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Q. Describe the Selection of elctrodes?
The selection of a proper electrode for electric arc welding is very important to obtain a sound welded joint of proper strength. The various factors affecting the selection of electrodes are:
• Power source: A.C. or D.C.
• Composition of base metal.
• Thickness of base metal.
• Welding position.
• Welding current conditions recommended by the manufacturer of the electrodes.
• Mechanical properties desired in the joint.
• Extent of penetration required in welding.
• Economic considerations.
how can select manufacturing proces
Defects Involving Inadequate Bonding Lack of fusion Involves lack of complete melting and fusion of some portion of the weld metal in a joint. It may occur either bet
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Q. Explain the use of bare electrode? This type of electrode is also known as plain electrode. No flux covers on this electrode. These types of electrodes are used for D.C. sup
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