B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/114, 327/41
B23K 9/18 (2006.01)
Patent
CA 1080309
ABSTRACT OF THE DISCLOSURE Submerged arc welding for nickel containing steel such as steel containing 3.5 weight percent of nickel. The process uses a bond type of flux of specific composition to suppress the oxygen content in the weld metal. Further, the process utilizes a cored welding wire including a core material of specific composition. As the result, it is possible to obtain a weld metal of high impact-resistance at low temperature such as minus 100°C. The welding electrode is a cored wire consist- ing of a mild steel and core material, the core material includ- ing, on the basis of weight to the total weight of the welding electrode, 5 to 25 percent of CaF2, 2.5 to 5.5 percent of nickel, O to 0.5 percent of Mo, 0 to 0.5 percent of Ti. The flux is a bond type flux having a composition of, by weight percent, 10 to 30 percent of SiO2, 8 to 20 percent of A12O3, 25 to 45 per- cent of MgO, 10 to 30 percent of CaO, 7 to 20 percent of CaF2, and at least one member selected from the group consisting of metallic Si, Fe-Si, Fe-Si-Mn, the amount of Si in all cases being 6 percent or less calculated in terms of metallic Si. The flux has a basicity B higher than 1.5, the basicity being defined on the basis of weight by the following equation: Image .
274358
Ito Yoshinori
Nakanishi Mutsuo
LandOfFree
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