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Anti-vacuum semi-solid states stirring soldering method of magnesium alloy and composite material thereof

A technology of semi-solid mixing and composite materials, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of semi-solid connection technology that have not been reported, and achieve the advantages of overcoming adverse consequences, avoiding softening, and low welding temperature Effect

Inactive Publication Date: 2011-02-09
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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  • Anti-vacuum semi-solid states stirring soldering method of magnesium alloy and composite material thereof
  • Anti-vacuum semi-solid states stirring soldering method of magnesium alloy and composite material thereof
  • Anti-vacuum semi-solid states stirring soldering method of magnesium alloy and composite material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Embodiment 1: Mount the magnesium alloy weldment 1 on the welding platform 4, and place the Mg-Zn medium-temperature solder 2 on the two surfaces to be welded. welding surface. The weldment is heated by the resistance heater 3, and the heating temperature is between 380-430° C., such as 380° C., 400° C., 420° C., 430° C., so that the solder 2 is partially melted. Then start the rotary sliding device, the track type sliding platform 7 drives the stirring head 5 to move, and the rotating motor 8 installed on the motor support 9 drives its rotation, and the rotational speed is 150-300 rev / min, such as 150 rev / min, 180 rev / min. Rotation / minute, 230 rotation / minute, 280 rotation / minute, 300 rotation / minute, the temperature is constant during the rotation process, the longitudinal moving speed of the stirring head 5 parallel to the welding seam is 0.5-2cm / minute, such as 0.5cm / minute , 1.0cm / min, 1.5cm / min, 2.0cm / min. When the stirring head 5 moves to the end of the weld sea...

Embodiment 2

[0035] Example 2, the second embodiment of the present invention is based on the first embodiment, after one rotation, the heat preservation time is 1-2 minutes, such as 1 minute, 1.5 minutes, 1.8 minutes or 2 minutes, so that Weldment 1 further dissolves. Subsequently, start the rotating sliding device (secondary rotation) again, the rotating speed is 100-150 rev / min, such as 100 rev / min, 120 rev / min, 140 rev / min or 150 rev / min, the stirring head slides in the opposite direction, The moving speed is 1-1.5cm / minute, such as 1cm / minute, 1.2cm / minute or 1.5cm / minute. When the stirring head moves to the initial end of the weld, stop the rotation, lift the stirring head, keep warm for 15-30 minutes, such as 15 minutes, 20 minutes, 25 minutes or 30 minutes, and cool with the furnace.

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Abstract

The invention provides an anti-vacuum semi-solid states stirring soldering method of magnesium alloy and composite material thereof, which comprises the following steps of: a weldment taking the magnesium alloy or the composite material thereof as a parent metal is arranged and blocked on a welding platform and medium temperature brazing filler metal is put on two surfaces to be welded; the weldment is heated in the temperature of 380 to 430 DEG C to cause that the solid phase ratio of the brazing filler metal is between 50 to 80%; hereupon, a rotational sliding device is started; the rotary speed is 150 to 300 r / m; the temperature is constant; a stirring head is parallel to the longitudinal movement speed of 0.5-2cm / min of a welding line; when the stirring head moves to the terminal of the welding line, the rotational sliding stops; the holding time is 1 to 5 minutes so that the weldment is further dissolved; the rotational device is started again; the rotary speed is 20 to 150 r / m; the stirring head slides in a negative direction; the movement speed is 1 to 2 cm / min. When the stirring head moves to the initial end of the welding line, the rotary stops; the stirring head is lifted; the holding temperature is 5-30 minutes, and a furnace cools. The method can realize the low cost, high efficient, high quality welding of the magnesium alloy and the composite material thereof.

Description

technical field [0001] The invention relates to a welding method for a magnesium alloy and its composite material. Background technique [0002] Magnesium alloys and their composite materials are currently the lightest structural materials in industrial applications. Magnesium alloys and their composite materials not only have high specific strength and specific stiffness, but also have excellent heat dissipation performance, electromagnetic shielding performance, shock absorption performance and mechanical Processing performance, especially in the aviation, automobile, and electronic industries has broad application prospects. Because magnesium alloy has the characteristics of low melting point, strong oxidation and wide crystallization temperature range, it is easy to oxidize and burn during welding and heating, and it is easy to produce cracks, pores, cavities, slag inclusions and deformation, etc., so the magnesium alloy Welding forming is one of the current research ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/00
Inventor 许惠斌叶宏伍光凤李晖李春天
Owner CHONGQING UNIV OF TECH
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