590 N/mm2 grade high-strength hot-rolled steel sheet has been applied to an automotive suspension system, and 780 N/mm2 grade has recently been applied on trial to the same parts. Both of the steels used for the suspension system are required to have good formability, especially high stretch-flangeability. This paper describes the effect of the microstructure of the steel on stretch-flangeability. The results of mill trials have shown that the bainitic-ferrite mono-phase microstructure has the best mechanical properties.
780 N/mm2 grade hot-rolled high-strength steel sheet for automotive suspension system
Hochfeste Stahlbleche für Fahrwerkskomponenten
JSAE Review ; 24 , 1 ; 81-86
2003
6 Seiten, 10 Bilder, 3 Tabellen, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
780 N-mm2 grade hot-rolled high-strength steel sheet for automotive suspension system
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