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High-Performance, High-Aluminum Zinc Alloys for Low-Speed Bearings and Bushings
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Abstract
The purpose of this paper is to describe the advantages and validity of substituting the high-performance zinc casting alloys, ZA-12 and ZA-27, for bronze in selected low-speed, medium temperature bearing and bushing applications.
Because the cost per unit volume of ZA-12 and ZA-27 is less than half that of SAB 660 bronze, these zinc alloys will provide major cost savings in the OEM and replacement markets whenever they equal or exceed bronze performance on the selected applications.
For the foundry, these alloys offer significant advantages over bronze: lower energy requirements, no dependency on tin (a strategic material), and no pollution problems common to the leaded bearing bronzes.
With a natural lubricity and hardnesses exceeding those of 660 bronze, the the properties of ZA-12 and ZA-27 alloys indicate good bearing potential. This has been confirmed by laboratory tests conducted by the Battelle Institute under the auspices of ILZRO and in field tests conducted by Kidd Creek Mines, Ltd. (formerly Texasgulf Metals Company).
History, property data, laboratory data, and field experience will be presented, along with guidelines for applying the zinc alloys to bearing applications.
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Citation
Calayag, T. and Ferres, D., "High-Performance, High-Aluminum Zinc Alloys for Low-Speed Bearings and Bushings," SAE Technical Paper 820643, 1982, https://doi.org/10.4271/820643.Also In
References
- Apelian, D. Paliwal, M. Herrschaft, D.C. “Casting with Zinc Alloys” Journal of Metals November 1981
- Voest-Alpine, “Alzen 305, Alzen 501, White Bronze.” 1976
- Gervais, E. Levert, H. Bess, M. “Development of a Family of Zinc Base Foundry Alloys” Paper presented at the 84th Casting Congress and Exposition and published in the Transactions of the American Foundrymen’s Society, St. Louis, Missouri April 1980
- Gervais, E. Kandeil, A. Y. Levert, H. “Properties and Die Casting of the (ZA-27) Alloy” Paper presented at the Eleventh SDCE International Die Casting Congress, CLeveland, Ohio June 1981
- Trademark of Eastern Alloys Maybrook, N. Y.
- Glaeser W.A. Dufrane, K.F. “The Design of Boundary Lubricated Cast Bronze Bearings” Cast Bronze Bearing Institute, Inc. August 1978
- Battelle, “Wear and Friction Evaluations of ILZRO 12 and IOSSo-Treated Materials” Batelle Columbus Laboratories June 21 1977
- Kissel J. W. Dufrane, K. F. “The Bearing Properties of Zinc Gravity Casting Alloys” Batelle Columbus Laboratories December 1980
- Mines, Kidd Creek “Foundry Practice, ZA-12” Kidd Creek Mines Ltd. 1982