Welder™s HandbookExplore further
2003-9-30u2002·u2002Fusion welding The most widely used welding proc-esses rely on fusion of the components at the joint line. In fusion welding, a heat source melts the metal to form a bridge between the components. Two widely used heat sources are: Gas flame The molten metal must be protected from the atmosphere - absorption of oxygen and nitrogen leads to a ...
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