Title:
METHOD FOR PRODUCING HIGH-STRENGTH COMPONENTS FROM CAST STEEL HAVING TRIP/TWIP PROPERTIES AND USE OF THE MANUFACTURED COMPONENTS
Document Type and Number:
WIPO Patent Application WO/2013/064698
Kind Code:
A3
Abstract:
The invention relates to a method for producing high-strength components from austenitic or austenitic-martensitic cast steel having TRIP/TWIP properties and having an equivalent value for the stacking fault energy of the austenite of W < 35 mJ/m2 according to the relationship, wherein initially semi-finished goods or molded parts made of cast steel are melted using traditional melting methods and cast without tight dimensional tolerance, wherein the semi-finished goods or molded parts are then cold-worked with a degree of working of 20% to nearly 100% for austenitic steels and of more than 20% to 60% for austenitic-martensitic steels, wherein the cold-worked semi-finished goods or molded parts are cooled during the cold working, and thus the heating-up of the cold-worked semi-finished goods or molded parts stops above 80 °C. The invention further relates to the components thus produced as construction elements, wear elements, or crash elements.
Inventors:
WEISS ANDREAS (DE)
Application Number:
PCT/EP2012/071862
Publication Date:
May 01, 2014
Filing Date:
November 05, 2012
Export Citation:
Assignee:
TECH UNIVERSITÄT BERGAKADEMIE FREIBERG (DE)
International Classes:
C21D6/00; C21D7/02; C22C38/04; C22C38/38; C22C38/40; C22C38/58
Foreign References:
| DE102009013631B3 | 2010-08-19 | |||
| DE102004054444B3 | 2006-01-19 |
Other References:
L. KRÜGER ET AL: "Werkstoffverhalten einer TRIP/TWIP-fähigen CrMnNi-Stahlgusslegierung bis zu hohen Dehnraten", MATERIALS TESTING, vol. 52, no. 9, 1 September 2010 (2010-09-01), München, pages 588 - 595, XP002720459, ISSN: 0025-5300
TATSUYA MORIKAWA ET AL: "Deformation Microstructure and Texture in a Cold-Rolled Austenitic Steel with Low Stacking-Fault Energy", MATERIALS TRANSACTIONS, 1 January 2010 (2010-01-01), pages 620 - 624, XP055102713, Retrieved from the Internet DOI: 10.2320/matertrans.MG200901
A. JAHN ET AL: "Temperature Depending Influence of the Martensite Formation on the Mechanical Properties of High-Alloyed Cr-Mn-Ni As-Cast Steels", STEEL RESEARCH INT, vol. 82, no. 1, 1 January 2011 (2011-01-01), Weinheim DE, pages 39 - 44, XP002720460, ISSN: 1869-344X
HEINER GUTTE ET AL: "Improvement of the cold workability of austenitic CrNi steels using the trip effect", ATZ WORLDWIDE,, vol. 107, no. 1, 1 January 2005 (2005-01-01), pages 24 - 27, XP009176244, ISSN: 2192-9076
TATSUYA MORIKAWA ET AL: "Deformation Microstructure and Texture in a Cold-Rolled Austenitic Steel with Low Stacking-Fault Energy", MATERIALS TRANSACTIONS, 1 January 2010 (2010-01-01), pages 620 - 624, XP055102713, Retrieved from the Internet
A. JAHN ET AL: "Temperature Depending Influence of the Martensite Formation on the Mechanical Properties of High-Alloyed Cr-Mn-Ni As-Cast Steels", STEEL RESEARCH INT, vol. 82, no. 1, 1 January 2011 (2011-01-01), Weinheim DE, pages 39 - 44, XP002720460, ISSN: 1869-344X
HEINER GUTTE ET AL: "Improvement of the cold workability of austenitic CrNi steels using the trip effect", ATZ WORLDWIDE,, vol. 107, no. 1, 1 January 2005 (2005-01-01), pages 24 - 27, XP009176244, ISSN: 2192-9076
Attorney, Agent or Firm:
KAILUWEIT, Frank et al. (Dresden, DE)
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