Articles having improved resistance to thermal cracking
AssigneeKennametal Inc.
InventorsPrakash K. Mirchandani, Alfred J. Mosco, Eric W. Olsen, Steven G. Caldwell
Life of this patent
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Abstract
An article includes a working portion including cemented carbide, and a heat sink portion in thermal communication with the working portion. The heat sink portion includes a heat sink material having a thermal conductivity greater than a thermal conductivity of the cemented carbide. Also disclosed are methods of making an article including a working portion comprising cemented carbide, and a heat sink portion in thermal communication with the working portion and including a heat sink material having a thermal conductivity that is greater than a thermal conductivity of the cemented carbide. The heat sink portion conducts heat from the working portion.
Claims15
A cutting insert for metal working comprising:
- a first cutting portion comprising a cemented carbide including a binder in which are dispersed hard particles of at least one of titanium carbide, chromium carbide, vanadium carbide, zirconium carbide, hafnium carbide, tantalum carbide, molybdenum carbide, niobium carbide, and tungsten carbide;
- a second cutting portion comprising a cemented carbide including a binder in which are dispersed hard particles of at least one of titanium carbide, chromium carbide, vanadium carbide, zirconium carbide, hafnium carbide, tantalum carbide, molybdenum carbide, niobium carbide, and tungsten carbide;
- a first heat sink region contacting the first cutting portion, and a second heat sink region contacting the second cutting portion;
- wherein the first heat sink region comprises a heat sink material having a thermal conductivity greater than a thermal conductivity of the first cutting portion and is adapted to conduct heat from the first cutting portion;
- and
- wherein the second heat sink region comprises a heat sink material having a thermal conductivity greater than a thermal conductivity of the second cutting portion and is adapted to conduct heat from the second cutting portion;
- and
- wherein the cutting insert is an indexable cutting insert.
Dependencies are inferred from the claim text.