Argon-arc welding-braze welding composite welding method for connecting the titanium alloy and steel

A hybrid welding and argon arc welding technology, applied in welding equipment, welding equipment, arc welding equipment, etc., can solve problems affecting joint performance, etc., and achieve the effect of improving tensile strength at room temperature

Active Publication Date: 2011-05-11
BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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Problems solved by technology

In addition, Ti and Nb are infinitely soluble, and the connection between the two can be easily realized by conventional welding methods, while Nb and Fe and Ni in the steel can form certain intermetallic compound phases and affect the performance of the joint.

Method used

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  • Argon-arc welding-braze welding composite welding method for connecting the titanium alloy and steel
  • Argon-arc welding-braze welding composite welding method for connecting the titanium alloy and steel
  • Argon-arc welding-braze welding composite welding method for connecting the titanium alloy and steel

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Embodiment Construction

[0016] When welding titanium alloy and steel, Nb is used as the intermediate layer. First, the titanium alloy and Nb intermediate layer are welded by argon arc welding with titanium welding wire in the argon filled box, and then the titanium alloy + Nb intermediate layer and steel are brazed.

[0017] When welding titanium alloy and steel, Nb is used as the intermediate layer. First, the titanium alloy and Nb intermediate layer are welded by argon arc welding with titanium welding wire in an argon-filled box, and then the titanium alloy + Nb intermediate layer and steel are vacuum brazed.

[0018] The brazing filler metal is copper-manganese based filler metal or silver-copper-titanium filler metal. The composition of the silver-copper-titanium filler metal is as follows: the weight percentage of copper content is 25%-40%, and the weight percentage of titanium content is not more than 7 %, the balance is silver; copper-manganese-based brazing filler metals are two types: copper-mang...

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Abstract

The invention belongs to the welding technology field and relates to an argon-arc welding-composite braze welding method used for welding titanium alloy and steel. When the titanium alloy is welded with the steel, Nb is used as an intermediate layer; arc welding is conducted towards the titanium alloy and the intermediate Nb layer by using a titanium welding wire in an argon chamber; and braze welding is conducted towards the titanium alloy and the intermediate Nb layer. The method uses Nb as the intermediate layer, and utilizes fusion welding and the braze welding to weld Nb with two parent metals of the titanium alloy and the steel respectively, thus avoiding the direct contact of the titanium and iron in the two kinds of parent metal, and preventing cracks from being formed by brittle phase produced when the titanium and the steel are directly welded. Copper manganese matrix solder and silver copper titanium solder are selected for braze welding Nb and the steel, and the corresponding temperature avoids the damage to the property of the parent metals of titanium alloy.

Description

Technical field [0001] The invention belongs to the technical field of welding, and relates to an argon arc welding-brazing compound welding method for welding titanium alloy and steel. Background technique [0002] Titanium and titanium alloys have high specific strength and good corrosion resistance, and have been widely used in aviation, aerospace, nuclear industry, petroleum, chemical and other fields. With the increasing application of titanium alloys, the welding of titanium and other metals, especially the connection and compounding of titanium alloys and steel, has become a basic problem to be solved. [0003] In the welding process of titanium alloy and steel, on the one hand, due to the large difference in linear expansion coefficient and thermal conductivity between the two, the deformation during welding heating and cooling process is different, resulting in the formation of large internal stress in the joint; The solid solubility between iron and iron is very small, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/02B23K9/16B23K1/00B23K103/24
Inventor 叶雷熊华平程耀永毛唯李晓红陈波吴欣周媛
Owner BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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