US1531827A - Filler rod for fusion welding - Google Patents

Description

J. c'. ARMQR FILLER ROD FOR FUSION WELDING Filed Dec 6, 1922 March 31. 1925.

WI TN E55 I IN VEN TOR.

4% ATTORNEYS.

Patented Mar. 31, 1925.

- UNITED STATES PATENT OFFICE.

FILLER 130D IEOR FUSION WELDING.

Application filed December 6, 1922. Serial No. 605,305.

To all whom it may concern.

Bev it known that I, JAMEs C. ARMoR, a citizen of the United States, and residing in the borough of West View, in the county of Allegheny and State of Pennsylvania, have invented or discovered the new, useful, and Improved Filler Rod for Fusion Welding, of which the following is a specification.

My invention consists in a new and improved filler rod for use in connection with the same.

In joining meta-ls together by fusion welding,.it is evident that no given composition filler rod will produce equally good results with all metals, or even when using the same metal for all classes of work.

Thus, in mild steel, great tensile strength may be required in one class of work, in

another great hardness; in another ductility and softness, etc. v

To obtain the various characteristics required, it is necessary to vary the compo-' sition of the metal or to use alloys.

However, it is'very diificult and very expensive to produce filler rods of certain compositions of metals and certain'alloys, and in many cases the filler rods, when heated, rapidly oxidized and deteriorate. Another difliculty is that certain of the compositions and alloys melt at too low temperatures and others form very large drops, thus preventin the formation of a perfect weld.

or these, and other reasons, it has been found impractical in the past to use many compositions 'and alloys in fusion welding,

although such compositions and alloysare best fitted for the purposes in view.

To overcome these and other difliculties, I abandon the previous practice of attempting to combine the elements in the form of a composition'oralloy in the filler rod, but unite the elements at the point of fusion at the weld.

For convenience and to enable me to properly associate the elements in proper juxtaposition at the weld, I mechanically associate the elements together in the filler rod.

Thus in my improved filler rod, all of the elements of the desired composition or alloy are mechanically associated together in the rod, but are not actually combined until they are melted and deposited in the weld.

/ Thus a'sa preferred form ofmy invention, I use a filler rod consisting of a'tube or cylinder of one metal-surrounding a core composed of the other metal or metals or an alloy of the same. Where a plurality of metals or elements are used I may form the outer tube or the core of two or more elements which may be advantageously combined before being applied to the weld. I also prefer to mix or associate with the material of the core, or if desired, with the material of the outer tube a suitable flux or fluxforming substance or substances, and also, where advantageous, suitable reducing and scavenging elements.

For instance, where nickel steel is required, I may make the outer tube of steel, while the core contains the desired amount of nickel, either as a powder or in the form of a wire, the nickel belng in either case combined or associated with a suitable fiux. Again if bronze be required, the tube may be of copper and the core may contain tin and other desired elements together with a suitable flux. v

I may form the filler rod by using a wire of grooved or U-shaped cross section composed of the metal or metals, which are to form the outer tube, then introduce the element or elements, which are to form the core, in the form of powder into the groove, the walls of the groove being then closed together to inclose the core.

Thus in Fig. 1 of the accompanying drawings, I show in perspective a length of said wire A into whose longitudinal groove'is introduced the core material B, and the walls of the groove are then brought together to form a tube A in closing the core material B. Y

In Fig. 2 I show in persepctive, a filler rod composed of an outer tube- C composed of one or more of the elements, and having its axial bore occupied by a wire D composed of the remaining elements.

It 's evident from the foregoing that my improved filler rod enables me to unite and combine the elements when melted in the weld, and thus avoid the difficulties above mentioned and which have attended the attempts to form a'filler rod of the elements in com osition or alloy.

I desired my filler rod may be used in the manufacture of desired alloys by merely melting the ,rod in a suitable crucible or mold. v

What I desire to claim is 1. A filler rod for use in fusion welding consisting of an outer inclosing wall formed of oneor more elements of a composition metal or alloy, and a central core fOllIlGd of the remannng element or elements togetherwlth a suitable flux.

2. A filler rod for usein fusion welding comprising an enclosed outer well formed of one or more of the elements of a composition metal or alloy, and a central core, enclosed by said outer wall and comprising a mixture of fiux and materials, in powdered form adapted to react with or be added to the metal of the outer'wall after thesame has passed through the are.

De'c'r'nberf 1922.

3. A filler rod for use in fusion Welding consisting of an outer. sheath formed of one or more of the elements of the composition characteristic.

Signed atPittsburgh; a; this 2nd day (51:

JAMES of'ARMoR.

after passage through the .arc with the material-of the outer sheath'to form'an alloy of the desired 20

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