Global Patent Index - EP 1029094 A1

EP 1029094 A1 2000-08-23 - METHOD FOR DISSOLUTION OF NITROGEN-RICH INCLUSIONS IN TITANIUM AND TITANIUM ALLOYS

Title (en)

METHOD FOR DISSOLUTION OF NITROGEN-RICH INCLUSIONS IN TITANIUM AND TITANIUM ALLOYS

Title (de)

VERFAHREN ZUR AUFLÖSUNG VON STICKSTOFFREICHEN EINSCHLÜSSEN IN TITAN UND TITANLEGIERUNGEN

Title (fr)

PROCEDE DE DISSOLUTION D'INCLUSIONS RICHES EN AZOTE DANS DU TITANE ET DES ALLIAGES DE TITANE

Publication

EP 1029094 A1 (EN)

Application

EP 97947257 A

Priority

US 9716812 W

Abstract (en)

[origin: WO9920804A1] It has been discovered that electroslag remelting of titanium metal or alloys under controlled partial pressures of nitrogen, and somewhat oxygen, can dissolve nitrogen-rich inclusions to help eliminate or reduce initiation sites for cracks. The process for the electroslag remelting of titanium and titanium alloys ensures that nitrogen-rich inclusions are dissolved or at least minimized during the melting process.

IPC 1-7 (main, further and additional classification)

C22B 9/18

IPC 8 full level (invention and additional information)

C22B 34/12 (2006.01); C22B 9/10 (2006.01); C22B 9/18 (2006.01)

CPC (invention and additional information)

C22B 9/18 (2013.01)

Citation (search report)

See references of WO 9920804A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9920804 A1 19990429; CA 2306672 A1 19990429; EA 200000444 A1 20001030; EP 1029094 A1 20000823; JP 2001520318 A 20011030

INPADOC legal status


2002-09-18 [18R] REFUSED

- Effective date: 20020428

2000-10-25 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20000912

2000-08-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000522

2000-08-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE