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Powdered material used for preparing high-temperature abrasion-proof anticorrosion cladding layer and preparation method

A powder material, high-temperature wear-resistant technology, applied in metal material coating process, coating, molten spraying, etc., can solve the problems of poor high-temperature chlorine corrosion resistance, peeling failure, poor wear resistance, etc., to achieve wear resistance The effect of long corrosion life, low preparation cost and low dilution rate

Active Publication Date: 2013-07-31
北京国能德峰材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. The coating and the substrate are mechanically combined, and the coating is easy to fall off and fail under the high-speed impact of particles;
[0009] 2. The coating thickness is limited, the general coating thickness is 300-500μm, and the thick coating (500-1500μm) is easy to peel off and fail under thermal stress;
[0010] 3. If the water-cooled wall tube is sprayed twice, it is difficult to remove the hard particles contained in the original coating residue by sandblasting, resulting in low bonding strength and worse anti-wear effect of the second sprayed coating;
[0011] 4. There is a porosity of 2-10% in the thermal spray coating, even if the sealing agent is applied, it is easy to form corrosion channels, which significantly reduces the overall wear and corrosion resistance of the coating
[0013] Although Ni-Cr-Mo series and Ni-Fe-Cr-Mo series alloys have excellent high temperature chlorine corrosion resistance, their wear resistance is poor; Fe-Cr-B-C series, Ni-Cr-B-Si series, etc. The alloy has high wear resistance, but its high temperature chlorine corrosion resistance is poor
The existing wear-resistant and corrosion-resistant materials used in power plant boilers are difficult to meet the wear-resistant and high-temperature chlorine corrosion resistance requirements of water-cooled wall tubes and economizer tubes under the co-combustion conditions of coal and biomass

Method used

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  • Powdered material used for preparing high-temperature abrasion-proof anticorrosion cladding layer and preparation method
  • Powdered material used for preparing high-temperature abrasion-proof anticorrosion cladding layer and preparation method
  • Powdered material used for preparing high-temperature abrasion-proof anticorrosion cladding layer and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Preparation of wear-resistant and corrosion-resistant cladding layer on the heating surface of the water-cooled wall tube

[0038] 1. Preparation of mixed powder

[0039] 1. Preparation of powder raw materials

[0040] The weight percent scope of described powder raw material is as follows:

[0041] NbC powder (particle size-140+300 mesh, purity ≥99.5%): 10wt.%; TiC powder (particle size-150+300 mesh, purity ≥99.5%): 4wt.%; Ti powder (particle size-150+300 mesh, Purity ≥ 99.5%): 1wt.%; VC powder (particle size -140+300 mesh, purity ≥ 99.5%): 4wt.%; Ni-Cr-Mo alloy powder (particle size -140+325 mesh): balance; Among them, the composition of Ni-Cr-Mo alloy powder is: Cr: 25wt.%, Mo: 15wt.%, Co: 1wt.%, W: 3wt.%, Ni: balance; Ni-Cr-Mo alloy The powder is prepared by the existing mature gas atomization method.

[0042] 2. Preparation process of mixed powder

[0043] (1) According to the various powder ratios described in step 1, weigh the various powders requ...

Embodiment 2

[0054] Example 2: Preparation of wear-resistant and corrosion-resistant cladding layer on the outer surface of the economizer tube

[0055] 1. Preparation of mixed powder

[0056] 1. Preparation of powder raw materials

[0057] The weight percent scope of described powder raw material is as follows:

[0058] NbC powder (particle size-140+300 mesh, purity ≥99.5%): 11wt.%; TiC powder (particle size-150+300 mesh, purity ≥99.5%): 5wt.%; Ti powder (particle size-150+300 mesh, Purity ≥ 99.5%): 1.5wt.%; VC powder (particle size -140+300 mesh, purity ≥ 99.5%): 4wt.%; Ni-Cr-Mo alloy powder (particle size -140+325 mesh): balance ; Among them, the composition of Ni-Cr-Mo alloy powder is: Cr: 27wt.%, Mo: 13wt.%, Co: 1wt.%, W: 3wt.%, Ni: balance; Ni-Cr-Mo system Alloy powder is prepared by the existing mature gas atomization method.

[0059] 2. Preparation process of mixed powder

[0060] (1) According to the various powder ratios described in step 1, weigh the various powders require...

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Abstract

The invention relates to a powdered material used for preparing high-temperature abrasion-proof anticorrosion cladding layer and a preparation method, belonging to the technical field of surface engineering. The powdered material comprises the following components according to the constituent content: 8-15wt.% of NbC powder, 3-8wt.% of TiC powder, 1-1.5wt.% Ti powder and 3-6wt.% of VC (vitamin C)powder, and the balance of Ni-Cr-Mo system alloy powder. The preparation method comprises the steps of preparing powder stock, preparing mixed powder, and preparing a cladding layer. The powdered material and the preparation method have the advantages of simultaneously meeting the technical requirements of high temperature, abrasion resistance and chlorine corrosion resistance of a boiler tube, observably prolonging the service lives of a water wall tube, an economizer tube and a superheater tube.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular provides a powder material and a preparation method for preparing a high-temperature wear-resistant and corrosion-resistant cladding layer; the powder material is clad with a laser beam to form a wear-resistant and corrosion-resistant cladding layer; Wear-resistant and corrosion-resistant surface treatment of circulating fluidized bed boiler water wall tubes, economizer tubes and superheater tubes for coal and biomass co-combustion. Background technique [0002] Co-combustion of coal and biomass is a new combustion method that comprehensively utilizes biomass energy and coal resources while reducing pollution emissions. The use of coal and biomass co-combustion technology can increase boiler efficiency, reduce fuel consumption, and reduce pollutants (NOx, SO 2 ) and the greenhouse gas CO 2 emissions. [0003] Because circulating fluidized bed boilers have strong a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C24/10C22C32/00B22F1/00
Inventor 刘宗德王永田刘再德温鹏任威宇钟成圆
Owner 北京国能德峰材料技术有限公司
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