Back to results
US 10,870,154 B2Granted
Sintered body and cutting tool
AssigneeSumitomo Electric Industries, Ltd.
InventorsKentaro Chihara, Satoru Kukino
Life of this patent
Estimating the term…
Abstract
A sintered body includes cubic boron nitride grains as hard phase grains, and has a thermal conductivity of less than 20 W·m−1·K−1, for cutting a nickel-based heat-resistant alloy formed of crystal grains having a coarse grain size represented by a grain size number of 5 or less defined by ASTM standard E112-13. A cutting tool includes this sintered body. Accordingly, the sintered body having high fracture resistance in addition to high wear resistance, as well as the cutting tool including the sintered body are provided.
Claims8
A method for manufacturing a cut material, the method comprising:
- preparing a nickel-based heat-resistant alloy formed of crystal grains having a coarse grain size represented by a grain size number of 5 or less defined by American Society for Testing and Materials standard E112-13;
- and
- cutting the nickel-based heat-resistant alloy by using a sintered body comprising cubic boron nitride grains as hard phase grains and having a thermal conductivity of less than 15 W·m−1·K−1, wherein
- the sintered body further comprises:
- a binder;
- different-type hard phase grains including at least one selected from the group consisting of silicon nitride, SiAlON, and alumina, as the hard phase grains other than the cubic boron nitride grains, and
- a ratio VBN/VH of a volume VBN of the cubic boron nitride grains to a volume VH of the different-type hard phase grains is not less than 0.5 and not more than 1.5.
4 more elements
Dependencies are inferred from the claim text.