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A kind of ternary gas shielded welding method with flux added to titanium alloy and pure aluminum

A ternary gas and flux technology, used in metal processing equipment, welding equipment, welding media, etc., can solve the problems of heating, heat preservation, cooling for a long time, difficult to achieve on-site welding, different lattice structures, etc. Application, welding application convenient and flexible, low cost effect

Inactive Publication Date: 2016-08-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

4) The lattice structure of titanium and aluminum is different, and it is a material that is difficult to fuse. It is difficult to realize the fusion welding connection of the two without unconventional means.
However, the use of this technology is a solid-phase connection, which requires vacuum diffusion welding equipment with good performance. It has high requirements for the surface processing, assembly and cleanliness of the connected parts, and it takes a long time for heating, heat preservation and cooling. Welding efficiency is low, especially it is difficult to realize on-site welding due to equipment limitations

Method used

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  • A kind of ternary gas shielded welding method with flux added to titanium alloy and pure aluminum
  • A kind of ternary gas shielded welding method with flux added to titanium alloy and pure aluminum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Pulse ternary mixed gas shielded welding of Ti-6Al-4V titanium alloy and 1060 industrial pure aluminum with flux. The size of the Ti-6Al-4V titanium alloy plate is 180mm×120mm and the thickness is 2.5mm; the size of the 1060 industrial pure aluminum plate is 160mm×120mm and the thickness is 2.5mm.

[0026] Concrete process steps are as follows:

[0027] (1) Al-SiCu alloy welding wire with a diameter of 1.0mm is used as the filler metal, and the surface of the welding wire is polished with sandpaper before welding until the metallic luster is exposed. The chemical composition (mass fraction) of the Al-Si-Cu alloy wire used is: Si 5.5%, Fe 0.8%, Cu 0.3%, Mn 0.05%, Mg 0.05%, Zn 0.10%, Ti 0.25%, and the rest is Al.

[0028] (2) Polish the butt joint between Ti-6Al-4V titanium alloy and 1060 industrial pure aluminum with sandpaper, so that the surface to be welded is exposed to metallic luster, and the surface roughness reaches Ra1.6-3.2; Ti-6Al-4V titanium alloy Grind the...

Embodiment 2

[0035] Pulse ternary mixed gas shielded welding of Ti-6Al-4V titanium alloy and 1060 industrial pure aluminum box body corner joint. The size of the Ti-6Al-4V titanium alloy plate is 160mm×160mm and the thickness is 2.0mm; the size of the 1060 industrial pure aluminum plate is 160mm×160mm and the thickness is 3.0mm.

[0036] Concrete process steps are as follows:

[0037] (1) Al-Si-Cu alloy welding wire with a diameter of 1.2 mm is used as the filler metal, and the surface of the welding wire is polished with sandpaper before welding until the metallic luster is exposed. The chemical composition (mass fraction) of the Al-Si-Cu alloy welding wire used is: Si 5.5%, Fe 0.8%, Cu 0.3%, Mn 0.05%, Mg 0.05%, Zn 0.10%, Ti 0.25%, and the rest is Al.

[0038] (2) Polish the butt joint between Ti-6Al-4V titanium alloy and 1060 industrial pure aluminum with sandpaper, so that the surface to be welded is exposed to metallic luster, and the surface roughness reaches Ra1.6-3.2; Ti-6Al-4V tit...

Embodiment 3

[0046] Pulse ternary mixed gas shielded welding of Ti-6Al-4V titanium alloy and 1060 industrial pure aluminum box body corner joint. The size of the Ti-6Al-4V titanium alloy plate is 160mm×160mm and the thickness is 2.0mm; the size of the 1060 industrial pure aluminum plate is 160mm×160mm and the thickness is 3.0mm.

[0047] Concrete process steps are as follows:

[0048] (1) Al-Si-Cu alloy welding wire with a diameter of 1.2 mm is used as the filler metal, and the surface of the welding wire is polished with sandpaper before welding until the metallic luster is exposed. The chemical composition (mass fraction) of the Al-Si-Cu alloy wire used is: Si 5%, Fe 0.9%, Cu 0.4%, Mn 0.06%, Mg 0.06%, Zn 0.12%, Ti 0.20%, and the rest is Al.

[0049] (2) Polish the butt joint between Ti-6Al-4V titanium alloy and 1060 industrial pure aluminum with sandpaper, so that the surface to be welded is exposed to metallic luster, and the surface roughness reaches Ra1.6-3.2; Ti-6Al-4V titanium allo...

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Abstract

The invention relates to a titanium alloy and pure aluminum fluxing-agent-added ternary gas shielded welding method. A chamfer is polished at the position of a connector on one side of titanium alloy, then the titanium alloy is coated with a fluxing agent, and drying through cold air is achieved; the titanium alloy coated with the fluxing agent is in butt joint with a pure aluminum flat plate to be placed in a protection cover filled with inert gas, and Al-Si-Cu alloy welding wires serve as filling materials for pulsation welding; after welding is finished, a welded piece is placed into a drying oven or an insulation box to be slowly cooled to the indoor temperature; the cooled welded piece is washed with warm water at the temperature ranging from 50 DEG C to 70 DEG C and is then naturally dried. According to the fluxing-agent-added titanium alloy and pure aluminum dissimilar metal welding technology, the arc stability is obviously improved, and fusion of titanium and aluminum is promoted through the fluxing agent particularly; a small amount of CO2 is added into Ar+He inert gas, so that increase of the fusion depth is facilitated, fusion of the titanium and the aluminum is promoted, and the tensile strength of a welding connector is larger than or equal to the tensile strength of pure aluminum base metal.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a welding method of dissimilar nonferrous metals, in particular to a pulse ternary mixed gas shielded welding method of titanium alloy and pure aluminum plus flux. Background technique [0002] Using a single material in modern engineering often cannot meet various requirements in practical applications. From the perspective of energy saving and emission reduction, the use of materials with different properties under different working conditions can meet the performance advantages of different materials, and dissimilar light metal welded structures have attracted more and more attention. Aluminum has the characteristics of high specific strength, low density, good corrosion resistance, good thermal conductivity and electrical conductivity, and is the main lightweight structural material. Titanium alloy has the characteristics of small linear expansion coefficient and elastic modu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/09B23K9/167B23K9/23B23K35/28
CPCB23K9/09B23K9/167B23K9/232B23K35/288B23K2103/18
Inventor 李亚江王娟张永兰
Owner SHANDONG UNIV