This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Wear Evaluation of Niobium-Added Cast Iron for Brake Disc and Drum Applications
Technical Paper
2020-01-1627
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Grey cast iron alloys for brake drum and brake disc applications are being developed with niobium additions and a range of equivalent carbon for commercial, passenger vehicle, and performance applications. The benefit of niobium in cast iron is based on the contribution of strength by matrix refinement for a given carbon equivalence that may permit the direct improvement of wear improvement or allow for an increase in carbon equivalence for a given strength. Proper carbon equivalency and pearlite stabilization contribute to an improved pearlite structure with an optimized distribution of graphite. These structures, when refined with niobium, demonstrate increased service life and reduced wear relative to their niobium-free equivalents as measured by lab dynamometer testing and by on-vehicle testing in passenger bus fleets. The increase in performance is attributed to both the presence of wear resistant carbides and refinement of pearlite interlamellar spacing with only minor refinement of graphite flake length.
Authors
Citation
Leal, G., Enloe, C., Meira, M., Franca, E. et al., "Wear Evaluation of Niobium-Added Cast Iron for Brake Disc and Drum Applications," SAE Technical Paper 2020-01-1627, 2020, https://doi.org/10.4271/2020-01-1627.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| [Unnamed Dataset 1] | ||
| [Unnamed Dataset 2] | ||
| [Unnamed Dataset 3] | ||
| [Unnamed Dataset 4] |
Also In
References
- Guesser, W.L. , Propriedades Mecânicas dos Ferros Fundidos First Edition (Blucher, 2009). ISBN:978-85-212-0501-2.
- Li, Q., Zhang, Y., Zhang, Y. et al. , “Influence of Sn and Nb Additions on the Microstructure and Wear Characteristics of a Gray Cast Iron,” Appl. Phys. A 126:282, 2020, https://doi.org/10.1007/s00339-020-03468-8.
- Introduction to Gray Cast Iron Processing Third Edition (American Foundry Society, 2016). ISBN:978-0-87433-407-4.
- Hecht, R., Dinwiddie, R., Porter, W., and Wang, H. , “Thermal Transport Properties of Grey Cast Irons,” SAE Technical Paper 962126, 1996, https://doi.org/10.4271/962126.
- Goodrich, G.M. , Iron Castings Engineering Handbook (American Foundry Society, 2008). ISBN:0-87433-260-5.
- BDG - Federal Association of the German Foundry Industry , “Cast Iron with Lamellar Graphite,” Feb. 2015.
- Mohrbacher, H. and Zhai, Q. , “Niobium Alloying in Grey Cast Iron for Vehicle Brake Discs,” in Materials Science and Technology, MS&T’11, Ohio, 2011, 434-445.
- Lacaze, J., and Sertucha, J. , “Effect of Cu, Mn and Sn on Pearlite Growth Kinetics in As-Cast Ductile Irons,” Int. J. Cast Met. Res. 29(1-2):73-77, 2016.
- Cueva, G., Sinatora, A., Guesser, W.L., and Tschiptschin, A.P. , “Wear Resistance of Cast Irons Used in Brake Disc Rotors,” Wear 255:1256-1260, 2003.