High speed cutting tool material requirements

Because the cutting speed of high speed machining is 5 ~ 10 times that of conventional cutting, new requirements are put forward for tool material, tool structure and geometric parameters. The choice of tool material has an important impact on the processing efficiency, processing quality, cost and tool life. In addition to some basic properties of common tool materials, high speed cutting requires tool materials to have higher requirements, mainly including:

1. high hardness and wear resistance

The hardness of the cutting tool material for high speed machining must be higher than that of the tool material for ordinary machining, generally above HRC 60. The higher the hardness of the tool material, the better the wear resistance.

2. high strength and toughness

The cutting tool material should be of high strength and toughness to withstand cutting forces, vibration and impact and to prevent brittle fracture of the tool.

3. good thermal stability and thermal hardness

The cutting tool material should have good heat resistance, be able to withstand high temperatures, and have good oxidation resistance.

4. good high temperature mechanical properties

The cutting tool material should have high high temperature strength, high temperature hardness and high temperature toughness.

5. Small chemical affinity

The chemical affinity between tool materials and workpiece materials is smaller.