EP 2952608 A1 20151209 - Fe-Mn-Al-C alloy and method for manufacturing the same
Title (en)
Fe-Mn-Al-C alloy and method for manufacturing the same
Title (de)
Fe-Mn-Al-C-Legierung und Verfahren zu ihrer Herstellung
Title (fr)
Alliage Fe-Mn-Al-C et son procédé de fabrication
Publication
Application
Priority
EP 14170843 A 20140602
Abstract (en)
An Fe-Mn-Al-C alloy and a method for manufacturing the same are revealed. The Fe-Mn-Al-C alloy whose composition is 23ˆ¼34wt.% Mn, 8ˆ¼9.5wt.% Al, and 1.4ˆ¼1.8wt.% or 1.45ˆ¼1.8 wt.% C, with the balance being iron (Fe) is formed by melting of the above components. Then the alloy is solution heat-treated at 980°Cˆ¼1200°C and then quenched so that microstructure of the alloy is a full austenite phase. And dense nanoscale (Fe,Mn) 3 AlC x carbides (º'- carbides) are formed within austenite matrix by spinodal decomposition during the quenching process. Thereby strength and ductility of the alloy are significantly improved. Moreover, after nitriding treatment, a nitride layer having predominantly aluminum nitride (AlN) with face-center-cubic (FCC) structure and a relatively small amount of iron nitride (Fe 4 N) with FCC structure is formed on surface of the alloy. Thereby surface hardness and corrosion resistance are improved. Thus use efficiency and application efficiency of the alloy are further increased.
IPC 8 full level
C21D 1/18 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/58 (2006.01); C23C 8/02 (2006.01); C23C 8/26 (2006.01); C23C 8/38 (2006.01)
CPC (source: EP)
C21D 6/005 (2013.01); C21D 6/02 (2013.01); C22C 33/04 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C23C 8/02 (2013.01); C23C 8/26 (2013.01); C23C 8/38 (2013.01); C21D 2211/004 (2013.01)
Citation (applicant)
- US 2013081740 A1 20130404 - LIU TZENG-FENG [TW]
- TW 201313923 A 20130401 - UNIV NAT CHIAO TUNG [TW]
- "Relationship between Microstructures and Tensile Properties of an Fe-30Mn-8.5A1--2.0C Alloy", MATERIALS TRANSACTIONS, vol. 51, no. 6, 28 April 2010 (2010-04-28), pages 1084 - 1088
- "Phase transitions in an Fe-9Al-30Mn-2.0C alloy", SCRIPTA MATERIALIA, vol. 57, 2007, pages 809 - 812
- "Microstructure control and ductility improvement of the two-phase y-Fe/K-(Fe, Mn) AlC alloys in the Fe-Mn-Al-C quaternary system", INTERMETALLICS, vol. 12, 2004, pages 607 - 617
- "Fundamentals of Physical Metallurgy", WILEY INTERNATIONAL EDITIONS, pages: 390 - 397
- TAKAO KOZAKAI ET AL., SPINODAL DECOMPOSITION IN FE-MO-CO AND FE-MO-V TERNARY SYSTEM, pages 159 - 164
- "STRUCTURE AND PROPERTIES OF SPINODALLY DECOMPOSED Cu-Ni-Fe ALLOYS", ROYAL SOCIETY PUBLISHING, pages: 347 - 349
- AN X-RAY STUDY OF THE DISSOCIATION OF AN ALLOY OF COPPER, IRON AND NICKEL, pages 368 - 378
- "Phase Transformations", AMERICAN SOCIETY FOR METALS, pages: 497
- PHASE TRANSFORMATIONS IN METALS AND ALLOYS, pages 308 - 311
Citation (search report)
[XD] US 2013081740 A1 20130404 - LIU TZENG-FENG [TW]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 14170843 A 20140602