| 摘要 |
PROBLEM TO BE SOLVED: To provide the resistance spot welding method for different materials, with which different materials such as a steel and an aluminum material can be joined with a high welding strength without reducing thickness due to production of surface flash and with which a strong weld zone with a high breaking energy can be highly efficiently obtained. SOLUTION: In carrying out resistance spot welding of a steel material 13 to an aluminum or an aluminum alloy material 14, a pulselike electric current is made to flow between electrodes 11, 12. In other words, an energizing period and a stopping period are alternately repeated, wherein the energizing time t1 is 0.6-10 times as long as the stopping time t2. The steel material 13 is a steel plate coated with zinc or zinc based alloy, or a steel plate plated with aluminum or aluminum alloy. The plating is hot-dip aluminum alloy plating containing 3-15 mass% Si and 0.5-5 mass% Fe. COPYRIGHT: (C)2006,JPO&NCIPI |
