| 摘要 |
PURPOSE: A method for manufacturing automobile parts by direct conduction heating is provided which greatly reduces the number of processes by excluding existing welding process and obtains effects of weight lightening and cost reduction by excluding stiffener, thereby reducing the number of parts. CONSTITUTION: The method for manufacturing automobile parts by direct conduction heating comprises the processes of forming a high tensile strength steel sheet using a press; and heat treating a position of the formed steel sheet to which stiffener is welded by direct conduction heating so that rigid martensite structure and soft matrix structure are mixed at the heat treated part, wherein the heat treatment process by the direct conduction heating is performed at a temperature of 900 deg.C or more, and wherein the high tensile strength steel sheet is 38 to 55 kgf/mm¬2 class high tensile strength steel sheet.
|
