US 11,872,636 B2
Surface-coated cutting tool and method for manufacturing same
Hiroki Takeshita, Sorachi-gun (JP); Shuhei Misumi, Sorachi-gun (JP); Haruyo Fukui, Sorachi-gun (JP); Shinya Imamura, Sorachi-gun (JP); and Kazuhiro Hirose, Sorachi-gun (JP)
Assigned to Sumitomo Electric Hardmetal Corp., Itami (JP)
Appl. No. 15/567,149
Filed by SUMITOMO ELECTRIC HARDMETAL CORP., Itami (JP)
PCT Filed Mar. 2, 2017, PCT No. PCT/JP2017/008300
§ 371(c)(1), (2) Date Oct. 17, 2017,
PCT Pub. No. WO2017/169498, PCT Pub. Date Oct. 5, 2017.
Claims priority of application No. 2016-063935 (JP), filed on Mar. 28, 2016.
Prior Publication US 2018/0099335 A1, Apr. 12, 2018
Int. Cl. B23B 27/14 (2006.01); C23C 14/32 (2006.01); C23C 14/35 (2006.01); C23C 14/06 (2006.01); C23C 30/00 (2006.01); C23C 28/00 (2006.01); C23C 28/04 (2006.01); C23C 14/02 (2006.01); C23C 14/00 (2006.01); B23F 21/00 (2006.01); B23G 5/06 (2006.01)
CPC B23B 27/14 (2013.01) [C23C 14/0021 (2013.01); C23C 14/024 (2013.01); C23C 14/0641 (2013.01); C23C 14/0664 (2013.01); C23C 14/325 (2013.01); C23C 14/35 (2013.01); C23C 28/044 (2013.01); C23C 28/42 (2013.01); C23C 28/44 (2013.01); C23C 30/005 (2013.01); B23B 2228/105 (2013.01); B23F 21/00 (2013.01); B23G 5/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A surface-coated cutting tool comprising a base material and a coating film formed on a surface of the base material,
the coating film including a first alternating layer and a second alternating layer formed on the first alternating layer,
each of the first alternating layer and the second alternating layer having a cubic crystal structure,
the first alternating layer including first and second layers,
the second alternating layer including third and fourth layers,
one or a plurality of the first layers and one or a plurality of the second layers being layered alternately,
one or a plurality of the third layers and one or a plurality of the fourth layers being layered alternately,
each of the one or plurality of the first layers being composed of a nitride or carbonitride of AlaCrbM11-a-b, respective atomic ratios of the metal atoms in the first layer satisfying 0.5≤a≤0.9, 0≤b≤0.4, and 0≤1−a−b≤0.1,
each of the one or plurality of the second layers being composed of a nitride or carbonitride of AlcTidM21-c-d, respective atomic ratios of the metal atoms in the second layer satisfying 0.35≤c≤0.7, 0.3≤d≤0.7, and 0≤1−c−d≤0.1,
each of the one or plurality of the third layers being composed of a nitride or carbonitride of AleTifM31-e-f, respective atomic ratios of the metal atoms in the third layer satisfying 0.35≤e≤0.7, 0.3≤f≤0.7, and 0≤1−e−f≤0.1,
each of the one or plurality of the fourth layers being composed of a nitride or carbonitride of AlgTihM41-g-h, respective atomic ratios of the metal atoms in the fourth layer satisfying 0.35≤g≤0.7, 0.3≤h≤0.7, and 0≤1−g−h≤0.1,
the atomic ratio e of Al in the third layer and the atomic ratio g of Al in the fourth layer satisfying 0.05≤|g−e|≤0.2,
the atomic ratio f of Ti in the third layer and the atomic ratio h of Ti in the fourth layer satisfying 0.05≤|h−f|≤0.2,
each of the M1, the M2, the M3, and the M4 being one or more elements selected from a group consisting of a group 4 element, a group 5 element, a group 6 element except Cr and Ti in a periodic table, Si, and B, wherein
the coating film includes an adhesion layer at the base material side relative to the first alternating layer,
the adhesion layer is in contact with a lowermost layer of the first alternating layer,
the adhesion layer has a thickness of not less than 0.5 nm and not more than 20 nm,
the adhesion layer is a carbide, nitride, or carbonitride including all of W, Cr, Ti and Al,
an uppermost layer of the first alternating layer is the second layer, and
the lowermost layer of the first alternating layer is the second layer.