US 12,465,991 B2
Wear-resistant iron-based alloy compositions comprising nickel
Barbara Maroli, Höganäs (SE); Robert Frykholm, Ödåkra (SE); Sven Bengtsson, Höganäs (SE); and Karin Frisk, Enebyberg (SE)
Assigned to HÖGANÄS AB (PUBL), Höganäs (SE)
Appl. No. 16/973,545
Filed by Höganäs AB (Publ), Höganäs (SE)
PCT Filed Jun. 25, 2019, PCT No. PCT/EP2019/066834
§ 371(c)(1), (2) Date Dec. 9, 2020,
PCT Pub. No. WO2020/007652, PCT Pub. Date Jan. 9, 2020.
Claims priority of application No. 18181115 (EP), filed on Jul. 2, 2018.
Prior Publication US 2021/0246537 A1, Aug. 12, 2021
Int. Cl. B23K 9/04 (2006.01); B22F 1/05 (2022.01); B23K 35/02 (2006.01); B23K 35/30 (2006.01); B23K 103/04 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/08 (2006.01)
CPC B23K 9/042 (2013.01) [B22F 1/05 (2022.01); B23K 35/0244 (2013.01); B23K 35/3093 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/08 (2013.01); B23K 2103/04 (2018.08); Y10T 428/12951 (2015.01)] 22 Claims
OG exemplary drawing
 
1. An iron-based alloy composition consisting of:
boron (B): 1.6-2.4 wt. %;
carbon (C): 1.7-3.0 wt. %;
molybdenum (Mo): 16.0-19.5 wt. %;
nickel (Ni): more than 4 wt % and up to 6.5 wt %;
manganese (Mn): below 0.8 wt. %;
silicon (Si): more than 1 wt % and up to 3.0 wt. %;
vanadium (V): 10.8-13.2 wt. %;
chromium (Cr): up to 0.3 wt %; and
balanced with iron (Fe) and unavoidable impurities,
wherein the alloy has a microstructure comprising primary boride and eutectic matrix, wherein a ratio of an amount of primary boride by volume to an amount of eutectic matrix by volume is below 0.3.