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A kind of laser cladding composite powder and its application

A technology of laser cladding and composite powder, which is applied in the directions of fusion spraying, superimposed layer plating, coating, etc. It can solve the problems of unstable process parameters, inability to obtain coatings, single surface treatment methods, etc., and achieve porosity. The effect of low, tightly bound, high microhardness and wear resistance

Active Publication Date: 2019-06-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, in order to improve the performance of Ti alloys and expand their scope of application, Ti alloys are generally cast and melted with alloying elements and surface treatment to regulate the microstructure to obtain excellent high-temperature oxidation resistance, high hardness, and high wear resistance. Surface treatment has It has the characteristics of good economic performance, convenient processing and excellent surface coating performance. The most commonly used surface processing methods are generally laser cladding, electroplating, thermal spraying, plasma spraying, physical and chemical deposition, etc., through the relevant patents and papers of surface processing methods According to the research, the current surface treatment method is single and the process parameters are unstable, so it is impossible to obtain a coating with excellent comprehensive performance

Method used

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  • A kind of laser cladding composite powder and its application
  • A kind of laser cladding composite powder and its application
  • A kind of laser cladding composite powder and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: The laser cladding composite powder in this example is TiO 2 , SiO 2 、Al 2 o 3 、TiB 2 , Co, Sn, La, Ce mixture, wherein the mass percentage of each component is TiO 2 40%, SiO 2 12%, Al 2 o 3 18%, TiB 2 21%, Co 8%, Sn0.1%, La 0.7%, Ce 0.2%;

[0031] The method for applying laser cladding composite powder in the preparation of titanium-aluminum alloy surface wear-resistant coating, the specific steps are as follows:

[0032] (1) Finely grind the laser cladding composite powder to a particle size of 180 mesh, add a binder (the binder is a mixture of absolute ethanol and liquid polyvinyl alcohol) and mix evenly, and then press it into a 30mm×4mm×2mm Strips, dried to obtain prefabricated layers;

[0033] (2) Grinding the surface of TC4 with a size of 40mm×10mm×6mm to remove impurities such as surface oxides;

[0034] (3) Place the prefabricated layer obtained in step (1) on the base material obtained in step (2), preheat for 0.5h in vacuum at 350°C...

Embodiment 2

[0039] Embodiment 2: The laser cladding composite powder of this embodiment is TiO 2 , SiO 2 、Al 2 o 3 、TiB 2 , Co, Sn, La, Ce mixture, wherein the mass percentage of each component is TiO2 41%, SiO 2 14%, Al 2 o 3 17%, TiB 2 17%, Co 9.1%, Sn0.1%, La 1%, Ce 0.8%;

[0040] The method for applying laser cladding composite powder in the preparation of titanium-aluminum alloy surface wear-resistant coating, the specific steps are as follows:

[0041] (1) Finely grind the laser cladding composite powder to a particle size of 160 mesh, add a binder (the binder is a mixture of absolute ethanol and liquid polyvinyl alcohol) and mix evenly, and then press it into a 30mm×4mm×2mm Strips, dried to obtain prefabricated layers;

[0042] (2) Grinding the surface of TC4 with a size of 40mm×10mm×6mm to remove impurities such as surface oxides;

[0043] (3) Place the prefabricated layer obtained in step (1) on the base material obtained in step (2), preheat for 2.0 hours in vacuum...

Embodiment 3

[0048] Embodiment 3: The laser cladding composite powder of this embodiment is TiO 2 , SiO 2 、Al 2 o 3 、TiB 2 , Co, Sn, La, Ce mixture, wherein the mass percentage of each component TiO 2 40.5%, SiO 2 12.5%, Al 2 o 3 18%, TiB 2 16%, Co 9%, Sn2%, La 1%, Ce 1%;

[0049] The method for applying laser cladding composite powder in the preparation of titanium-aluminum alloy surface wear-resistant coating, the specific steps are as follows:

[0050] (1) Finely grind the laser cladding composite powder to a particle size of 150 mesh, add a binder (the binder is a mixture of absolute ethanol and liquid polyvinyl alcohol) and mix evenly, and then press it into a 30mm×4mm×2mm Strips, dried to obtain prefabricated layers;

[0051] (2) Grinding the surface of TC4 with a size of 40mm×10mm×6mm to remove impurities such as surface oxides;

[0052] (3) Place the prefabricated layer obtained in step (1) on the substrate obtained in step (2), preheat for 1.0 h under vacuum at 310°...

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Abstract

The invention relates to laser cladding composite powder and application, and belongs to the technical field of laser cladding. The laser cladding composite powder is a mixture of TiO2, SiO2, Al2O3, TiB2, Co, Sn, La and Ce, wherein all the components comprise the following mass percentages: 39-42% of TiO2, 11-15% of SiO2, 17-20% of Al2O3, 16-21% of TiB2, 6-9.7% of Co, and the balance of Sn, La and Ce. The laser cladding composite powder can preferably reduce cracks caused by thermal expansion coefficients, has the characteristic of high hardness, and can be applied to preparation of a wear resistant coating layer on the surface of a titanium aluminum alloy.

Description

technical field [0001] The invention relates to a laser cladding composite powder and its application, belonging to the technical field of laser cladding. Background technique [0002] Ti alloys have the advantages of high specific stiffness and high specific strength, and are especially widely used in the automotive industry and aerospace industry. Among them, in order to improve the performance of Ti alloys and expand their scope of application, Ti alloys are generally cast and melted with alloying elements and surface treatment to regulate the microstructure to obtain excellent high-temperature oxidation resistance, high hardness, and high wear resistance. Surface treatment has It has the characteristics of good economic performance, convenient processing and excellent surface coating performance. The most commonly used surface processing methods are generally laser cladding, electroplating, thermal spraying, plasma spraying, physical and chemical deposition, etc., throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C23C4/129C23C4/06C23C4/18C23C28/02
CPCC23C4/06C23C4/18C23C24/103C23C28/027
Inventor 刘洪喜刘子峰穆永坤张晓伟王悦怡
Owner KUNMING UNIV OF SCI & TECH