Non-vacuum semi-solid stirring brazing method for aluminum alloy and composite material thereof

A composite material and brazing method technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem of semi-solid connection technology that has not been reported, and achieve the goal of overcoming adverse consequences, improving performance, and short welding cycle. Effect

Inactive Publication Date: 2011-04-06
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, there is no report on the semi-solid connection technology with the above characteristics at home and abroad.

Method used

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  • Non-vacuum semi-solid stirring brazing method for aluminum alloy and composite material thereof
  • Non-vacuum semi-solid stirring brazing method for aluminum alloy and composite material thereof
  • Non-vacuum semi-solid stirring brazing method for aluminum alloy and composite material thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1: Mount the aluminum-based composite weldment 1 on the welding platform 4 and place the Zn-Al medium-temperature brazing filler metal 2 on the two surfaces to be welded. The brazing filler metal 2 can be in the form of a sheet, a square column, a coating or sprayed on Surface to be welded. The welding piece is heated by the resistance heater 3, and the heating temperature is between 390-420°C, such as 390°C, 400°C, 410°C, 420°C, so that the solder 2 is partially melted. Immediately start the rotating sliding device, the orbital sliding platform 7 drives the stirring head 5 to move, and the rotating motor 8 mounted on the motor support 9 drives it to rotate. The rotation speed is 150-300 rpm, such as 150 rpm, 180 Revolutions / min, 200 revolutions / min, 230 revolutions / min, 250 revolutions / min, 280 revolutions / min or 300 revolutions / min, the temperature is constant during the rotation process, and the longitudinal movement speed of the stirring head 5 parallel to th...

Embodiment 2

[0035] Example 2. The second embodiment of the present invention is based on the first embodiment. After one rotation, the holding temperature is between 430-440°C, such as 430°C, 435°C, 440°C, and the holding time In 2-5 minutes, the middle solder 2 is further melted. After that, start the rotary sliding device (secondary rotation) again, the rotation speed is 100-150 revolutions / min, such as 100 revolutions / min, 120 revolutions / min, 150 revolutions / min, the stirring head slides in the opposite direction, and the moving speed is 1-1.5 cm / minute. When the stirring head moves to the initial end of the weld, stop rotating, lift the stirring head, and keep it warm for 15-30 minutes, such as 15 minutes, 22 minutes, 27 minutes, 30 minutes, and cool down with the furnace.

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Abstract

The invention provides a semi-solid brazing method for aluminum alloy and a composite material thereof under the assistance of non-vacuum mechanical stirring, which comprises the steps of: mounting a weldment taking the aluminum alloy or the composite material thereof as a base material on a welding platform first; placing intermediate-temperature solder on two surfaces to be welded, heating the weldment to between 390 and 420 DEG C, and ensuring that the solid fraction of the solder is between 50 and 80 percent; staring a rotary sliding device, wherein the rotating speed is between 150 and 300 r / m, the temperature is constant, and the longitudinal movement rate, which is parallel to a welding seam, of a stirring head is between 0.5 and 2 cm / min; stopping the rotary sliding when the stirring head moves to the terminal of the welding seam; increasing the temperature to between 430 and 450 DEG C, performing thermal insulation for 1 to 5 minutes, and ensuring that the solid fraction of the solder is between 10 and 40 percent; restarting the rotary device again, wherein the rotating speed is between 20 and 150 r / m; sliding the stirring head in a reverse direction, wherein the movementspeed is between 1 and 2 cm / m; stopping the rotation, when the stirring head moves to the initial end of the welding seam, and lifting the stirring head; and cooling the solder along with a furnace after thermal insulation for 5 to 30 minutes. The method can realize the low-cost, high-efficiency and high-quality welding of the aluminum alloy or the composite material thereof.

Description

Technical field [0001] The invention relates to a welding method of aluminum alloy and its composite materials. Background technique [0002] New aerospace structural materials with high specific strength and high dimensional stability are the basis for reducing the weight of spacecraft, improving spacecraft launch capabilities and improving the transient emergency characteristics of weaponry. Aluminum-based composite materials have the advantages of high specific strength, high specific elastic modulus, high dimensional stability, good wear resistance, etc., and have great potential use value in the aerospace field and weapon equipment field, and they are also the basis of current new materials in my country the focus of research. However, if aluminum-based composite materials want to be further promoted and applied in aerospace, weaponry and civilian products, they must solve the problem of secondary processing technology, especially the welding technology of some complex compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/00
Inventor 许惠斌杜长华罗怡伍光凤李春天
Owner CHONGQING UNIV OF TECH
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