US987468A - Compound for treating steel. - Google Patents

Description

but preferably consists of an oil.

UNTE

FFTQE.

HARRY MOWER LEE AND FRANK GILLANDERS BOOTH, OF NEW LONDON, CONNECTI- CUT, ASSIG-NORS, BY MESNE ASSIGNMENTS, TO STEEL TEMPERING PROCESS COM- PANY, A CORPORATION OF NEW JERSEY.

COMPOUND FOR TREATING STEEL.

No Drawing.

T 0 all whom it may concern:

Be it known that we, HARRY M. LEE and FRANK Gr. BOOTH, both citizens of the United States, and residents of New London, in the county of New London and State of Connecticut, have invented a new and Improved Compound for Treating Steel, of which the following is a full, clear, and exact description.

This invention relates to a new and improved compound to be used in hardening and tempering steel, and describes the method of using the same.

An object of this invention is to provide a compound which will be simple in nature, inexpensive to manufacture, and surprisingly eflicient in its results under varying conditions.

This and further objects, together with the character and combination of elements, will be more fully described hereinafter and particularly set out in the claims.

In this invention, the material to be treated is heated in any suitable manner, as by means of a gas furnace, a blacksmiths forge, or the like, to the desired temperature, which will vary according to the carbon content of the steel, and also according to the hardness desired. The steel, when heated to the desired point, is then plunged, for the purpose of suddenly cooling, into a bath formed of the compound which is an important part of this invention. This compound preferably consists of a plurality of oxidizing agents intimately mixed in a liquid, which may be of any suitable character, This oil may be of any suitable character, but preferably is of a type having a flashing point of not less than six-hundred degrees Fahrenheit. An oil which has been used with great success for this purpose and therefore preferred is known as auto amber oil The oxidizing agents which are used in this solution are of such a character that they cooperate with each other and with the oil to chemically influence the formation of the cementite, so as to produce a steel of great hardness and the desired toughness. These ingredients are preferably potassium chlorate (KGlO,) and manganese dioxid (MnO It is to be noted that the first of these odixizing agents contains potassium Specification of Letters Patent.

Application filed May 31, 1910. Serial No. 564,160.

Patented Mar. 21, 1911.

and chlorin, and that the other contains manganese. The exact action of these elements in the solution is not known. It may be that by their presence they regulate the formation of cementite and other compounds in the meta], either merely as catalytic agents, or by chemically breaking up into nascent elements or compounds, together with small quantities of the oil, and effect, by chemical reaction, the formation of compounds of the carbon with the iron. However, itis clear that the best results have been obtained with these particular compounds which are oxidizing agents containing chlorin, potassium and manganese. lVhile these ingredients may be mixed in various proportions and obtain eflicient re sults thereby, we have found that the mo t efficient results are obtained by mixing four drains of potassium chlorate, and two drains of manganese dioxid with each gallon of oil.

It has been found that by using this solution as a hardening solution, steels can be hardened to the same degree without the necessity of previously heating the steel to an excessive amount, as has been found in the case of certain types of steels when using other hardening solutions. This solution may be also used in drawing the temper of steel, and in such a case, it is heated to the desired degree, and the steel placed therein until the temper has been drawn the desired amount.

lVhile we have shown one embodiment of our invention, we do not wish to be limited to the specific details thereof, but desire to be protected in various changes, modifications and alterations which we may make within the scope of the appended claims.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 2-- 1. A steel-treating solution, comprising a chlorate, an oxidizing agent, and a fluid.

2. A steel-treating solution, comprising a chlorate, an oxidizing agent, and an oil.

3. A steel-treating solution, comprising an oxidizing agent, manganese dioxid, and a fluid.

4;. A steel-treating solution, comprising potassium chlorate, manganese dioxid, and an oil.

5. A steel-treating solution, comprising potassium chlorate, manganese dioxid, and 1 names to this specification in the presence an 011 having a fiashlng point as high as SlX- of two subscribing WltDGSSQS;

hundred degrees FHhI'QJIhGit.

6. A steel-treating solution, comprising an FRANK GILLANDERS' BOOTH oxidizing agent, and an oil having a fiashi ing point at least as high as six-hundred del Vitnesses: grees Fahrenheit. G. H. PHILLIPS,

In testimony whereof We have signed our XVILLIAM H. CLARKE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.