| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a weld joint having excellent fatigue characteristics. SOLUTION: When manufacturing a weld joint, a part in which a bead toe is formed is estimated on a surface of a steel plate. A substance containing≥30 mass% Si is applied on or fixed to the surface in advance so as to include at least the part, and the welding is performed thereafter. The fatigue characteristic is enhanced by (1) improving the toe shape, (2) ensuring the characteristics of the weld metal except the final pass, and (3) preventing the hardening by avoiding Si addition to a solid wire or the like. COPYRIGHT: (C)2007,JPO&INPIT
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