KINETICS OF ELECTRIC DISCHARGE SINTERING OF HIGH-SPEED STEEL POWDERS

摘要

Electric discharge sintering of high-speed steel R6M5F3 is studied. It is shown that powder heating rate is mainly governed by the heat generated according to the Joule - Lenz rule and compaction may be described by equations that are valid for hot pressing. A new method is described for preparing billets for tools made from high-speed steel without some of the labor-intensive and expensive operations. This method combines electric discharge powder sintering with subsequent hot extrusion.