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Dissimilar metal welding method of titanium alloy and austenitic stainless steel

A technology of austenitic stainless steel and dissimilar metals, applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., to achieve the effect of high welding efficiency, smooth and fine weld surface, and simple operation

Inactive Publication Date: 2012-10-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the existing titanium alloy and stainless steel dissimilar metal welding technology, the problem to be solved by the present invention is to propose a welding method between titanium alloy and austenitic stainless steel dissimilar metal that is easy to implement and has stable welding quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Filled pulse tungsten argon arc welding of Ti-6Al-4V titanium alloy and Cr18-Ni8 austenitic stainless steel. The size of the Ti-6Al-4V titanium alloy plate is 180mm×120mm and the thickness is 3mm; the size of the austenitic stainless steel test plate is 180mm×120mm and the thickness is 3mm, and the two plates are butt welded.

[0021] The specific process steps of pulsed argon arc welding of titanium alloy and austenitic stainless steel are as follows:

[0022] (1) Polish the butt joint between Ti-6Al-4V titanium alloy and Cr18-Ni8 austenitic stainless steel with sandpaper, so that the surface to be welded is exposed to metallic luster; the Ti-6Al-4V titanium alloy joint is polished with a fine grinding wheel Face chamfer.

[0023] (2) Use stainless steel welding wire with a diameter of 2.0mm as the filler metal, and use sandpaper to polish the surface of the welding wire until it reveals a metallic luster before welding. The chemical composition (mass fraction) of th...

Embodiment 2

[0031] Filler pulse tungsten argon arc welding of Ti-6Al-4V titanium alloy and Cr18-Ni8 austenitic stainless steel box body corner joint. The size of the Ti-6Al-4V titanium alloy plate is 140mm×140mm and the thickness is 4mm; the size of the austenitic stainless steel test plate is 140mm×140mm and the thickness is 4mm, and the two plates are angled at 90°.

[0032] The specific process steps of pulsed argon arc welding of titanium alloy and austenitic stainless steel are as follows:

[0033] (1) Polish the corner joint between Ti-6Al-4V titanium alloy and Cr18-Ni8 austenitic stainless steel with sandpaper, so that the surface to be welded is exposed to metallic luster. Both titanium alloy and stainless steel joints are ground with a fine grinding wheel for 1mm single-side chamfering.

[0034] (2) Use stainless steel welding wire with a diameter of 2.0mm as the filler metal, and use sandpaper to polish the surface of the welding wire until it reveals a metallic luster before w...

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Abstract

The invention discloses a dissimilar metal welding method of titanium alloy and austenitic stainless steel, comprising the following steps of: carrying out grinding and assembling before welding; and carrying out welding by using a method of filler wire pulsed TIG welding. With the dissimilar metal welding method of the titanium alloy and the austenitic stainless steel of the invention, by welding parameter adjustment, preheating before the welding, thermal insulation and slow cooling after the welding and control of melting and solidification conditions of a titanium alloy and stainless steel welding pool, a welding joint which has nice weld formation, and has no defects of cracks and air holes is obtained. The welding method of the invention has high welding efficiency, low cost, convenient and flexible operation, and can meet requirement of the welding joint of welding the dissimilar metals of the titanium alloy and the austenitic stainless steel.

Description

technical field [0001] The invention relates to a welding method of dissimilar metals, in particular to a pulse tungsten argon arc welding method of titanium alloy and austenitic stainless steel, which belongs to the field of welding technology. Background technique [0002] The welding of titanium alloy and stainless steel has good application potential in the energy, chemical and atomic energy industries, but the welding of the two is very difficult. The welding of titanium alloy and stainless steel can be realized by vacuum electron beam welding and vacuum diffusion welding, but the welding equipment of these two methods is expensive, and the requirements for welding process control are strict. If the reliable connection of titanium alloy and stainless steel can be realized under welding conditions, it will have a good application prospect. [0003] The fusion welding technology of titanium alloy and stainless steel is very difficult, because the thermal conductivity and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235B23K103/24
Inventor 李亚江刘强王娟
Owner SHANDONG UNIV
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