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US 4,343,651 AGranted
Sintered compact for use in a tool
AssigneeSumitomo Electric Industries, Ltd.
InventorsShuji Yazu, Akio Hara
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Abstract
An improved sintered compact for use in a cutting tool is proposed which comprises 80 to 95 volume % of high pressure form boron nitride, a binder material which is a carbide, a nitride and/or a carbonitride of a IVb and Vb transition metal in the periodic table, and aluminum compounds. It may further include copper and/or iron group metal or metals. The sintered compact obtained has high hardness even though the sintering pressure and temperature are relatively low.
Claims6
A sintered compact for use in a tool consisting essentially of:
- 80 to 95 volume % of high pressure form boron nitride having an average particle size of less than 10 microns,
- the balance being a matrix comprising at least one binder material selected from the group consisting of a carbide, a nitride, and a carbonitride of a IVb and Vb transition metal in the Periodic Table, mixtures thereof and their solid solution compounds;
- and aluminum compounds, wherein the content of aluminum in said matrix is 5 to 30 weight %, and wherein the particles in said matrix are of a size of less than one micron.
Dependencies are inferred from the claim text.