The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 1979
Filed:
Nov. 07, 1977
Willard Garcia, La Porte, IN (US);
Jerry A Butzer, La Porte, IN (US);
John R Mihalisin, North Caldwell, NJ (US);
Gerald W Hulit, Ridgewood, NJ (US);
Howmet Corporation, Greenwich, CT (US);
Abstract
A nickel-base casting superalloy consisting essentially (by weight of the alloy) of 7% to 25% chromium, 02.% to 7% aluminum, 0.2% to 6% titanium, 0.01% to 0.25% carbon, up to 0.2% zirconium, up to 0.15% boron, up to 3% hafnium, at least 5% of a matrix-strengthening element selected from the group consisting of 0 to 25% cobalt, 0 to 10% molybdenum, 0 to 13% tungsten to 6% tantalum, 0 to 5% columbium, and 0 to 1.5% vanadium, a carbide shape controller selected from 0.022% to 0.15% magnesium, 0.005% to 0.1% calcium, or mixtures thereof, and the balance nickel except for impurties, said alloy in the as-cast condition having a fine grain macrostructure in thick as well as thin sections, exhibiting a microstructure having precipitated carbide particles which are substantially equi-axed in shape and well-distributed through the alloy with a substantial portion of the magnesium and/or calcium content of the alloy concentrated in such particles and at grain boundaries, and displaying in its thick sections a tensile strength and elongation substantially higher than a corresponding thick-section alloy having a microstructure exhibiting script-like carbide particles substantially free internally and at grain boundaries of said carbide shape controller.