Invention Grant
US08317942B2 Ledeburite cast iron with a high carbide content and an evenly distributed graphite embodiment
有权
具有高碳化物含量和均匀分布的石墨实施例的莱氏体铸铁
- Patent Title: Ledeburite cast iron with a high carbide content and an evenly distributed graphite embodiment
- Patent Title (中): 具有高碳化物含量和均匀分布的石墨实施例的莱氏体铸铁
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Application No.: US11817752Application Date: 2006-02-08
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Publication No.: US08317942B2Publication Date: 2012-11-27
- Inventor: Laszlo Pelsoeczy , Wilfried Langner , Hans-Henning Zutz , Thomas Gerle , Franz-J. Goebbeis
- Applicant: Laszlo Pelsoeczy , Wilfried Langner , Hans-Henning Zutz , Thomas Gerle , Franz-J. Goebbeis
- Applicant Address: DE Friedberg
- Assignee: Federal-Mogul Friedberg GmbH
- Current Assignee: Federal-Mogul Friedberg GmbH
- Current Assignee Address: DE Friedberg
- Agency: Dickinson Wright, PLLC
- Agent Robert L. Stearn
- Priority: DE102005010090 20050304
- International Application: PCT/EP2006/001103 WO 20060208
- International Announcement: WO2006/094591 WO 20060914
- Main IPC: C22C37/06
- IPC: C22C37/06 ; C21D5/00

Abstract:
A cast iron material, particularly a ledeburitic cast iron material with a carbide content of at least 15 wt. % and a characteristic free, evenly distributed graphite formation is disclosed. In this case, the evenly distributed graphite formation may comprise graphite flakes and/or vermicular graphite and/or nodular graphite. Depending on the respective application (diameter (D) of the running gear seal, peripheral speed), the basic matrix may be realized in pearlitic and/or bainitic and/or martensitic form. Due to the high graphite content, the material has a thermal conductivity that is three to four times greater than that of white cast iron materials, wherein this provides the advantage that no scoring of the running gear seals occurs at high peripheral speeds (>5 m/s) and large diametrical dimensions of the seals (D >600 mm). In addition, the high carbide content of at least 15 wt. % provides an adequate wear resistance, and other alloying elements such as chromium, vanadium, molybdenum and nickel provide the material with a corresponding corrosion resistance. The aforementioned ledeburitic cast iron material with evenly distributed graphite formation can be used, for example, for the manufacture of axial face seals and cylinder liners.
Public/Granted literature
- US20110094632A1 LEDEBURITE CAST IRON WITH A HIGH CARBIDE CONTENT AND AN EVENLY DISTRIBUTED GRAPHITE EMBODIMENT Public/Granted day:2011-04-28
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