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1. (WO2004007788) METHOD OF CASE HARDENING TITANIUM AND ZIRCONIUM ALLOYS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2004/007788    International Application No.:    PCT/GB2003/003077
Publication Date: 22.01.2004 International Filing Date: 14.07.2003
Chapter 2 Demand Filed:    09.02.2004    
IPC:
C23C 8/12 (2006.01)
Applicants: THE BOC GROUP PLC [GB/GB]; Chertsey Road, Windlesham, Surrey GU20 6HJ (GB) (For All Designated States Except US).
STRATTON, Paul, Francis [GB/GB]; (GB) (For US Only).
BOODEY, John, B. [US/US]; (US) (For US Only)
Inventors: STRATTON, Paul, Francis; (GB).
BOODEY, John, B.; (US)
Agent: WICKHAM, Michael; The Boc Group Plc, Chertsey Road, Windlesham, Surrey GU20 6HJ (GB)
Priority Data:
0216527.2 16.07.2002 GB
Title (EN) METHOD OF CASE HARDENING TITANIUM AND ZIRCONIUM ALLOYS
(FR) PROCEDE DE CEMENTATION D'ALLIAGES DE TITANE ET DE ZIRCONIUM
Abstract: front page image
(EN)An article of titanium or a titanium-based alloy, or of zirconium or a zirconium-based alloy is case hardened by heat treatment for at least 12 hours at one or more temperatures in the range of 850 °C to 900 °C and at a pressure in the order of atmospheric pressure in an oxygen diffusion atmosphere. The oxygen diffusion atmosphere comprises a carrier gas such as argon which does not react chemically with the article the said temperature range and molecular oxygen. The concentration of oxygen as the oxygen diffusion atmosphere is in the range of 10 volumes per million to 400 volumes per million.
(FR)Un article en titane ou en alliage de titane, ou en zirconium ou en alliage de zirconium est cémenté par traitement thermique pendant au moins 12 heures, à une ou plusieurs plages de températures comprises entre 850 °C et 900 °C, et sous une pression de l'ordre de la pression atmosphérique, dans une atmosphère de diffusion d'oxygène. L'atmosphère de diffusion d'oxygène comprend un gaz porteur tel que l'argon, lequel ne réagit pas chimiquement avec l'article dans ladite plage de température, et l'oxygène moléculaire. La concentration en oxygène en atmosphère de diffusion d'oxygène se situe dans des plages comprises entre 10 volumes par million et 400 volumes par million.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, OM, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)