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Aluminum alloy welding method based on SiCp/Al composite strengthening mechanism

A welding method and composite material technology, applied in the field of aluminum alloy welding, can solve the problems of limited types and size of welding workpieces, unfavorable discharge effect and tungsten electrode life, affecting the stability of the powder feeding process, etc., so as to solve the problem of softening of welded joints. , the effect of high strength, high hardness and wear resistance

Inactive Publication Date: 2019-11-26
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only suitable for gas-shielded non-melting electrode arc welding, so the types and sizes of weldable workpieces are limited; the distance between the tungsten electrode and the molten pool is relatively close, and the spatter generated by welding can easily block the hollow tungsten electrode, which not only affects the powder feeding process Stability is also detrimental to the discharge effect and the life of the tungsten electrode; the hollow tungsten electrode and the nano-particle injection device connected to the hollow tungsten electrode make the whole set of welding equipment more complicated, and the production cost is high and the implementation is difficult.

Method used

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  • Aluminum alloy welding method based on SiCp/Al composite strengthening mechanism
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  • Aluminum alloy welding method based on SiCp/Al composite strengthening mechanism

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Effect test

Embodiment 1

[0031] see figure 1 , the present invention provides a SiC-based p The aluminum alloy welding method of / Al composite material strengthening mechanism, comprises the following steps:

[0032] Step 1: Use 6061-T651 aluminum alloy plate 6 with a size of 5mm×100mm×200mm, select ER4043 coiled aluminum alloy welding wire 1, and process the groove of aluminum alloy plate 6 into a double-sided V-shaped groove with a groove angle of 60°, using a combination of mechanical cleaning and chemical cleaning to remove the oxide film on the aluminum alloy surface, for SiC p 3 pretreatment and SiC p 3 into the powder feeder;

[0033]Step 2: Butt the two aluminum alloy plates 6 to be welded and fix them on the workbench through the fixture, adjust the relative position between the wire feed nozzle 2, the powder feed nozzle 4, and the welding torch (including the tungsten electrode 5), and the three are in the In the same plane, the wire feed nozzle 2 is 20° to the horizontal plane, the angl...

Embodiment 2

[0037] see figure 2 , the present invention provides a kind of aluminum alloy welding method based on SiCp / Al composite material strengthening mechanism, comprises the following steps:

[0038] Step 1: Use 6082-T6 aluminum alloy plate 6 with a size of 6mm×150mm×300mm, select ER5087 coiled aluminum alloy welding wire 1, and process the groove of aluminum alloy plate 6 into a double-sided V-shaped groove with a groove angle of 40°, using a combination of mechanical cleaning and chemical cleaning to remove the oxide film on the aluminum alloy surface, for SiC p 3 pretreatment and SiC p 3 into the powder feeder;

[0039] Step 2: Butt the two aluminum alloy plates 6 to be welded and fix them on the workbench through clamps, adjust the relative position between the powder feeding nozzle 4 and the welding torch, the powder feeding nozzle 4 is 30° from the horizontal plane, and the powder feeding nozzle 4 The included angle with the welding torch is 60°;

[0040] Step 3: Turn on ...

Embodiment 3

[0043] see image 3 , the present invention provides a SiC-based p The aluminum alloy welding method of / Al composite material strengthening mechanism, comprises the following steps:

[0044] Step 1: Use 6082-T6 aluminum alloy plate 6 with a size of 6mm×50mm×250mm, select ER4047 coiled aluminum alloy welding wire 1, process the groove of aluminum alloy plate 6 into a bilateral V-shaped groove, and the groove angle is 50°, using a combination of mechanical cleaning and chemical cleaning to remove the oxide film on the aluminum alloy surface, for SiC p 3 pretreatment and SiC p 3 into the powder feeder;

[0045] Step 2: Butt the two aluminum alloy plates 6 to be welded and fix them on the workbench through the fixture, adjust the relative position between the wire feed nozzle 2, the powder feed nozzle 4, and the laser (emitting the laser beam 7), and the three are in the In the same plane, the wire feed nozzle 2 is 20° to the horizontal plane, the angle between the wire feed ...

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Abstract

The invention discloses an aluminum alloy welding method based on a SiCp / Al composite strengthening mechanism and belongs to the technical field of aluminum alloy welding. By means of the method, on the basis that a conventional welding method is used for welding an aluminum alloy, a synchronous powder sending manner is used for evenly adding SiCp into a molten pool at the same time, and a weldingconnector with a SiCp / Al composite as the main part is formed; and the SiCp / Al composite strengthening mechanism is utilized, the added SiCp can cause lattice deformation of base metal, the dislocation density is improved, in addition, the SiCp has high hardness and wear resistance, the welding connector softening problem happening when the conventional welding method is used for welding the aluminum alloy can be solved, and the welding connector can have high strength, hardness and good wear resistance.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy welding, in particular to a SiC-based p Aluminum Alloy Welding Method for Strengthening Mechanism of Al / Al Composites. Background technique [0002] Aluminum alloys are widely used in aerospace, automobiles, machinery manufacturing, ships and chemical industries due to their advantages of light weight, corrosion resistance, high strength, easy forming and no low temperature brittleness. With the rapid development of science and technology and industrial economy in recent years, the demand for welded structural parts is increasing, and the research on the weldability of aluminum alloys is also in-depth. The wide application of aluminum alloy has promoted the development of aluminum alloy welding technology, and the development of welding technology has expanded the application field of aluminum alloy, so the welding technology of aluminum alloy is becoming one of the hot spots of research. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/173B23K10/02B23K26/21
CPCB23K9/167B23K9/173B23K10/02B23K26/21B23K2103/10
Inventor 吴东江崔强牛方勇张恒马广义
Owner DALIAN UNIV OF TECH
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