HIGH DENSITY PM COMPONENTS BY HIGH VELOCITY COMPACTION

摘要

High Velocity Compaction (HVC) is a compaction method that enables high density and the possibility to make large P/M parts weighing up to more than ten pounds. The powder is compacted in less than 20 milliseconds by high-energy impact. Further densification is possible by adding multiple impacts as short as 300 milliseconds after each other. High Velocity Compaction is a mass-production method that can expand the use of P/M beyond its present limitations. High Velocity Compaction can be used in cases where components would require such high compaction force that the tonnage of conventional presses is a limitation. This paper describes and discusses High Velocity Compaction. Properties of materials based on both pre-alloyed Astaloy powders and diffusion-alloyed grades at densities in the range of 7.4 -7.7 g/cm~3 are presented. This new manufacturing technology was recently introduced for P/M and examples are given of components that can be produced.