Self-sharpening cutting device with gradually phased materials

A self-sharpening drill bit, comprising:

• an axis of rotation;
• a proximal end including a shank;
• a distal end including a tip, the tip comprising:
• at least one major cutting edge;
• a first land extending in a first circumferential direction and a first axial direction from the at least one major cutting edge and ending at a heel;
• a flute section including:
• at least one flute extending from the tip;
• a minor cutting edge arranged at a first side of the at least one flute;
• and
• a second land arranged at a second side of the at least one flute, opposite the first side;
• wherein:
• the self-sharpening drill bit comprises a plurality of layers arranged in a first circumferential direction from the major cutting edge to the first heel and/or the minor cutting edge to the second heel;
• each layer of the plurality of layers comprises a material hardness;
• and
• the material hardness of each layer decreases in the first circumferential direction.

A self-sharpening cutting tool configured to form a hole in a substrate, comprising:

• a first side;
• a second side;
• a cutting edge, the first side and the second side forming the cutting edge;
• and
• a functionally graded material gradually decreasing in hardness in a direction away from the cutting edge.