Welding method of titanium alloy framework and covering variable cross-section element

A welding method and titanium alloy technology, applied in the direction of welding medium, welding equipment, auxiliary welding equipment, etc., can solve the problems of large welding internal stress, asymmetric welding thermal expansion, uneven thickness of structure size, etc., and achieve simple and good maintenance and repair. Mechanical properties, the effect of simple structure

Active Publication Date: 2010-10-27
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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Problems solved by technology

2. The component is a variable cross-section body, and the structural size is uneven in thickness
3. During the welding process of this component, there are many complicated factors different from ordinary components, such as the internal stress caused by the previous process of the part and the asymmetrical welding thermal expansion caused by the structural complexity of the workpiece itself, etc., making it very difficult to control the welding deformation
However, the above-mentioned methods are all local heating and melting welding techniques, with large welding internal stress and serious deformation after welding. The welding deformation is greater than 0.5mm, and it is difficult to achieve large-area connection between the skeleton and the skin

Method used

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  • Welding method of titanium alloy framework and covering variable cross-section element
  • Welding method of titanium alloy framework and covering variable cross-section element
  • Welding method of titanium alloy framework and covering variable cross-section element

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Experimental program
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Effect test

Embodiment Construction

[0027] A method for welding titanium alloy skeleton and skin variable section member:

[0028] by figure 1 Shows the component vacuum brazing process. First, the inspected parts are cleaned by pickling, and the FTI high-strength foil solder is pre-installed on the frame to be welded, and then clamped by thermal expansion assembly tooling or profile pressurized thermal expansion assembly tooling Then enter the furnace for vacuum brazing, and pass suitable vacuum brazing parameters, such as high temperature brazing parameters: 870~950℃, heat preservation 2~60min; diffusion parameters: 700~850℃ heat preservation, 30~120min, make the solder at high temperature Melting occurs and heat preservation is performed at a temperature lower than the brazing temperature for solid diffusion. The diffusion further homogenizes the structure of the joint. After the product is welded, the tooling is disassembled to check the component size and welding quality.

[0029] by figure 2 Shows a schematic...

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Abstract

A titanium alloy frame and covering variable cross-section components welding methods, it presets the titanium alloy foiling solder between the frame and covering to weld surface, uses thermal expansion assembly equipments or face pressurized thermal expansion assembly equipments clamping, heats the overall unit in vacuum environment to melting solder and covering entire surface welding, completes solder welding connection through diffusing treatment after solidifying, it also provides the structural components of face pressurized thermal expansion assembly equipments which can be used below 950 degree C repeatedly, the equipment structure is simple, woke reliable, cost low and easy to use, maintenance and repairs. And it reveals the innovative composite art parameters of high temperaturesolder welding and diffusing treatment using FTI high strength titanium alloy solder.

Description

Technical field [0001] The invention relates to a welding method, especially the use of titanium alloy foil-shaped brazing filler metal, which is clamped by a profile pressurized thermal expansion assembly tool, and heated as a whole in a vacuum to connect a titanium alloy skeleton and a skin variable cross-section member in a large area . Background technique [0002] As for the welding technology of the variable cross-section component connected by the skeleton and the skin, it is still in the research stage in China, and no similar foreign technology reports have been found for data retrieval. The characteristics of this type of component are: 1. The component is mainly composed of a skeleton and a skin. A large number of reinforcing ribs are distributed on the skeleton, and the surfaces on both sides are connected with the skin. 2. The component is a variable cross-section body with uneven structural dimensions. 3. In the welding process of this component, there are many co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20B23K37/053B23K35/14
Inventor 毛建英李海刚
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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