	US 12,276,011 B2
	Lightweight cemented carbide
Nuria Cinca I Luis, Barcelona (ES); Laura Larrimbe, Barcelona (ES); Jose Maria Tarrago, Barcelona (ES); and Stefan Ederyd, Saltsjo-Boo (SE)
Assigned to HYPERION MATERIALS & TECHNOLOGIES, INC., Worthington, OH (US)
Appl. No. 17/425,403
Filed by HYPERION MATERIALS & TECHNOLOGIES, INC., Worthington, OH (US)
PCT Filed Jan. 23, 2020, PCT No. PCT/EP2020/051668 § 371(c)(1), (2) Date Jul. 23, 2021, PCT Pub. No. WO2020/152291, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 1900988 (GB), filed on Jan. 24, 2019.
Prior Publication US 2022/0098710 A1, Mar. 31, 2022
Int. Cl. C22C 29/02 (2006.01); C22C 1/051 (2023.01); C22C 29/00 (2006.01); B22F 3/16 (2006.01)

CPC C22C 29/02 (2013.01) [C22C 1/051 (2013.01); C22C 29/005 (2013.01); B22F 3/16 (2013.01); B22F 2301/15 (2013.01); B22F 2302/10 (2013.01); B22F 2302/15 (2013.01); B22F 2302/20 (2013.01); B22F 2998/10 (2013.01)]

15 Claims

1. A cemented carbide, comprising:

a hard phase comprising WC, the WC being present in an amount of from 50 to 70 wt. % based on a total weight of the cemented carbide;

a binder phase comprising Co, Ni, Fe, Mo, and Cr, the Cr being present in an amount of from 0.2 wt. % to 0.6 wt. % based on a total weight of the cemented carbide; and

a gamma phase comprising at least one metal carbide in combination with at least one metal nitride and/or metal carbonitride,

wherein a quotient of an average grain size of the WC/an average grain size of the gamma phase is in a range of from 0.5 to 1.5, and

wherein the cemented carbide has a fracture toughness in a range of from 10 MPa m^1/2to 11 MPa m^1/2.