Abstract: A piercing machine includes a plurality of skewed rolls, a plug, a mandrel bar and an outer surface cooling mechanism. The outer surface cooling mechanism is disposed around the mandrel bar at a position that is rearward of the plug, and with respect to an outer surface of a hollow shell advancing through a cooling zone which has a specific length in an axial direction of the mandrel bar and which is located rearward of the plug, as seen from an advancing direction of the hollow shell, the outer surface cooling mechanism ejects a cooling fluid toward an upper part of the outer surface, a lower part of the outer surface, a left part of the outer surface and a right part of the outer surface of the hollow shell to cool the hollow shell inside the cooling zone.

Abstract: Disclosed herein are processes for hot rolling billets of uranium that have been alloyed with about ten weight percent molybdenum to produce cold-rollable sheets that are about one hundred mils thick. In certain embodiments, the billets have a thickness of about 7/8 inch or greater. Disclosed processes typically involve a rolling schedule that includes a light rolling pass and at least one medium rolling pass. Processes may also include reheating the rolling stock and using one or more heavy rolling passes, and may include an annealing step.

Abstract: Methods of fabricating a uranium-bearing foil are described. The foil may be substantially pure uranium, or may be a uranium alloy such as a uranium-molybdenum alloy. The method typically includes a series of hot rolling operations on a cast plate material to form a thin sheet. These hot rolling operations are typically performed using a process where each pass reduces the thickness of the plate by a substantially constant percentage. The sheet is typically then annealed and then cooled. The process typically concludes with a series of cold rolling passes where each pass reduces the thickness of the plate by a substantially constant thickness amount to form the foil.

Abstract: A ternary alloy of uranium, referred to as stakalloy, having improved machinability is formed of niobium, vanadium and uranium. The ternary alloy is formed with the percent by weight of vanadium being between the gamma eutectoid (1.0 percent by weight vanadium) and the eutectic (4.5 percent by weight vanadium) compositions, and the niobium content being between 0.01 to 0.95 percent by weight and the balance being uranium. Stakalloy has different density, improved metallurgical properties, such as different hardness, machinability, and ballistic properties from other uranium alloys, making it useful as a structural alloy where high density and high strength are important.

Abstract: Process for smelting a titanium steel according to which a liquid steel containing more than 0.003% of nitrogen and not containing titanium is smelted and then more than 0.005% of titanium is introduced into the liquid steel by progressive diffusion from an oxidized phase containing titanium and the steel is solidified. Steel obtained by the process.

Abstract: Binary alloys of uranium and vanadium having high hardness and strength prepared by selectively adjusting both the composition of the alloy and the solutionization temperature between the gamma-eutectoid and the eutectic points.

Abstract: A method for making uranium-tungsten alloy of high strength comprising raly chilling a molten solution of tungsten in uranium to form a ribbon. Subsequent to pulverizing and consolidation, heating effects a precipitation of tungsten in the uranium to effect significant strengthening. A strengthened uranium with 1/2-5%, by weight of tungsten is particularly useful for KE penetrators.