| 摘要 |
PURPOSE:To improve the safety of a welded joint part by incorporating a slag forming agent and deoxidizing agent such as Si into a flux to be filled respectively at specific weight % by the total weight of a wire and further controlling the total content of B and content of <10>B. CONSTITUTION:Flux filling parts 2, 3, etc., are formed of a metallic hoop mate rial 1 having a prescribed thickness to form a cored wire. The slag forming agent is incorporated into the flux at 0.5-9.0% by the total weight of the wire and the deoxidizing agent consisting of the components of >=1 kinds selected from Si, Mn, and Al is incorporated therein at 0.4-5.0%. Further, the total B is made 0.0020-0.080% and <10>B<= 0.0016% as the alloy additive elements and 0.1-0.5% Mn, 0.04-0.4% Ti and 0.1-3.0% Ni are respectively incorporated therein. Weld defects are prevented and the resistance of the welded joint part to the brittleness by the irradiation of neutrons and the safety of the joint are improved by the above-mentioned method. |
