It is now accepted by all automotive and truck OEMS and suppliers that AHSS (Advanced High Strength Steels) are one of the main answer to the stricter and stricter requirements of safety and environment (lightening). The potential of AHSS can be resourcefully exploited only through a strong effort from the designers and the manufacturers towards analysing all aspects regarding their use in production from both product and process points of view. Since the middle nineties AHSS are being used for wheel production, and MAGNETTO WHEELS, as both designer and manufacturer of wheels, has earned a good experience about their potential and the limits of their application to its products. This paper is focuses on underlining the great benefits of AHSS wheel, in terms of weight reduction, increased performance under load and new possibilities to satisfy style requirements, and analysing the major critical aspects linked to industrialisation. The approach used by MAGNETTO WHEELS, as both designer and manufacturer of wheels are: 1) exploring new discs materials and jointly designing the most suitable processes; 2) investigating and applying new technologies, like flow-forming of rims; 3) developing new wheel structures to fulfil requirements of fatigue, stiffness and style as well. MAGNETTO WHEELS started R&D projects to explore boron, manganese and stainless steels. The recent experience with stainless steels proved that discs produced with not modified dies, with this material and reduced thickness, have no serious forming criticalities and can accomplish all product specifications. The demonstrated lightening potential of AISI 304L stainless steel is at least 2%, with respect to DP600. By flow-forming, high strength high precision thin walled tubes with good surface finish and close tolerances can be manufactured with relative ease and reasonable costs. MAGNETTO WHEELS is investigating open issues regarding process reliability for manufacturing AHSS rims and fatigue resistance of flow-forming rollers, through the participation in two European research projects.
Potential applications of new HSS grades for wheels
Potenzielle Anwendungen neuer hochfester Mehrphasenstähle für Räder
2005
11 Seiten, 13 Bilder, 2 Tabellen
Aufsatz (Konferenz)
Datenträger
Englisch
hochfester niedrig legierter Stahl , Fahrzeugrad , mikrolegierter Stahl , Steifigkeit , Materialermüdung , mechanische Eigenschaft , Anwendung im Fahrzeugbau , Borzusatz , TRIP-Stahl , Dualphasenstahl , Mehrphasenstahl , Speichenrad , Finite-Elemente-Methode , Modellsimulation , mathematisches Modell , Siliciumstahl , Chrom-Nickel-Stahl
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