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A kind of ti2alnb intermetallic compound laser welding method

An intermetallic compound, laser welding technology, used in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problem of lack of laser welding seam cold crack laser welding technology and other problems, and achieve good internal quality and appearance quality of welding seam , The comprehensive mechanical properties of the weld are excellent, and the weld is excessively smooth.

Active Publication Date: 2018-09-25
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But currently for Ti 2 There are few studies on laser welding of AlNb intermetallic compounds, and there is a lack of laser welding methods to control defects such as cold cracks and oxidation in laser welds

Method used

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  • A kind of ti2alnb intermetallic compound laser welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Ti 2 AlNb intermetallic compound 1mm thick plate butt welding

[0031] Weld joint thickness 1mm Ti 2 AlNb intermetallic compound (cold rolled sheet) butt welding. Before laser welding, clean up the scale, oil and other impurities within the range of (20-50) mm from the center of the weld; during welding, the laser base power P 基 800W, laser peak power P 峰 1800W, pulse width tp is 20ms; welding speed v is 1300mm / min; spot diameter D is 0.45mm, defocus l is 0mm; 99.99% high-purity argon is used for front and back protection, and the front gas flow rate is 18L / min, the back gas flow rate is 5L / min; the welding arc closing distance is 1mm, and the continuous attenuation zigzag laser output is adopted. After the arc closing, the front side blowing gas and the back protection gas are delayed for 7s to 8s and then stop blowing. Welding result surface: The surface of the weld seam is well formed, without pores, cracks and other defects. The average tensile stre...

Embodiment 2

[0032] Example 2: Ti 2 AlNb intermetallic compound 2mm thick plate butt welding

[0033] Weld joint thickness 2mm Ti 2 AlNb intermetallic compound (hot rolled sheet) butt welding. Before laser welding, clean up the scale, oil and other impurities within the range of (20-50) mm from the center of the weld; during welding, the laser base power P 基 600W, laser peak power P 峰 1200W, pulse width tp is 20ms; welding speed v is 1200mm / min; spot diameter D is 0.45mm, defocus l is 0mm; 99.99% high-purity argon is used for front and back protection, and the front gas flow rate is 15L / min, the gas flow rate at the back is 4L / min; the welding arc closing distance is 2mm, and the continuous attenuation zigzag laser output is adopted. After the arc closing, the front side blowing gas and the back protection gas are delayed for 7s to 8s and then stop blowing. Welding result surface: The surface of the weld seam is well formed, without pores, cracks and other defects. The average tensil...

Embodiment 3

[0034] Example 3: Ti 2 AlNb Intermetallic Compound 3mm Thick Plate Butt Welding

[0035] Weld joint thickness 3mm Ti 2 AlNb intermetallic compound (hot rolled sheet) butt welding. Before laser welding, clean up the scale, oil and other impurities within the range of (20-50) mm from the center of the weld; during welding, the laser base power P 基 1000W, laser peak power P 峰2500W, pulse width tp is 20ms; welding speed v is 1500mm / min; spot diameter D is 0.45mm, defocus l is 0mm; 99.99% high-purity argon is used for front and back protection, and the front gas flow rate is 20L / min, the back gas flow rate is 6L / min; the welding arc closing distance is 3mm, and the continuous attenuation zigzag laser output is adopted. After the arc closing, the front side blowing gas and the back protection gas are delayed for 7s to 8s and then stop blowing. Welding result surface: The surface of the weld seam is well formed, without pores, cracks and other defects. The average tensile stren...

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Abstract

The invention discloses a laser welding method for a Ti2A1Nb intermetallic compound. Impurities such as oxidized skins, oil stains and the like on the surface of a Ti2AlNb plate are cleaned. An Nd: YAG(Neodymium-doped Yttrium Aluminum Garnet) solid laser adopting a pulse square pulse output mode is used for welding and high-purity argon is adopted for front-and-back side protection of a welding line. Zigzag waves in oscillation attenuation are used for arc suppression of the welding line. The generation of cold cracks of the welding line is prevented and the Ti2A1Nb intermetallic compound laser welding line with good surface quality and excellent comprehensive mechanical performance can be obtained. The internal quality and the appearance quality of the welding line are excellent. The joint of the welding line is smooth and nice in appearance without defects such as oxidized parts, cracks and the like, and the comprehensive performance of the welding line is good.

Description

technical field [0001] The invention belongs to the technical field of welding and relates to a Ti 2 Laser welding method of AlNb intermetallic compound. Background technique [0002] With the development of aerospace and national defense technology, Ti 2 AlNb intermetallic compounds are increasingly being used in the above fields due to their excellent high-temperature strength, specific strength and low density. If the material can be successfully applied to the manufacture of aerospace products, it can effectively reduce the weight of the product structure and improve the flight performance of the product. In the actual engineering development of products, it is often necessary to weld different parts to meet the product design requirements. The quality of the weld seam and the difficulty of welding directly affect the application of the material in the product. Therefore, it is necessary to 2 The welding method and welding process of AlNb intermetallic compounds are s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/24B23K26/12B23K26/60B23K26/323
CPCB23K26/14B23K26/24
Inventor 步贤政王志敏梁继哲杜昊龙韩铁姚为
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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