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A kind of laser welding method of cocrcufeni high entropy alloy

A laser welding and high-entropy alloy technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as cold cracks, hot cracks, and limit the application of alloys, and achieve the effect of high strength and plasticity

Active Publication Date: 2020-07-14
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] CoCrCuFeNi is the first developed high-entropy alloy. The strength and performance of the alloy are relatively good. However, due to the high content of Cu in the alloy, the fusion welding of the alloy has encountered difficulties, resulting in the penetration of the alloy after welding. Cold cracks are accompanied by hot cracks, which limits the application of this alloy

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  • A kind of laser welding method of cocrcufeni high entropy alloy
  • A kind of laser welding method of cocrcufeni high entropy alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Two pieces of CoCrCuFeNi high-entropy alloy with dimensions of 200 × 50 × 3 mm were welded.

[0025] Welding process: Open a V-shaped groove, use acetone to ultrasonically clean it for 30 minutes, apply TiO metal paste 30 μm on the surface of the groove, and dry it naturally for 24 hours before performing laser cladding; the laser cladding power is set to 700W, and the scanning speed is 0.5m / min, circular spot, the diameter of the spot is 1.5mm, the protective gas is argon, and the gas flow rate is set to 10L / min; after cladding, apply TiO metal paste for the second time, with a thickness of 50μm, and dry naturally After 24 hours, laser welding is carried out; the laser power is set to 1200W, the welding speed is set to 0.1m / min, the spot is a circular spot with a diameter of 3mm, the laser cladding protective gas is argon, and the gas flow rate is 13L / min .

[0026] TiO metal paste composition: TiO powder 3g, titanium powder 1g, aluminum powder 1g, diethyl oxalate 2g ...

Embodiment 2

[0029] Welding of two CoCrCuFeNi high-entropy alloys with dimensions of 400×10×3 and 200×10×3 mm;

[0030] Welding process: open a V-shaped groove, use acetone to ultrasonically clean it for 30 minutes, apply TiO metal paste 50 μm on the surface of the groove, and dry it naturally for 24 hours before performing laser cladding; the laser cladding power is set to 1000W, and the scanning speed is 0.3m / min, circular spot, the diameter of the spot is 2mm, the protective gas is argon, and the gas flow rate is set to 15L / min; after cladding, apply TiO metal paste for the second time, with a thickness of 40μm, and dry it naturally for 24 Hours later, laser welding was performed; the laser power was set to 1200W, the welding speed was set to 0.1m / min, the spot was a circular spot with a diameter of 3mm, the laser cladding protective gas was argon, and the gas flow rate was 13L / min.

[0031] TiO metal slurry composition: TiO powder 5g, titanium powder 0.6g, aluminum powder 0.7g, diethyl...

Embodiment 3

[0033] Welding of two CoCrCuFeNi high-entropy alloys with dimensions of 800×100×3 and 20×100×3 mm;

[0034] Welding process: Open a V-shaped groove, use acetone to ultrasonically clean it for 30 minutes, apply TiO metal paste 10 μm on the surface of the groove, and dry it naturally for 24 hours before performing laser cladding; the laser cladding power is set to 2500W, and the scanning speed is 0.4m / min, circular spot, the diameter of the spot is 1.5mm, the protective gas is argon, and the gas flow rate is set to 25L / min; after cladding, apply TiO metal paste for the second time, with a thickness of 80μm, and dry naturally After 24 hours, laser welding is carried out; the laser power is set to 1200W, the welding speed is set to 0.1m / min, the spot is a circular spot with a diameter of 3mm, the laser cladding protective gas is argon, and the gas flow rate is 13L / min .

[0035] TiO metal paste composition: TiO powder 2.5g, titanium powder 0.9g, aluminum powder 0.9g, diethyl oxal...

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Abstract

The invention discloses a laser welding method of a CoCrCuFeNi high-entropy alloy. The laser welding method of the CoCrCuFeNi high-entropy alloy is characterized in that an alloy plate is provided with a V-shaped groove, the surface of the welded groove alloy is ultrasonically cleaned for 30 minutes by acetone, then the groove surface is coated with TiO metal slurry for the first time, and after natural drying, the TiO metal slurry arranged on the groove in a coating mode is subjected to laser cladding; and secondary coating of the TiO metal slurry is carried out, after natural drying is carried out, laser welding is carried out, and welding is completed. The welding method can better solve the crack problem in the welding process and improve the welding quality.

Description

technical field [0001] The invention relates to a laser welding technology. In particular, a method capable of realizing high-strength welding of CoCrCuFeNi high-entropy alloys. Background technique [0002] High-entropy alloy is a new type of alloy material design concept, the number of components is greater than 5, the atomic percentage of each component is basically equal, and the final formed material has a very high entropy value. Due to the variety of metal elements in this alloy and the large disorder of atomic arrangement, the high entropy effect will inevitably promote the mixing of elements, making the alloy phase composition form a single crystal structure, such as a single body-centered cubic or face-centered cubic structure. , or a mixed structure of the two, inhibits the formation of brittle intermetallic compounds. This metal structure exhibits excellent mechanical properties, which make it have some properties unmatched by traditional alloys, such as high s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/21B23K26/60
CPCB23K26/21B23K26/60
Inventor 秦庆东张英哲伍玉娇龙琼苏向东伍剑明
Owner GUIZHOU INST OF TECH