US1587993A - Composition of matter for alloys - Google Patents

Description

Patented June '8, 1926.

UNlTEDiSTATES PATENT OFFICE.

'RAY L. SPITZ'LEY AND ALLEN 12c; rnomrson, or nnrnorrr, MICHIGAN, assrenons r ALLOYS ronxnnx COMPANY, or nn'raorr, MICHIGAN, A conrona'rrox or men:-

' GAN.

' COMPOSITION or. marrna'ro a ALLOYS.

No Drawingorlginal application filed November 15, 1924, Serial No. 750,182. I Divided and this applia cation filed May 25, 1925. ,Serial No. 32,882.

' The alloy herein set forth is a division of the composition set forth in the-patent apelements for formin making non-oxidlzab e castings, and possess- 1 ing elements: nickel; manganese, iron, siliplication filed under date of November I5, 1924, bearing the United States Series Number 750,132, of which a division is required therein. v

Our invention relates to a composition of an alloy suitable for ing high heat resistin properties,

The ob'ect is to pr uce an alloy that'will fuse quic y to steel parts as may be set in the moldfo'r casing therein, and yet solidify rapidly before melting or changing the inclosed .steel section.

' A further object is to produce an alloy that is no'n' oxidizable and cannot be changed inhardness' even when subjected to a big ly oxidizing flame or extreme heat temperatures.

It is common practice in manufacturin valves which are to be used in high spee gas engines, to use a turned steel valve stem and cast an alloy head'thereon' by placing the steel stem within the mold before pouring the molten alloy therein, thereby making a one piece valve which is turned and machined into a perfect mechanical part.

The grade of alloy, having the desired properties may be predetermined by a slight variation of the proportions of the elements comprisin the composition of the alloy. In

high spee engines, especially in aero-plane' engines, where the valves are subject to extremely high heat temperatures, both valve cap and a portion of the valve stem are subjected to highly oxidizing conditions, and which result in man cases in scaling, pitting and warping o the exposed parts of the valve, or annealing and softening the metal, allowing it to jam against the engine valve seat and destroy the valve. An alloy suitable for this purpose requires high heat resisting properties, and such that the molecular properties of the metal cannot be changed nor affected by the heat, and is immune from oxidization' under all conditions. Our alloy is especially adapted for meeting these conditions, and possess properties requisite to the effective manufacturing and operating of high speed gas engine valves.

This alloy being similar in character and properties tothe alloy set forth in the original patent heretofore referred to, although comprisin a different combination of elements. L ke the former patent, it possesses llOIl-OXldlZlIlg and non-molecular changing properties, and is capable of bein rolled into sheets, or drawn into bars wit out effecting the metal in any manner.

" In preparing our alloywe use the followcon, tungsten and copper, properly proportioned and fused together under a high temperature. The preferred proportions of the elements used for producing an alloy of the highest heat and oxidizing resisting properties, are as follows weight:

I Per cent. Nickel 64 Manganese 7 Iron 14 Silicon 2 Tungstem- 1 Oopper 12 This alloy has a fusing point between given in percentage by 3000 and {1000 degrees Fahrenheit, being of sufliciently high temperature to instantly melt and fuse with the surface of any steel partthat may be placed within the mold for casting-in, yet solidify almost instantly before destroying or changing the steel sec tion inclosed, even in the case of thin small rods' as valve'stems, making the steel stem a componentpart of the casting.

- While .theforegoing show the preferred proportions of elements used in our alloy, it is obvious that various modifications of the-proportions of elements therein may be made for producing various grades of alloy, without departing from .our invention. Very efficient results'have been obtained in resulting alloys by varying the proportion In Varying the proportions of any one or metal being similar to and closely associated with the metal cobalt, the resulting property of the alloy, when one metal is substituted for the other therein, is practically the same, we, therefore claim the right to substitute cobalt for nickel throughout this patentwithout departing from our invention (but all references to metals of the nickel group are to include nickeland cobalt only).

' Very good results for commercial castingswhere high-heat resisting and non-oxidizing propertles are not required, as for valves to be used in low powered engines, or'castings under similar conditions, have been obtained by us, by substituting aluminum in the place of v the tungsten in the above formula, and

which we also claim the right of substitu-- tion.

Having fully described our alloy, what We claim as our invention and desire to secure by Letters Patent is:

1. A nonoxidizable alloy comprising nickel 64: percent, manganese percent, iron '15 percent copper.

14 percent, silicon 2 percent, tungsten 1 percent, copper 12 percent.

2. A non-oxidizable making castings which will readily fuse with the surface of inclosed steel parts, com-' prising a metal in the nickel group 64 percent, manganese 7 percent, iron 14 percent,

silicon 2 percent, tungsten 1 percent," and copper 12 percent.

3. A non-oxidizable alloy adapted for making castings or rolled into sheets or bars, comprising of from to percent nickel, from 4 to 10 percentmanganese, from 5 to- 15 percent iron, from 3 percent silicon, from to-'2 percent tungsten, and from 5 to alloy adapted for f1. A non-oxid1zable 'alloy adapted for re sisting high heat temperatures, comprising nickel 64- percent, manganese and silicon 9 percent, iron 1 1 percent, tungsten 1 percent,

copper 12 percent.

5. An alloy adapted for making nonoxidizable and heat resisting castings, comprising nickel 73 percent, manganese and silicon 10 percent, iron 16 percent, tungsten 1 percent. K

In witness whereof tion.

\ I RAY SPITZLEY.

ALLEN M. THOMPSON.

we sign this specifica-.