5Nam W J, Choi H C. High Strength Steel Wire Rod for Suspension Coil Spring. Wire J. Inter. , 1996, (5):94-97.
6S.T. Furr, Laboratory Studies of Low-Chromium and Chromium-free Steels for Suspension Coil Springs.Society of Automotive Engineers, Inc. 800479 (1980) : 1851-1861.
7Akio Yoneguchi, Jefferey Schaad, Yutaka Kurebayashi ,et al.. Development of High Strength Spring Steel and Its Application to Automotive Coil Spring. 2000 Society of Automotive Entrineers. Inc. :101-107.
8Kawakami H,Yamada Y,Ashida S,et al.. Effect of Chemical Composition on Sag Resistance of Suspension Spring. Paper 820128 Presented at SAE Congress and Exposition,Detroit ,Feb. , 1982.
9Assefpour-Dezfuly M,Brownrigg A. Parameters Affecting Sag Resistance in Spring Steels. Metall. Trans. A 1989,20A(10): 1951.
10Furr S T. Laboratory Studies of Low Chromium and Chromium-free Steels for Suspension Coil Springs. Paper 800479 Presented at SAE Congress and Exposition,Detroit,Feb. 1980.
