Bearing systems

Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal

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Details

148403, 148421, 148906, 384912, C22C 4510

Patent

active

055890121

ABSTRACT:
Bearings are made having at least one surface made of an amorphous alloy having a coefficient of friction of less than 0.5 and having a tensile strength of 1.0 GPa or greater. In the case of a bearing shaft, the shaft can be smaller than a comparable steel shaft. Articles can be fabricated by heating the amorphous metal to a temperature above its plastic flow temperature and below its crystallization temperature so that it is flowable. The heated material is molded or formed into a desired shape and then the molded article is cooled to its metastable, amorphous state. A preferred configuration for the bearing shaft is in a parabola of revolution form so it acts as a thrust bearing.

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Peker, A. et al., "A Highly Processible Metallic Glass . . . ", Applied Physics Letters, V. 63, No. 17, 25 Oct. 1993.
"New Amorphous Alloys Offer High Strength, Low Density", Advanced Materials and Processes, Sep. 1994.
Kinder, J., "Materials for Rolling Element Bearings," paper from Seminar of Institution of Mechanical Engineers, 16 Nov. 1990.
Wilson, W. H., "Why so Many Bearing Materials?", paper presented at 7th Cheltenham Bearing Conference, 29 Oct. 1986.
ASM Handbook, vol. 2, pp. 804-821, "Metallic Glasses", ASM, 1990.
Thakoor, A. P., et al., "Refractory Amorphous Metallic . . . Coatings on Steeel Substrates", J. of Applied Physics, v. 58, No. 9, 1 Nov. 1985.

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