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Method for reinforcing laser cladding layer on surface of titanium alloy

A technology of laser cladding and titanium alloy, which is applied in the coating process and coating of metal materials, can solve the problems of unstable surface morphology and wear resistance, reduce the content of brittle phase, etc., and achieve the improvement of surface morphology and durability Grinding performance, strong applicability, and easy promotion and application

Active Publication Date: 2012-08-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The method for strengthening the laser cladding layer on the surface of titanium alloy of the present invention is aimed at Ti-Al or Fe-Al intermetallic compound-based TiB on the surface of titanium alloy 2 -C laser cladding layer surface morphology and wear resistance are unstable defects, through the addition of Cu to eliminate cracks in the cladding layer and moderately reduce the brittle phase content, thereby improving the cladding layer surface morphology and wear resistance

Method used

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  • Method for reinforcing laser cladding layer on surface of titanium alloy
  • Method for reinforcing laser cladding layer on surface of titanium alloy
  • Method for reinforcing laser cladding layer on surface of titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Cut the Ti-6Al-4V alloy into a cuboid with a length of 30 mm, a width of 10 mm, and a thickness of 10 mm. Before mixing powder coating, clean the surface of titanium alloy, wipe down and blow dry. Then, the mass fraction of 70% Al 3 Ti, 10% C by mass fraction, 15% TiB by mass fraction 2 , The mixed powder with a mass fraction of 5% Cu is laser-clad on its 30mm×10mm surface.

[0063] The specific process steps are as follows:

[0064] (1) Weigh Al respectively 3 Ti alloy powder 0.70g, C powder 0.10g, TiB 2 Cu powder 0.15g, Cu powder 0.05g, pour the weighed powder into a small beaker, and use the water glass solution with a modulus of 2.2 to 3.7 to evenly stir the mixed powder into a paste. Base powder size 20~300μm, C, TiB 2 , Cu powder size 20 ~ 300μm.

[0065] (2) Evenly coat the paste-like mixed powder on the surface of the titanium alloy with a thickness of 0.3-2 mm, and let it dry naturally.

[0066] (3) Laser cladding is carried out on the surface of the ab...

Embodiment 2

[0073] Cut the Ti-6Al-4V alloy into a cuboid with a length of 30 mm, a width of 10 mm, and a thickness of 10 mm. Before mixing powder coating, clean the surface of titanium alloy, wipe down and blow dry. Then, the mass fraction is 65% Al 3 Ti, mass fraction is 10% C, mass fraction is 15% TiB 2 , with a mass fraction of 10% Cu mixed powder laser cladding on its 30mm×10mm surface.

[0074] The specific process steps are as follows:

[0075] (1) Weigh Al respectively 3 Ti alloy powder 0.65g, C powder 0.10g, TiB 2 Cu powder 0.15g, Cu powder 0.10g, pour the weighed powder into a small beaker, and use the water glass solution with a modulus of 2.2 to 3.7 to evenly stir the mixed powder into a paste. Base powder size 20~300μm, C, TiB 2 , Cu powder size 20 ~ 300μm.

[0076] (2) Evenly coat the paste mixed powder on the surface of the titanium alloy with a thickness of 0.3-2mm, and let it dry naturally.

[0077] (3) Laser cladding is carried out on the surface of the above-ment...

Embodiment 3

[0085] Cut the Ti-6Al-4V titanium alloy into a cuboid with a length of 30 mm, a width of 10 mm, and a thickness of 10 mm. Before mixing powder coating, clean the surface of titanium alloy, wipe down and blow dry. Then, Fe and Al mixed powder with a mass fraction of 65%, C with a mass fraction of 15%, and TiB with a mass fraction of 15% 2 A mixed powder of Cu with a mass fraction of 5% is laser cladding on its 30mm×10mm surface, wherein the mass ratio of Al and Fe is between 1:1 and 1:2.

[0086] The specific process steps are as follows:

[0087] (1) Weigh 0.65g of Fe and Al mixed powder, 0.15g of C powder and TiB 2 Cu powder 0.15g, Cu powder 0.05g, wherein the mass ratio of Al and Fe is between 1:1 and 1:2. Pour the weighed powder into a small beaker, and use the water glass solution with a modulus of 2.2 to 3.7 to evenly stir the mixed powder into a paste. Base powder size 20~300μm, C, TiB 2 , Cu mixed powder size 20 ~ 300μm.

[0088] (2) Evenly coat the paste mixed po...

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Abstract

The invention discloses a method for reinforcing a laser cladding layer on a surface of a titanium alloy, which comprises the following steps that base powder is evenly mixed with mixed powder of C, TiB2 and Cu with a certain quantity proportion to form a paste shape by utilizing sodium silicate solution; the base powder is a Ti-Al intermetallic compound or Fe and Al mixed powder, the size of thebase powder is 20-30mum, and the size of the mixed powder of C, TiB2 and Cu is 20-30mum; the paste-shaped mixed powder is evenly coated on the surface of the titanium alloy, the thickness of a coating is 0.3-2mm, and the coating is naturally aired; laser beams are utilized to perform laser cladding on the surface of a titanium alloy sample pre-provided with the coating, and during the vertical scanning process of the laser beams, argon is laterally and coaxially blown to protect a molten pool and a lens barrel; and the process parameters are that laser power is 650-1500W, scanning speed is 2-11mm / s, light spot diameter is 2-9mm, and argon protection air pressure is 0.2-0.9MPa. The method for reinforcing the laser cladding layer on the surface of the titanium alloy can obtain a titanium alloy surface reinforcing coating layer with good abrasion resistance and a surface shape, and is convenient and simple in process, strong in adaptability and convenient to popularize and apply.

Description

technical field [0001] The invention relates to a method for strengthening the laser cladding layer on the surface of titanium alloy, which belongs to the technical field of material surface strengthening, in particular to a method for improving Ti-Al or Fe-Al intermetallic compound-based TiB on the surface of titanium alloy with Cu 2 -C laser cladding layer structure wear resistance and surface morphology method. Background technique [0002] Titanium alloy has the advantages 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 has significantly improved the physical and chemical properties of the repaired workpiece surface, greatly prolonging the service life of the workpiece. Laser cladding ceramic particle reinforced composite coating is an effective way to improve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 陈传忠李嘉宁于慧君
Owner SHANDONG UNIV
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