Global Patent Index - EP 2154263 A1

EP 2154263 A1 20100217 - Case hardening titanium and its alloys

Title (en)

Case hardening titanium and its alloys

Title (de)

Gehäusehärtendes Titanium und seine Legierungen

Title (fr)

Titane de durcissement superficiel et ses alliages

Publication

EP 2154263 A1 20100217 (EN)

Application

EP 09251856 A 20090723

Priority

GB 0813667 A 20080725

Abstract (en)

An article of titanium or a titanium-based alloy is case hardened by heat treatment at a temperate of 750°C to 850°C and at a pressure in the order of atmospheric pressure in a diffusion atmosphere. The diffusion atmosphere comprises a carrier gas such as argon which does not react chemically with the article the said temperature range and carbon monoxide. The concentration of carbon monoxide in the oxygen diffusion atmosphere is in the range of 20 volumes per million to 400 volumes per million.

IPC 8 full level

C22F 1/18 (2006.01); C23C 8/06 (2006.01); C23C 8/16 (2006.01)

CPC (source: EP US)

C21D 1/76 (2013.01 - EP US); C22F 1/183 (2013.01 - EP US); C23C 8/16 (2013.01 - EP US)

Citation (applicant)

Citation (search report)

  • [A] US 2005234561 A1 20051020 - NUTT MICHAEL [US], et al
  • [A] WO 9714820 A1 19970424 - STURM RUGER & CO [US]
  • [A] JP H059703 A 19930119 - NIPPON KOKAN KK, et al
  • [A] GB 2118978 A 19831109 - MASCHF AUGSBURG NUERNBERG AG
  • [AD] WO 2004007788 A1 20040122 - BOC GROUP PLC [GB], et al
  • [A] DATABASE WPI Section Ch Week 197636, Derwent World Patents Index; Class M, Page 13, AN 1976-67465X, XP002556841 & JP S5051039 A 19750507
  • [A] I.M. POHRELYUK ET AL: "Laws of formation of oxycarbide layers on titanium in carbon- and oxygen- containing media", MATERIALS SCIENCE, vol. 39, no. 3, 1 March 2003 (2003-03-01), pages 400 - 404, XP002556842
  • [A] JIANG YAO ET AL.: "Behavior and mechanism of TiAl based alloy surface carburization", CHINESE JOURNAL OF MATERIALS RESEARCH, vol. 19, no. 2, 1 April 2005 (2005-04-01), pages 139 - 146, XP002556843 & JIANG Y ET AL: "Behavior and mechanism of TiAl based alloy surface carburization", CAILIAO YAN JIU XUEBAO - CHINESE JOURNAL OF MATERIALS RESEARCH, GAI-KAN BIANJIBU, SHENYANG, CN, vol. 19, no. 2, 1 April 2005 (2005-04-01), pages 139 - 146, XP009126191, ISSN: 1005-3093
  • [XP] P.STRATTON ET AL: "Thermochemical surface treatment of titanium", vol. 3, no. 1-2, 1 June 2009 (2009-06-01) - 1 June 2009 (2009-06-01), XP002556849, Retrieved from the Internet <URL:http://www.ingentaconnect.com/content/maney/iht/2009/00000003/F0020001/art00007;jsessionid=y8jte3c53k8s.alexandra> [retrieved on 20091118]

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 MK MT NL NO PL PT RO SE SI SK SM TR

Designated extension state (EPC)

AL BA RS

DOCDB simple family (publication)

EP 2154263 A1 20100217; CA 2673897 A1 20100125; GB 0813667 D0 20080903; US 2010139812 A1 20100610

DOCDB simple family (application)

EP 09251856 A 20090723; CA 2673897 A 20090724; GB 0813667 A 20080725; US 50861009 A 20090724