Distribution and reduction in P concentration of submerged arc welding slag

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  • -Trials for reusing welding slag as welding flux-
  • -Trials for reusing welding slag as welding flux-

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説明

Submerged arc welding (SAW) is widely used in the fields such as ship buildings and steel pipe production. Recently reuse of SAW slag as a raw material of SAW flux has been discussed, as a measure to reduce costs and to conserve natural resources. The present study investigated distribution of P in the slag and its major origin (i.e., welding wire or base metal plate). It also proposed slag remelting as a method of P concentration reduction of the slag. It was recognized that P was mainly distributed in the matrix and metallic steel particles with only larger diameters. It was also identified that the base metal plate was the main source of P in the slag. Remelting of the slag was proved as a promising method for P concentration reduction of the slag.

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