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Nickle-based wire for anti-corrosive spraying of water-cooling wall of biomass boiler and preparation method thereof

A biomass boiler and anti-corrosion spraying technology, which is applied in the field of material processing, can solve the problems of easy falling off, poor corrosion resistance, high boiler maintenance costs, etc., and achieve the effect of low annual loss and improved service life

Inactive Publication Date: 2017-10-27
DANYANG XINHANG SPECIAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating materials used generally have the disadvantages of easy peeling and poor corrosion resistance, and the pipe materials need to be replaced frequently, resulting in high maintenance costs for the boiler.

Method used

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  • Nickle-based wire for anti-corrosive spraying of water-cooling wall of biomass boiler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A nickel-based wire material for anti-corrosion spraying of a water wall of a biomass boiler, comprising the following components in parts by weight: 40 parts of metallic chromium, 50 parts of metallic nickel, 2 parts of metallic titanium, and 0.05 part of lanthanum.

[0018] A method for preparing a nickel-based wire material for anti-corrosion spraying of the water wall of a biomass boiler. The steps of the method are as follows: S1: After mixing the components, they are smelted, forged and formed. Drawing to Φ5.0mm; S2: Heat treatment, alkali boiling and pickling of the wire obtained in S1; S3: Fine drawing, bright annealing, the final wire specification of the obtained wire is Φ1.6mm.

[0019] The tensile strength of the nickel-based wire prepared in this embodiment is 852MPa, the elongation is 23.4%, the impact value is 168J, and the bonding strength is 55.16MPa.

Embodiment 2

[0021] A nickel-based wire material for anti-corrosion spraying of a water wall of a biomass boiler, comprising the following components in parts by weight: 60 parts of metal chromium, 70 parts of metal nickel, 4 parts of metal titanium, and 0.10 part of cerium.

[0022] A method for preparing a nickel-based wire material for anti-corrosion spraying of the water wall of a biomass boiler. The steps of the method are as follows: S1: Melting and forging molding after mixing the components. The melting temperature is 1555° C., and the melting time is 2 hours. Drawing to Φ5.0mm; S2: Heat treatment, alkali boiling and pickling of the wire obtained in S1; S3: Fine drawing, bright annealing, the final wire specification of the obtained wire is Φ2.0mm.

[0023] The tensile strength of the nickel-based wire prepared in this embodiment is 843MPa, the elongation is 24.2%, the impact value is 172J, and the bonding strength is 55.32MPa.

Embodiment 3

[0025] A nickel-based wire material for anti-corrosion spraying of a water wall of a biomass boiler, comprising the following components in parts by weight: 50 parts of metal chromium, 60 parts of metal nickel, 3 parts of metal titanium, and 0.06 part of lanthanum.

[0026] A method for preparing a nickel-based wire material for anti-corrosion spraying of the water wall of a biomass boiler. The steps of the method are as follows: S1: After mixing the components, smelting, forging and forming, the smelting temperature is 1530°C, the smelting time is 1.5h, and then Rough drawing to Φ5.0mm; S2: Heat treatment, alkali boiling and pickling of the wire obtained in S1; S3: Fine drawing, bright annealing, the final wire specification of the obtained wire is Φ1.6mm.

[0027] The tensile strength of the nickel-based wire prepared in this example is 856MPa, the elongation is 24.7%, the impact value is 175J, and the bonding strength is 55.27MPa.

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Abstract

The invention discloses a nickle-based wire for anti-corrosive spraying of a water-cooling wall of a biomass boiler. The nickle-based wire comprises the following components in parts by weight: 40-60 parts of metal chromium, 50-70 parts of metal nickle, 2-4 parts of metal titanium and 0.05-0.10 part of rare-earth element. The nickle-based wire disclosed by the invention has the advantages that due to addition of more than 40% of metal chromium into the nickle-based wire, the wire has high oxidation resistance and corrosion resistance. The nickle-based wire is sprayed on the water-cooling wall of the biomass boiler and 'four pipes' of the boiler and boiler parts working in high-temperature oxidation and high-temperature corrosion to form a layer of high-density Cr2O3 oxide film with self-bonding effect with a basal body, and the sulfide-erosion resistance of the high-density Cr2O3 oxide film is 60 times of that of carbon steel; and the coating layer has good high-temperature oxidation and heat-corrosion resistance, the service life of the boiler equipment can be greatly prolonged, and the annual loss is reduced from 1.5-2.0mm to 37mu m or lower.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a nickel-based wire material for anticorrosion spraying of a water wall of a biomass boiler and a preparation method thereof. Background technique [0002] Biomass boiler is a boiler that uses biomass energy as fuel. The fuel used is sent into the furnace by the screw feeder, and is gradually preheated by the action of high-temperature flue gas and primary air, dried, ignited, and burned, thereby releasing a huge Heat to burn violently. The water-cooled wall of the boiler is the main heating part, distributed around the furnace of the boiler, absorbing the radiant heat of the high-temperature flame and flue gas in the furnace, and the high temperature accelerates the corrosion of the coating of the water-cooled wall. [0003] In addition, the flue gas contains a large amount of corrosive gases, such as sulfur dioxide, etc. When these flue gases are discharged through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02
CPCC22C19/058C22C1/023
Inventor 朱新军
Owner DANYANG XINHANG SPECIAL ALLOY