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METHOD FOR MANUFACTURING HOT STAMPED BODY HAVING VERTICAL WALL, AND HOT STAMPED BODY HAVING VERTICAL WALL
METHOD FOR MANUFACTURING HOT STAMPED BODY HAVING VERTICAL WALL, AND HOT STAMPED BODY HAVING VERTICAL WALL
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机译:具有竖直壁的热压车身的制造方法以及具有竖直壁的热压车身的制造方法
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摘要
The present invention provides a method for manufacturing a hot stamped body having a vertical wall, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac 1 °C and lower than Ac 3 °C; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660°C at a cooling rate of equal to or less than 10 °C/s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550°C to 660°C for one minute to 10 minutes.
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