Powder material for boiler tube high temperature resistance and wear resistance protecting and preparation method thereof

A powder material, high temperature wear resistance technology, applied in the field of surface engineering, can solve the problems of high powder splash loss rate, high microcrack density, low cladding efficiency, etc., to achieve low preparation cost, low dilution rate, prolonged high temperature wear resistance, etc. effect of life

Inactive Publication Date: 2014-06-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a powder material and preparation method for high-temperature wear-resistant protection of boiler tubes, which overcomes the problems of low cladding efficiency, surface layer oxidation, high powder splash loss rate, and high micro-crack density.

Method used

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  • Powder material for boiler tube high temperature resistance and wear resistance protecting and preparation method thereof
  • Powder material for boiler tube high temperature resistance and wear resistance protecting and preparation method thereof

Examples

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Embodiment

[0035] Example: Preparation of wear-resistant cladding layer on the outer surface of the suspension pipe of the economizer

[0036] 1. Preparation of finished powder

[0037] 1. Preparation of powder raw materials

[0038] The content (weight percent) scope of described powder raw material is as follows:

[0039] The components of the mixed powder material and the content of each component (percentage by weight) are: titanium-nickel alloy powder (particle size -200+400 mesh, purity ≥99.5%): 15%; graphite carbon powder: (particle size -300+600 mesh, Purity ≥ 99.5%): 2.625%; silicon powder: (particle size -200+350 mesh, purity ≥ 99.5%): 1%; nickel-chromium alloy powder (Ni80Cr20): (particle size -200+400 mesh, purity ≥ 99.5%) : 12%; iron boride powder: (particle size -200+400 mesh, purity ≥ 99.5%): 8%; trichromium carbide powder (Cr 3 C 2 , particle size -200+400 mesh, purity ≥ 99.5%): balance.

[0040] Among them, the content of each component in titanium-nickel alloy powd...

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Abstract

The invention relates to powder material for boiler tube high temperature resistance and wear resistance protecting and a preparation method thereof, and belongs to the technical field of surface engineering. The power material comprises the following components, by weight percentage, 10-20% of titanium-nickel alloy powder, 1.5-3.5% of graphite powder, 0.5-1% of silica powder, 8-25% of nickel-chromium alloy powder Ni80Cr20, 5-10% of iron boride powder and the balance of tri-chromium dicarbide powder. The preparation method comprises the following steps that power material is prepared, mix powder is formed, liquid-containing binders are prepared, sizing agents are prepared from the mix powder, prilling is completed through spray drying, and finished product powder is prepared from screening the prilling powder and is used for preparing a cladding layer. The metal cladding layer with high wear resistant duplex ceramic is formed through laser cladding, and the hardness ranges from 1100 HV to 1600 HV, so that the powder material for boiler tube high temperature resistance and wear resistance protecting and the preparation method thereof has the advantages that efficiency of the laser cladding is higher, loss of powder spattering is low, grain of the cladding layer is tiny, wear resistance of the cladding layer is high and the like.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular provides a powder material for high-temperature wear-resistant protection of boiler tubes and a preparation method; it is suitable for circulating fluidized bed boiler water wall tubes, superheater tubes, and economizer suspension tubes Laser cladding and anti-wear treatment of external bed pipes and other components. Background technique [0002] Circulating fluidized bed boilers have the advantages of strong fuel adaptability, high combustion efficiency, good peak shaving performance, direct desulfurization in the furnace, and low concentration of harmful gas emissions. However, due to various reasons such as equipment design, manufacturing, installation, and operating technology , circulating fluidized bed boilers have problems such as insufficient boiler output, coking in the combustion chamber, and wear of the heating surface during operation. Among them, the we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C23C24/10C22C29/02C22C30/00
Inventor 刘宗德汪洋岳鹏
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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