Castings from alloys having large liquidius/solidus temperature differentials
AssigneeBrush Wellman Inc.
InventorDon H. Hashiguchi
Life of this patent
Estimating the term…
Abstract
The casting porosity of an unwrought casting made from an alloy having a large difference between its liquidus and solidus temperatures is reduced by subjecting the casting to hot isostatic pressing.
Claims20
A process for enhancing the properties of a casting made by turbocasting a molten alloy composed of 8 to 16 wt. % Ni and 5 to 8 wt. % Sn, with the balance being Cu and incidental impurities, the process comprising subjecting the casting to hot isostatic pressing.
A process for enhancing the properties of an unwrought casting having a minimum thickness dimension of 1 inch and being made from an alloy having a difference of at least 100° C. between its liquidus and solidus temperatures, the process comprising subjecting the casting to hot isostatic pressing.
A casting having a minimum thickness dimension of 1 inch, the casting being made by turbocasting a molten alloy composed of 8 to 16 wt. % Ni and 5 to 8 wt. % Sn, with the balance being Cu and incidental impurities, to form an as cast ingot and thereafter subjecting the as-cast ingot to hot isostatic pressing.
An unwrought casting having a minimum thickness dimension of 1 inch and being made from an alloy having a difference of at least 50° C. between its liquidus and solidus temperatures, the casting being subjected to hot isostatic pressing and having a porosity of 50% or less of the porosity of an otherwise identical casting not having been subjected to hot isostatic pressing, as measured by the number per square centimeter of pores having a diameter greater than 100 microns.
Dependencies are inferred from the claim text.