(19)

(11)

EP 2 113 034 A1

(12)

(43) Date of publication: 04.11.2009 Bulletin 2009/45 (21) Application number: 08730220.4 (22) Date of filing: 20.02.2008

(51) International Patent Classification (IPC):  C22C 9/00(2006.01) B22F 7/00(2006.01) C22C 1/10(2006.01) C04B 37/02(2006.01) (86) International application number: PCT/US2008/054373 (87) International publication number: WO 2008/103704 (28.08.2008 Gazette 2008/35)

(84) Designated Contracting States: 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 (30) Priority: 22.02.2007 US 709515 (71) Applicant: Kennametal Inc. Latrobe, PA 15650-0231 (US)	(72) Inventors: DENG, Xin Rogers, Arkansas 72758 (US) KELLEY, Harold, E. Rogers, Arkansas 72756 (US) (74) Representative: Sulzbach, Werner  Prinz & Partner Rundfunkplatz 2 80335 München 80335 München (DE)