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Method for combustion synthesis of aluminum oxide ceramic-metal composite coating on surface of carbon steel

An alumina ceramic and metal composite technology is applied in the field of surface strengthening of professional materials in material processing engineering. It can solve the problems of low bonding strength and restrict the application of high-temperature self-propagating synthetic ceramic coatings, and achieve low porosity, dense structure and wear resistance. good performance

Inactive Publication Date: 2013-03-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional surface techniques are not suitable for preparing Al with a thickness of 3-12mm on the surface of metal parts. 2 o 3 Ceramic / Metal Composite Coating
Self-propagating high-temperature synthesis can not only synthesize the required ceramic materials, but also directly prepare coatings, but the current successful application is limited to the preparation of ceramic-lined steel pipes. There is a big difference. The self-propagating synthetic ceramic coating is mainly mechanically bonded to the steel substrate, and the bonding strength is low, which seriously restricts the application of high-temperature self-propagating synthetic ceramic coatings.

Method used

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  • Method for combustion synthesis of aluminum oxide ceramic-metal composite coating on surface of carbon steel
  • Method for combustion synthesis of aluminum oxide ceramic-metal composite coating on surface of carbon steel
  • Method for combustion synthesis of aluminum oxide ceramic-metal composite coating on surface of carbon steel

Examples

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Effect test

Embodiment 1

[0026] Example 1: A method for burning and synthesizing an alumina ceramic-metal composite coating on the surface of carbon steel. The synthesis method is as follows:

[0027] (1) Choose a Q235 carbon steel substrate with a length×width×height (thickness) of 50mm×25mm×4mm, and use sandblasting to remove the oxide scale on the surface of the carbon steel matrix to make the carbon steel matrix look metallic;

[0028] (2) Percentage of mole Weigh 60.00% NiO and 40.00% Al transition layer powder, and wet-mix it with alcohol for 5 hours in a ball mill, uniformly, into a paste, and set aside;

[0029] (3) The percentage of massage weight is 67.74% Al and 19.35% Fe 2 O 3 , 12.90%Cr 2 O 3 The working layer powder is wet-mixed with alcohol in a ball mill for 5 hours, evenly, into a paste, set aside;

[0030] (4) Brush the paste-like transition layer powder obtained in step (2) on the surface of the carbon steel substrate with a thickness of 2mm, and then apply the paste-like working layer powde...

Embodiment 2

[0043] Embodiment 2: A method for burning and synthesizing an alumina ceramic-metal composite coating on the surface of carbon steel, the synthesis method is as follows:

[0044] (1) Choose a Q235 carbon steel substrate with a length×width×height (thickness) of 50mm×25mm×4mm, and use sandblasting to remove the oxide scale on the surface of the carbon steel matrix to make the carbon steel matrix look metallic;

[0045] (2) Percentage of mole Weigh 54.55% NiO and 45.45% Al transition layer powder, and wet-mix it with alcohol in a ball mill for 5 hours, uniformly, into a paste, and set aside;

[0046] (3) The percentage of massage weight is 67.74% Al, 22.58% Fe 2 O 3 , 9.68%Cr 2 O 3 The working layer powder is wet-mixed with alcohol in a ball mill for 5 hours, evenly, into a paste, set aside;

[0047] (4) Brush the paste-like transition layer powder in step (2) on the surface of the carbon steel substrate with a thickness of 1mm, and then apply the paste-like working layer powder in step ...

Embodiment 3

[0052] Embodiment 3: A method for burning and synthesizing an alumina ceramic-metal composite coating on the surface of carbon steel, the synthesis method is as follows:

[0053] (1) Choose a Q235 carbon steel substrate with a length×width×height (thickness) of 50mm×25mm×4mm, and use sandblasting to remove the oxide scale on the surface of the carbon steel matrix to make the carbon steel matrix look metallic;

[0054] (2) Moer percentage Weigh out the transition layer powder of 50.00% NiO and 50.00% Al, and wet-mix it with alcohol for 5 hours in a ball mill, uniformly, into a paste, and set aside;

[0055] (3) The percentage of massage weight is 71.43% Al, 17.14% Fe 2 O 3 , 11.43%Cr 2 O 3 The working layer powder is wet-mixed with alcohol in a ball mill for 5 hours, evenly, into a paste, set aside;

[0056] (4) Brush the paste transition layer powder in step (2) on the surface of the carbon steel substrate with a thickness of 3mm, and then apply the paste working layer powder in step (...

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Abstract

The invention relates to a method for combustion synthesis of an aluminum oxide ceramic-metal composite coating on the surface of carbon steel. The method comprises the following steps: sandblasting and removing surface scale of a carbon steel substrate; successively coating powder of a transitional layer and a working layer with a certain thickness and composition proportion on the surface of the carbon steel substrate; insulating a magnesium rod; then, placing the coated carbon steel sample in a crucible; paving quartz sand around; and finally placing the crucible in a well heating furnace and heating to a certain temperature, and igniting the magnesium rod to react. The aluminum oxide ceramic-metal composite coating on the surface of carbon steel formed by combustion synthesis provided by the invention is level in surface and low in porosity. The microhardness reaches 1200-2450HV0.2, the diffusion distance from the coating to elements at a carbon steel substrate interface reaches 30 microns, metallurgical bonding is formed, and the bonding performance is excellent. The coating has an excellent anti-wear performance and corrosion resistance. The method provided by the invention can be widely applied to preparing a large area corrosion-resisting and anti-wear coating of the carbon steel substrate, and the long-acting corrosion-resisting and anti-wear performance of a mechanical part can be remarkably improved.

Description

Technical field [0001] The invention relates to a method for burning and synthesizing an alumina ceramic-metal composite coating on the surface of carbon steel, and belongs to the field of material surface strengthening for material processing engineering. It is mainly used to prepare wear-resistant and corrosion-resistant coatings on the surface of metal parts and can be used in construction machinery, mining machinery and other fields. Background technique [0002] A large number of metal parts such as construction machinery and mining machinery are subject to severe abrasive wear, and the maintenance workload is heavy and the loss is serious. Al 2 O 3 Ceramic has excellent wear resistance. A layer of Al is prepared on the surface of metal parts 2 O 3 Ceramic / metal wear-resistant composite coating can greatly extend the service life of metal parts. However, traditional surface technology is not suitable for preparing Al with a thickness of 3-12mm on the surface of metal parts....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 王泽华薛小锋周泽华江少群王长浩程江波王刚
Owner HOHAI UNIV
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