The Welding of Aluminum & Its Alloys Part 11 pps

... 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 ... glycerine, is applied to form a film on the surface of the test piece. This aids the transmission of the beam into the sample. 210 The welding of...

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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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... 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° ... mechanisation is simplified if the weld is 114 The welding of aluminium and its alloys results in overheating and melting of the electrode. Manual TIG weldi...

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... HAZ 32–34 in weld metal 31–32 TIG welding effects of HF 100 mechanised/ automated welding 114 – 115 parameters (argon shielding) 104 parameters (helium shielding) 113 process principles 97–101 shielding ... 167–169 seam welding 175–176 spot welding 171–175 surface condition 169–171 236 Index solidification cracking see hot cracking solid solution strengthening see alloying stora...

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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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... 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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