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Method for welding dissimilar metals

A metal and base metal technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve problems affecting the quality of titanium and stainless steel joints

Inactive Publication Date: 2012-08-15
SHELL CHEM SERAYA PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, it has been found that the different thermal expansion characteristics between titanium and stainless steel lead to cracks formed by large tensile stresses generated by the cooling effect after welding
Therefore, these shortcomings affect the quality of joint integrity between titanium and stainless steel

Method used

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Embodiment Construction

[0016] The following description of a number of specific and alternative embodiments is provided to provide an understanding of the inventive features of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without such specific details. Some details may not be described at length so as not to obscure the invention. For ease of reference, common reference numerals are used throughout the figures when referring to the same or similar features common to the figures.

[0017] The invention provides a gas tungsten arc welding method using a V-shaped butt joint for connecting a titanium base metal part and a stainless steel base metal part. In the arc welding method of the present invention, two intermediate electrodes, vanadium and aluminum copper, are introduced between the titanium base metal and the stainless steel base metal. This method provides a strong weld between the two dissimilar base metals.

[00...

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Abstract

The present invention discloses method for joining titanium and stainless steel using Gas Tungsten Arc welding with V butt joint welding type. Intermediate bi-filler rods of vanadium and aluminum bronze are introduced to the weld pool between the titanium and the stainless steel, as the arc welding current is applied thereof The vanadium filler rod is placed adjacent to the titanium and the aluminum bronze filler rod is placed adjacent to the stainless steel, and the two intermediates filler rods are placed adjacent to each other. The present invention also discloses method for joining titanium and carbon steel by means of Gas Tungsten Arc welding with V butt joint welding type.

Description

technical field [0001] The invention relates to a method of welding two dissimilar metals. In particular, the present invention relates to a method for welding two dissimilar metals using gas tungsten arc welding. Background technique [0002] Titanium (Ti) is a metal with superior corrosion resistance and desirable mechanical properties. However, making any device application out of pure titanium alone is expensive. In many cases, it is technically and economically advantageous to combine titanium with other metals, such as stainless steel, thereby reducing the cost of titanium. Titanium-clad structures on stainless steel substrates not only provide significant cost reductions, but also provide superior durability compared to pure titanium devices. [0003] Conventional non-fusion welding of such dissimilar metals has been investigated such as mechanical joining, friction welding, explosive cladding and brazing. Explosive cladding, a method of non-fusion welding, is now...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/235B23K33/00B23K35/24
Inventor 周艺文李雪宇何炳汶刘欢
Owner SHELL CHEM SERAYA PTE
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