Steel automotive suspension springs are subject to occasional service and proving ground fractures. This has resulted in increased competition from alternative suspension systems and materials, and a weakening of the North American market for steel shape products for use in coil and lead springs. The reasons for these fractures are not clearly understood. The mechanism(s) responsible for spring failure were investiagated by evaluating coil and leaf springs that had failed during proving ground tests or actual service. Metallographic and fractographic analysis has revealed the primary spring failure mechanism to be corrosion related. Corrosion masked any effect due to mill processing, and therefore must be eliminated before other factors will play a major role in determining spring performance. Preliminary evidence indicates that protective coatings can effectively reduce the incidence of spring failure.
Service and proving ground failure analysis of automotive suspension springs from hot rolled steel bars
Analyse der Ausfaelle im Betrieb und im Prueffeld von Fahrzeugfedern aus warmgewalzten Stabstahl
1989
7 Seiten, 14 Bilder, 2 Tabellen, 13 Quellen
Conference paper
English
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