US1587992A - Composition of matter for alloys - Google Patents

Description

Patented June 8, 1926;

UNITED STATES PATENT OFFICE.

RAY L. SPITZLEY AND ALLEN M. THOMPSON. or DETROIT, MICHIGAN, AssIoNoRs TO ALLOYS FOUNDRY COMPANY, 015 DETROIT, MICHIGAN, A CORPORATION OF MICHI- any.

No Drawing- Original application filed November 15, 1824, Serial No. 750,132.-

COMPOSITION, or MATTER son ALLoYs.

cation filed May 22, 1925. Serial No. 32,182.

The alloy herein set forth is a division of the patent application filed by these 1nventors under the date of Nov. 15, 1924,in

the United States Patent Ofiice, under-the Series Number 750,132, and according to a division required therein.

Our invention relates to a composition of metals and elements suitable for making a non-oxidizing, heat resisting alloy, and having special properties for making it immune from the effects of highly oxidizing flames.

The object of our invention is to produce an alloy suitable for making high speed valve castings, and which willinstantly fuse to the surface of inserted steel parts yet solidify before melting or changingthe steel.

Another object is to produce analloy having special properties for resisting any molecular change in the metal even when subjected to heat approaching the melting point of the alloy.

A further object is to produce a nonoxidizing alloy that will not scale or pit under highly oxidizing conditions.

A further object is to produce an alloy that may also be rolled into-sheets or drawn into bars without destroying or changing the structure of the alloy.

The special purpose for which this alloy was originally designed was for manufac turing valve castings for high speed engines, and where they are subjected to high heat temperatures and highly oxidizing conditions, yet the alloy is equally as well adapted to any casting of similar nature or placed under similar conditions, and while we describe its use and application to an engine valve, we include and intend to include therein the application of this'alloy to any casting, or use, subjected to similar operating conditions.

It is the general practice, or commonly known, that in the manufacturing of certain types of valves for high speed gas engines, where high temperatures and oxidizing conditions prevail, the valve is made of a two piece construction, using a turned steel valve l,eak, becoming useless.

metal in the valves subjectedto these conditlons, ordinarily will fail because of scaling,

Divided and this ap le pitting or warping, and are annealed un- 1 'der the constant high temperature of the burning gas, causing the valve to jam and I Because of these verity of the engine shocks when operating under high speed, the two piece valves must fuse the two metals together intoa solid piece. I This requires an alloy of an extremely high melting point which will insure instant fusing with the surface of steel parts inserted therein within the mold, yet solidify quickly before destroying or changing the inclosed steel part. Our alloy is especially adapted to meet all of these conditions as are required for Valve castings, and for,"

other castings where used under high heat temperatin'e.-.- and subjected toa highly oxidizing flame, and possess a non-oxidizing and heat resisting properties even to nearly the melting point of the metal.

Inpreparing our alloy we use the following elements; nickel, chromium, manganese," iron, silicon and tungsten. The preferred proportions used for producing an .alloypf the highest heat resisting properties, are as follows given in percentage by weight:

Per cent. Nickel ms Chromium i 8 Manganese 7 Iron 26 Silicon 2 Tungsten 1 This allov has a melting point between 3000 and 4000 degrees Fahrenheit, and will fuse to the surface of steel parts instantly upon contact therewith. solidifying before changing or distorting the inclosed steelsection.

The silicon and manganese combining to form a non-oxidizing property, preventing the scaling or pitting of the metal under highly oxidizing conditions.

While the foregoing sets forth the preferre d proportions it is obvious that a variation ofthese proportions between certain limits may be made. producing different grades of alloy, without departing-from our invention. Very good results are obtained by varying the proportions of the elements between the following limiting proportions given in percentage by weight Per cent.

Nickel fromuu 50 to 60 Chromium from 5 to Manganese from 2 to 12 Iron tro1n 15 to 35 Silicon from to 4 'lfungsten from to 3 As the proportions of any one or more of the above elements are varied, it is obvious the grade, and the resulting resisting propcities of the alloy will also be varied ac- Qcidiiigly, and may be predetermined as desired for any particular grade, depending upon the requirements in the place in which it is to be used.

It is known, and has been determined by these inventors, that nickel-andcobalt having very similar properties and belonging to the same group (and being the only metals of the nickel grouo .herein referred to or included), that the substitution of the cobalt in the place of the nickel will produce an alloy of the same properties, the resuits being almost identical. We, therefore, claim the right to substitute the cobalt in the place of the nickel throughout this patent, and without departing from our invention.

Very good results have been obtained by substituting aluminum in the above formula for the metal tungsten for the hardening agency, although the resulting alloy does not possess as high heat resistingand non-oxidizing properties yet will produce a very good commercial casting.

Having full described our composition for an alloy, w iat we claim as 'ourinvention and desire to secure by 1. A non-oxidizing, heat resisting alloy Letters Patent is adapted for using with cast-in steel parts, comprising nickel 56 percent, chromium 8 percent, manganese 7 percent, iron 26 percent, silicon 2 percent, tungsten 1 percent.

22.15.11 alloy having high non-oxidizing and heat resisting properties, comprising percent of metals from the nickel group, 8 percent of chroi'nium, 7 percent of manganese, 26 percent iron, 2 percentsilicon, and 1 percent tungsten.

A non-oxidizing allo Y comprising lot from :30 to 60 percent nicltcl, from 5 to ll) percent chromium, from 2 to 12 percent manganese, from 15 to percent iron, from to -l percent silicon, from /,;.to 2 percent tungsten.

A non-oxidizable, heat resisting alloy adapted for making combination castings of alloy and cast-in steel parts, comprising nickel 56 percent, chromium 9 percent, man

ganese 7 percent, iron percent, and silicon 2 percent. I

5. An alloy having high non-oxidizing and heat resisting properties, adapted for iii-airing castings having steel cast-in parts, comprising nickel 56 percent, chromium 9 percent, manganese 9' percent, and iron 26 percent.

(3. An alloy comprising nickel percent, chromium 8 percent, manganese 9 percent, iron 26 percent, and tungsten 1 percent.

7. A non-oxidizing, heat resisting alloy adapted for casting metal parts in combination with steel parts, comprising metal of the nickel group 56 percent, chromium 9 percent, manganese 9 percent, and iron 26 percent.

In Witness whereof We sign this specification.

RAY L. SPITZLEY. ALLEN M. THOMPSON.