Patent ID: 7520039

Claim:
A method for production of a treated one-piece steel casting, the method comprising the steps of: providing a high-quality steel blank or a cut-to-size blank capable of being deep-drawn of a thickness of a material of 1 mm to 1.2 mm; producing the steel casting by deep-drawing, punching and rolling the high-quality steel blank or the cut-to-size blank in immediately successive method steps; aftertreating the steel casting immediately following the producing of the steel casting, the aftertreating performed within a drum including ceramic particles in a rotary motion, the ceramic particles having a diameter of a grain size that is less than twice a radius of at least one of a rounded convex surface area or a rounded concave surface area of the steel casting; and selecting at least one of an aftertreatment time or a number of revolutions of the drum as a function of at least one of the thickness of the material or a size of a surface of the steel casting.