Corrosion-resistant alloy material resistant to high-temperature chlorine corrosion and application method

A technology of corrosion-resistant alloys and application methods, applied in welding/cutting media/materials, metal processing equipment, welding media, etc., can solve the problem that the anti-corrosion effect is difficult to achieve in power plants, and achieve the effect of increasing stress and increasing wear resistance.

Pending Publication Date: 2020-12-08
SHANGHAI FINEWAY ENERGY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most practical application is to use metal coating for protection. The metal coating material generally used is mainly 625 nickel-based alloy welding wire. Obvious anti-corrosion effect, but the comprehensive anti-corrosion effect is still difficult to meet the requirements of power plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the first embodiment of the present invention, a kind of anti-corrosion alloy welding wire used for surfacing and anti-corrosion of the heating surface of the boiler superheater of the biomass power plant is provided through a kind of high-temperature chlorine-resistant corrosion-resistant alloy material of the present invention

[0021] Step 1 alloy melting

[0022] In terms of mass percentage, the composition of the alloy material is selected as: 30% Cr, 6% Mo, 0.5% Cu, rare earth element La accounting for 0.02%, 1.0% Si, 1% Fe, 2% Nb, 1% Al, 2% Ti and 0.05% C, the balance being Ni. Melting is carried out in a vacuum induction furnace. The technological process is: batching and charging→smelting period→refining period→alloying period→pouring.

[0023] Step two wire preparation

[0024] Alloy welding wire is prepared according to the following process:

[0025] Forging→rolling annealing→pickling→grinding→drawing→dehydrogenation annealing

[0026] Put the smelte...

Embodiment 2

[0030] Embodiment 2 of the present invention provides an anti-corrosion alloy powder for plasma spray welding of boiler water walls in waste incineration power plants

[0031] Step 1 alloy melting

[0032] In terms of mass percentage, the composition of the alloy material is selected to include Cr: 43%, Mo: 9%, Cu: 2.6%, Si: 1.0%, Fe: 2.0%, Nb: 1%, Al: 0.5%, Ti: 0.5%, rare earth elements Ce: 4.6%, C: 0.02%, and Ni as the balance, smelting with vacuum induction furnace or manual electric arc furnace or consumable vacuum electric arc furnace or non-electric arc furnace. Argon or nitrogen protection is required during melting.

[0033] Step 2 Milling

[0034] The alloy in molten state is atomized by water atomization or gas atomization. Adjust the flow and pressure of atomized water or atomized gas during atomization to control the particle size and uniformity of the powder;

[0035] Step 3 Powder particle size screening

[0036] Screen out the powder with a particle size ra...

Embodiment 3

[0039] Embodiment 3 of the present invention provides an alloy powder for thermal spraying and anticorrosion of boiler water walls in coal-fired power plants

[0040] Step 1 alloy melting

[0041] In terms of mass percentage, the chemical composition of the alloy material includes 43% Cr, 2.6% Cu, 1.0% Si, 2.0% Fe, 1% Nb, 1% Al, 0.5% Ti, 4.6% The rare earth element Ce, 0.02% C, and Ni in the balance are smelted in a vacuum induction furnace or a manual electric arc furnace or a consumable vacuum electric arc furnace or a non-electric arc furnace. Use argon or nitrogen protection during melting.

[0042] Step 2 Milling

[0043] The alloy in molten state is atomized by water atomization or gas atomization. Adjust the flow and pressure of atomized water or atomized gas during atomization to control the particle size and uniformity of the powder;

[0044] Step 3 Powder particle size screening

[0045] Screen the powder with a particle size ranging from 40 to 500 meshes from t...

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Abstract

The invention relates to the field of metal alloys, in particular to an alloy material resistant to high-temperature chlorine corrosion and an application method, and the alloy material comprises thefollowing components including, by mass percent, 30-45% of Cr, less than or equal to 3% of Cu, less than or equal to 2% of Ti, 0.01-5.00% of rare earth elements, less than or equal to 0.1% of C and the balance Ni. The corrosion-resistant alloy with the optimal comprehensive corrosion-resistant effect is formed by utilizing the interaction among the alloy components Ni, Cr, Cu and Ti and the corrosion resistance of the alloy components on high-temperature chlorine gas and chloride gas in an oxidizing medium and a reducing medium; meanwhile, the thickness of a coating formed by the alloy material can be easily controlled within a required range, the hardness of the coating processed by the provided corrosion-resistant alloy material is higher than that of an original base material, the wearresistance of a heated surface is improved, processing and manufacturing of equipment are not influenced, and the thermal expansion and cold contraction of the heated surface in an operation state arenot influenced; and the stress of heated surface equipment is not increased.

Description

[technical field] [0001] The invention relates to the field of metal alloys, in particular to an alloy material resistant to high-temperature chlorine corrosion and an application method. [Background technique] [0002] The annual discharge of solid waste in the world exceeds 10 billion tons. With the development of industry and the growth of population, the discharge of solid waste is still increasing year by year. Solid waste will have a bad impact on the environment, and how to dispose of it is an important issue in global environmental protection. The main technologies for disposal of waste include landfill and incineration. Waste incineration can not only achieve harmless and high-level reduction treatment, but also realize the resource utilization of waste and provide green power for cities. Therefore, cities around the world have built waste incineration power plants in recent years, and hundreds or even thousands of power plants will be built and put into operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05B22F1/00B22F9/08B23K35/30
CPCB22F1/0003B22F9/082B23K35/304B23K35/3086C22C19/052C22C19/058
Inventor 杨少民
Owner SHANGHAI FINEWAY ENERGY ENG
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