Home
Contact us
User access
Site Map
September 9, 2010, 10:36 am
About Us
Where we are
Business Areas
Capabilities
Publications
News & Events
 
You are in :   Home   /   Publications   /   ECSC Final Reports list  
 

Thursday 8 November 2007
CONTROL OF SHEET SURFACE DEFECTS AND DEEP DRAWING PROPERTIES IN FINAL STRIP PRODUCTION STEPS
 J.H. Bianchi - P.Vescovo - F.Dionisi - A.Fouratier - A.Lucas - P.D.Pütz ECSC Final Report 7210-PR/338 EUR 22566 EN
CSM research within this Project has been focused in understanding conditions leading to Lüders bands in ferritic stainless steels strips during their processing.The research has been carried along five interlinked ways: standard tensile testing to characterise the strip mechanical properties, physical simulation of skin pass elongation by tension, pilot mill rolling, industrial rolling and numerical simulation of both the strip processing and its subsequent tensile testing.
The most important conclusion of the Project is that YPEL elimination does not appear to depend only on the accumulated strain, but also on a minimum threshold strain rate (order 0.13 s-1 for AISI430-0.6 mm strip). Its suppression can be normally achieved with smaller rolling elongations than predicted by the continuous testing at the routinely low strain rate of the characterising test (10-3). In CSM work, that threshold appears as independent of the mode of deformation, this being either skin pass with bending and tension numerical simulation or purely tension physical simulation. That conclusion suggests that skin pass is not a requisite to eliminate YPEL and this can be achieved even by purely bending provided that the strain rate is high enough (0.13 s-1). Such value is still very reachable at low reductions in industrial configurations, but not necessarily in lower speed pilot mills.

 
 
« Previous Archivie Next »
 
 

 
         
 © 2008 - Centro Sviluppo Materiali S.p.A. Via di Castel Romano, 100 - 00128 - Rome - ITALY - Ph. +39 06 50551 - Fax. +39 06 5050250
Capitale sociale 520.000 Euro i.v. - Registro Imprese di Roma CF 00477510580 R.E.A. di Roma 269973 - PI 00903541001		 Terms and Conditions