Flux for use in submerged arc welding
A submerged arc welding and flux technology, applied in arc welding equipment, welding medium, welding equipment, etc., can solve the problems of deterioration of welding metal toughness, damage to slag protection, deterioration of welding operability, etc., to reduce moisture absorption, The effect of good welding workability
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[0026] Hereinafter, the method for implementing the present invention will be described in detail. In addition, the present invention is not limited to the embodiments described below.
[0027] The inventors of the present invention conducted intensive experimental studies in order to solve the aforementioned problems, and as a result, they obtained the following conclusions. When using a DC welding power source, in order to protect the slag peelability well, the SiO of the flux should be reduced as much as possible 2 the amount. In addition, regarding MgO, if the addition amount is not increased as compared with the flux described in Patent Document 5, the slag peelability cannot be improved.
[0028] Therefore, in the flux for submerged arc welding of the embodiment of the present invention (hereinafter, also simply referred to as flux), SiO 2 The content is 10-20% by mass, the MgO content is 25-35% by mass, and the water-soluble SiO 2 It is 1.0% by mass or less. In addition, i...
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