Title:
Low-temperature processing of martensitic steel in mixed hardening
Document Type and Number:
Japanese Patent JP5996427
Kind Code:
B2
Abstract:
The temperature T1 is substantially lower than the martensitic transformation temperature Mf, and the time t during which said steel is kept in said cryogenic medium at a temperature T1 from the moment when the hottest part of the steel reaches a temperature lower than the martensitic transformation temperature Mf is at least equal to a non-zero time t1, the temperature T1 (in ° C.) and the time t1 (in hours) being linked by the equation T1=ƒ(t1), the first derivative of the function ƒ relative to t, ƒ′(t), being positive, and the second derivative of ƒ relative to t, ƒ″(t), being negative.
Inventors:
Ferrer, Loran
Application Number:
JP2012518125A
Publication Date:
September 21, 2016
Filing Date:
July 02, 2010
Export Citation:
Assignee:
SNECMA
International Classes:
C21D6/00; C21D1/18; C21D6/04; C22C38/00; C22C38/06; C22C38/54
Domestic Patent References:
| JP2008539331A | ||||
| JP2004522859A | ||||
| JP2008546912A | ||||
| JP2011528068A |
Foreign References:
| WO2009007562A1 |
Attorney, Agent or Firm:
Kawaguchi International Patent Office