Cobalt based alloys with critical carbon content for making and using in glass fiber production
AssigneeOwens-Corning Fiberglas Corporation
InventorsDavid J. Gaul, Dennis L. McGarry
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Abstract
Cobalt based alloys which include chromium, nickel, tungsten, tantalum, zirconium, carbon and boron are provided which are suitable for forming spinners to be used in forming glass fibers. The alloys contain critically important amounts of carbon which maximizes the stress rupture life of the spinner alloy and minimizes the creep rate thereby making the alloy outstandingly adapted for glass manufacture.
Claims18
As a composition of matter a glass corrosion resistant, high strength, low creep alloy which is free of hafnium and yttrium and dysprosium and which consists essentially of the following elements in approximate amounts expressed in weight percent
- ______________________________________ chromium 33% to 40% nickel 5% to 15% tungsten 5% to 10% tantalum 1.5% to 4% zirconium 0.01% to 0.5% carbon 0.75% to 1.3% boron 0.005% to 0.5% cobalt Balance ______________________________________
- and optionally containing 0-0.2% by weight silicon and 0-2% by weight of iron and incidental impurities.
Dependencies are inferred from the claim text.