Method for producing high strength steel with good ductility
The present invention provides a method for producing hot rolled steel products having high strength and ductility. The method is particularly suitable for low alloy structural steels, which contain about 0.02 to 0.15 wt % C and 0.100 to about .015 % Nb, the higher Nb percentage being used for steel...
Gespeichert in:
1. Verfasser: | |
---|---|
Format: | Patent |
Sprache: | eng ; fre ; ger |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | The present invention provides a method for producing hot rolled steel products having high strength and ductility. The method is particularly suitable for low alloy structural steels, which contain about 0.02 to 0.15 wt % C and 0.100 to about .015 % Nb, the higher Nb percentage being used for steels with the lower C content and vice versa. In the method, the steel is heated to a temperature of about 1150 to about 1250 DEG C. The steel is then rolled during a first sequence of passes so that the average austenite grain size at the end of the first sequence stays below about 50 mu m and so that the last pass in this sequence is conducted within the temperature range of about 950 to 1100 DEG C. In a second rolling sequence directly following the first sequence, the rolling is continued with further reductions that do not exceed about 15% in each pass. Subsequently, the steel may be cooled to ambient temperature in a conventional manner. |
---|