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9 Cards in this Set
- Front
- Back
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Forge Welding |
-AKA, hammer welding -This process involves the use of a forge to heat the metal to a soft, plastic temperature. The ends of the iron are then placed together and hammered until fusion took place. -The industrial Revolution, from 1750 to 1850, introduced this method of joining pieces of iron together. |
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A Weld |
is defined by the AWS as " a localized coalescence(the fusion or growing together of the grain structure of the materials being welded) of metals or nonmetals produced either by heating the materials to the required welding temperatures, with or without the application of pressure, or by the application of pressure alone, and with or without the use of filler materials |
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Welding |
Is defined as a joining process that produces coalescence of materials by heating them to the welding temperature, with or without the application of pressure or by the application of pressure alone, and with or without the use of filler metal. |
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Shielded metal arc welding |
-uses a 14 inch long consumable stick electrode that conducts the welding current from the electrode holder to the work, and as the arc melts the end of the electrode away, it becomes part of the weld metal. -the welding arc vaporizes the solid flux that covers the electrode so that it forms an expanding gaseous cloud to protect the molten weld metal. |
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Gas tungsten arc welding |
- uses a non consumable electrode made of tungsten. - With this welding the arc between the electrode and the base metal melts the base metal and the end of the filler metal as it is manually dipped into the molten weld pool. - A shielding gas flowing from the gun nozzle protects the molten weld metal from atmospheric contamination. - It is the cleanest of all manual welding processes |
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Gas metal arc welding |
-uses a solid electrode wire that is continuously fed from a spool, through the welding cable assembly, ad out through the gun. -the welding power flows through a cable in the cable assembly and is transferred to the electrode wire at the welding gun. |
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Flux cored arc welding |
uses a flux core electrode wire that is continuously fed from a spool, through the welding cable assembly, and out through the gun. |
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Welding certification |
-is very restrictive; it allows a welder to perform only code welds covered by that test. - they are usually good for a maximum of six months unless a welder is doing code-quality welds routinely. |
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The American Welding Society |
- has developed three levels of certification for welders. - the first level, Entry level welder, is for the beginning welder. - Level2 and level3 are for more skilled welders. |
