Patent ID: 8173063
Filing Date: 2012-05-08
Classification: B22F,H01M,Y02E

Abstract:
1. A process for producing a molding with a basic body having a multiplicity of elevations merging into the basic body with inclined side surfaces, the method which comprises the following steps: providing a powdery alloy having at least 20% by weight of chromium component and pressing the powdery alloy in a two-stage pressing operation with a first pressing stage and a second pressing stage; and in the first pressing stage, pressing boundary surfaces of the basic body to near final shape as far as transition regions of the elevations and simultaneously pressing the elevations to an oversize, defined with a projection height h′ from the basic body being greater than a projection height h from the basic body in a finally pressed state by 10%-150%, and with side surfaces of the elevations enclosing an angle of inclination α′ in a range from 90°-150° with a respectively adjacent boundary surface of the basic body, and in the second pressing stage, pressing the elevations to near final shape, with the angle of inclination α′ increased to a value α in a range from 95°-170°; and subsequently sintering the basic body to produce the molding.