The Welding of Aluminum & Its Alloys Part 13 ppsx

... strengthening see alloying storage of parent metals 52 strengthening mechanisms 10–18 strength loss 31–34 in HAZ 32–34 in weld metal 31–32 TIG welding effects of HF 100 mechanised/ automated welding ... pulsed MIG 121–124 shielding gases 130 133 spot welding 144–146 terminating the weld 140–141 torches 125–126 torch positioning 138 –140 twin wire 124–125 wire feeders 127–128 no...

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... and the grain size of the deposit.These in their turn depend on the parent and filler metal compositions, the amount of dilution, the quality of the welding process and the welder and, lastly, the ... been strengthened by either cold working or precipitation hardening. One aspect of this is the width of the HAZ, a function of the high thermal conductiv- ity...

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... identify the condition of the alloy, in other words the amount of cold work the alloy has undergone or its heat treatment con- dition. There are a number of schemes available for identification of the alloy ... necessary to weld the lower copper-containing alloys then 4047 is the best choice as a filler metal. 50 The welding of aluminium and its alloys treatm...

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... 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...

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... 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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... 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 and the welding current when the ... 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...

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... range of materials (Fig. 8.2). The laser welding of aluminium and its alloys has, however, presented problems to the welding engineer. Poor coupling of the beam with the parent metal, high thermal ... torch. Courtesy of TWI Ltd. The wavelength of the laser light affects the coupling – the absorption of the beam energy by the metal being cut or welded. A...

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... determines the peripheral speed, the pressure applied during the welding process and the duration of the weld cycle. The metal extruded from the joint forms a flash on the outside of the weld and ... 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 electrode ti...

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... 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...

Ngày tải lên: 10/08/2014, 12:21