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US 4,066,430 AGranted
Method of tempering in a fluidized quenching medium
AssigneePPG Industries, Inc.
InventorHelmut Franz
Life of this patent
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Abstract
Heated articles may be rapidly and uniformly quenched in a fluidized bed of a dispersion of water and hydrophobic colloidal silica.
Claims21
A method of quenching a heated article comprising contacting the article with a fluidized dispersion of water in hydrophobic colloidal silica having a temperature lower than that of said heated article and maintaining said contact for a sufficient period of time to reduce the temperature difference between said heated article and said fluidized dispersion.
Dependencies are inferred from the claim text.