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AssigneeMitsubishi Materials Corporation
InventorsFumihiro Ueda, Tadakazu Oohashi
Estimating the term…
A cutting tool blank formed of material having a composition comprising of 0.1 to 20 wt % of BaCO.sub.3 and/or MgCO.sub.3, and/or 0.05 to 10 wt % of CaMg(CO.sub.3).sub.2 or CaCO3, the balance being preferably substantially diamond forming a matrix is heated and maintained at a temperature of 800.degree. to 1400.degree. C. in a vacuum to change, by chemical reaction, the above BaCO.sub.3 and/or MgCO.sub.3, and/or CaMg(CO.sub.3).sub.2 or CaCO.sub.3 into 0.05 to 13% of BaO and/or MgO and/or 0.02 to 5% of CaO, and to form pores. In this manner, a cutting tool formed of a diamond-based ultra-high-temperature-sintered material having a structure in which BaO, MgO and/or CaO are distributed finely and uniformly in a diamond matrix is obtained.
A cutting tool made of a diamond-based ultra-high-pressure-sintered material having excellent chipping resistance, said material comprising from 0.05 to 13 wt % of at least one of barium oxide and magnesium oxide, and diamond which forms a matrix, said material having a theoretical density percentage of 96 to 99.5% and a structure wherein pores and said at least one of barium oxide and magnesium oxide are distributed throughout the diamond matrix.
A cutting tool made of a diamond-based ultra-high-pressure-sintered material having excellent chipping resistance, said material comprising at least one of barium oxide and magnesium oxide, calcium oxide, and diamond which forms a matrix, the total content of barium oxide and magnesium oxide being from 0.05 to 13 wt %, the content of calcium oxide being 0.02 to 5 wt %, said material having a theoretical density percentage of 96 to 99.5% and a structure in which pores and said content of at least one of barium oxide and magnesium oxide, and said calcium oxide, are distributed throughout the diamond matrix.
A cutting tool made of a diamond-based, ultra-high-pressure-sintered material having excellent chipping resistance, said material consisting essentially of from 0.05 to 13 wt % of at least one of barium oxide and magnesium oxide, and diamond which forms a matrix, said material having a theoretical density percentage of 96 to 99.5% and a structure wherein pores and said at least one of barium oxide and magnesium oxide are distributed throughout the diamond matrix.
A cutting tool made of a diamond-based, ultra-high-pressure-sintered material having excellent chipping resistance, said material consisting essentially of at least one of barium oxide and magnesium oxide, calcium oxide, and diamond which forms a matrix, the total content of barium oxide and magnesium oxide being from 0.05 to 13 wt %, the content of calcium oxide being 0.02 to 5 wt %, said material having a theoretical density percentage of 96 to 99.5% and a structure in which pores and said content of at least one of barium oxide and magnesium oxide, and said calcium oxide, are distributed throughout the diamond matrix.
Dependencies are inferred from the claim text.