Preparation method of TC4/TiC laser cladding composite coating layer

A laser cladding and composite coating technology, which is applied in the field of preparation of TC4/TiC laser cladding composite coatings, can solve the problems of cladding coating instability, poor wear resistance and corrosion resistance, etc., and achieve improved coating Cracking, preventing coating cracking, avoiding the effect of pores

Inactive Publication Date: 2018-12-11
HUNAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly aims at the problems of unstable cladding coating in the prior art, poor wear resistance and corrosion resistance, and provides a TC4 / TiC laser cladding composite coating with simple process, green environmental protection, wear resistance and corrosion resistance. Preparation

Method used

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  • Preparation method of TC4/TiC laser cladding composite coating layer
  • Preparation method of TC4/TiC laser cladding composite coating layer
  • Preparation method of TC4/TiC laser cladding composite coating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 The preparation method of TC4 / TiC laser cladding composite coating specifically includes the following preparation steps:

[0044] S1. Pretreatment: use the pure titanium plate as the cladding substrate, polish the surface with 600-grit sandpaper for 30 minutes, and then wash it with 95% ethanol solution for 5 minutes to remove the oil and rust on the surface;

[0045]S2. Raw material preparation: After drying TiC powder with an average particle size of 50 μm and TC4 titanium alloy powder with an average particle size of 70 μm at 80° C. for 30 minutes, mix them uniformly at a mass ratio of 30:70 to form a mixed powder;

[0046] S3. Laser cladding: the mixed powder obtained in step S2 is fed into argon gas, and laser cladding is carried out on the surface of the substrate treated in step S1 by coaxial powder feeding with STAUBLTX90 type numerical control laser, and rapidly cooled at room temperature to form One layer of composite coating. Among them, the flow ...

Embodiment 2

[0049] Example 2 The preparation method of TC4 / TiC laser cladding composite coating specifically includes the following preparation steps:

[0050] S1. Pretreatment: use the pure titanium plate as the cladding substrate, polish the surface with 600-grit sandpaper for 30 minutes, and then wash it with 95% ethanol solution for 5 minutes to remove the oil and rust on the surface;

[0051] S2. Raw material preparation: After drying TiC powder with an average particle size of 50 μm and TC4 titanium alloy powder with an average particle size of 70 μm at 80° C. for 30 minutes, mix them uniformly at a mass ratio of 30:70 to form a mixed powder;

[0052] S3. Laser cladding: the mixed powder obtained in step S2 is fed into argon gas, and laser cladding is carried out on the surface of the substrate treated in step S1 by coaxial powder feeding with STAUBLTX90 type numerical control laser, and rapidly cooled at room temperature to form One layer of composite coating. Among them, the flow...

Embodiment 3

[0055] Example 3 The preparation method of TC4 / TiC laser cladding composite coating specifically includes the following preparation steps:

[0056] S1. Pretreatment: use the pure titanium plate as the cladding substrate, polish the surface with 600-grit sandpaper for 30 minutes, and then wash it with 95% ethanol solution for 5 minutes to remove the oil and rust on the surface;

[0057] S2. Raw material preparation: After drying TiC powder with an average particle size of 50 μm and TC4 titanium alloy powder with an average particle size of 70 μm at 80° C. for 30 minutes, mix them uniformly at a mass ratio of 30:70 to form a mixed powder;

[0058] S3. Laser cladding: the mixed powder obtained in step S2 is fed into argon gas, and laser cladding is carried out on the surface of the substrate treated in step S1 by coaxial powder feeding with STAUBLTX90 type numerical control laser, and rapidly cooled at room temperature to form One layer of composite coating. Among them, the flow...

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Abstract

The invention discloses a preparation method of a TC4/TiC laser cladding wear-resistant and corrosion-resistant composite coating layer. The TC4/TiC laser cladding wear-resistant and corrosion-resistant composite coating layer takes a pure titanium plate as a matrix and is prepared from the following components in parts by weight: 0-38 parts of TiC powder and 65-75 parts of TC4 titanium alloy powder. The preparation method comprises the following steps of after cleaning the surface of the matrix through pretreatment, cladding the surface of the matrix with mixed powder in a manner of coaxial powder sending laser cladding, and performing rapid cooling to form a wear-resistant and corrosion-resistant composite coating layer under the condition of room temperature. The preparation method provided by the invention is simple in technology, greatly saves the raw materials, lowers the cost and is accurate in each preparation link and liable to control each preparation link; and the prepared composite coating layer is stable in performance and uniform and reliable in quality as well as is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing, and more specifically, to a preparation method of a TC4 / TiC laser cladding composite coating. Background technique [0002] Wear is one of the more common ways metal mechanical parts fail. According to statistics, modern industry urgently needs parts that can work effectively under harsh wear conditions, high temperature, high-speed friction and wear, etc. [0003] As a commonly used technology in emerging parts processing and surface modification technology, laser cladding technology has low dilution rate, small heat-affected zone, metallurgical bonding with the base surface, small distortion and deformation of cladding parts, and easy process Realize the advantages of automation, and at the same time, the application of laser cladding technology to surface treatment can greatly improve the mechanical properties such as hardness, wear resistance, corrosion resistance, and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C14/00C22C32/00
CPCC22C14/00C22C32/0052C23C24/103
Inventor 阳建君覃喆华范才河王银程畅栋吴艳辉孙斌欧玲蹇海根张楠
Owner HUNAN UNIV OF TECH
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