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Method for using braze welding material as corrosion-resistant coat

A technology of anti-corrosion coating and brazing material, applied in the direction of metal material coating process, coating, welding/cutting medium/material, etc. effect and other issues, to meet the needs of anti-corrosion, improve corrosion resistance, and reduce porosity

Active Publication Date: 2009-06-24
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many methods for anticorrosion of easily corroded steel parts, such as: painting, electroplating, thermal spraying, etc. The temperature resistance of these coatings is only below 700°C. For occasions that require higher temperature resistance, for example, some parts need to be treated later During the welding process, the temperature reaches about 1000°C, the coating of the above-mentioned paint will be destroyed, and the protective effect cannot be achieved.
For parts with an ambient temperature above 700°C, such as high-temperature parts of the engine, there is currently no anti-corrosion coating that meets the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1. Use UNICOAT's plasma spraying equipment.

[0037] The spraying process parameters are: nozzle diameter: φ6mm; gas parameters; the main gas is argon, the main gas pressure is 3Bar, the main gas flow rate is 30L / min; the secondary gas parameters; the secondary gas is hydrogen, the secondary gas pressure is 3Bar, the secondary gas flow rate is 3 L / min; carrier gas flow rate 3 l / min; working current 700 ampere; working voltage 90 volts; powder feeding rate 30 g / min; spraying distance 120mm; 10 minutes; after spraying, put the sprayed metal parts into the heating furnace, Raise the temperature to 950°C, keep it warm for 2 hours, and cool it to room temperature.

Embodiment 2

[0038] Example 2. Use UNICOAT's plasma spraying equipment.

[0039] The spraying process parameters are: nozzle diameter: φ7mm; gas parameters; the main gas is argon, the main gas pressure is 4Bar, the main gas flow rate is 40L / min; the secondary gas parameters; the secondary gas is hydrogen, the secondary gas pressure is 4Bar, and the secondary gas flow rate is 4 L / min; carrier gas flow rate 4 liters / min; working current 600 amps; working voltage 80 volts; powder feeding rate 40 g / min; spraying distance 130mm; 15 minutes; after spraying, put the sprayed metal parts into the heating furnace, Raise the temperature to 1000°C, keep the temperature for 1.5 hours, and cool it to room temperature.

Embodiment 3

[0040] Example 3. Use UNICOAT's plasma spraying equipment.

[0041] The spraying process parameters are: nozzle diameter: φ9mm; gas parameters; the main gas is argon, the main gas pressure is 5Bar, the main gas flow rate is 50 liters / min; the secondary gas parameters; the secondary gas is hydrogen, the secondary gas pressure is 5Bar, and the secondary gas flow rate is 5 L / min; carrier gas flow rate 5 l / min; working current 500 amps; working voltage 60 volts; powder feeding rate 50 g / min; spraying distance 140mm; 20 minutes; after spraying, put the sprayed metal parts into the heating furnace, The temperature is raised to 1050°C, the temperature is kept for 1 hour, and the furnace is air-cooled to room temperature.

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Abstract

The present invention belongs to the field of anticorrosion treatment technology, and is especially method of using brazing material to form anticorrosive coating. The present invention features that brazing material Ni82CrBSi is first hot sprayed to the surface of metal member and then molten to form one anticorrosive coating. The method of the present invention can raise the anticorrosion performance of member at high temperature greatly, and is simple. The coating formed through melting the sprayed material has low porosity, high bonding strength and high anticorrosion performance.

Description

Technical field [0001] The invention belongs to the anti-corrosion treatment technology, and relates to a method for using brazing material as a corrosion-resistant coating. Background technique [0002] There are many methods for anti-corrosion of corrosion-prone steel parts, such as painting, electroplating, thermal spraying, etc. The temperature resistance of these coatings is only below 700℃. For occasions that require higher temperature resistance, for example, some parts need to be processed later. During the welding process, when the temperature reaches about 1000°C, the coating of the above-mentioned paint will be destroyed, and the protective effect will not be achieved. For parts whose operating environment temperature is above 700°C, such as high-temperature parts of engines, there is currently no anticorrosive coating that meets the requirements. Summary of the invention [0003] The purpose of the present invention is to propose a method for using brazing material a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/02C23C4/18B23K35/24C23C4/134
Inventor 马凌宵滕瑞
Owner AECC AVIATION POWER CO LTD
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