US 11,859,270 B2
Non-magnesium process to produce compacted graphite iron (CGI)
Srikanth Sivaraman, Hosur (IN); Gowri Subhramanyam, Hosur (IN); Nadimuthu Srinivasan, Hosur (IN); and Harisankar Radhakrishnan, Hosur (IN)
Assigned to SNAM ALLOYS PVT LTD, Hosur (IN)
Appl. No. 16/332,409
Filed by SNAM ALLOYS PVT LTD, Hosur (IN)
PCT Filed Sep. 12, 2017, PCT No. PCT/IB2017/055473
§ 371(c)(1), (2) Date Mar. 12, 2019,
PCT Pub. No. WO2018/047134, PCT Pub. Date Mar. 15, 2018.
Claims priority of application No. 201641031017 (IN), filed on Sep. 12, 2016.
Prior Publication US 2021/0087658 A1, Mar. 25, 2021
Int. Cl. C22C 33/08 (2006.01); B22D 1/00 (2006.01); C22C 37/10 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01)
CPC C22C 33/08 (2013.01) [B22D 1/00 (2013.01); C22C 37/10 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A non-magnesium process to produce compacted graphite iron comprising by placing a treatment alloy into a treatment ladle, placing an inoculant there over in the treatment ladle and pouring a molten base metal there over, wherein said treatment alloy comprises iron, silicon and lanthanum, wherein the lanthanum is 3-30% by weight of the treatment alloy, and silicon is 40-50% by weight of the treatment alloy, wherein the treatment alloy optionally comprises at least one of calcium and aluminum in a range of 0.5-3% each by weight of the treatment alloy, and the rest of the treatment alloy is iron, and required additional percentage of said treatment alloy is 0.4-2% by weight of composition of said base metal, and said inoculant is 0.1-0.5% by weight of the composition, wherein the inoculant optionally is a ferrosilicon composition comprising at least one of calcium, aluminum, barium or lanthanum, or combination thereof.