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Electron beam filler wire welding method of TC4 titanium alloy and QCr0.8 copper alloy

A qcr0.8, titanium alloy technology, applied in electron beam welding equipment, welding medium, welding equipment and other directions, can solve the problems of inability to meet the requirements of weld mechanical properties, metal metallurgy incompatibility and physical properties mismatch, etc. Achieve the effect of eliminating welding defects, improving stability and efficiency, and improving weld formation

Inactive Publication Date: 2012-11-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the existing TC4 titanium alloy and QCr0.8 copper alloy dissimilar materials cannot meet the mechanical performance requirements of the weld due to metallurgical incompatibility and physical performance mismatch when using the conventional welding process, and proposes the TC4 titanium alloy Electron Beam Wire Filler Welding with QCr0.8 Copper Alloy

Method used

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  • Electron beam filler wire welding method of TC4 titanium alloy and QCr0.8 copper alloy
  • Electron beam filler wire welding method of TC4 titanium alloy and QCr0.8 copper alloy

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specific Embodiment approach 1

[0015] Specific embodiment one: in the present embodiment, the electron beam welding method of TC4 titanium alloy and QCr0.8 copper alloy is carried out according to the following steps:

[0016] 1. Use 600# or 800# metallographic sandpaper to grind the surface of TC4 titanium alloy and QCr0.8 copper alloy to expose the rust-free surface to be welded, then wipe the surface to be welded with acetone, and then clean the TC4 titanium alloy The surface to be welded with the QCr0.8 copper alloy is fixed on the lifting platform in a docking manner. The gap between the two surfaces to be welded is 0.1mm~0.3mm. The lower beam point of the electron beam emitted by the electron gun is aligned by moving the CNC worktable. At the center of the welding head, the mass percentage of TC4 titanium alloy is composed of Al: 6.2%, V: 3.5%, impurities ≤ 0.2%, the balance is Ti, and the mass percentage of QCr0.8 copper alloy is composed of Cr: 0.4%~0.7%, Impurity ≤ 0.8%, the balance is Cu;

[0017...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that the gap between the two surfaces to be welded in step 1 is 0.2 mm. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one is: in step one, the mass percentage of TC4 titanium alloy is composed of Al: 6.2%, V: 3.5%, impurity 0.05% ~ 0.15%, and the balance is Ti, QCr0 .8 The mass percentage of copper alloy is composed of Cr: 0.5%~0.6%, impurities: 0.1%~0.5%, and the balance is Cu. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention discloses an electron beam filler wire welding method of a TC4 titanium alloy and a QCr0.8 copper alloy, which relates to a welding method of the TC4 titanium alloy and the QCr0.8 copper alloy, to solve the problem that mechanical property requirement of a welding line cannot be met because of metallurgy incompatibility and physical performance mismatching in the prior art in which common welding process is applied between different materials of the TC4 titanium alloy and the QCr0.8 copper alloy. The welding method comprises the following steps: firstly, preparing before welding; secondly, sending a copper-vanadium alloy welding wire from a wire feeding mechanism to a lower beam spot position of an electron beam through a wire feeding nozzle; and thirdly, accomplishing welding of the TC4 titanium alloy and the QCr0.8 copper alloy under the vacuum condition. The welding line obtained by using the method disclosed by the invention is smooth, level, continuous and defect-free, and is as high as 315MPa in tensile strength; and the welding method disclosed by the invention can be applied to the field of welding engineering of different materials.

Description

technical field [0001] The invention relates to a welding method of TC4 titanium alloy and QCr0.8 copper alloy. Background technique [0002] TC4 titanium alloy is widely used in aerospace, petrochemical, automobile, shipbuilding and medicine because of its excellent properties, such as corrosion resistance, low density, high specific strength, good toughness and welding performance. The QCr0.8 copper alloy has good electrical conductivity, thermal conductivity, mechanical properties and heat resistance, and is currently widely used in the fields of motor steering gear, resistance welding electrodes, high-temperature conductive and wear-resistant parts. The effective connection of TC4 titanium alloy and QCr0.8 copper alloy dissimilar materials can not only meet the requirements of thermal conductivity, wear resistance and corrosion resistance, but also meet the requirements of light weight and high strength. It is bound to be used in aerospace, shipbuilding, automobile and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/06B23K35/30B23K103/18
Inventor 张秉刚赵健王廷陈国庆冯吉才
Owner HARBIN INST OF TECH
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