Abstract: The invention relates to an extrusion process and an extrusion tool for the production of cylindrical metallic or ceramic blanks having one or more internal twisted longitudinal bores. A plasticized, pulverulent starting material, deformable by means of extrusion, is forced through a space formed by a die and a mandrel. One or more twisted central pins of a rigid material are fastened to the mandrel which ends before the inner space of the die. The central pins form the longitudinal bores in the blank. The positioning of the longitudinal bores is extremely symmetrical within the blank and uniformly achieved in the various individual blanks extruded using the same production batch.

Abstract: A process for the manufacture of dispersion-strengthened alloys of the refractory metals of the 4th, 5th and 6th subgroups of the Periodic Table for application in semi-finished products or preformed parts requiring high thermal creep-resistances, involves integrating dispersion-strengthening into the process in 2-4 partial operational steps through thermal reshaping, utilizing only 3-25% strain per partial step. Annealing processes are implemented between the individual reshaping processes at temperatures, which at least during some part of the annealing process, are below the respective recrystallization temperatures of the alloy materials. The maximum deformation of the alloy materials is 75%, but is normally substantially lower. Components manufactured from the materials produced according to the process include tools used in isothermic high-temperature forging or in rotating anode X-ray tubes.

Abstract: Process for producing a ductile, high strength, oxide dispersion hardened sintered alloy based on a metal having a high melting point. In the past, oxide dispersion has played only a minor role in comparison with other known processes for increasing strength. The process disclosed permits cost effective production of metallic materials which possess a strength hitherto unattainable by oxide dispersion and a higher ductility than prior art materials. As a result, the metallic and nonmetallic foreign components in the sintered alloy can be restricted to the relatively small quantities of dispersoids and any dissolved residual oxygen. The process consists in an annealing treatment and calls for a specific choice of basis metal and suitable oxide dispersoid.

Abstract: An actively cooled device, such as a heat shield for a fusion reactor, includes elements (10) of a heat-resistant material, particularly graphite, each being provided with at least one recess having a circular cross section, particularly a groove (14), into which a cooling pipe (16) conducting a coolant is brazed directly and with surface contact. This produces an effective dissipation of heat from the elements and a more durable connection of the elements with the cooling pipe or pipes.

Abstract: The invention relates to a process for the manufacture of a solder joint between a part consisting of pyrolytic graphite and a metal part. According to the invention, the parts are not soldered directly to each other, but by way of an intermediate piece consisting of graphite reinforced with carbon fiber. In the process, pyrolytic graphite and carbon-fiber reinforced graphite are positioned in relation to each other in such a way that the stratification of pyrolytic graphite runs approximately parallel to the place of primary orientation of carbon fibers within the carbon-fiber reinforced graphite.

Abstract: A creep-resistant alloy having a tiered structural arrangement of one or several refractory metals Mo, W, Nb, Ta, V, Cr containing certain doping agents, as well as a process for producing the same. The special doping agents are compounds and/or mixed phases of such compounds selected from the group of oxides, nitrides, carbides, borides, silicates or aluminates having a melting point higher than 1500.degree. C. The size of their grains is .ltoreq.1.5 .mu.m, their proportion in the alloy is comprised between 0.005 and 10% by weight. Unlike in the known state of the art, the use of porassium as doping agent is avoided in this alloy. A good reproducible consolidation and in particular high densities during sintering can thus be obtained. Furthermore, this alloy has better ambient temperature, heat and creep resistance properties than known alloys of refractory metal with a tiered structual arrangement.

Abstract: A parting tool is provided having a tool shank and an interchangeable blade support connected thereto. The blade support is equipped with a blade attachment of blade. The blade support makes contact along one side thereof with a broad-side of the tool shank. The blade support has narrow sides which are guided, at least on sections, by two guide surfaces of the tool shank typically disposed on flanges. Flat contact surfaces on said flanges perpendicularly disposed in relation to the broad side of the tool shank butt against two corresponding counter guide surfaces on said blade support and are pressed against each other by clamping means such as longitudinally off-set screws. In comparison with earlier parting tools used for the same applications, the parting tools of the invention can be made smaller in overall height and provide extremely stable connection between the blade support and the tool shank, thereby greatly reducing rattling and vibrations during normal cutting operations.

Abstract: Rotary graphite anode for use in X-ray tubes comprising a basic body consisting of graphite and a high melting alloy and having a tungsten alloy focal track. The basic body is secured to a graphite substrate. The graphite substrate is coated by a layer of carbon formed by decomposition of hydrocarbon gases in an activated d.c. voltage discharge.

Abstract: The invention relates to a process for the manufacture of multi-layered wear-resistant CVD- or PVD-coatings applied to hardmetal parts containing WC-Co or WC-Ni, where at least one of the layers is a metal-boronitride layer. According to the invention, the boron concentration in the metal-boronitride layer is maintained below the critical level above which in addition a homogeneous boronitride mixed crystal phase a further phase, particularly a diboride phase is formed. A non-boronic, or only slightly boronic, intermediate layer is employed as a diffusion barrier between the hardmetal and the metal-boronitride layer to limit or prevent the formation of brittle tungsten cobalt boron or tungsten nickel boron phases on the external surface of the hardmetal. The metallic boronitride layer can be applied either as a single layer or in multiple layers alternating with other mechanically resistant layers. The hardmetal part is particularly a cutting insert for machining.

Abstract: Rotary anodes for X-ray tubes are provided having improved thermal stability. The rotary anodes are comprised of a basic body made of molybdenum alloy comprising about 0.1 to 15% by weight hafnium, about 0.1 to 15% by weight zirconium, about 0.01 to 1.0% by weight carbon and the balance molybdenum.The alloy according to the invention has a low tendency of cracking distortion, and/or surface roughening, even with focal track zones made of tungsten and tungsten alloys and even at operating temperatures exceeding the currently normal values by up to about 200.degree. C.

Abstract: A method is provided for making a composite substrate for electronic semiconductor parts. The composite substrate has a metal core, an insulating layer, and a conducting layer. The insulating layer is deposited by chemical vapor deposition in the gaseous phase on the metal core, or by chemical vapor deposition in combination with other techniques, such as plasmaspraying and/or melting. The metal core is comprised of a highly heat-resistant refractory metal, e.g., molybdenum, tungsten, titanium, molybdenum-manganese alloy, or a high-alloy steel having a permeability of about 1.002. The insulating layer is comprised of an inorganic material such as aluminum oxide or aluminum nitride. The conducting layer typically comprises copper.

Abstract: A process for forming a metallic sputter target and a metallic sputter target product are provided. The process provides a dense homogenious bulk material of high strength comprising ductile metal components which forms a brittle composition when alloying. The process employs a mixture of individual components at least one of which being ductile at room temperatures. The individual components can be all metals, or a mixture of metals and non-metals. The individual components are formed into a powder mixture in a first step. Unlike hot pressing or other melting techniques which can cause ductile components to alloy into brittle materials, the powder mixture is cold pressed to form a shaped body which is thereafter densified by repeated working at temperatures below the lowest of the melting points of the individual components. This treatment occurs under conditions of material flow and cold welding.

Abstract: Sputter targets and a process for producing sputter targets are provided, comprised of carbides and/or nitrides and/or borides of refractory metals. In a first step, a dense composite body is produced comprised of one or more carbides and/or nitrides and/or borides of the metals of Groups IV A-VI A of the periodic table and a metallic binding agent comprised of one or more metals of the iron group of the periodic table. This composite body in the form of a shaped blank is machined, if necessary, and the binding agent is removed by chemical or electrochemical treatment. The sputter target as so produced has excellent mechanical strength and high thermal shock resistance. Levels of contaminating elements and the residual metallic binding agent are extremely low, meeting the requirements typically placed on sputter targets.

Abstract: The invention relates to a process for producing a superconducting wire, using, e.g., Chevrel phases as superconductors, in particular PbMo.sub.6 S.sub.8. Until now, it was not possible to produce superconducting wires from such materials in a technically usable quality. According to the process of the invention, the superconducting Chevrel phase is loaded vacuum-tight into a molybdenum shell and the unit is advantageously sealed in another jacket made of steel. The powdery superconducting phase has an average grain size of less than 1 .mu.m. For shaping the superconducting wire, the unit is extruded in a first process step at temperatures between 1000.degree. and 1600.degree. C. and reduced in cross section in excess of 1:10, and subsequently further treated in a plurality of process steps by additional extruding and/or hot drawing.

Abstract: There is disclosed a curved intramedullary lower leg spike in which the face over which cooperates with a driving tool is disposed at an angle with respect to the longitudinal axis of the spike and in which the face area and the front plane of the spike define a divided frontal surface at the leading end of the spike and form an acute angle with the longitudinal axis thereof.

Abstract: There is disclosed a rotating anode for use in X-ray tubes having a basic member made of a carbonaceous molybdenum alloy, such as TZM, and a focal path, that is a cathode path, of tungsten or a tungsten alloy, the surface of the basic member outside the focal path being coated at least partially with one or more oxides or a mixture of one or more metals and one or more oxides and having a 10 to 200 .mu.m thick layer of molybdenum and/or tungsten disposed between the surface of the basic member and the coating thereon of oxides or mixture of metal and oxides.

Abstract: A cutting tool having improved chip runoff over a wide range of cutting conditions is provided. The cutting tool improves chip deformation and reduces cutting forces, resulting in the generation of lower temperatures and increased service life. The tool has at least two notches near a cutting corner which are positioned at an angle with respect to a cutting edge. As notches are positioned farther from the cutting corner the angle increases and the notches are spread farther apart. The arrangement reduces cutting forces even for larger feeds. In addition, the notches are provided with two opposite sides which differ in vertical slope, the side farther from the corner having the greater slope to again facilitate chip deformation and reduce friction.

Abstract: There is provided a medullary nail having a hollow body provided with a plurality of longitudinal concave zones (3) in the outer surface and contiguous zones of annular form (2) and having a cutter (4) at one end. The body is of tantalum, an alloy thereof containing more than 50% tantalum, niobium, or an alloy thereof containing more than 50% niobium and is provided with a female thread (1) at the end opposite the cutter (4) and is anodically oxidized and the wall thickness is approximately the same over the entire length.There is also provided a process for making the nail by rolling a sintered body of tantalum or niobium to form a sheet which is then shaped into a slotted tubular form and welded and then rolling, forging or pressing to form the concave zones (3) or making the tubular form by extruding it from sheet of sintered body material and then proceeding as above stated.

Abstract: There is disclosed an improved cutting tool having a body provided with a threaded borehole, a clamping bolt and a recess, and which is provided with a supporting surface and at least one lateral supporting surface for supporting an indexable cutting insert. The insert is provided with a center hole for receiving the clamping bolt which has a rotationally symmetrical shaped portion for engaging the center hole thereof. The upper end of the clamping bolt has the form approximately of a clipped ball and the lower end is screwable into the threaded borehole of the tool body with the center portion thereof supported on the tool body; the borehole of the tool body being provided with two coaxial upper and lower cylindrical sections of different diameters extending perpendicular to the surface supporting the cutting insert.

Abstract: A metallic device for the insertion and extraction of medullary nails having a guide tube (1) which is comprised of two successive longitudinal sections (2 and 3). Striking elements (7 and 11) are disposed on opposite ends of the tube and a displaceable strike bushing (6) is located on the tube between the striking elements.