RESISTANCE SPOT WELDING METHOD AND METHOD FOR MANUFACTURING WELDED MEMBER

A resistance spot welding method comprises: performing test welding; and performing actual welding after the test welding, wherein in subsequent current passage in the test welding, current passage is performed by constant current control under a condition: 0.5 ≤ Vtp/Vtm ≤ 2.0 when tc < 800 ms; 0.5 - 0.3 × (tc - 800)/800 ≤ Vtp/Vtm ≤ 2.0 - 0.5 × (tc - 800)/800 when 800 ms ≤ tc < 1600 ms; and 0.2 ≤ Vtp/Vtm ≤ 1.5 when tc ≥ 1600 ms, where Vtm is an average value of a voltage between the electrodes in main current passage in the test welding, and Vtp is an average value of a voltage between the electrodes in the subsequent current passage in the test welding, and wherein in main current passage in the actual welding, adaptive control welding is performed, and in subsequent current passage in the actual welding, current passage is performed by constant current control under a condition: 0.8 × Itp ≤ Imp ≤ 1.2 × Itp, where Itp is a current in the subsequent current passage in the test welding, and Imp is a current in the subsequent current passage in the actual welding.