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Bonded flux and solid wire for submerged arc welding, and method for submerged arc welding of steel for low temperature service
Bonded flux and solid wire for submerged arc welding, and method for submerged arc welding of steel for low temperature service
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机译:埋弧焊用药芯焊丝和实心焊丝,以及低温工作用钢的埋弧焊方法
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摘要
Disclosed is a bonded flux and a solid wire for submerged arc welding, and a method for submerged arc welding of a low-temperature steel each of which gives a weld bead (weld metal) having excellent low-temperature fracture toughness with satisfactory weldability. The bonded flux includes 23-43% of MgO, 11-31% of Al2O3, 6-16% of CaF2,7-20°% of SiO2, 1.0-8.0% as CO2 equivalent of a metal carbonate, a total of 2-16% of CaO and/or BaO, 0.4-1.5% of metallic silicon, a total of 1.0-7.0% as titanium equivalent of metallic titanium and titanium oxide, a total of 0.01-0.20% as boron equivalent of metallic boron and/or boron oxide, and a total of 1.0-6.0% as equivalents of respective elements of at least one oxide of Na, K, and Li, and has a ratio ([Total Ti]+[Total B])/[SiO2] of from 0.05 to 0.55.
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