Method for manufacturing a body featuring very high mechanical properties, forming by cold drawing from a rolled steel sheet, in particular hot rolled and coated sheet

摘要

The procedure for making stamped components with very high mechanical properties from sheet steel consists of cutting the sheet to make blanks, stamping the blanks to form the components, and applying before or after stamping a metallic surface coating that provides protection against corrosion, against decarburisation of the steel, and an optional lubrication function. Surplus steel necessary for the stamping operation is removed by cutting. The surface coating can be of zinc or a zinc-based alloy between 5 and 30 mcm thick; it can be of zinc and iron or zinc-iron-aluminium, and the pre-coated steel can be subjected to a temperature of over 700 degrees C before stamping.