This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of a New Light-Weight Suspension Coil Spring
Annotation ability available
Sector:
Language:
English
Abstract
This newly developed helical spring can be used at a stress level up to 1300 MPa. The material is composed of Fe-C-Si-Mn-Ni-Cr-Mo-V alloy. Its strength-toughness balance was greatly superior to that of other spring steels.
To improve the fatigue strength at a higher stress level, decarburization at the surface upon austenitizing was severely controlled, applying induction heating. Then, a special shot peening process, introduced for the first time, was applied to obtain a surface residual stress at the surface of over 1000 MPa. The spring was first applied to a 1992 TOYOTA model car. Plans are to increase the use since the spring material achieves a weight reduction of at least 30 % and, possibly, 35 to 40 %.
Recommended Content
| Technical Paper | Development of High-Strength Suspension Coil Springs in Which Corrosion Fatigue Strength is Important |
| Technical Paper | High Sag Resistance Spring Wire for Automotive Suspension |
Authors
Citation
Sakakibara, T., Kusakari, W., Nakano, O., Yasuda, S. et al., "Development of a New Light-Weight Suspension Coil Spring," SAE Technical Paper 930263, 1993, https://doi.org/10.4271/930263.Also In
References
- Ozone T. et al. “Precipitation Strengthened Spring Steel for Automotive Suspension” SAE Paper 820129
- Yoshikawa F. et al. “New Aspects in Spring Steels for Automotive Suspension and their Heat Treatment” Journal of the Japan Society for Heat Treatment 21 1981 236
- Allten A.G. Payson P. The Effect of Silicon on the Tempering of Martensite” Trans.ASM 45 1953 498
- Nishimura T. et al. “The Valve Spring Carbo-Nitrided at a High Temperature for High Speed Engines” SAE Paper 890777
- Irvine K.J. Pickering F.B. Garstone J. JISI 196 1960 66
- Tata H.J. Kary E.R. “Steels for Automotive Coil Springs with Improved Resistance to Relaxation” SAE Paper 800480 Detroit February 1980
- Gordine J. Codd I. “The Influence of Silicon up to 1.5 wt% on the Tempering Characteristics of a Spring Stell” J.I.S.I. 207 1969 461
- Smith E. “An Investigation of Secondary Hardening of a 1 % Vanadium-0.2 % Carbon Steel” Acta Met. 14 1966 583