Common tool materials in tool grinding include high-speed steel (HSS), powder metallurgy high-speed steel PM-HSS, hard alloy (HM), and superhard materials such as PCD and CBN. High speed steel cutting tools are sharp and have good toughness, while hard alloy cutting tools have high hardness but poor toughness. The density of hard alloy cutting tools is significantly higher than that of high-speed steel cutting tools. These two materials are the main materials for drill bits, cutters, milling cutters, and taps. The performance of powder metallurgy high-speed steel is between the above two materials, mainly used for manufacturing rough milling cutters and taps.
High speed steel cutting tools are less sensitive to collisions due to their good material toughness. However, hard alloy cutting tools have high hardness and brittleness, are sensitive to collisions, and the cutting edge is prone to bouncing. Therefore, during the grinding process, it is necessary to be very careful with the operation and placement of hard alloy cutting tools to prevent collisions or tool drops between the tools.
