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Ni-BASED THERMAL SPRAYING ALLOY POWDER AND METHOD FOR MANUFACTURING ALLOY COATING

A technology of alloy powder and manufacturing method, which is applied in the direction of coating, melt spraying, metal material coating process, etc., to achieve the effect of prolonging life

Active Publication Date: 2019-10-15
EBARA ENVIRONMENTAL PLANT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, conventional Ni-based self-fluxing alloys cannot be said to have sufficient environmental resistance against corrosion and wear (erosion corrosion), which occurs simultaneously.

Method used

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  • Ni-BASED THERMAL SPRAYING ALLOY POWDER AND METHOD FOR MANUFACTURING ALLOY COATING
  • Ni-BASED THERMAL SPRAYING ALLOY POWDER AND METHOD FOR MANUFACTURING ALLOY COATING
  • Ni-BASED THERMAL SPRAYING ALLOY POWDER AND METHOD FOR MANUFACTURING ALLOY COATING

Examples

Experimental program
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Effect test

Embodiment

[0063] figure 1 Here, the structure of the small fluidized bed test device used in this example will be briefly described.

[0064] The fluidized bed test device 1 includes a vessel 2 that forms a fluidized bed 4 based on a fluidized medium, and an electric furnace 3 provided on the outer periphery of the vessel 2. At the bottom of the container 2 is provided a glass filter 5 that holds a fluidizing medium and supplies flowing air. A test piece holder (water-cooled copper block) 7 that holds the test piece S inside or above the fluidized bed 4 is provided on the test section 6 in the upper part of the container 2. A cooling water pipe 8 for supplying cooling water is connected to the test piece holder 7.

[0065] The test piece S was installed in the test piece holder 7 of the fluidized bed test apparatus 1, and the atmosphere gas and the fluidizing medium in the container 2 were kept at 700°C by external heating by the electric furnace 3. The test piece holder 7 was supplied By ...

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Abstract

Provided are an Ni-based thermal spraying alloy powder having exceptional corrosion resistance and corrosion wear resistance even in environments in which the Ni-based thermal spraying alloy powder issubjected to corrosion or simultaneously subjected to corrosion and wear, and a method for manufacturing an alloy coating. This Ni-based thermal spraying alloy powder is characterized by comprising 15-25 wt% of Cr, 0-5 wt% of Mo, 0.5 wt% or more to less than 2 wt% of Si, 5 wt% or less of Fe, 0.3-0.7 wt% of C, and 4-7 wt% of B, with the remainder comprising Ni and unavoidable impurities.

Description

Technical field [0001] The present invention relates to a Ni-based sprayed alloy powder and a method for manufacturing an alloy coating, in particular to a Ni-based sprayed alloy powder and a method for manufacturing an alloy coating that can form an alloy coating with excellent environmental resistance in a high-temperature environment where corrosion and corrosion wear become a problem. Background technique [0002] In incinerators for waste and biomass, a severe high-temperature corrosive environment is formed due to the chlorine contained in the fuel. In particular, on the surface of the heat exchanger whose temperature is lower than the temperature of the atmosphere, the chloride contained in the atmosphere is concentrated and accumulated, thereby causing severe corrosion. In addition, in the case of a fluidized bed boiler, in addition to corrosion, serious damage sometimes occurs under the action of abrasion caused by the fluidized medium. As a countermeasure against the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
CPCC22C19/05C23C4/08C23C4/18C23C4/06C22C19/056C22C19/055C22C1/0433B22F7/04C23C4/067
Inventor 林重成默罕默德·埃玛米野口学石川荣司田中瑛智高崎伸公古吟孝
Owner EBARA ENVIRONMENTAL PLANT