Abrégé

A surface-covered CBN sintered body tool (1) includes a base material (2) formed with a cubic boron nitride (CBN) sintered body and a surface covering film (3) covering a surface of the base material (2), and has a nega-land (4) exposing the CBN sintered body in at least a portion thereof and a flank (5) having the surface covering film (3) formed thereon. With this, the surface-covered CBN sintered body tool (1) having high defect resistance and wear resistance can be provided. The surface covering film (3) preferably includes a nitride or a carbonitride of a compound including at least one element selected from the group consisting of Ti, Cr, Zr, and V and at least one element selected from the group consisting of Al, Si and B, or a nitride or a carbonitride of Ti.

Classes IPC  ?

• B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
• B23B 27/20 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier à éléments tranchants constitués par des diamants
• B23P 15/28 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe d'outils de coupe
• C23C 14/06 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement caractérisé par le matériau de revêtement

Abrégé

A cubic boron nitride sintered body, which provides both superior chipping resistance and wear resistance. The cubic boron nitride (cBN) sintered body contains cubic boron nitride particles and a bonding material for bonding the cBN particles to one another. This sintered body comprises cBN particles in a range from 70 vol% to 98 vol%, and a bonding material made from a Co compound, an Al compound and WC, and a solid solution of these. The cBN particles in the sintered body contain 0.03 wt% or less of Mg, and 0.001 wt% to 0.05 wt% of Li. The cubic boron nitride sintered body may also have a composition in which the bonding material is an Al compound.

Classes IPC  ?

• C22C 29/16 - Alliages à base de carbures, oxydes, borures, nitrures ou siliciures, p. ex. cermets, ou d'autres composés métalliques, p. ex. oxynitrures, sulfures à base de nitrures

Abrégé

The present high-strength, highly thermally conductive sintered compact of cubic boron nitride contains cubic boron nitride (cBN) grains and a binder binding the grains. More specifically, it is formed of at least 40% by volume and at most 85% by volume of cBN grains, and a binder corresponding to the remainder and formed of at least one selected from the group consisting of a nitride, a carbide, a boride, and an oxide of an element belonging to the 4a, 5a and 6a groups of the periodic table and a solid solution thereof, an aluminum compound, and an unavoidable impurity, and the cBN grains contain at most 0.03% by mass of Mg and at least 0.001% by mass and at most 0.05% by mass of Li.

Classes IPC  ?

• C04B 35/5831 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base de non oxydes à base de borures, nitrures ou siliciures à base de nitrure de bore à base de nitrure de bore cubique