	US 12,390,861 B2
	Coated cutting tool
Susanne Norgren, Vastberga (SE); and Bartek Kaplan, Vastberga (SE)
Assigned to AB Sandvik Coromant, Sandviken (SE)
Appl. No. 17/415,434
Filed by AB SANDVIK COROMANT, Sandviken (SE)
PCT Filed Dec. 19, 2019, PCT No. PCT/EP2019/086238 § 371(c)(1), (2) Date Jun. 17, 2021, PCT Pub. No. WO2020/127684, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 1821450 (EP), filed on Dec. 20, 2018.
Prior Publication US 2022/0023954 A1, Jan. 27, 2022
Int. Cl. B23B 27/14 (2006.01); B22F 3/16 (2006.01); B22F 5/00 (2006.01); C23C 14/06 (2006.01); C23C 14/58 (2006.01); B22F 1/103 (2022.01)

CPC B23B 27/14 (2013.01) [B22F 3/164 (2013.01); B22F 5/00 (2013.01); C23C 14/0635 (2013.01); C23C 14/5806 (2013.01); B22F 1/103 (2022.01); B22F 2003/166 (2013.01); B22F 2005/001 (2013.01); B22F 2302/10 (2013.01); B22F 2302/20 (2013.01); B22F 2999/00 (2013.01); B23B 2224/20 (2013.01); B23B 2224/28 (2013.01); B23B 2224/36 (2013.01)]

14 Claims

1. A coated cutting tool being a metal cutting turning insert comprising a Cr-containing cemented carbide substrate comprising WC, a binder phase and a gamma phase, wherein the cemented carbide includes a gradient surface zone with a thickness of between 2 to 100 μm, which is binder phase enriched and depleted of gamma phase, wherein the cemented carbide comprises M₇C₃carbides in an amount of between 1.5 to 6 area % measured in a bulk of the substrate, and wherein M is elements comprising Cr, W and at least one binder metal.