| 摘要 |
A high-strength steel sheet has excellent workability, excellent phosphatability, and excellent corrosion resistance after electrodeposition coating has been performed, even when the contents of Si and Mn are high. Condition 1 through Condition 3 below are used when continuous annealing is performed on a steel sheet. Condition 1: In a heating process of continuous annealing, a steel sheet is heated at a heating rate of 7° C./s or more in a temperature range in an annealing furnace of 450° C. or higher and A° C. or lower (A: 500≦A). Condition 2: The maximum end-point temperature of a steel sheet is 600° C. or higher and 750° C. or lower in continuous annealing. Condition 3: In a steel sheet temperature range of 600° C. or higher and 750° C. or lower in continuous annealing, the traveling time of the steel sheet through the temperature range is 30 seconds or more and 10 minutes or less, and the dew point of the atmosphere is −10° C. or higher in the temperature range. |
