EP 2171113 A1 20100407 - HIGH STRENGTH, HIGH TOUGHNESS ROTATING SHAFT MATERIAL
Title (en)
HIGH STRENGTH, HIGH TOUGHNESS ROTATING SHAFT MATERIAL
Title (de)
HOCHFESTES, HOCHZÄHES DREHSCHAFTMATERIAL
Title (fr)
MATÉRIAU D'ARBRE ROTATIF À TÉNACITÉ ÉLEVÉE, À RÉSISTANCE ÉLEVÉE
Publication
Application
Priority
- US 2008068372 W 20080626
- US 94624407 P 20070626
Abstract (en)
[origin: US2009004041A1] An age hardenable, martensitic steel alloy that provides high strength, high toughness, and good low cycle fatigue life and a method of making same are disclosed. The alloy comprises a matrix having a weight percent composition consisting essentially of about <tables id="TABLE-US-00001" num="00001"> <table frame="none" colsep="0" rowsep="0"> <tgroup align="left" colsep="0" rowsep="0" cols="3"> <colspec colname="offset" colwidth="42pt" align="left"/> <colspec colname="1" colwidth="84pt" align="left"/> <colspec colname="2" colwidth="91pt" align="left"/> <thead> <row> <entry/> <entry namest="offset" nameend="2" align="center" rowsep="1"/> </row> </thead> <tbody valign="top"> <row> <entry/> <entry>Carbon</entry> <entry> 0.2-0.36</entry> </row> <row> <entry/> <entry>Manganese</entry> <entry>0.20 max.</entry> </row> <row> <entry/> <entry>Silicon</entry> <entry>0.10 max.</entry> </row> <row> <entry/> <entry>Phosphorus</entry> <entry>0.01 max.</entry> </row> <row> <entry/> <entry>Sulfur</entry> <entry>0.004 max.</entry> </row> <row> <entry/> <entry>Chromium</entry> <entry> 1.3-4</entry> </row> <row> <entry/> <entry>Nickel</entry> <entry> 10-15</entry> </row> <row> <entry/> <entry>Molybdenum</entry> <entry>0.75-2.7</entry> </row> <row> <entry/> <entry>Cobalt</entry> <entry> 8-22</entry> </row> <row> <entry/> <entry>Aluminum</entry> <entry>0.01 max.</entry> </row> <row> <entry/> <entry>Titanium</entry> <entry>0.02 max.</entry> </row> <row> <entry/> <entry>Calcium</entry> <entry>0.001 max.</entry> </row> <row> <entry/> <entry namest="offset" nameend="2" align="center" rowsep="1"/> </row> </tbody> </tgroup> </table> </tables> and the balance being iron and usual impurities. The alloy further contains a plurality of inclusions dispersed in the alloy matrix. The inclusions comprise calcium compounds that are about 0.4 mum to about 7.0 mum in major dimension, they have a median size of at least about 1.6 mum in major dimension, and the inclusions contain essentially no rare earth elements.
IPC 8 full level
C22C 38/52 (2006.01); C22C 33/04 (2006.01)
CPC (source: EP US)
C22C 33/04 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/52 (2013.01 - EP US)
Citation (search report)
See references of WO 2009003112A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
US 2009004041 A1 20090101; CA 2691795 A1 20081231; CN 101802239 A 20100811; EP 2171113 A1 20100407; JP 2010531933 A 20100930; KR 20100029130 A 20100315; MX 2009014214 A 20100315; TW 200925296 A 20090616; WO 2009003112 A1 20081231
DOCDB simple family (application)
US 14705508 A 20080626; CA 2691795 A 20080626; CN 200880105114 A 20080626; EP 08772048 A 20080626; JP 2010515122 A 20080626; KR 20107001716 A 20080626; MX 2009014214 A 20080626; TW 97124031 A 20080626; US 2008068372 W 20080626