 0.2-0.5MPa, and the propane flow rate is 1-2.5l / min, spraying powder is NiCoCrAlYTa+10%Al 2 o 3 Composite powder, powder particle size is 5-35μm, powder feeding nitrogen flow rate is 8-16l / min, powder feeding rate is 10-50g / min, spray distance is 150-300mm, gun speed is 300-1500mm / s, spraying build-up The connection is 6-1...

Embodiment 1

[0027] 1. Degrease and degrease the Cr28Ni48W5 heat-resistant steel sample and install it in the spraying fixture;

[0028] 2. Before spraying, sandblast the sprayed surface of Cr28Ni48W5 heat-resistant steel. The sand material is 46# zirconium corundum. The sandblasting pressure is controlled at 0.3MPa, and the sandblasting distance is 150mm. After sandblasting, the surface of Cr28Ni48W5 heat-resistant steel is rough The degree of uniformity, and use compressed air to blow away the sand particles that may remain on the surface;

[0029]3. Supersonic plasma spraying is adopted, the spraying current is 210A, the compressed air pressure is 0.3MPa, and the propane flow rate is 2.1l / min; under the condition of not feeding powder, use plasma flame flow to preheat Cr28Ni48W5 heat-resistant steel twice; spray powder NiCoCrAlYTa+10%Al 2 o 3 Composite powder, the powder particle size is 5-35μm, the powder feeding nitrogen flow rate is 12l / min, the powder feeding rate is 30g / min, the ...

Embodiment 2

[0032] 1. Degrease and degrease the Cr28Ni48W5 heat-resistant steel sample and install it in the spraying fixture;

[0033] 2. Before spraying, sandblast the sprayed surface of Cr28Ni48W5 heat-resistant steel. The sand material is 46# zirconium corundum. The sandblasting pressure is controlled at 0.3MPa, and the sandblasting distance is 150mm. After sandblasting, the surface of Cr28Ni48W5 heat-resistant steel is rough The degree of uniformity, and use compressed air to blow away the sand particles that may remain on the surface;

[0034] 3. Using supersonic plasma spraying, the spraying current is 180A, the compressed air pressure is 0.3MPa, and the propane flow rate is 1.5l / min; under the condition of not feeding powder, use the plasma flame flow to preheat Cr28Ni48W5 heat-resistant steel twice; spray powder NiCoCrAlYTa+10%Al 2 o 3 Composite powder, the powder particle size is 5-35μm, the powder feeding nitrogen flow rate is 12l / min, the powder feeding rate is 20g / min, the ...

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Abstract

The invention discloses a preparation method of a high-temperature oxidation resistant and wear resistant coating layer. The preparation method comprises the following steps: firstly, grease and oil of heat resistant steel are removed; then, the sand blasting treatment is performed for the surface of the heat resistant steel; and a supersonic plasma spraying technology is adopted to prepare a NiCoCrAlYTa+10% Al2O3 high-temperature oxidation resistant and wear resistant coating layer on the surface of the heat resistant steel. The preparation method is high in coating layer deposition efficiency, low in cost and uniform and controllable in thickness, can prepare the coating layer having excellent combining performance with a basal body and excellent wear resistance and high-temperature oxidation resistance, can prominently improve the performance of related parts, prolongs the service life, and improves the product quality.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment, and in particular relates to a method for preparing a high-temperature oxidation-resistant and wear-resistant coating on a heat-resistant steel surface. Background technique [0002] With the rapid development of the national economy, the demand for high-quality cold-rolled thin steel sheets continues to increase, and a continuous annealing production line suitable for continuous and mass production has been developed. In the continuous annealing furnace, the furnace rollers are in poor working conditions and are subjected to mechanical stress and thermal corrosion. Their service life and surface quality directly affect the operating rate and quality of the product. Thermal spray protective coatings have been widely used on key components in annealing furnaces. Since the surface of the steel strip must be free from scratches and minor flaws after annealing, the quality of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/134C23C4/02
CPCC23C4/02C23C4/06
Inventor 杨焜刘敏毛杰牛少鹏邓畅光周克崧
Owner GUANGDONG INST OF NEW MATERIALS
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