Gas Welding: Oxy-acetylene welding (gas welding) is a traditional welding method used for joining metals such as copper, brass, aluminum, and low-carbon steel. This technique is suitable for temperature-sensitive metals due to its precise flame control and is commonly applied in repairs and light projects.
Submerged Arc Welding: Submerged Arc Welding (SAW) is an advanced method for welding thick metal sheets and components (typically over 10 mm). In this process, an electric arc is formed between an electrode (usually made of steel) and the workpiece, with a flux powder shielding the arc from atmospheric contact. The flux also enhances weld quality and removes impurities. For thick sheets, the edges are beveled, and the gap between them is filled with weld metal. This method produces a highly durable weld, often stronger than the base metal, due to the uniform and gradual filling of the gap.
Advantages and Applications: Submerged arc welding, with its high strength and high deposition rate, is ideal for heavy-duty projects such as shipbuilding, pressure vessel fabrication, and pipeline construction. Compared to Shielded Metal Arc Welding (SMAW), it offers higher quality welds with a lower likelihood of failure.
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