US1915212A - Alloy - Google Patents

Description

Patented June 25, 1933 UNITED STATES PATENT OFFICE ANDREW J. BOYLES AND FLORISM. MCKINLEY, OF CIARKSBUR-G, WEST VIRGINIA ALLOY No Drawing.

This invention relates to alloys. The alloy 10 may be added to the alloy, either with or without the aluminum and/or the amalgam, I

the manganese making the alloy tougher and the nickel making it harder.

In practicing the invention, the aluminum 5 used in the alloy is melted in a cast iron pot to a temperature of about 800 to 900 degrees Centigrade. It is then stirred thoroughly admixed with an onion. As it is being stirred admixed With the onion, the oxides that appear on the aluminum are skimmed off. This step in the process produces clean aluminum. The amalgam is next prepared by taking 3 ozs. of clean zinc and melting the same and then stirring until the zinc begins to stiffen. 1 oz. of mercury is then added to the zinc and the mixture is stirred until it stiffens.

160 ozs. of tin are then heated in a cast iron pot. To the molten tin are added 3 ozs. of copper, 16 ozs. of aluminum, treated as above described, and 112 ozs. of clean zinc. This mixture is, when molten, stirred briskly with the admixture of an onion, the oxides being skimmed off as they appear. 1 gram of the amalgam prepared as above described is then added to the mixture of tin, copper, aluminum and zinc and the stirring is continued, the oxides being skimmed off. In lieu of the cast iron pot, a graphite crucible may be used. The above process provides an alloy consisting of about 55% tin, 38% zinc, 1% copper, 5.5% aluminum, and .01% of an amalgam consisting of mercury and 75% zinc. One of the uses of our new alloy is as a welding material for aluminum castings. In welding a casting with the same, a Vshaped cut is'made in the casting which is then heated adjacent the V-shaped cut. The degree of heat is about 600 degrees Fahrenheit. The casting at the V-shaped cut Application filed December 29, 1931. Serial No. 583,792.

should be brushed thoroughly wvhile it 1s hot. A bar of the alloy is. then rubbed on the surface of the cut portion of the casting to deposit a layer thereof. The

deposit of the alloy is then brushed Well.

The V-shaped cut is then filled with the alloy, which is a plastic metal which may be worked like putty. After the weld is filled With the alloy, it should be wiped with the cloth; this makes the Welded part scarcely detectable.

The alloy is also useful as a high speed bearing metal, so that pistons may be coated .Wlth' it, with the result that the life of the cylinder walls are seven times greater than they would be if the pistons were not that recommends itself is that it Will not oxidize. Sheet aluminum coated With this alloy may, due to the fact that the latter does not oxidize, be used for roofing, etc.

Before our invention of the mentioned alloy, the bottoms of tubs and buckets had to be spun instead of being welded due to the fact that the bottom had to be heated to such an extent that the expansion and contraction resulting from the heating produced an impractical job. Employing our alloy, however, the aluminum need not be heated to such a high degree that the expansion and contraction interferes with producing an efficient Weld.

A crank case may be welded by means of our improved alloy, without removing the crank case from the car. Then there is a bad break in the crank case, the same may be welded with our alloy Without preheating the case. Furthermore, a piece of aluminum or other metal to which our alloy will adhere, may be soldered to aluminum.

Our improved alloy will actually penetrate aluminum. This is proved by the fact that aluminum piekeled in the molten alloy, when machined to the original size, Weighs more than the original piece of aluminum.

The following are some of the advantages and qualities of our improved alloy. It is non-oxidizing; large castings do not have to be preheated when welded with it; aluminum may be welded without danger of warping; skill is not required to effect a weld with the same; crank cases may be Welded without removing them from cars; holes of any size may be filled with this metal; it adheres securely to aluminum; it is a high speed bearing metal; solder may be 'applied to it; other metals may be soldered to it; aluminum will absorb it; worn out skirts of pistons may be reconditioned with it; it is very plastic; it has greater tensile strength than aluminum; it is practically the same" color as aluminum so that in aluminum welded with it, the weld can hardly be detected; it may be drilled, tapped and threaded and it may be employed as a nonoxidizing coating for containers.

What is claimed is: i y b An alloy comprising the following metals in about the following percentages: 55% tin, 38% zinc, 1% copper, 5.5% aluminum, and .0l% of an amalgam consisting of 25% mercury and 75% zinc.

In testimony whereof we signatures.

' FLORIS M. MOKINLEY.

ANDREW J'. BOYLES.

hereby afiix our