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  2. Oxy-fuel welding and cutting - Wikipedia

    en.wikipedia.org/wiki/Oxy-fuel_welding_and_cutting

    The amount of heat applied to the metal is a function of the welding tip size, the speed of travel, and the welding position. The flame size is determined by the welding tip size. The proper tip size is determined by the metal thickness and the joint design. Welding gas pressures using oxy-acetylene are set in accordance with the manufacturer's ...

  3. Heat-affected zone - Wikipedia

    en.wikipedia.org/wiki/Heat-affected_zone

    where Q = heat input (kJ/mm), V = voltage , I = current , and S = welding speed (mm/min). The efficiency is dependent on the welding process used, with gas tungsten arc welding having a value of 0.6, shielded metal arc welding and gas metal arc welding having a value of 0.8, and submerged arc welding 1.0. [1]

  4. Submerged arc welding - Wikipedia

    en.wikipedia.org/wiki/Submerged_arc_welding

    Submerged arc welding. The welding head moves from right to left. ... The approximate value of currents to weld with 1.6, 3.2 and 6.4 mm diameter electrodes are 150 ...

  5. Welding - Wikipedia

    en.wikipedia.org/wiki/Welding

    The two processes are quite similar, differing most notably in their source of power. Laser beam welding employs a highly focused laser beam, while electron beam welding is done in a vacuum and uses an electron beam. Both have a very high energy density, making deep weld penetration possible and minimizing the size of the weld area.

  6. Atomic hydrogen welding - Wikipedia

    en.wikipedia.org/wiki/Atomic_hydrogen_welding

    Without the arc, an oxyhydrogen torch can only reach 2800 °C. [2] This is the third-hottest flame after dicyanoacetylene at 4987 °C and cyanogen at 4525 °C. An acetylene torch merely reaches 3300 °C. This device may be called an atomic hydrogen torch, nascent hydrogen torch or Langmuir torch. The process was also known as arc-atom welding.

  7. Plasma arc welding - Wikipedia

    en.wikipedia.org/wiki/Plasma_arc_welding

    Making a non-key-hole weld: The process can make non-key-hole welds on work pieces having thickness 2.4 mm and under. Making a keyhole welds: An outstanding characteristic of plasma arc welding, owing to exceptional penetrating power of plasma jet, is its ability to produce keyhole welds in work piece having thickness from 2.5 mm to 25 mm. A ...

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