Best practices and materials for welding
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Posted On :
Jan-17-2012
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Article Word Count :
514
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Over ten years in Welding, Paul from Thor Welding Supplies has expertise and knowledge on welding. Jump online to purchase welding supplies and of course our famous welding Electrodes .
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Welding is a fabrication process that joins materials by coalescing them. This is often done by melting different metal pieces and adding a filler material to form a pool of molten material. Once this the weld pool cools it becomes a strong joint. Welding can be performed in many different environments and it uses many different energy sources, including a gas flame, an electric arc, a laser, an electron beam, friction, and ultrasound. Knowing some of the best practices used and the materials needed in welding can make your welding job cheap and effective.
Welding can be a dangerous undertaking; precautions are required to avoid burns, electric shock, vision damage, inhalation of poisonous gases and fumes, and exposure to intense ultraviolet radiation. To protect themselves against exposure to extreme heat and flames welders wear personal protective equipment in the form of heavy leather gloves and protective long sleeve jackets. Goggles and welding helmets with dark face plates are worn to prevent exposure to the brightness of the weld area; indeed, new helmet models have been produced that feature a face plate that self-darkens upon exposure to high amounts of UV light. To protect bystanders, translucent welding curtains often surround the welding area. These curtains are made of a plastic film that shields nearby workers from exposure to the UV light from the electric arc.
Arc welding is one of the main kinds of welding. This process uses a welding power supply to create and maintain an electric arc between the welding electrode and the base material to melt metals at the welding point. They can use either direct (DC) or alternating (AC) current, and consumable or non-consumable welding electrodes. The welding region is sometimes protected by some type of inert or semi-inert gas, known as a shielding gas, and filler material is sometimes used as well.
Shielded metal arc welding (SMAW) is one of the most common types of arc welding; it is also known as manual metal arc welding (MMA) or stick welding. Electric current is used to strike an arc between the base material and consumable electrode rod, which is made of steel and is covered with a flux that protects the weld area from oxidation and contamination by producing carbon dioxide (CO2) gas during the welding process. The electrode core itself acts as filler material, making separate filler unnecessary.
The process of arc welding is versatile and can be performed with relatively inexpensive equipment. Because the welding supplies for this process can be obtained cheaply, it is well-suited to shop jobs and field work. An operator can become reasonably proficient with a modest amount of training and can achieve mastery with experience. Weld times can be slow since it is necessary to replace the consumable welding Electrodes frequently and because the residue from the flux must be chipped away after welding. It should also be noted that arc welding is generally limited to welding ferrous materials, though special electrodes have made possible the welding of cast iron, nickel, aluminum, copper, and other metals.
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Article Source :
http://www.articleseen.com/Article_Best practices and materials for welding_134981.aspx
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Author Resource :
Over ten years in Welding, Paul from Thor Welding Supplies has expertise and knowledge on welding. Jump online to purchase welding supplies and of course our famous welding Electrodes .
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Keywords :
Welding, Welding Supplies, Welding Electrodes,
Category :
Business
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Business
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