1. Advantages of high strength sheet
Under the current trend of lightweight vehicles, high-strength and super-high-profile panels have been widely used. High-strength panels made by hot stamping technology can reduce the strength of the workpieces. The thickness reduces the quality. According to relevant information, Arcelor (the world's largest steel company), its cooling hardened steel 30MnB5, after cooling, its strength will be increased to 1400MPa, if the automotive parts made with this steel, and Compared to parts with the same stiffness and strength, they are much lighter.
2. Basic process of hot stamping of high strength sheet
According to a series of related parameters, such as the thickness of the sheet, the flow stress of the high-strength sheet during the heating process, the size of the forming part, etc., the pressure required for the forming process of the sheet is accurately calculated, and then the tonnage required for the equipment is given. Be clear and then shape it later. The basic process of hot stamping of sheet metal is as follows: blanking, preforming, heating, stamping, holding (guaranteeing the shape of the workpiece), descaling, laser trimming, and oiling.
Parts made by the hot stamping forming process tend to have a scale on the surface and should be effectively treated. Among them, the scale can be treated by pickling, and in the cleaning process, problems and defects which cannot be found by other cleaning methods can be found, and a relatively high quality surface can be obtained.