US1550730A - Alloy - Google Patents

Description

75. METALLURGY.

Patented Aug. 25, 1925.

UNITED STATES PATENT OFFICE.

EMIL MAASS, OF BERLIN-HALENSEE. GERMANY, ASSIGNOR OF ONE-HALF TO MAR- BURG BROTHERS, INC.. OF NEW YORK, N. Y.. A CORPORATION OF NEJV YORK, AND ONE-HALF TO R. STOCK 8a (30., SPIR-ALBOl-IRER, WEEKZEUG-, 86 MASGHINENFABRIK A. G., O'F BERLIN-MARIENFELDE, GERMANY, A CORPORATION OF GERMANY.

ALLOY.

No Drawing.

To all whom it may concern:

Be it known that I, EMIL MAAss. a citizen of Germany, residing at Berlin-Halensee. Germany, have invented certain new and useful Improvements in Alloys, of which the following is a specification.

The invention relates generally to metallic alloys, and more particularly to an alloy composed chiefly of small quantities of c gpper u in um.

he ma iiiob'j ect of the iiive s to produce an alloy of the class referred to, which shall he possessed of unusual tensile strength and capable as well of resisting extraordi nary compression, besides withstanding heavy shocks and sustained concussion.

In carrying out the invention, the best results are obtained by compounding one hundred parts of zinc with about three parts of copper and approximately five parts of aluminum.

Slight variations in the respective proportions of the several ingredients employed in producing this alloy will not materially affect the essential qualities thereof herein mentioned, but in practice it has been found that, in order to gain these qualities, the quantity of the aluminum plus that of the copper must be over six per centum, but not more than eight and five tenths per centum of the whole compound.

A peculiar feature of the invention. which may be inferred from the foregoing, is that even if the copper and the aluminum together are added to the zinc according to the percentage above specified. the resulting alloy will exhibit its most desirable qualities only when containing a greater quantity of aluminum than of copper.

The alloy above described has a high tensile strength and offers great resistance to heavy shocks, so that it can be used very advantageously in the manufacture of articles requiring these characteristics, such for instance as bearings, bearing-bushings,

Serial No. 498,479.

compression rings or guide bands for pro jectiles. die-castings, and so forth. Among other advantages possessed by this alloy over alloys which contain a larger percentage of copper is that of greater cheapness, and also of higher tensile strength combined with increased resistance under shock. Besides, it is softer and less brittle. Moreover, it is superior to other alloys wherein the component parts are mixed in different proportions. Another advantage of this new alloy resides in that its tensile strength, toughness, and ductility are susceptible of being materially augmented by subjecting it to mechanical treatment, such as pressing, rolling. and the like.

The alloy described herein, furthermore, difiiers greatly from some other apparently similar alloys containing tin, for instance, which does not combine permanently with aluminum, the same forming always a poor mixture, rapidly deteriorating .within a short time. whether stored or in use. On the contrary, the ingredients used in this new alloy, when apportioned in the relative quantities and within the particular limits set forth, form a permanent compound, which perpetually retains its good qualities aforementioned.

Having now described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

1. An alloy of the character described, consisting of one hundred parts of zinc a proximately three parts of m semi about five parts of algminum.

2. An alloy of tmai acter described, consisting of zinc, copper and aluminum, the combined amounts of copper and aluminum exceeding six per cent but not more than eight and five tenths per cent of the whole, the individual amounts of copper and aluminum, being respectively approximately three per cent and five per cent of the Whole.

PROF. DR. EMIL MAASS. [n a]