Improving in quality of products during extrusion of parts type of cups made of sintered iron-based powder preforms

Abstract

Large-scale production of parts made of iron powders and powder steels, in which parts are shaped in presses, is considered. Preforms are formed from the powder, then are sintered and the items are punched from the sintered preforms. The advantage of cold forging is demonstrated. The durability of the tool during cold forming is not sufficient to produce parts from powder steels. The way to reduce stress in the tool is described. The items had large porosity due this process. The method of porosity reduction of the parts as they are formed is described. The design of stamp is given.