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

A welding method and titanium alloy technology, applied in 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, and achieve easy maintenance and repair. Mechanical properties, simple structure effect

Active Publication Date: 2007-07-04
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

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Embodiment Construction

[0027] A welding method for a titanium alloy skeleton and skin with variable cross-section:

[0028] Figure 1 shows the vacuum brazing process of the components. First, the parts after the inspection are pickled and cleaned, and the FTI high-strength foil-shaped solder is pre-installed on the surface of the skeleton to be welded. After the tooling is clamped, put it into the furnace for vacuum brazing. Through appropriate vacuum brazing parameters, such as high-temperature brazing parameters: 870-950°C, heat preservation for 2-60min; diffusion parameters: 700-850°C heat preservation, 30-120min, to make brazing The material melts at a high temperature and is maintained at a temperature lower than the brazing temperature for solid-state diffusion. The diffusion further homogenizes the joint tissue components. After the product is welded, disassemble the tooling and check the component size and welding quality.

[0029] Figure 2 shows the overall cross-sectional schematic view of...

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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 temperature solder welding and diffusing treatment using FTI high strength titanium alloy solder.

Description

technical field [0001] The invention relates to a welding method, in particular to the use of titanium alloy foil-shaped brazing filler metal, which is clamped by a surface pressurized thermal expansion assembly tool and heated in a vacuum as a whole to carry out a large-area connection between the titanium alloy skeleton and the variable-section skin member. . Background technique [0002] As for the welding technology of structural members connected by skeleton and skin with variable cross-section, it is still in the research stage in China at present, and there is no foreign similar technology report in data retrieval. The characteristics of this type of component are: 1. The component is mainly composed of a skeleton and a skin. There are a large number of reinforcing ribs distributed on the skeleton, and the surfaces on both sides are connected with the skin. 2. The component is a variable cross-section body, and the structural size is uneven in thickness. 3. During t...

Claims

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Application Information

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Patent Type & Authority Applications(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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