US1836401A - Composition of matter for welding copper and steel - Google Patents

Description

Patented Dec. 15, 1931 UNITED STATES PATENT OFFICE COMPOSITION OF MATTER FOR WELDING COPPER AND STEEL No Drawing.

This invention relates to a composition of matter for use in joining copper, brass, bronze and other metallic bodies to iron, steel and various iron alloys.

This invention consists of a composition having a new and novel mixture of ingredients as will be hereinafter described and pointed out in the claims, it being understood that changes may be made in the scope of the claims without departing from the spirit of the invention claimed.

In practice it is first necessary to use a mixture of the following ingredients in the proportions stated, namely, I

Copper 12 parts by volume Zinc 12 parts by volume Lead.. 1 part by volume.

The foregoing ingredients are melted and mixed. The mixture is allowed to cool and is then ground to a finely comminuted condition.

Four parts of the pulverized preparation 5 are mixed with five parts of borax and one part of copper sulfate.

The iron or "steel to which the copper is to be joined is heated to between 1400 F. and 1500 F. Borax is applied to prevent oxidation. The area to be treated is then lightly sprinkled with a coating of the composition. The temperature of the iron or steel is then increased to about 1900 F. and after about 1 minutes all signs of the composition will have disappeared. Copper at a temperature of approximately 2050 F. is then applied either by pouring, dipping or otherwise.

This composition, when used as explained, can be employed efliciently as a welding flux on any grade or on any alloy of iron or steel whereby copper or copper alloys can be joined thereto or used for plating.

The described composition can also be used in joining both brass and bronze to iron, steel, or iron alloys. If brass is'used it is applied at approximately 1900 F. while bronze is applied at approximately 1750 F.

Metals joined as described will be held together securely and the joint will resist ex- Application filed. March 24, 1931. Serial No. 525,034.

cessive compression, tensile and torsional strains.

What is claimed is: v

1. A flux for use in joining copper to iron or iron alloys including a material mixed with borax and copper sulfate, said material lncluding copper, zinc and lead mixed while in a molten state and subsequentl cooled and reduced to a finely commlnute state.

2. A flux for use in joining copper to iron 00 or iron alloys, including five parts of borax and one part of copper sulfate mixed with two parts of a comminuted preparation consisting of copper, 12 parts, zinc, 20 parts and lead, 1 part which have been mixed while 5 in a molten state, cooled and reduced to a comminuted state.

3. A flux for use in joining copper or copper alloys to iron or iron alloys including a material mixed with borax and copper sulfate, said material including copper, zinc and lead mixedwhile in a molten state and sub sequently cooled and reduced to a finely comminuted state.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature.

EMANUEL J. SCHAFFNER.

CERTIFICATE OF CORRECTION.

Patent No. 1,836,401. Granted December 15, 1931, to

EMANUEL J. SCHAFFNER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, line 17, for "Zinc 12 parts by volume" read Zinc 20 parts by volume; and that the said Letters Patent should'he read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 16th day of February, A. D. 1932,

M. J. Moore, (Seal) Acting Commissioner of Patent.