Improved Tolerances by Optimized Powder Mixes
PM2004, in Vienna, Austria. Authors: Mats Larsson, Daniel Edman. Dimensional stability is a prerequisite to produce net-shape P/M components. Improved dimensional stability will make the P/M route even more cost competitive compared to competing manufacturing techniques. Diffusion bonded powders and chemically bonded mixes are means to reduce dimensional scatter due to segregation of alloying elements. By utilizing specific bonding substances chemically bonded mixes exhibit superior flow properties that facilitate even filling of the die cavity in the press. In this presentation results are presented from a study comprising different mix compositions, type of alloying additives and use of bonded mixes, pointing out ways to improve dimensional stability.
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