Invention Grant
- Patent Title: Hard alloys with dry composition
- Patent Title (中): 具有干组分的硬质合金
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Application No.: US12310440Application Date: 2007-07-18
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Publication No.: US08168009B2Publication Date: 2012-05-01
- Inventor: Rafael Agnelli Mesquita , Celso Antonio Barbosa
- Applicant: Rafael Agnelli Mesquita , Celso Antonio Barbosa
- Agency: Nixon Peabody LLP
- Agent Jeffrey L. Costellia
- Priority: BR0603856 20060828
- International Application: PCT/BR2007/000187 WO 20070718
- International Announcement: WO2008/025105 WO 20080306
- Main IPC: C22C38/22
- IPC: C22C38/22 ; C22C38/24 ; C22C38/26 ; C22C38/34 ; C22C38/36

Abstract:
“HARD ALLOYS WITH DRY COMPOSITION”, presenting a composition of alloy elements consisting, in mass percentage, of Carbon between 0.5 and 2.0; Chrome between 1.0 and 10.0; Tungsten-equivalent, as given by ratio 2Mo+W, between 7.0 and 14.0; Niobium between 0.5 and 3.5. Niobium can be partially or fully replaced with Vanadium, at a ratio of 2% Niobium to each 1% Vanadium; Vanadium between 0.5 and 3.5. Vanadium can be partially or fully replaced with Niobium, at a ratio of 2% Niobium to each 1% Vanadium; Cobalt lower than 8, the remaining substantially Iron and impurities inevitable to the preparation process. As an option to refine carbides, the steel of the present invention can have content of Nitrogen controlled, below 0.030 and addition of Cerium or other earth elements at content between 0.005 and 0.020. For the same purpose, Silicon and Aluminum can be optionally added, at content between 0.5 and 3.0% for both of them.
Public/Granted literature
- US20090196786A1 HARD ALLOYS WITH DRY COMPOSITION Public/Granted day:2009-08-06
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