Disk-type milling cutters with working elements made of powder high-speed steel. I. Technology for making semifinished products for the cutters

A technology is developed for making monometallic and bimetallic compacts for the production of disk-type milling cutters based on powder high-speed steel. The main operation in the technology is the hot upsetting of porous ring-shaped semifinished products, with the material flowing toward the center of the product. The article describes the methods used to fabricate the compacts from powder high-speed steel and protect against oxidation during heating, as well as the design of a disk-type milling cutter with a replaceable bimetallic ring. The requirements of the main manufacturing operations are presented.