Patented July 14,1942 2,289,566
UNITED STATES PATENT OFFICE
2,289,566
NICKEL-BERYLLIUM ALLOY
Carlo Adamoli, Milan, Italy, assignor to Perosa Corporation,
Wilmington, Del., a corporation of Delaware
Application December 21, 1939, Serial No. 310,367
In Italy June 30, 1937
4 Claims. (CI. 148—13)
The present application relates to a method for improving nickel-beryllium alloys and is a continuation-in-part of my prior application Serial No. 172,871 filed on November 5, 1937, and Serial No. 226,290 flied on August 23, 1938.
It is well known that from the technological point of view a metallic alloy is the more appreciated the more its structure is homogeneous and the higher its physico-chemical characteristics such as hardness, mechanical tensile strength, elasticity, resistance to corrosion and the like are.
In the course of the last years various beryllium-nickel alloys have been proposed, but for none of them the necessity of insuring a practically homogeneous structure with the maximum of the above-mentioned physico-chemical characteristics on a commercial scale has been taken into account. Nor in the methods of thermal treatment which have also been proposed for these Ni-Be alloys has the great importance of a perfectly homogeneous structure been taken into account. It results therefrom that with the present alloys inconveniences are frequently en-countered which are due to the unavoidable separations or to the heterogeneousnesses which are not absorbed in a perfect manner at the moment of the solidiflcation of the alloy.
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