Abstract
Large-scale production of parts from powders and powder steels, in which parts are shaped in presses is considered. The three processes for production of the parts are analyzed. At two of them preforms are formed from the powder, they are sintered and the parts are punched from the sintered preforms. In the first process is used hot forging, in the second process used cold forging. The advantage of cold forging is demonstrated. The durability of the tool during cold forming is not sufficient to produce of parts from powder steels. The ways to reduce of stresses in the tool are described. The third process comprises forming from powder of the final shape parts and their sintering. Such process is applied for parts from powder steels. However in this process the parts have large porosity, which reduces their strength and reduces the efficiency of heat treatment. The method for reducing of the parts porosity as they are formed is described.
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