Unlock instant, AI-driven research and patent intelligence for your innovation.

6061 aluminum alloy vacuum brazing processing technology

A processing technology, aluminum alloy technology, applied in the direction of metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of waste of materials, low efficiency, etc.

Inactive Publication Date: 2020-02-07
WUXI KAIMEIXI TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, wire cutting is mainly used to process the chassis cavity for chassis products. This processing method is not only inefficient but also wastes materials. Therefore, it is necessary to study the vacuum brazing process of 6061 aluminum alloy to improve the processing efficiency of chassis products.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 6061 aluminum alloy vacuum brazing processing technology
  • 6061 aluminum alloy vacuum brazing processing technology
  • 6061 aluminum alloy vacuum brazing processing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The chemical composition of 6061 aluminum alloy is listed in Table 1:

[0020] Table 1 Chemical composition of 6061 aluminum alloy (mass fraction / %)

[0021]

[0022] The welding temperature of vacuum brazing needs to be lower than the solidus temperature of the base metal, but higher than the liquidus temperature of the brazing material. This temperature can complete the welding without melting the base metal, so the influence on the base metal is relatively Small, and the structural deformation is relatively small. The solidus temperature of 6061 aluminum alloy is 582°C-595°C, and the liquidus temperature is 635°C-652°C. In theory, the welding temperature should not exceed 593°C. Suitable solder for vacuum brazing of 6061 aluminum alloy.

[0023] The selection of brazing material is crucial to the success or failure of parts welding. The selection of brazing material has the following principles: try to choose the brazing material whose main component is consiste...

Embodiment 2

[0039] For example figure 1 The cuboid enclosure shown was subjected to vacuum brazing tests. The surface of the weldment is cleaned with alkali and acid, and the chassis is vacuum brazed with 4004 composite solder and temperature parameter 2, and heat treatment is carried out after welding. After the welding is completed, check whether it can meet the design requirements, check the quality of the weld seam, and measure the outer dimensions of the chassis.

[0040] After vacuum brazing and heat treatment strengthening, the weld penetration test results are as follows: figure 2 As shown, it can be seen from the figure that none of the four welds obtained by welding has any penetration site, which meets the design requirements.

[0041] The measurement results of the outer dimensions of the chassis are shown in Table 5. It can be seen that the outer dimensions of the chassis after vacuum brazing and heat treatment meet the design requirements and there is no out-of-tolerance ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Average tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a 6061 aluminum alloy vacuum brazing processing technology. A 4004 aluminum alloy brazing solder is placed on a 6061 aluminum alloy workpiece brazing surface. A workpiece is placed in a brazing furnace. The brazing furnace is ignited. The temperature in the furnace is heated to 400 DEG C. Then, the temperature is kept for 0.5 h at 400 DEG C. The temperature in the furnace is increased to 565 DEG C through heating after heat preservation treatment. Then, the temperature is kept for 0.5h at 565 DEG C. The temperature in the furnace is increased to 590 DEG C through heating after heat preservation treatment, Then, the temperature is kept for 1 h at the temperature of 590 DEG C. After brazing is completed, the workpiece is naturally cooled to room temperature in the furnace. The brazed workpiece is heated for 2 h to 525 + / -5 DEG C, and the workpiece is subjected to heat preservation for 1.5 h at the temperature. Then, the workpiece is taken out and is placed into clear water at the temperature of 35-40 DEG C to be cooled to room temperature. Then, the workpiece is put into a constant-temperature test box for artificial aging. The workpiece is heated to 170 DEG Cand subjected to heat preservation for 8 h. And then natural cooling is carried out in the air. The tensile strength of the workpiece is high, and the strength use requirements of a chassis of avionics equipment can be met.

Description

Technical field: [0001] The invention belongs to the technical field of aluminum alloy vacuum brazing production, and in particular relates to a 6061 aluminum alloy vacuum brazing process. Background technique: [0002] Vacuum brazing is a high-quality welding method that uses capillary action to fill the gap between the base metals with brazing material in a vacuum environment without using flux. It has the advantages of small welding deformation, high appearance quality, simple structure, high processing efficiency, and environmental protection. It is widely used in aerospace, aviation and other industries. It is a common processing method for aluminum alloy chassis of airborne equipment in avionics systems. [0003] In the 1970s, foreign countries have begun to study the vacuum brazing of aluminum alloys. At this stage, the United States, Britain, and Japan are already in the stage of high-quality mass production, while vacuum brazing started late in my country and is ma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23K1/008B23K1/20C22F1/04B23K103/10
CPCB23K1/008B23K1/206B23K2103/10C22F1/04
Inventor 胡琼
Owner WUXI KAIMEIXI TECH