EP 1574587 A1 20050914 - METHOD OF THERMO-MECHANICAL-TREATMENT FOR Fe-Mn-Si SHAPE-MEMORY ALLOY DOPED WITH NbC
Title (en)
METHOD OF THERMO-MECHANICAL-TREATMENT FOR Fe-Mn-Si SHAPE-MEMORY ALLOY DOPED WITH NbC
Title (de)
VERFAHREN ZUR THERMOMECHANISCHEN BEHANDLUNG FÜR EINE MIT NbC DOTIERTE Fe-Mn-Si-FORMGEDÄCHTNISLEGIERUNG
Title (fr)
PROCEDE DE TRAITEMENT THERMO-MECANIQUE POUR ALLIAGE FE-MN-SI A MEMOIRE DE FORME DOPE AU NBC
Publication
Application
Priority
- JP 0316189 W 20031217
- JP 2002367062 A 20021218
Abstract (en)
The present invention provides a thermomechanical treatment means for a Fe-Mn-Si-based shape memory alloy having specified components with Nb, C addition with simple deformation prior to aging. Such deformation treatment prior to aging is carried out in the inventions of the prior applications in a temperature range of from 500 DEG C to 800 DEG C. According to the present invention, however, the deformation treatment prior to the aging treatment can be successfully carried out not at high temperature but at room temperature, if the deformation ratio is in a specified range. <??>The technical meaning of the present invention must be clearly understood as compared to the prior art and the inventions of the prior applications because the present invention allows the treatment at room temperature while the others require troublesome treatment at high temperature so that there is significant difference therebetween. That is, according to the present invention, the remarkable improvement in shape memory property is achieved first time by a combination of specified alloy components, specified deformation ratio at room temperature, and setting of aging condition to a certain range. With the development of the present invention, it is expected that the use of shape memory alloys will be accelerated toward the practical use in a wide variety of fields. <IMAGE>
IPC 1-7
IPC 8 full level
C21D 8/00 (2006.01); C22C 22/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C22C 38/38 (2006.01); C22F 1/00 (2006.01)
CPC (source: EP US)
C21D 8/005 (2013.01 - EP US); C22C 22/00 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22F 1/006 (2013.01 - EP US); C21D 2201/01 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1574587 A1 20050914; EP 1574587 A4 20060201; EP 1574587 B1 20080716; CN 100342039 C 20071010; CN 1692163 A 20051102; DE 60322260 D1 20080828; JP 2004197161 A 20040715; JP 3950963 B2 20070801; KR 20050083601 A 20050826; US 2005236077 A1 20051027; WO 2004055222 A1 20040701
DOCDB simple family (application)
EP 03780855 A 20031217; CN 200380100566 A 20031217; DE 60322260 T 20031217; JP 0316189 W 20031217; JP 2002367062 A 20021218; KR 20057001247 A 20050124; US 51925504 A 20041227