US1480706A - Forgeable alloy of iron and nickel - Google Patents

Description

Patented Jan. 15, 1924.

UNITED STATES PATENT OFFICE.

TRYGVE D. YENSEN;-OF SWISSYALE, PENNSYLVANIA, ASSIGNOB TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

FORGEABLE ALLOY O]? IRON AND NICKEL.

No Drawing.

To all whom it may concern:

Be it known that I, TRYGVE 1). YnNsn'N, a

citizen of the United States, and a resident of Swissvale, in'the county of Allegheny 5 and State of Pennsylvania, have invented a new and useful Im rovement in Forgeable" Alloys of Iron and ickel, of which the following is .a specification.

My invention relates to alloys ofiron and be readily forgeable over a wide range of temperatures.

It has been known for some time that pure 1 alloysof iron and nickel do not forge readily at ordinary forging temperatures and it is necessary, in order to make them forgeable,

- to add small amounts of some alloying element. Manganese has been used for .this

2 purpose to such extent that it has come to be regarded as a necessary constituent of nickel steels. Y

I- have'now found .that titanium can also be used to make iron-nickel alloys forgeable 26 and that this element serves the purpose even more effectively than manganese. In practising my invention, a suitable proportion of titanium is combined with the iron and nickel forming the alloy in .any manner desired, the proportion of titanium employed depending upon the relative proportions of nickel and iron in the alloy and, to some extent, upon impurities which may be present in the -metals employed.

I have ascertained, however, that, by the addition of from 0.1 to 1% titanium, all

iron-nickel alloys are rendered forgeable at all temperatures from black up to bright red heat, thatis at temperatures ranging from below 500 to over 900,C. a

While I do not wish to be. restricted to any alloyscontaining to 100% nickel and the remainder iron, an addition of titanium to the amount of 2% of the iron content will Application filed April 18, 1919. Serial No. 290,922.

insure satisfactory results.- In other words, the amount of titanium employed in any iron-nickel'alloy may comprise substantially 2% of the content of the lesser metal.

I have found that iron-nickel alloys contaming titanium are more readily forged at ordlnary temperatures than corresponding alloys containing manganese and that this is particularly true if the titanium is present in substantially the proportions above specified. Of course, if manganese is present as an impurity, the amount of titanium added should be less, and it is possiblethat the presence of certain other impurities may also require a slight change in the proportion of titanium employed. For these reasons, I do not wish, in anyway, to limit my invention but intend, intlie appended claims, to cover it as broadly as the state of the art permits.

I claim as my invention:

1. A forgeable alloy comprising unequal quantities of iron and nickel and a relatively small amount of titanium, the amount of titanium varying in proportion to th amount of the lesser metal present.

I 2. A forgeable alloy comprising unequal quantities of iron- 'and nickel and a small amount of titanium, the amount of titanium being substantially 2% ofthe amount of the lesser metal present. 3. A forgeable alloy comprising iron, a lesser amount of nickel and a relatively small amount of titanium, the amount of titanium varying in proportion to the amount of nickel present.

4. A forgeable alloy comprising iron, a

lesser amount of nickel and titanium, the

TRYGVE D. YENSEN.