	US 12,215,396 B2
	Iron-based alloy and method of manufacturing the same
Kenta Yamanaka, Sendai (JP); and Akihiko Chiba, Sendai (JP)
Assigned to TOHOKU UNIVERSITY, Sendai (JP)
Appl. No. 17/272,881
Filed by TOHOKU UNIVERSITY, Sendai (JP)
PCT Filed Sep. 2, 2019, PCT No. PCT/JP2019/034481 § 371(c)(1), (2) Date Mar. 2, 2021, PCT Pub. No. WO2020/050229, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 2018-165465 (JP), filed on Sep. 4, 2018.
Prior Publication US 2021/0317541 A1, Oct. 14, 2021
Int. Cl. C21D 6/00 (2006.01); C22C 33/08 (2006.01); C22C 37/08 (2006.01); C22C 38/22 (2006.01); C22C 38/44 (2006.01)

CPC C21D 6/004 (2013.01) [C22C 33/08 (2013.01); C22C 37/08 (2013.01); C22C 38/22 (2013.01); C22C 38/44 (2013.01); C21D 2211/008 (2013.01)]

9 Claims

1. An iron-based alloy comprising Cr: 10 to 22 mass %, W: 1 to 12 mass %, C: 0.50 to 2.3 mass %, and Cu: 0.5 to 6 mass %, with the remainder being unavoidable impurities and Fe, and having a structure composed mainly of martensite in which M₂₃C₆-type carbides are precipitated, and having a dislocation density of 0.2×10¹⁶m⁻²or more and a Vickers hardness of HV 380 or more.