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Stirring friction and transient liquid phase diffusion welding method for connection of dissimilar materials

A dissimilar material and friction stirring technology, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of high cost, achieve low cost, improve metallurgical reaction, and reduce excessive thermal stress.

Inactive Publication Date: 2012-12-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the disadvantages of the existing diffusion welding technology, such as high cost, easy to be limited by joint size and welding site, etc., so as to provide a friction stir instantaneous liquid phase diffusion welding method

Method used

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  • Stirring friction and transient liquid phase diffusion welding method for connection of dissimilar materials
  • Stirring friction and transient liquid phase diffusion welding method for connection of dissimilar materials
  • Stirring friction and transient liquid phase diffusion welding method for connection of dissimilar materials

Examples

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Embodiment 1

[0035] The invention provides a friction stir transient liquid phase diffusion welding method for connecting aluminum alloy and stainless steel, comprising the following steps:

[0036] A. Ni powder and Cu powder are mixed uniformly, are prepared into spraying liquid, adopt the mode of thermal spraying to spray described spraying liquid onto the welding face of described stainless steel plate 2, form the Ni-Cu coating that thickness is 100 μm, described Ni-Cu coating as the intermediate layer material of aluminum alloy and stainless steel3;

[0037] B. Put together the stainless steel plate 2 and the aluminum alloy plate 1 through step A to form a butt joint, see figure 1 ;

[0038] C. Rotate the stirring head into the joint to be welded, and generate heat by friction with the joint to be welded, so that the welding temperature is higher than the eutectic temperature of the dissimilar material and the intermediate layer substance, and the intermediate layer substance 3 forms ...

Embodiment 2

[0046] This embodiment provides a friction stir transient liquid phase diffusion welding method for connecting aluminum plates and stainless steel plates and includes the following steps:

[0047] A. The stainless steel plate 2 and the aluminum plate 1 are combined to form a horizontal lap joint, and the aluminum plate 1 and the stainless steel 2

[0048] Each has an inclined horizontal lap interface, the horizontal inclination angle θ of the horizontal lap interface of the aluminum base material and the horizontal inclination angle of the horizontal lap interface of the stainless steel base material are complementary angles to each other, and the two pass through the lap interface mated to form the horizontal lap joint, see figure 2 ;

[0049] B. Add a metal sheet made of nickel between the aluminum plate 1 and the stainless steel plate 2 as a middle

[0050] The interlayer substance 3, the thickness of the interlayer substance is 80 μm;

[0051] C. Rotate the stirring he...

Embodiment 3

[0059] This embodiment provides a friction stir transient liquid phase diffusion welding method for connecting aluminum plates and titanium plates, comprising the following steps:

[0060] A. The titanium plate 2 and the aluminum plate 1 are put together to form a horizontal lap joint, and the aluminum plate 1 and the titanium plate 2 respectively have an inclined horizontal lap interface and a vertical lap with a height h on the horizontal lap interface interface, the horizontal inclination angle θ of the horizontal lap interface of the aluminum plate 1 and the horizontal inclination angle of the horizontal lap interface of the titanium plate 2 are complementary angles, and the two form the horizontal lap joint after cooperating through the lap interface connector, see image 3 ;

[0061] B. Adding a metal foil made of nickel as an intermediate layer between the aluminum plate 1 and the titanium plate 2

[0062] Substance 3, here, the intermediate layer substance 3 can also...

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Abstract

The invention provides a stirring friction and transient liquid phase diffusion welding method for connection of dissimilar materials. Stirring friction welding and diffusion welding are combined, heat generated by stirring friction is used as a heat source of the diffusion welding, the heat source can move by continuously moving a stirring head in a welding process, so that different regions of a head to be welded is welded, other fixed equipment is not required in the welding process, heads to be welded in various shapes and sizes can be welded, and shortcomings that in the prior art, other fixed equipment is required to provide a heat source, so that cost is increased, the size and the shape of a head to be welded are easily limited by welding equipment are overcome. The stirring friction and transient liquid phase diffusion welding method has the advantages of low cost, wide application range and excellent mechanical property of welding joints.

Description

technical field [0001] The invention relates to a friction stir instantaneous diffusion welding method used for connecting dissimilar materials, and belongs to the field of welding technology. Background technique [0002] The development of new materials has made the composite structure of dissimilar materials have great application prospects in aerospace, aviation, automobile and other industrial fields. In recent years, in the application of dissimilar materials, the problems of these materials themselves or their connection with other materials are often encountered. Some new materials, such as ceramics, composite materials, intermetallic compounds, amorphous materials, single crystal alloys, etc., can be welded The reliability is poor, and the traditional fusion welding technology often cannot be welded or the mechanical properties of the welded joint are poor. [0003] At present, diffusion welding has become the main method for welding dissimilar materials. Diffusio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12
Inventor 张华张贺吴会强黄继华赵兴科陈树海
Owner UNIV OF SCI & TECH BEIJING
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