Surface decarburization of a drill bit having a refined primary

Details Surface decarburization of a drill bit having a refined primary Surface decarburization of a drill bit having a refined primary

1994-09-28

1997-05-13

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148514, 134 39, C23C 806

Patent

active

056288379

ABSTRACT:
A cutting tool is decarburized by placing the tool in a protective environment, heating in this environment to a temperature of 600.degree.-1100.degree. C., and maintaining this temperature for a period of 15-120 minutes. The cutting tool may be a cemented carbide microdrill which contains primary cutting edges which form an angular surface on the forward end of a rake surface at the cutting tip, and a radius surface which extends from the angular surface to a flank surface which extends from an outer diameter of the cutting tip to an axis of symmetry of the tool.

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