摘要:
The present joined product is a joined product with a cemented carbide sintered compact serving as a first material to be joined (1) and a cBN sintered compact serving as a second material to be joined (2), wherein: the first material to be joined (1) and the second material to be joined (2) are joined together via a joining material (3) disposed therebetween and containing titanium (Ti); and a titanium nitride (TiN) compound layer having a thickness of 10-300 nm is produced at an interface between the second material to be joined (2) and the joining material (3).
摘要:
A sintered body of the present invention is a sintered body including a first material and cubic boron nitride. The first material is partially-stabilized ZrO 2 including 5 to 90 volume % of Al 2 O 3 dispersed in crystal grain boundaries or crystal grains of partially-stabilized ZrO 2 .
摘要:
A sintered compact has a first material, a second material, and a third material The first material is cubic boron nitride. The second material is a compound including zirconium. The third material is an aluminum oxide and the aluminum oxide includes a fine-particle aluminum oxide. The sintered compact has a first region in which not less than 5 volume % and not more than 50 volume % of the fine-particle aluminum oxide is dispersed in the second material. On arbitrary straight lines in the first region, an average value of continuous distances occupied by the fine-particle aluminum oxide is not more than 0.08 µm and a standard deviation of the continuous distances occupied by the fine-particle aluminum oxide is not more than 0.1 µm.
摘要:
A sintered compact according to the present invention includes: a first material that is cubic boron nitride; a second material that is an oxide of zirconium; and a third material that is an oxide of aluminum, the second material including cubic ZrO 2 and ZrO, the third material including ±-Al 2 O 3 , and the sintered compact satisfying the following relation: 0.9 ‰¤ I zro 2 111 / I a 1 110 ‰¤ 30 ; and 0.3 ‰¤ I zro 111 / I a 1 110 ‰¤ 3 , where I a1 (110), I zro2 (111), and I zro (111) respectively represent X-ray diffraction intensities of a (110) plane of the ±-Al 2 O 3 , a (111) plane of the cubic ZrO 2 , and a (111) plane of the ZrO.
摘要:
A cubic boron nitride sintered body tool has, at least at a cutting edge, a cubic boron nitride sintered body composed of a cubic boron nitride particle and a binder phase. The content of cBN is not less than 20 volume % and not more than 60 volume %. The binder phase contains at least Al 2 O 3 and a Zr compound. On any straight line in the sintered body, the mean value of a continuous distance occupied by Al 2 O 3 is not less than 0.1 µm and not more than 1.0 µm, and the standard deviation of the continuous distance occupied by Al 2 O 3 is not more than 0.8. On the straight line, X/Y is not less than 0.1 and not more than 1 where X represents the number of points of contact between Al 2 O 3 and the Zr compound, and Y represents the sum of the number of points of contact between Al 2 O 3 and cBN and the number of points of contact between Al 2 O 3 and binder phase component(s) other than Al 2 CO 3 and the Zr compound. The Zr compound has an average particle size of not less than 0.01 µm and not more than 0.1 µm.
摘要:
In a pilot hole (21) of a workpiece (20) made of a difficult-to-cut cast iron, a cutting tool (10) having a leading end to which a cutting insert (11) is attached is inserted to cut the surface of the wall of the pilot hole (21). At this time, the cutting tool (10) rotates about an axis (±) and also revolves about another axis (²), so that contouring is performed on the workpiece (20) by the tool (10). The cutting insert (11) is formed of a sintered body having a CBN content of not less than 85% by volume, and the cutting insert (11) has a thermal conductivity of not less than 100 W/(mK).
摘要:
Hard composite material for tools, comprising a substrate of CBN sintered body containing more than 20 % by volume of cubic boron nitride or diamond sintered body containing more than 40 % by volume of diamond. The substrate has at least one layer of hard heat-resisting film consisting mainly of Ti, Al and at least one element selected from a group comprising C, N and O on a portion or portions of said substrate where cutting participate. Improved in strength of base material, wear-resistance and oxidation-resistance, less reactive with iron and showing longer tool life comparing to known cutting tools and usable in wider applications such as hardened steel, cast ion and simultaneous cutting of cast ion and aluminum alloy.
摘要:
A sintered body includes a first hard particle, a second hard particle, and a binder. The first hard particle is an M sialon particle having a coating layer. The M sialon particle is represented by M x Si (6-x-z) Al z O z N (8-z) (in the formula, M is a metal containing at least one selected from the group consisting of calcium, strontium, barium, scandium, yttrium, lanthanoid, manganese, iron, cobalt, nickel, copper, and group IV, group V, and group VI elements of the periodic table, and relationships of 0.01 ‰¤ x ‰¤ 2, 0.01 ‰¤ z ‰¤ 4.2, and 1.79 ‰¤ (6 - x - z) ‰¤ 5.98 are satisfied). The second hard particle is a cubic boron nitride particle.
摘要:
A cutting insert including a surface involved in cutting, for which a cutting tool material of a hard sintered body is used. A radius of a nose R portion is 0.4 mm or greater and 2.4 mm or less, an apex angle ± of the nose R portion is 50° or greater and 95° or less, a rake angle ² at a position of a bisecting plane of the apex angle of the nose R portion is 1° or greater and 10° or less, a chamfer provided in a cutting edge portion is a negative land with unequal width, and at least on one side of the negative land with respect to a boundary which is an apex of a nose R portion cutting edge, a width of the negative land gradually decreases from the apex of the nose R portion cutting edge to a position at which the nose R portion cutting edge is connected to a linear cutting edge. Let W1 be the width of the negative land at the apex of the nose R portion cutting edge, and W2 be the width of the negative land at both ends of the nose R portion cutting edge, then the W1 is 0.04 mm or greater and 0.2 mm or less, and a ratio of the W1 1 to the W2 is 1.5 or greater.