Welding is a process in which the material of the workpiece to be welded (same or different) is heated or pressurized or both are used,and whether or not to use a filler material, so that the material of the workpiece can achieve atomic bonding and form a permanentconnection process. So what are the

Causes of porosity1. Base metal is dirty, the groove edge is not cleaned2. The composition and properties of the welding materials used are quite different from those of the base metal3. Welding shielding gas problema) Insufficient argon pressure in the cylinder;b) Excessive adjustment of welding ga

(1) The main research object of welding labor hygiene is fusion welding, among which open arc welding has the greatest labor hygiene problems, and submerged arc welding and electroslag welding have the least problems. (2) The main harmful factors of shielded electrode manual arc welding, carbon arc

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