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Large-area TiB-TiC reinforced titanium-based composite coating and preparation method thereof

A composite coating and large-area technology, applied in the direction of heating inorganic powder coating, etc., can solve the problems of easily polluting the surface of the substrate, affecting the fusion of the substrate and the coating, and achieve the effect of reducing the tendency of crack formation and improving wear resistance

Active Publication Date: 2011-04-13
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has such problems as: the binder of the coating is decomposed by heat during the cladding process, and a certain amount of gas will be generated. During the rapid solidification of the cladding layer, it is easy to stay in the interior of the coating to form pores; The binder is mostly organic matter, and the gas decomposed by heat is easy to contaminate the surface of the substrate and affect the fusion of the substrate and the coating

Method used

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  • Large-area TiB-TiC reinforced titanium-based composite coating and preparation method thereof
  • Large-area TiB-TiC reinforced titanium-based composite coating and preparation method thereof
  • Large-area TiB-TiC reinforced titanium-based composite coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] A large-area TiB-TiC reinforced titanium-based composite coating, the composition (weight %) of the components required to prepare the coating is 83% Ti, 7% B 4 C, 4% Al, 3% Nano TiC, 3% Y 2 o 3 .

[0045] The preparation process of the above-mentioned large-area TiB-TiC reinforced titanium-based composite coating includes the following steps:

[0046] (1) Ti, B 4 C, nano TiC and rare earth oxide powder Y 2 o 3 The precursor is uniformly mixed through a ball mill;

[0047] (2) On the surface of the Ti6Al4V substrate, a layer of adhesive is brushed to increase the bonding strength between the pre-coating layer and the substrate;

[0048] (3) A certain amount of mixed powder is evenly placed on the surface of Ti6Al4V coated with binder, and then the mixed powder is densified and the surface is smoothed by a pressure of 5 MPa to obtain a pre-coating layer with a thickness of about 0.8 mm.

[0049](4) For the above-mentioned pre-assembled coating, a light source with...

Embodiment 2

[0054] A large-area TiB-TiC reinforced titanium-based composite coating, the composition (weight %) of the components required to prepare the coating is 86% Ti, 5% B 4 C, 2% Al, 2% Nano TiC, 5% La 2 o 3 .

[0055] The preparation process of the above-mentioned large-area TiB-TiC reinforced titanium-based composite coating includes the following steps:

[0056] (1) Ti, B 4 C, nano TiC and rare earth oxide powder La 2 o 3 The precursor is uniformly mixed through a ball mill;

[0057] (2) On the surface of the Ti6Al4V substrate, a layer of adhesive is brushed to increase the bonding strength between the pre-coating layer and the substrate;

[0058] (3) A certain amount of mixed powder is evenly placed on the surface of Ti6Al4V coated with binder, and then the mixed powder is densified and the surface is smoothed by a pressure of 5 MPa to obtain a pre-coating layer with a thickness of about 0.8 mm.

[0059] (4) For the above-mentioned pre-assembled coating, a light source w...

Embodiment 3

[0063] A large-area TiB-TiC reinforced titanium-based composite coating, the composition (weight %) of the components required to prepare the coating is 86% Ti, 5% B 4 C, 2% Al, 2% Nano TiC, 5% Nd 2 o 3 .

[0064] The preparation process of the above-mentioned large-area TiB-TiC reinforced titanium-based composite coating includes the following steps:

[0065] (1) Ti, B 4 C, nano TiC and rare earth oxide powder Nd 2 o 3 The precursor is uniformly mixed through a ball mill;

[0066] (2) On the surface of the Ti6Al4V substrate, a layer of adhesive is brushed to increase the bonding strength between the pre-coating layer and the substrate;

[0067] (3) Place a certain amount of mixed powder evenly on the surface of Ti6Al4V coated with binder, and then use a pressure of 5 MPa to densify the mixed powder and smooth the surface to obtain a pre-coating layer with a thickness of about 0.8mm

[0068] (4) For the above-mentioned pre-assembled coating, a light source with a power ...

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Abstract

The invention discloses a large-area TiB-TiC reinforced titanium-based composite coating prepared from the following components in percentage by weight: 83-88 percent of Ti, 5-7 percent of B4C, 2-4 percent of Al, 1-3 percent of nano TiC and 3-5 percent of rare-earth oxide. The invention adopts a new method for preparing a pre-coating layer which has the advantages of smooth surface, controllable thickness, less adhesive and relatively simple process. In addition, the invention optimally selects the proportioning of a cladding material system so that the coating after cladding has reinforcing phases of TiB and TiC; in addition, since a base body and a base body material Ti6Al4V are both titanium alloy, the coating and the base body have favorable physical compatibility. The invention also remarkably lowers the intensity degree of reaction for generating TiB and TiC by adding a little amount of thinner nanoTiC.

Description

technical field [0001] The invention discloses a titanium-based composite coating, specifically a large-area TiB-TiC reinforced titanium-based composite coating, and a preparation method of the composite coating. Background technique [0002] Titanium alloy Ti6A+4V has the advantages of low density, high specific strength, excellent corrosion resistance, good heat resistance, etc., and has been widely used in the fields of aerospace, automobile, shipbuilding and chemical equipment manufacturing. However, titanium alloys have the disadvantages of low hardness and poor wear resistance, which directly affect the working performance and service life of the engine. Therefore, it is particularly important to carry out proper surface treatment of titanium alloys used for friction components (such as inner bushings, piston rods, etc.) on the engine. [0003] Traditional titanium alloy surface modification technologies mainly include: surface carburizing, thermal spraying, ion impla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08
Inventor 李军曾习斐顾盛龙林清碧胡寅冬
Owner SHANGHAI UNIV OF ENG SCI
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