EP 0253176 A3 19890816 - METHOD FOR HEAT TREATING STEEL WORK PIECES
Title (en)
METHOD FOR HEAT TREATING STEEL WORK PIECES
Publication
Application
Priority
DE 3623105 A 19860709
Abstract (en)
[origin: EP0253176A2] For heat treating iron and steel work pieces, the latter are heated up in a vacuum and cooled by blasting with inert gas under pressure. Martensite is formed evenly over the entire charge if, after rapid cooling to martensite-forming temperature, temperature equalisation between charge surface and charge interior is brought about by slowing down the gas-circulating velocity. For this purpose, the temperature of the charge surface is measured and the temperature course in the charge interior simulated by means of a computer program into which the charge-specific parameters have been previously fed.
IPC 1-7
IPC 8 full level
C21D 1/613 (2006.01); C21D 1/22 (2006.01); C21D 1/767 (2006.01); C21D 11/00 (2006.01); F27B 5/16 (2006.01)
CPC (source: EP)
C21D 1/22 (2013.01); C21D 1/767 (2013.01); C21D 11/00 (2013.01); F27B 5/16 (2013.01); F27B 2005/161 (2013.01)
Citation (search report)
- [A] EP 0129701 A1 19850102 - SCHMETZ INDUSTRIEOFENBAU UND V [DE]
- [AD] FACHBERICHTE HÜTTENPRAXIS METALLWEITERVERARBEITUNG, Band 23, Nr. 9, 1985, Seiten 717-721, Sprechsaal-Verlag, Coburg, DE; P. LISTEMANN: "Neuere Entwicklungen auf dem Gebiet der Vakuum-Wärmebehandlung"
- [A] PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 71 (C-217)[1508], 3. April 1984; & JP-A-58 224 121 (SUMITOMO KINZOKU KOGYO K.K.) 26-12-1983
- [A] PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 225 (C-247)[1662], 16. Oktober 1984; & JP-A-59 110 735 (KAWASAKI SEITETSU K.K.) 26-06-1984
Designated contracting state (EPC)
AT BE DE FR GB
DOCDB simple family (publication)
DE 3623105 C1 19871203; EP 0253176 A2 19880120; EP 0253176 A3 19890816; JP S6326308 A 19880203
DOCDB simple family (application)
DE 3623105 A 19860709; EP 87109238 A 19870626; JP 16797787 A 19870707