The Welding of Aluminum & Its Alloys Part 7 docx

... this is at the torch, not at the outlet of the cylinder regulator! 7. 3.2 Welding filler wire The wire acts as both the filler metal and the anode in the welding arc. In order to do this the wire ... end the welding sequence. This is generally achieved by means of a trigger on the handle of the torch. Operating the trigger initiates the shielding gas flow a...

Ngày tải lên: 10/08/2014, 12:21

... 70 17 (AlZn5Mg2.5Mn0 .7) , 70 20 (AlZn4.5Mg1) and 70 39 (AlZn4Mg2.5Mn0 .7) are more readily weldable. The response of these alloys is very similar to that of the 6XXX series, with a loss of strength in the heat ... until the higher (>4%) copper alloys such as 2219 became available. If it is necessary to weld the lower copper-containing alloys then 40 47 is the...

Ngày tải lên: 10/08/2014, 12:21

... in the case of fusion welding above the melting point of the parent metals, and brought together to enable the components to coalesce. The heat of the welding operation is conducted into the ... metal(s). The proper- ties of this weld depend upon the composition, the quality and the grain size of the deposit.These in their turn depend on the parent and...

Ngày tải lên: 10/08/2014, 12:21

... will depend on the size of the equipment to be used, in particular the size of the torch. Welding aluminium with the gas shielded processes 70 The welding of aluminium and its alloys Visible ... design of edge preparation. Joint design is determined by the strength requirements, the alloy, the thickness of the material, the type and location of the...

Ngày tải lên: 10/08/2014, 12:21

... rod can also shield the material ahead of the weld pool from the cleaning action of the arc and this may also lead to oxide entrapment. 110 The welding of aluminium and its alloys 80° 10 to 20° ... flexible. Overheating of the torch can melt the brazed joints within the torch or the plastic tube that sheaths the power cable and it is important that 106 The...

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... of the wire position and the wire feed speed, as a balance must be achieved between the volume of metal being fed into the pool, the volume of the mould and the traverse speed. 7. 7 MIG spot welding MIG ... range of materials (Fig. 8.2). The laser welding of aluminium and its alloys has, however, presented problems to the welding engineer. Poor coupling...

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... melting, adhesion of the electrodes, pits, cracks, asymmetry of the weld spot and 174 The welding of aluminium and its alloys incompatible alloys that cannot be fusion welded together can be success- fully ... softer alloys with the harder 1% Cr-Cu or 21% Cr-Zr-Cu alloys for the welding of the cold-worked or age-hardened alloys. The profile of the elec...

Ngày tải lên: 10/08/2014, 12:21

... a WPS for the welding of aluminium or its alloys shall be approved. It gives the limits of validity of the WPS within the range of variables and includes an example of a WPAR and the accom- panying ... Tests for the Arc Welding of Steel. • Part 4 Welding Procedure Tests for the Arc Welding of Aluminium and its Alloys. • Part 5 Welding Approva...

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... affected by the source to film distance – the greater this is the sharper the image; the size of the radiation source – the smaller the source the sharper the image; the beam energy – the higher the ... completes one of the above tests then there is no limit to their range of approval. This is provided that they continue to work with the same type of wel...

Ngày tải lên: 10/08/2014, 12:21