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
Estimating the term…
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.
Claims29
An article comprising:
- a cutting portion comprising cemented carbide including a binder and hard particles of tungsten carbide having an average grain size of 0.3 to 10 μm;
- a central axis;
- and
- a heat sink portion aligned with and intersected by the central axis, wherein the heat sink portion comprises a heat sink material having a thermal conductivity greater than a thermal conductivity of the cemented carbide, wherein the heat sink portion directly contacts the cutting portion and conducts heat from the cutting portion.
An article comprising:
- a cutting portion comprising a domed-shaped cutting surface and cemented carbide including a binder and hard particles of carbides of at least one transition metal selected from titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten;
- a central axis;
- and
- a heat sink portion coaxially aligned with and intersected by the central axis, wherein the heat sink portion comprises a heat sink material having a thermal conductivity greater than a thermal conductivity of the cemented carbide, wherein the heat sink portion directly contacts the cutting portion and conducts heat from the cutting portion.
An article comprising:
- a cutting portion comprising cemented carbide including a binder and hard particles of carbides of at least one transition metal selected from titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten;
- a body portion supporting the cutting portion;
- a central axis;
- and
- a heat sink portion at least partially disposed in a recess of the body portion and aligned with and intersected by the central axis, wherein the heat sink portion comprises a heat sink material having a thermal conductivity greater than a thermal conductivity of the cemented carbide, wherein the heat sink portion directly contacts the cutting portion and conducts heat from the cutting portion, the heat sink portion forming a mechanical seal with the recess and defining a void within the body portion, the heat sink portion further comprising a powder within the void.
An article comprising:
- a cutting portion comprising cemented carbide including a binder and hard particles of carbides of at least one transition metal selected from titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten;
- a central axis;
- and
- a heat sink portion aligned with and intersected by the central axis, wherein the heat sink portion comprises a first dispersed phase comprising hard particles, a first continuous phase comprising binder wherein the hard particles are dispersed within the first continuous phase and a second continuous phase comprising a heat sink material, the heat sink material having a thermal conductivity greater than a thermal conductivity of the cemented carbide, wherein the heat sink portion directly contacts the cutting portion and conducts heat from the cutting portion.
Dependencies are inferred from the claim text.