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Magnesium alloy and aluminum alloy heterogeneous non-vacuum mechanical forced rotation semi-solid brazing method

A brazing method and aluminum alloy technology, applied in non-electric welding equipment, welding equipment, welding equipment and other directions, to achieve the effect of reliable joints, short welding cycle and high-quality welding

Inactive Publication Date: 2011-12-21
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this process introduces the semi-solid welding of magnesium alloy and aluminum alloy heterogeneity into mechanical rotation to realize the economical and efficient welding of magnesium alloy and aluminum alloy. At the same time, there is no report on the semi-solid joining technology with the above characteristics at home and abroad.

Method used

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  • Magnesium alloy and aluminum alloy heterogeneous non-vacuum mechanical forced rotation semi-solid brazing method
  • Magnesium alloy and aluminum alloy heterogeneous non-vacuum mechanical forced rotation semi-solid brazing method
  • Magnesium alloy and aluminum alloy heterogeneous non-vacuum mechanical forced rotation semi-solid brazing method

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Experimental program
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Effect test

Embodiment 1

[0037] see figure 1 and Figure 2A , the AZ31B magnesium alloy to-be-welded piece 6 and the 2024 aluminum alloy to-be-welded piece 8 were clamped on the fixture 5, and the gap between the to-be-welded pieces was 500 μm. And place Zn-Al27 mid-temperature solder 3 on the welding surfaces of the two parts to be welded 6 and the welded part 8, the solder can be sheet, foil, coating or sprayed on the surface to be welded in advance. Utilize the cylinder 1 to apply pressure between the weldment 6 and the weldment 8 and maintain a constant value. The loading pressure is 0.3 MPa. At the same time, the high-frequency coil 4 is used to heat the workpiece to be welded. melt. Start the rotary platform 2, the rotation mode is double weldment rotation, the rotation direction is opposite, the speed is 300r / min, the temperature is constant during the rotation, and the rotation time is 30 seconds. After the rotation stops, the temperature rises at a certain heating rate, the heating rate is...

Embodiment 2

[0039] see figure 1 and Figure 2B, the AZ91D magnesium alloy to-be-welded piece 6 and the 6061 aluminum alloy to-be-welded piece 8 were clamped on the fixture 5, and the gap between the welded pieces was 600 μm. And place Zn-Al12 mid-temperature solder 3 on the two surfaces to be welded. The solder can be in the form of flakes, foils, coatings or sprayed on the surfaces to be soldered in advance. Use the cylinder 1 to apply pressure between the weldments and maintain a constant value. The loading pressure is 0.2 MPa, and the weldment 6 and the workpiece 8 are heated at the same time. The heating temperature is 380 ° C, so that the middle layer solder 3 is semi-solid. Start the rotating platform 2 device, the rotation method is single weldment rotation, the speed is 300r / min, the temperature is constant during the rotation, and the rotation time is 40 seconds. After the rotation stops, the temperature rises at a certain heating rate, the heating rate is 1°C / s, and it is kept...

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Abstract

The invention relates to a magnesium alloy and aluminum alloy heterogeneous non-vacuum machinery forced rotation semi-solid brazing method; a magnesium alloy weldment and an aluminum alloy weldment are clamped on a clamp, Zn-Sn or Zn-Al-Sn system other brazing materials are arranged on two surfaces to be brazed, the weldments are heated, the heating temperature is between 350DEG C to 450DEG C, simultaneously pressure is increased, the pressure range is 0.1MPa to 1MPa, so that the brazing materials on a middle layer are in a semi-solid state, a rotary device is started, the rotating speed is 65r / min to 1500r / min, the temperature is constant during a rotation process, and the rotation time is 10s to 300s. After the rotation, the temperature rises by a certain rate, the heat is insulated at preset temperature, so that the brazing materials dissolve parent materials with a certain thicknesses, the heat insulating temperature is between 400DEG C to 480DEG C, and the heat insulating time is1min to 5min. Afterwards, pressure is increased, the pressure range is 0.1MPa to 1MPa, the rotary device is started again (secondary rotation), the rotating speed is 65r / min to 600r / min, rotation is stopped after 3s to 60s, and cooling is carried out with a furnace after the heat is insulated for 5 min to 30min. The magnesium alloy and aluminum alloy heterogeneous non-vacuum machinery forced rotation semi-solid brazing method can realize the high-efficiency, high-quality and economic connection of a magnesium alloy and an aluminum alloy.

Description

technical field [0001] The invention relates to a heterogeneous welding method of magnesium alloy and aluminum alloy. Background technique [0002] The characteristic of dissimilar metal welded components is that they can maximize the use of the respective advantages of the materials, receive the effect of "making the best use of everything", and obtain better economic benefits. Due to its high specific stiffness, good thermal and electrical conductivity, good electromagnetic shielding and damping performance, and low price, Mg has become one of the most promising non-ferrous metal materials in the new century. The welding of aluminum-magnesium dissimilar materials combines the high specific strength, high specific elastic modulus, high damping and shock absorption, high thermal conductivity, high electrostatic shielding, high machinability and extremely low density of magnesium with the good mechanical strength of aluminum. , good corrosion resistance combined. And becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/19B23K20/233B23K103/18
Inventor 许惠斌罗泉祥张小彬周博芳杜长华曾友亮孙汇彬
Owner CHONGQING UNIV OF TECH
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