Ni POWDER FOR COVERED ARC WELDING ELECTRODE, AND LOW-HYDROGEN TYPE COVERED ARC WELDING ELECTRODE

摘要

PROBLEM TO BE SOLVED: To provide Ni powder for a covered arc welding electrode and a low-hydrogen type covered arc welding electrode, which are excellent in productivity, are excellent in arc stability and welding workability such as reduction of a spatter generation quantity, and can ensure the toughness of a weld metal.;SOLUTION: Ni powder, to be added to a coating flux when manufacturing a covered arc welding electrode, has the content of C of ≤0.020 mass%, and the balance Ni with inevitable impurities, while the average particle diameter is 35-120 μm. Further, in the low-hydrogen type covered arc welding electrode, Ni powder of 3.5-12.5 mass% is contained to the total mass of the coating flux.;COPYRIGHT: (C)2012,JPO&INPIT