US1126484A - Method of manufacturing composite metallic articles. - Google Patents

Description

UNITED STATES PATENT OFFICE.

JOHN KIRIBY, 0F PITTSBURGH, PENNSYLVANIA.

METHOD OF MANUFACTURING COMPOSITE METALLIC ARTICLES.

No Drawing.

To all whom it may concern:

Be it known that I, J on) Kinny, acitizen of the United States of America, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Methods of Manufacturing Composite Metallic Articles, of which the following is a specification.

This invention relates to a method of manufacturing composite metallic articles, particularly copper coated iron and steel sheets or bars, or in other words a composite sheet or bar having an iron or steel center and a copper coating, and has for its object to provide, in a manner as herein after set forth, a method of copper coating whereby the tensile strength of the copper will be increased and the copper will be thoroughly welded with the iron or steel center.

It is a well known fact that when copper is brought to too high heat, say between 2300 to 2400 Fahr. that the life of the copper is taken therefrom and that the copper becomes dry andfull of blow holes, un-.

der such conditions becoming very unsatisfactory for any use. To overcome this objection of high heating is one of the objects of the method herein described, as the bath which contains copper, in which the metal is immersed forcoating, is maintained between a boiling heat and 2200 Fahn, never rising above 2200 Fahr.

It is also a well known fact that when merchant iron is brought to a degree above a high welding heat that the iron becomes burnt and scales to cinders, which makes the iron unfit for use. This same statement also applies to steel; To overcome the foregoing objections, the iron and steel, when ready for immersing in the bath in accordance with the method as herein set forth, is

v the coating bath.

In carrying the method into'eifect a suitable quantity of commercial copper is placedin a suitable receptacle and brought to a I Specification of Letters Patent.

Patented Jan. 26, 1915.

Application filed November 28, 1913. Serial No. 803,439.

molten condition. by bringing the copper to tensile strength thereof. When the vanadium-aluminum alloy is placed into the molten copper, the alloy is at a temperature of 35 0O Fahr., the molten copper being about 2100 Fahr.

The percentage relative to the proportions of the ingredients of the bath, by way of example, vanadium eight to twenty-five hundredths, aluminum six to twelve hundredths, A

the balance being copper.

It is well known that vanadium has a great afiinity for iron and steel, under such conditions it causes, when the iron or steel center is coated with the amalgam alloy, :1 high weld between the center and the copper. When the center is immersed in the vanadium aluminum copper bath, it is at a heat from l200 to 1500 Fahn, and remains in the bath from three to five minutes.

It is well known that copper cannot be packed and rolled without sticking, but by coating in a manner as stated, the copper has the tensile strength thereof increased and the composite article can be rolled without sticking at the required'heat and that the articles when packed will be prevented from sticking due to the vanadium hardening the copper.

Briefly described the method consists in bringing a quantity of commercial copper in a suitable receptacle to a molten condition by heating the copper to a temperature about 2100 Fahr. Then combining vanadium and aluminum toprovide a vanadium aluminum alloy. The temperature of the alloy being about 3500 Fahr. Then combining the vanadium and aluminum alloy at the temperature stated with the molten copper, under such conditions providing a bath consisting of copper, aluminum and vanadium and maintaining the said bath at a temperature of about 2100 Fahr., then taking the article to be coated at a temperature of 1500 Fahr., and immersing the article into the bath, the article to remain in the bath from three to five minutes, then removing the coated article, and if desired immersing the same again for a period of one minute. The coated article can then be treated in any desired manner. After the coated article has been removed from the bath it is at a temperature of 2200 Fahr. and it is rolled to thoroughly complete the weld.

What I claim is:

1. A method of coating iron and steel consisting in providing a molten bath of cop per, aluminum and vanadium, and then immersing into said bath the article to be coated.

2. A method of coating iron and steel which consists in immersing the article to be coated in a molten bath including copper and Vanadium.

3. A method of coating iron and steel consisting in providing a molten bath of copper, aluminum and vanadium, maintaining said bath at a temperature of about 2100 Fahia, then immersing a metal article brought to a temperature of about 1500 Fahn, in said bath, then removing the coated article.

A method of coating iron and steel consi sting in providing a molten bath of copper, aluminum and vanadium, maintaining said bath at a temperature of 2100 Fahn, then immersing into the bath the article to be coated, and then removing the coated article.

In testimony whereof I aflix my signa ture in the presence of two Witnesses.

JOHN KIRBY. Witnesses:

MAX H. SROLOVITZ, N. L. BOGAN.