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Preparation method for TiCN-Al2O3 ceramic composite coating

A ceramic composite, ticn-al2o3 technology, applied in the coating, metal material coating process, fusion spraying, etc., can solve the problems of poor structure and performance stability, and achieve low cost, low wear, and broad application prospects Effect

Active Publication Date: 2018-02-02
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention utilizes Al which is stable at high temperature and has strong oxidation resistance 2 o 3 As the second phase particles, the particles are dispersed around the TiCN particles, and a TiCN-Al 2 o 3 Ceramic composite coating, so as to overcome the shortcomings of single TiCN ceramic coating under high speed and high load, poor structure and performance stability, so that the composite ceramic coating can be used for wear under high speed and high load conditions

Method used

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  • Preparation method for TiCN-Al2O3 ceramic composite coating
  • Preparation method for TiCN-Al2O3 ceramic composite coating
  • Preparation method for TiCN-Al2O3 ceramic composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, TiCN-Al was prepared by reactive plasma spraying process on the surface of 45# steel matrix sample 2 o 3 Ceramic composite coating, the main phase of the coating is TiC 0.7 N 0.3 , Al 2 o 3 Uniformly distributed in the layer gap or hole, crack area in the form of strips, which reduces the porosity of the coating and obtains a dense composite coating.

[0037] The preparation method of this coating is as follows:

[0038] (1) Put the 45# steel substrate sample into the TPS-1 pneumatic sandblasting machine, and perform surface roughening treatment by sandblasting to obtain a surface roughness Ra of 2.5-13.0 / μm. During the sandblasting process, the abrasive particles are sucked into the nozzle, accelerated in the high-pressure airflow, and sprayed onto the surface of the substrate to obtain a clean and rough surface and increase the bonding force between the substrate and the coating;

[0039] (2) Using the spray granulation method, the original Ti p...

Embodiment 2

[0047] In this example, TiCN-Al was prepared by reactive plasma spraying process on the surface of 45# steel matrix sample 2 o 3 Ceramic composite coating, the main phase of the prepared coating is TiC 0.7 N 0.3 , a small amount of Al 2 o 3 Distribute evenly in the coating in strips.

[0048] The preparation method of the coating is as follows:

[0049] Using a powder feeder, the spray feed composite powder containing two spherical agglomerated powders is sent into the plasma flame, and sprayed onto the surface of the bonding layer to obtain TiCN-Al 2 o 3 Ceramic composite coating, in which the spherical Al in the feed composite powder is sprayed 2 o 3 Agglomerated powder quality 20%, other steps are identical with example 1.

[0050] TiCN-Al prepared above 2 o 3 The SEM images of ceramic composite coatings are similar to figure 1 As shown, the structure of the coating is relatively dense, forming Al 2 o 3 gathering area.

[0051] TiCN-Al prepared above 2 o 3 ...

Embodiment 3

[0055] In this example, the reactive plasma spraying process was used to prepare TiCN-Al on the surface of the substrate sample. 2 o 3 Ceramic composite coating, the main phase of the prepared coating is TiC 0.7 N 0.3 and Al 2 o 3 , a large amount of Al 2 o 3 aggregate to form a brittle zone.

[0056] The preparation method of the coating is as follows:

[0057] Using a powder feeder, the spray feed composite powder containing two spherical agglomerated powders is sent into the plasma flame, and sprayed onto the surface of the bonding layer to obtain TiCN-Al 2 o 3 Ceramic composite coating, in which the spherical Al in the feed composite powder is sprayed 2 o 3 Agglomerated powder quality 30%, other steps are identical with example 1.

[0058] TiCN-Al prepared above 2 o 3 The SEM images of ceramic composite coatings are similar to figure 1 As shown, the structure of the coating becomes loose, and there is a large amount of Al 2 o 3 gathering area.

[0059] TiC...

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Abstract

The invention provides a preparation method for a TiCN-Al2O3 ceramic composite coating. The method comprises the following steps that 1, a base body sample is subjected to surface roughening treatment; 2, Ti-C composite powder and Al2O3 powder are mechanically stirred and mixed to obtain spray feeding composite powder; 3, the surface of a base body is pre-sprayed with self-melting alloy powder ofNi-10%wtAl to obtain a bonding bottom layer with the thickness 90-120 [mu]m; and 4, the surface of the bonding bottom layer is sprayed with the spray feeding composite powder to obtain the TiCN-Al2O3composite coating with the thickness 300-500 [mu]m. The plasma-sprayed TiCN-Al2O3 ceramic composite coating has excellent performance of high hardness and abrasion and corrosion resistance, is suitable for workpieces under the abrasion and corrosion working environment such as the fields of manufacturing of cars and machinery such as cutters, drill bits and molds, aerospace industry and the like,and has extremely wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of a sprayed coating, in particular to a plasma sprayed coating with high hardness and high wear resistance and a preparation method thereof. Background technique [0002] As a solid solution of TiN and TiC, TiCN is a ternary superhard ceramic material. It has high hardness of ceramic material (HV=2472kg / mm 2 ) With good chemical stability, excellent wear resistance and high temperature resistance, it has been widely used in many fields such as mechanical chemical industry, automobile manufacturing and aerospace. [0003] At present, surface treatment methods such as plasma-assisted vapor deposition (PACVD), chemical vapor deposition (CVD) and ion implantation are commonly used for TiCN coatings. Although these methods have made outstanding progress in preparing TiCN coatings, due to these methods There are disadvantages such as low deposition efficiency (2-10 μm / h), too thin film thickness (10-50 μm), po...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/10C23C4/02
CPCC23C4/02C23C4/10C23C4/134
Inventor 何继宁秦艳芳朱玲艳南召帅张建新
Owner HEBEI UNIV OF TECH
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