| 摘要 |
PURPOSE:To obtain an Ni-base cored wire having excellent performance by forming the Ni-base cored wire of Ni, Mo and W at specific ratios, forming the sheath of Ni alone and using calcined Mo powder compounded with a specific amt. of Ni powder for the metallic powder to be packed in the sheath. CONSTITUTION:A cored wire is constituted as a whole of 15-30wt% Mo, <=10 wt% W and the balance Ni and the sheath thereof is formed of substantially Ni alone. The metallic Mo powder which is compounded with >=3.5wt% Ni powder and is subjected to high-temp. calcination in a non-oxidizing atmosphere is used as the Mo source to be used as the metallic powder to be packed into the sheath. The cost is reduced if Fe powder is added into the metallic powder to be packed at <=10% by the total weight of the cored wire. The strength of the molten metal is improved if <=20% Cr and <=10% Nb are added thereto and the welding operation is improved if <=5% Mn and <=3% Si are added thereto. The resistance to blowhole, etc. are improved if 1 kind or >=2 kinds among Ti, Al, Zr, Mg are added thereto respectively at <=1%. |
