Arc spot welding method for copper-tungsten dissimilar metal plates

An arc spot welding and metal plate technology, applied in arc welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of complex operation and high process requirements, simplify the operation process, improve the operation efficiency, and ensure the overall connection firmness Effect

Inactive Publication Date: 2019-06-04
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of complex operation and high process requirements in the connection of copper and tungsten plates by using the existing technology in the rolling process of tungsten plates, the present invention proposes a copper-tungsten dissimilar metal plate arc spot welding method

Method used

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  • Arc spot welding method for copper-tungsten dissimilar metal plates
  • Arc spot welding method for copper-tungsten dissimilar metal plates
  • Arc spot welding method for copper-tungsten dissimilar metal plates

Examples

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Embodiment 1

[0038] Example 1, using the copper-tungsten dissimilar metal plate arc spot welding method of the present invention, a pure copper plate with a thickness of 1 mm and a pure tungsten plate with a thickness of 0.5 mm are fixed by lap spot welding.

[0039] Among them, the grade of the copper plate is T1, and the external dimensions are 100mm×25mm; the grade of the tungsten plate is W1, and the external dimensions are 100mm×25mm. Clean the surface of the tungsten plate with a cleaning solution and acetone prepared by concentrated sulfuric acid, dilute hydrochloric acid and water at a volume ratio of 10:10:80; use coarse sandpaper, dilute hydrochloric acid, clear water and acetone to clean the surface of the copper plate. The overlap between the copper plate and the tungsten plate is 25mm, and the active agent is SiO 2 And the coating surface area is 12×12mm 2 . The TIG welding parameters are as follows: the welding current value is 140A, the distance between the tungsten electr...

Embodiment 2

[0040] Embodiment 2, using the same method as in Embodiment 1, the pure copper plate with a thickness of 1 mm and the pure tungsten plate with a thickness of 0.5 mm are fixed by lap spot welding. The only difference is that the welding current value is 170A, and after the welding is completed, such as figure 2 SEM image of the copper-tungsten joint shown.

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Abstract

The invention belongs to the technical field of dissimilar metal plate welding, and particularly relates to an electric arc spot welding method for a copper-tungsten dissimilar metal plate. The problems that operation is complex and the process requirement is high when the prior art is adopted for connecting a copper plate with a tungsten plate in the tungsten plate rolling process are solved. Theinvention discloses the electric arc spot welding method for the copper-tungsten dissimilar metal plate. The electric arc spot welding method comprises the following steps that S1, surface cleaning is conducted on the copper plate and the tungsten plate; S2, the copper plate and the tungsten plate are fixed in a lap joint mode, and the surface of the copper plate is coated with an active agent; and S3, spot welding fixing is conducted on the tungsten plate and the copper plate by adopting the TIG welding method. With the adoption of the electric arc spot welding method for the copper-tungstendissimilar metal plate, not only are connection and fixing between the copper plate and the tungsten plate achieved, but also operation can be simplified, and the process requirements can be reduced.

Description

technical field [0001] The invention belongs to the technical field of welding of dissimilar metal plates, and in particular relates to an arc spot welding method for copper-tungsten dissimilar metal plates. Background technique [0002] In recent years, in industrial production, in order to roll tungsten plates into ultra-thin plates, it is necessary to introduce traction plates during the rolling process to provide traction for the tungsten plates to move forward during the rolling process. Among them, the copper plate is selected as the traction plate in the rolling process of the tungsten plate because of its better shape. However, since copper and tungsten have very different physical properties such as melting point, thermal conductivity, and thermal expansion coefficient, it is very difficult to directly weld the tungsten plate and the copper plate. [0003] At present, the connection technologies for copper-tungsten mainly include diffusion welding, brazing, active ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/007B23K9/167B23K9/235B23K35/362B23K103/18
Inventor 石玗邓志然顾玉芬李广张刚
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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