| 摘要 |
PROBLEM TO BE SOLVED: To provide a welded joint free from the generation of molten metal embrittlement cracks in A molten metal when a galvanized steel sheet is subjected to arc welding. SOLUTION: When a steel sheet having a plated layer essentially consisting of Zn is joint-welded by arc welding, the weld metal of a welded joint part is subjected to componential regulation so as to be a metal comprising, by mass, 0.001 to 0.3% C,≤1.5% Si, 0.05 to 2.0% Mn,≤0.2% P,≤0.03% S, 0.005 to 0.1% Ti, 0.0001 to 0.01% B and 0.05 to 0.5% Mo, and, if required, further comprising one or more kinds selected from 0.001 to 0.1% Nb, 0.01 to 0.3% V and 0.01 to 0.5% Zr, and the balance Fe with inevitable impurities. COPYRIGHT: (C)2007,JPO&INPIT |
