US 12,168,820 B2
High strength and corrosion resistant ferrochrome alloy bulk and article comprising the same
Jien-Wei Yeh, Hsinchu (TW)
Assigned to NATIONAL TSING HUA UNIVERSITY, Hsinchu (TW)
Filed by National Tsing Hua University, Hsinchu (TW)
Filed on Jul. 27, 2021, as Appl. No. 17/385,990.
Claims priority of application No. 110124028 (TW), filed on Jun. 30, 2021.
Prior Publication US 2023/0002868 A1, Jan. 5, 2023
Int. Cl. C22C 35/00 (2006.01); C22C 1/03 (2006.01)
CPC C22C 35/005 (2013.01) [C22C 1/03 (2013.01)] 3 Claims
 
1. A high strength and corrosion resistant ferrochrome alloy bulk, being made by sequentially applying a melting process of raw materials in a crucible and a solidification process to cast as an ingot, so as to have a hardness greater than HV400 but lower than HV900; wherein the high strength and corrosion resistant ferrochrome alloy bulk consists of, in weight percent:
39-68% Cr;
2.5-5.5% Ni;
2.5-6% C;
at most 4.5% M; and
the balance Fe;
wherein M consists of at least one additive element that is selected from a group consisting of B, Al, Si, Sn, Ti, V, Mn, Co, Cu, Zr, Nb, and Mo, and a summation of B, AL, Si, Sn, Ti, V, Mn, Co, Cu, Zr, Nb, and Mo content is less than or equal to 4,5%;
wherein a Fe/Ni ratio is in a range from 6 to 10, and a Cr/C ratio being in a range between 10 and 20; and
wherein in case of M including Si, a content of Si being smaller or equal to 1.5%.