EP 0185341 B2 19990210 - Method of increasing the strength of reinforcing steels
Title (en)
Method of increasing the strength of reinforcing steels
Title (de)
Verfahren zur Erhöhung der Festigkeit von Bewehrungsstählen
Title (fr)
Procédé pour augmenter la résistance des aciers à béton
Publication
Application
Priority
DD 27087884 A 19841217
Abstract (en)
[origin: EP0185341A2] The invention aims to reduce the use of alloys for the manufacture of reinforcing steels of higher strength, in particular of ribbed reinforcing steels which are produced as rolled wire in the form of ringed bundles on continuous high-output wire mills. A process for increasing the strength, in particular the yield strength, of reinforcing steels is to be developed while simultaneously ensuring good weldability and good plastic properties. According to the invention, the rolled wire is deformed in the end phase of the hot-rolling process within a preset time by a defined change in shape (reduction in cross-section) and, immediately after the deformation, very rapidly quenched to a temperature below the austenite recrystallisation temperature, but above the Ar1 transformation temperature, so that there is a very fine or incompletely recrystallised austenite structure at the start of the gamma - alpha -transformation.
IPC 1-7
IPC 8 full level
C21D 8/08 (2006.01)
CPC (source: EP)
C21D 8/08 (2013.01)
Designated contracting state (EPC)
AT BE DE FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0185341 A2 19860625; EP 0185341 A3 19881005; EP 0185341 B1 19910925; EP 0185341 B2 19990210; AT E67793 T1 19911015; DD 231577 A1 19860102; DD 231577 B1 19870909; DE 3584235 D1 19911031
DOCDB simple family (application)
EP 85116005 A 19851216; AT 85116005 T 19851216; DD 27087884 A 19841217; DE 3584235 T 19851216