US1637619A

US1637619A - Method of producing welding metal

Info

Publication number: US1637619A
Application number: US69334A
Authority: US
Inventors: Lucas Anton
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-11-16
Filing date: 1925-11-16
Publication date: 1927-08-02
Anticipated expiration: 1944-08-02

Description

Aug. 2, 1927. 1,637,619

A. LUcAs METHOD 0F ,PBODUCING WELDING METAL Filed Nov. 16, 1925 INVENTOR Y iff/gf? 05H61 A'TTORNEY Patented Aug. 2,1921.

U N I T E D STATES PATENT o-FFiCE.

ANTON LUCAS, 0F KANSAS CITY,MISSOURIA IITHOD OF ZPBGDUCING WELDING 'appiicazion nica November is, 1925. serial mi. 69,334.

rails, with a metal product from a mixture 1y in the Crucible.

reaction is ra operator and of iron-oxide and powdered aluminum i or other reducing metal or alloy, by interaction of such elements after ignition in a Crucible.

The usual method of effecting such reduction has heretofore been to place the mixture in a plugged Crucible, ignite the mixture and permit the reduction to progress downward- While this method has been effective in so far as the reduction is Concerned, it involves objections due to the nature of thematerial.

Reaction .of an alumino-thermic mass is violent, proceeds downward with much greater rapidity than upwardly or laterally, and when occurring in a crucible,results in the steel beingquickly separated fr oin the slag. Consequently, when reaction is in1ti ated at the top of the crucible, Asteel is not available at the tap hole until the entire mass has been reduced, and while this downward` id, this method results `in a spattering of t e contents, with danger to the loss of material, which tends to lower the uality of the steel.

I have ound that by initiating the reaction at the bottom of the Crucible, these objections are overcome, a better quality of steel results, and on the Crucible which tends to prolong its life. r

In Connection' with my improved method I employ a Crucible and ap urtenances, the preferred form of which is. illustrated in the accompanying drawing wherein f 1 designates a Crucible of the type usually employed for .such purposes, preferably Comsed o f Castl 'ron or Cast steel and avii'ig walls of suiiicient thickness to carry of heat erated by the reaction Carried on within it, the Crucible being lined with refractory material if desired, although such lining is `not an essential element wit my method, for the reasons resently stated.

The Cruci le has a tap hole 2 at its lower end, preferably lined with refractory maa beneficial effect produced v terial 3, and extending through the vta hole is the usual pin 4 having a head 5 c osing the hole within the Crucible. I prefer to cover the head of the pin with a bed of wdered refractory material 6 to protect 1t from the heat from the melting material, the ystructure above described being similar to that ordinarily used for such urposes.

In practicing my method, owever, I place a'quantity of 1 nition powder 7 in the bottom of the crucib e, over the pin and iefractory material. I then insert a tube 8 into the receptacle so that it rests on the ignition powder, and then fill the receptacle above the ignition powder yand about the tube with, the alumino-thermic mixture 9. I then ignite the ignitionpowder by vdropping a match or projecting a hot rod 10 through the tube into Contact with the pow-der. The burning powder setsup a re'- action in the mixture, melting the elements. The molten steel being the heavier, settles to the bottom of the Crucible, and the slag, being the lighter, floats to the top. As the reaction progresses, the slag coming in Contact with the relatively Cold wall of the Crucible, is Chilled. and adheres to the Cru- Cible, `formin a Coat thereover, which protects the Crucible from the molten steel and confines the heat.

It is ap arent that as the reaction starts from the ttom and progresses upwardly through the mass in the crucible, the spettering is avoided. The reaction is slower but less violent and separation of the elements more thorough and the natural separation of the elements of different gravit results in the sla `linin .the Crucible in a Vance of level of t e mo ten steel, thereby affording better rotection for the Crucible than in a methodpwherein theA reaction is initiated in the .top of the mass and progressed downwardly. f- 1 'WhatI Claim and desire to secure by Letters-Patent is y 1. The method of effecting alumino-ther mic reaction, Consisting of locating an ignition element in the bottom of a Crucible, locating an ignition conduit above said element, locating analumino-thermi'c mixture within the Crucible above the ignition ele-l ment and about the conduit, and assinganigniting element through the con uit to the ignition element.

2. The method of effecting alumiiio-thermic reaction, consisting of locating an Y g Y insigni@ alumino-thermic mixture in a crucihe, ioaumino-thermic mixture in a crucible, io-

.cating an ignition element below the surface eating an ignition element below the surfce 10 of the said mixture,A locating ani ignition conof said mixture, iocating an ignition conduit duit above the ignition element', and passing in communication with said ignition element 5 an igniting element through the conduit to and passing an igniting element through the the 1 'tion element. conduit to the ignition element.

\ 3. lhe method of eecting -aiumino-ther- En testimony whereof I aix my signature.

mic inaction, consisting oi locating on ANTON LUCAS.