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Amorphous thermal spraying material resistant to high temperature corrosion and wear

A technology of thermal spraying and amorphous alloy, which is applied in the field of materials, can solve the problems of stress cracking, high cost, pulverization, etc., and achieve the effect of excellent high temperature corrosion resistance and wear resistance, low cost and high bonding strength

Active Publication Date: 2019-07-12
珠海弘德表面技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of traditional high-temperature corrosion-resistant alloy materials is high due to the main components of niobium, molybdenum, titanium, nickel, etc., and the wear resistance is not excellent; imitation enamel coatings generally have unreasonable construction thickness control and heating curve Stress cracking, powdering due to loss of matrix material after long-term use

Method used

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  • Amorphous thermal spraying material resistant to high temperature corrosion and wear
  • Amorphous thermal spraying material resistant to high temperature corrosion and wear

Examples

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Embodiment 1

[0024] An amorphous alloy powder, prepared by conventional methods from the following raw materials in weight percentage: Mo: 22 parts, B: 8 parts, C: 10 parts, Ni: 2 parts, Cr: 32 parts, Si: 2 parts, Fe: 12 parts, Re: 0.03 parts, other impurity elements total ≤ 0.05 parts.

[0025] In this example, the conventional method for preparing amorphous alloy powder is the nitrogen atomization method (cooling rate is 500-1000°C / s).

[0026] The rare earth element Re can increase the elongation and area reduction of the deposited metal, and can significantly improve the sulfide corrosion resistance of the deposited metal. Among them, La, Ce, and Sc can improve the thermoplasticity of molybdenum-chromium-iron alloy. In this embodiment, Re is a combination of La and Ce.

[0027] Impurities in alloy powders are components that cannot be avoided during the preparation process and material selection process, including Mn, S, P, etc.

[0028] In this embodiment, a product comprising a hi...

Embodiment 2

[0030] An amorphous alloy powder, prepared by conventional methods from the following raw materials in weight percentage: Mo: 5 parts, B: 2 parts, C: 0.5 parts, Ni: 0.1 parts, Cr: 5 parts, Si: 0.1 parts, Fe: 0.3 parts, Re: 0.01 parts, other impurity elements total ≤ 0.05 parts. Wherein, Re is a combination of La and Sc.

[0031] In this embodiment, a product comprising a high-temperature, corrosion-resistant and wear-resistant coating is formed by spraying the above-mentioned amorphous alloy powder on the surface of the nickel-based alloy with a plasma spraying device. Among them, the nickel-based alloy is Inconel 625; the coating thickness is 400 μm. The surface bonding strength is 52.1MPa.

Embodiment 3

[0033] An amorphous alloy powder, prepared by conventional methods from the following raw materials in weight percentage: Mo: 30 parts, B: 18 parts, C: 25 parts, Ni: 3 parts, Cr: 50 parts, Si: 5 parts, Fe: 20 parts, Re: 0.05 parts, other impurity elements total ≤0.05 parts. Wherein, Re is Ce.

[0034] In this embodiment, a product comprising a high-temperature, corrosion-resistant and wear-resistant coating is formed by spraying the above-mentioned amorphous alloy powder on the surface of the nickel-based alloy with a laser cladding device. Among them, the nickel-based alloy is Inconel 625; the coating thickness is 700 μm. The surface bonding strength is 55.2MPa.

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Abstract

The invention provides an amorphous thermal spraying material resistant to high temperature corrosion and wear. The material is mainly composed of molybdenum, chromium and iron relatively low in cost,an alloy is modified by adding trace rare earth elements, the bonding strength is high and at least reaches to 50 MPa, corrosion resistance is superior to that of a traditional high-temperature alloymaterial, and wear resistance is excellent. Compared with other materials, the amorphous thermal spraying material is low in cost, high temperature corrosion resistance and wear resistance are excellent, and the amorphous thermal spraying material can be used as a thermal spraying coating material or wear-resistant surfacing material and is suitable for wide industrial production.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to an amorphous thermal spraying material resistant to high temperature, corrosion and wear. Background technique [0002] High temperature corrosion and wear are the main causes of material damage. High-temperature corrosion refers to the chemical or electrochemical reaction between metal materials and oxygen, sulfur, carbon, nitrogen and other elements in the ambient atmosphere at high temperatures, resulting in deterioration or destruction of materials. The heating surface of the combustion boiler, especially the water wall, is severely corroded by high temperature, accompanied by high temperature erosion. The high-temperature corrosion on the water wall of the combustion boiler is usually a sulfide-type high-temperature corrosion, which is mainly caused by hydrogen sulfide gas in the flue gas. The highly corrosive acid gas produced in the combustion area reacts with the meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/129C23C4/134C23C24/10C22C45/00C22C45/10C22C45/02
CPCC22C45/00C22C45/006C22C45/02C22C45/10C23C4/06C23C24/103C23C4/129C23C4/134
Inventor 胡东润
Owner 珠海弘德表面技术有限公司
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