Invention Grant
- Patent Title: Heat-resistant, austenitic cast steel and exhaust member made thereof
- Patent Title (中): 耐热奥氏体铸钢及其制成的排气构件
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Application No.: US12918782Application Date: 2009-02-23
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Publication No.: US08388889B2Publication Date: 2013-03-05
- Inventor: Masahide Kawabata
- Applicant: Masahide Kawabata
- Applicant Address: JP Tokyo
- Assignee: Hitachi Metals Ltd.
- Current Assignee: Hitachi Metals Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2008-040796 20080222
- International Application: PCT/JP2009/053195 WO 20090223
- International Announcement: WO2009/104792 WO 20090827
- Main IPC: C22C38/44
- IPC: C22C38/44 ; C22C38/48
Abstract:
Heat-resistant, austenitic cast steel comprising by mass 0.3-0.6% of C, 1.1-2% of Si, 1.5% or less of Mn, 17.5-22.5% of Cr, 8-13% of Ni, 1.5-4% as (W+2Mo) of at least one of W and Mo, 1-4% of Nb, 0.01-0.3% of N, 0.01-0.5% of S, the balance being Fe and inevitable impurities, and meeting the following formulae (1), (2), (3) and (4): 0.05≦(C—Nb/8)≦0.6 (1), 17.5≦17.5Si−(W+2Mo) (2), 5.6Si+(W+2Mo)≦13.7 (3), and 0.08Si+(C—Nb/8)+0.015Cr+0.011Ni+0.03W+0.02Mo
Public/Granted literature
- US20110000200A1 HEAT-RESISTANT, AUSTENITIC CAST STEEL AND EXHAUST MEMBER MADE THEREOF Public/Granted day:2011-01-06
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