Invention Grant
- Patent Title: Heat resistant spheroidal graphite cast iron, method of manufacturing the same and engine exhaust system part including the same
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Application No.: US15125477Application Date: 2015-02-06
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Publication No.: US10294550B2Publication Date: 2019-05-21
- Inventor: Young-Kyu Ju , Ki-Hwan Jung , Jong-Kwon Chung , Sik Yang , Jae-Hyoung Hwang , Dong-Seob Shim , Sang-Beom Kim
- Applicant: Doosan Infracore Co., Ltd.
- Applicant Address: KR Incheon
- Assignee: DOOSAN INFRACORE CO., LTD
- Current Assignee: DOOSAN INFRACORE CO., LTD
- Current Assignee Address: KR Incheon
- Agency: K&L Gates LLP
- Priority: KR10-2014-0028909 20140312
- International Application: PCT/KR2015/001253 WO 20150206
- International Announcement: WO2015/137627 WO 20150917
- Main IPC: C22C37/10
- IPC: C22C37/10 ; C22C37/06 ; C22C33/08 ; G01N25/00 ; B22D25/02 ; F01N13/14 ; G01N33/20 ; H01J49/26 ; B22D17/00 ; C22C37/04 ; G01N33/205 ; C22C33/04 ; C21C1/10 ; C21D5/00
Abstract:
Heat resistant spheroidal graphite cast iron having an improved high temperature tensile strength includes carbon (C) in a range of 3.2-3.4 wt %, silicon (Si) in a range of 4.3-4.8 wt %, manganese (Mn) in a range of 0.2-0.3 wt %, molybdenum (Mo) in a range of 0.8-1.0 wt %, vanadium (V) in a range of 0.4-0.6 wt %, chrome (Cr) in a range of 0.2-0.4 wt %, niobium (Nb) in a range of 0.2-0.4 wt %, inevitable impurities, and a remainder of iron (Fe) based on a total weight of the heat resistant spheroidal graphite cast iron. The heat resistant spheroidal graphite cast iron further includes barium (Ba) in a range of 0.0045-0.0075 wt %. A content ratio of chrome (Cr) and barium (Ba) (Cr/Ba) is in a range from about 26 to about 89.
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