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Composite coating of ceramic-metal compound and its prepn

A technology of intermetallic compound and composite coating, which is applied in the field of coating and its preparation process, ceramic-intermetallic compound composite coating and its preparation, and can solve the problems of prone to cracks, coating cracking, peeling, low production efficiency, etc. problem, achieve the effect of reducing deformation, reducing input energy and improving efficiency

Inactive Publication Date: 2006-03-01
崔洪芝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned processes have disadvantages
The main disadvantages of surfacing welding are: low bonding strength of the coating, prone to cracks, and the coating often cracks and peels off during use; the main disadvantages of laser cladding are: there are problems such as large equipment investment, low production efficiency, and high processing costs
Therefore, the above shortcomings limit the large-scale industrial application of surfacing welding and laser surface treatment technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1—TiB is formed in the middle groove of the scraper conveyor 2 +Al 2 o 3 +FeAl+Fe 3 Al ceramic-intermetallic composite coating.

[0042] When the middle groove of the scraper conveyor used in coal mine works, the surface is worn by the reciprocating movement of the scraper. Moreover, the working surface is subjected to severe abrasive wear with hard particles as abrasives under large contact stress, especially the chain part, which often wears out and has a service life of only 3-6 months. The surface is treated by plasma-assisted in-situ reaction technology, the specific process is as follows: preparation of Fe-Al-TiO 2 -B 2 o 3 Department of powder, Fe, Al, TiO 2 The particle size is 150-200 mesh, B 2 o 3 The particle size is 100-150 mesh, and its powder preparation ratio is as follows: 1) prepare Fe, Al powder according to the ratio of Fe:Al=4:1; 2) Al, TiO 2 、B 2 o 3 The three follow the reaction formula: Preparation; 3) weigh again accordi...

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Abstract

The present invention is composite coating of ceramic-metal compound and its preparation process. The preparation process includes the following five steps: preparing heat reaction powder, preparing, preparing, turning off all switches and arranging the processed workpieces. The heat reaction powder is one Fe-Al-TiO2-B2O3 system comprising Fe powder, Al powder and TiO2 powder of 150-200 mesh fineness as well as B2O3 powder of 100-150 mesh fineness. Under the action of plasma heat excitation and the auxiliary action, the powder system takes chemical reaction in plasma flow to form metal phase and intermetallic compound phase on the surface of the workpiece to combine metallurgically with the substrate surface in micro melting state. The coating may have regulated hardness and controlled thickness, and the process has less deformation of workpiece and high efficiency.

Description

technical field [0001] The present invention relates to a kind of coating and its preparation process, especially refers to the composite coating of ceramic-intermetallic compound and its preparation process, more specifically, the present invention relates to a kind of TiB 2 +Al 2 o 3 +FeAl+Fe 3 The invention relates to an Al ceramic-intermetallic compound composite coating and a preparation process thereof, belonging to the field of material synthesis and processing. In the International Patent Classification, the present invention should be classified into division C23. Background technique [0002] In mining, metallurgy, energy and other fields, there are a large number of workpieces under severe wear conditions, such as the chain part of the middle groove of the mining scraper conveyor, the turning point of the bottom surface of the loader hopper, the front surface of the excavator bucket, etc. , due to serious wear and tear, it needs to be disassembled and replaced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23D5/02C23D7/00C23D9/00
Inventor 崔洪芝
Owner 崔洪芝
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