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Materials for laser cladding on titanium alloy surfaces and laser cladding method

A laser cladding, titanium alloy technology, applied in the field of material surface strengthening, can solve the problems of nickel-based coatings with many pores, cracks, and high production costs, and achieve enhanced microhardness and wear resistance, strong applicability, and shortened production. effect of cycles

Inactive Publication Date: 2015-11-18
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the alloy systems for laser cladding on the surface of titanium alloys are mainly nickel-based and cobalt-based. Since cobalt-based and nickel-based materials are strategic materials for national defense, their production costs are high, and nickel-based coatings have many defects such as pores and cracks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] On the surface of a rectangular TA2 titanium alloy with a length of 30mm, a width of 10mm, and a thickness of 9mm, Fe with a mass fraction of 72% 3 Al powder and TiC-TiB with a mass fraction of 28% 2 Ceramic hard phase mixed powder laser cladding on the surface of titanium alloy, the Fe 3 The particle size of Al powder is 10-300 mesh, TiC-TiB 2 The particle size of the powder is 10-300 mesh, and the TiC-TiB 2 TiC and TiB in ceramic hard phase 2 The mass fraction ratio can be any ratio, but TiC and TiB 2 The best quality score ratio is: 1:1.

[0023] The specific process steps are as follows:

[0024] (1) Before laser cladding, use No. 240 sandpaper to polish the surface of TA2 titanium alloy to be laser clad to make the surface roughness reach Ra2.5μm; then clean the surface to be laser clad with 10% sulfuric acid aqueous solution by volume , The pickling time is 5-10 minutes; after pickling, rinse with water, wipe the surface of the workpiece to be melted with al...

Embodiment 2

[0031] On the surface of a rectangular TA2 titanium alloy with a length of 30mm, a width of 10mm, and a thickness of 9mm, Fe with a mass fraction of 63% 3 Al powder and TiC-TiB with a mass fraction of 37% 2 Ceramic hard phase mixed powder laser cladding on the surface of titanium alloy, the Fe 3 The particle size of Al powder is 10-300 mesh, TiC-TiB 2 The particle size of the powder is 10-300 mesh, and the TiC-TiB 2 TiC and TiB in ceramic hard phase 2 The mass fraction ratio can be any ratio, but TiC and TiB 2 The best quality score ratio is: 1:1.

[0032] The specific process steps are as follows:

[0033] (1) Before laser cladding, use No. 240 sandpaper to polish the surface of TA2 titanium alloy to be laser clad, so that the surface roughness reaches Ra1.6μm; then clean the surface to be laser clad with 10% sulfuric acid aqueous solution by volume , The pickling time is 5-10 minutes; after pickling, rinse with water, wipe the surface of the workpiece to be melted with a...

Embodiment 3

[0040] On the surface of a rectangular TA2 titanium alloy with a length of 30mm, a width of 10mm, and a thickness of 9mm, Fe with a mass fraction of 86% 3 Al powder and TiC-TiB with a mass fraction of 14% 2 Ceramic hard phase mixed powder laser cladding on the surface of titanium alloy, the Fe 3 The particle size of Al powder is 10-300 mesh, TiC-TiB 2 The particle size of the powder is 10-300 mesh, and the TiC-TiB 2 TiC and TiB in ceramic hard phase 2 The mass fraction ratio can be any ratio, but TiC and TiB 2 The best quality score ratio is: 1:1.

[0041] The specific process steps are as follows:

[0042] (1) Before laser cladding, use No. 240 sandpaper to polish the surface of TA2 titanium alloy to be laser clad, so that the surface roughness reaches Ra6.4μm; then clean the surface to be laser clad with 10% sulfuric acid aqueous solution by volume , The pickling time is 5-10 minutes; after pickling, rinse with water, wipe the surface of the workpiece to be melted with...

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Abstract

The invention discloses a material for laser cladding of a titanium alloy surface and a laser cladding method, and belongs to the field of a material surface strengthening technology. The material for the laser cladding of the titanium alloy surface is formed by mixing the components by mass percent: 63-86% of Fe3Al powder and 14-37% of Tic-TiB2 ceramic hard phase powder. Through cladding Fe3Al and TiC-TiB2 ceramic hard phase on the titanium alloy surface by laser, the titanium alloy surface strengthened coat with significantly improved hardness and wearing resistance can be obtained, and the production cost can be reduced by 30% to 40%.

Description

technical field [0001] The invention relates to a material for laser cladding on the surface of a titanium alloy and a method for laser cladding, belonging to the technical field of material surface strengthening. Background technique [0002] Titanium alloy has the characteristics of high specific strength, high specific modulus and excellent corrosion resistance, and has been widely used in aerospace and other fields. However, the surface wear resistance of titanium alloy is poor, which limits its potential. Laser cladding technology can repair various failed parts, such as aeroengine blades, etc. The use of laser technology to clad ceramic coatings or ceramic particle-reinforced composite coatings is an effective way to improve the wear resistance of titanium alloy surfaces. It can combine laser cladding layers with titanium alloy substrates to form laser cladding with good strength and toughness. layer. At present, the alloy systems for laser cladding on the surface o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
Inventor 刘鹏李嘉宁李士凯张元彬
Owner SHANDONG JIANZHU UNIV
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