US974419A - Process of making copper alloys and the product thereof. - Google Patents

Description

f UNITED STATES PATENT OFFICE.

JAMES NAULTY AND LIOHN SCANIIIN, 0F PHILADELPHIA, PENNSYLVANIA.

PROCESS OF MAKING COPPER ALLOYS AND THE PRODUCT THEREOF.

No Drawing.

To all whom 'it may concern:

Be it known that we, JAMES NAULTY and JOHN SOANLIN, citizens of the United States, residing in the city of Philadelphia, State of'Pennsylvania, have jointly invented certain new and useful Improvements in Processes of Making Copper Alloys and the Products Thereof, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

Our invention relates to a process of making chromium alloys of copper, compounded with nickel and other metals, and to the new composition metal which is the product thereof, and has for its object to produce a,

copper alloy which is of great tensile strength and incidentally of suflicient hardness, approximately that of ordinary steel, to made edged tools therefrom; and is Well adapted for rolling, welding and forge work.

To these ends the invention consists of a particular method of compounding the elements of the composition, and the product thereof which is. copper or its natural alloys combined with chromium and nickel, and with a relatively small proportion of aluminum and of zinc. The resultant composition is essentially a copper alloy in which the chromium element is melted with the copper in approximately the ratio of five parts by weight of the former to one hundred and ten parts by weight of the latter; also in which ap roximately twenty-five parts by weight, of nickel, to one hundred and ten parts of copper, are combined in the crucile; these elements, in or about the proportions stated being employed with twentyfive parts by weight, 1n the aggregate, of

zinc and aluminum, as hereinafter stated.

In carryin out the process to produce the new alloy, rom the elements and in the quantitative ratios stated, five pounds of chromium are melted in a crucible with five ounds of aluminum of commerce, used as a ux, and which, with, natural draft, "will occupy about ,one hour, whereupon one hundred and ten poundspf copper are added to the mass in the crucible and melted, under a continued application of the same heat for.

about thirty minutes; after which twenty- Specification of Letters Patent.

Application filed July 23, 1910.

Patented Nov. 1, 1910.

Serial No. 573,525.

| five pounds of nickel are placed in the crucible and which will combine with the other elements, in a molten 'mass in about one hour; and finally twenty pounds of zinc are added, which melts almost instantaneously, and is employed principally for bulk or body purposes. Although the ratio stated of chromium to copper and of nickel to copper are approximate only and may be slightly varied, the order stated in which the elements are admixed .in the crucible, and the employment of aluminum as a flux, with the chromium, are essential; and finally it must be understood that our new composition metal is essentially a copper alloy. It has a slightly reddish tinge, and tests of it, made from the formula above given, showed a tensile strength of 78950 pounds. In both these respects it differs materially from the composition metal of copper and chromium combined with nickel and zinc, described in U. S. Patent No. 959,156 granted to us May 24, 1910, in which the large proportion of nickelgives predominating color and characteristic to the composition, with erhaps greater hardness than our present a1 oy, but with decidedly less tensile strength, tests of it showing but 45000 pounds approximately.

I-Iavin thus described our invention, we

claim as new and desire to secure by Letters Patent 1. The process of com oundin a chromium alloy of copper, com ined with nickel,

which consists in melting the chromium with aluminum as a flux, then adding the copper, nickel and a suitable bulkin metal to the molten mass successively an in the order stated.

2. The product of the process described which is approximately a five per cent. chromium alloy of copper, combined with nickel in the ratio of approximately five parts by weight of said copper alloy to one part by weight of nickel.

3. The new product described which is approximately a fiveqper eent. chrom1um alloy'of copper fiuxed w1th aluminum, combined with nickel in the ratio of approximately five parts by Wei ht of-said copper.

alloy to one part by weig t of nickel.

4. The new productqldescribed which iet approximately a five per cent. chromium aflixed our signatures this twenty-first day iglloy1 of e(l)lpperkfiiixediwith alumlilnum, comof July A. D. 1910.

ine Wit nic e an zinc in t e ratio, in the aggregate, of approximately one hundred and twenty pounds of said copper alloy to forty-five pounds, in the aggregate, of Witnesses: nickel and zinc. A. M. BIDDLE,

In testimony whereof, We have hereunto. R. A. DUNLAP.