| 摘要 |
PROBLEM TO BE SOLVED: To improve the fatigue strength in the weld zone of a wire, in the welding of soft steel and 490 MPa class steel, by reducing the transformation temperature of deposited metal, and reducing the residual stress of the weld zone. SOLUTION: The flux-cored wire is obtained by filling flux containing, by mass% to the total weight of the wire, 4.0 to 6.0% TiO2 , 1.0 to 3.0% SiO2 and 0.2 to 0.9% Al2 O3 , and in which the total of slag components is 6.0 to 9.0% of the total weight of the wire into the outer skin of stainless steel. The wire contains, by mass% to the total weight of the wire, 0.01 to 0.06% C, 0.3 to 1.8% Si, 0.7 to 2.7% Mn, 15 to 17% Cr and 9 to 11% Ni, and in which the following FM value is 0 to 4.0: FM=Cr×3-Ni×2-C×93-22.
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