초록 ▼

A sintered body for high-accuracy working tools is obtained by sintering powder mixture containing at least 45 percent by volume and not more than 60 percent by volume of cubic boron nitride powder having an average particle size of not more than 2 mz, Ti(C1-xNx)z, (Ti,M) (C1-xNx )z and (Ti,M)Nz, wh

A sintered body for high-accuracy working tools is obtained by sintering powder mixture containing at least 45 percent by volume and not more than 60 percent by volume of cubic boron nitride powder having an average particle size of not more than 2 mz, Ti(C1-xNx)z, (Ti,M) (C1-xNx )z and (Ti,M)Nz, where M represents transition metal element or elements belonging to any of the groups IVa, Va and/or VIa of the periodic table excluding wherein z is within the range 0.45≤z≤0.65 and x is within the range of 0.50≤x<1.0. A sintered body is obtained which is excellent in strength and improved in wear resistance and useful as a material for making high-accuracy cutting tools.

대표청구항 ▼

A sintered body for high-accuracy working tools obtained by sintering a powder mixture containing at least 45 percent by volume and not more than 60 percent by volume of cubic boron nitride powder having an average particle size of not more than 2 m5 percent by weight and not more than 15 percent by

A sintered body for high-accuracy working tools obtained by sintering a powder mixture containing at least 45 percent by volume and not more than 60 percent by volume of cubic boron nitride powder having an average particle size of not more than 2 m5 percent by weight and not more than 15 percent by weight of Al, at least 2 percent by weight and not more than 20 percent by weight of W and at least 1 percent by weight and not more than 10 percent by weight of one or more iron group metals and including a binder remainder formed of one or more Ti compounds selected from a group consisting of TiNz, Ti(C1-xNx)z, (Ti,M)(C1-xNx)z and (Ti,M)Nz, where M represents a transition metal element or elements belonging to any one of groups IVa, Va and VIa of the periodic table excluding Ti, wherein z is within the range of 0.45 to 0.65 and x is within the range of 0.50 to 1.0, containing said W in the form of at least one of said Ti compounds, WC and W, the atomic ratio of contained Ti to said transition metal element or elements belonging to any one of group IVa, Va and VIa of the periodic table including T, being at least ⅔and not more than 97/100, and wherein cubic boron nitride crystals of not more than 2 m