Abstract: Cutting head usable equally well with "head mixed" blowtorches (1) as with "premixed" ones, comprising a male part (6) and a female part (7), and characterized in that:(a) the end of the male part in contact with the blowtorch has a flange (20) the diameter of which is less than that of the chamber (5) into which open conduits (3 and 4) for the heating oxygen and gas of a "head mixed" torch, or the conduit for the heating mixture of a "premixed" torch, and which is crossed by at least two diametrically opposed holes (21);(b) between the male part and the female part is provided an annular passage (22) for the heating oxygen/gas mixture; and(c) in communication with the holes (21) are hollows (21a) provided in the lower protruding part of the flange, or assemblies provided in the female part, which make possible the aspiration of gas, said hollows or assemblies being in communication with the annular passage (22).

Abstract: An improved process is provided for producing mechanically alloyed powders of simple and complex alloy systems. In the improved process, the mechanically alloyed powder is milled to an acceptable processing level in a gravity-dependent ball mill to obtain a powder characterized by a laminate-type microstructure which is substantially optically homogeneous at a magnification of 100.times.. Such acceptable processing level is reached without processing the powder to a featureless microstructure or to saturation hardness.

Abstract: Helical coil springs for use in such active load supporting functions as railway car trucks, require end forming such that tapered ends are provided which fit flat against the surfaces to be resiliently supported. A process and an apparatus for forming such spring ends by flame cutting is provided.

Abstract: An inspection track is scarfed by moving a burner across a flat surface of a steel slab, particularly a slab of ductile steel of deep-drawing quality, to enable sub-surface inspection of the slab. To achieve accurate control of the depth of the track, the burner is mounted on a burner carriage having at least one skid surface which contacts the slab surface of the slab at an unscarfed region thereof. A guide track is spaced from the slab surface and the carriage is moved with said skid making sliding contact with the slab surface while guided by said guide track. The skid surface makes substantial contact pressure with the slab surface so that scale on the slab surface is pushed aside and/or crushed by the skid surface, whereby the burner is maintained at a substantially constant distance from the slab surface.

Abstract: A process and apparatus for absorbing and exhausting efficiently dust (oxide particles), fumes, smoke, harmful gases and the like generated by plasma-arc cutting. The lower space of a fixed board for supporting the material which is cut is divided by plural partition plates to the direction crossing at right angles with the driving direction of the cutting machine body, an absorbing hood connected with a dust collector through a duct is installed and fixed to the cutting machine body in order to exhaust from the side of partition space corresponding to the plasma-arc cutting torch, fumes in each partition space at every position of cutting at the shortest distance and efficiently by making the absorbing hood move together with the movement of the cutting machine body. A reduction of the dust collector's capacity and a simplification of the accessory equipment are possible and cost reduction of the equipment for exhausting smoke including dust, fumes and the like in the plasma-arc cutting machine is possible.

Abstract: Apparatus for cutting a pipe tube turn has a frame that may be fixed on the pipe and mounts a cutting torch for movement orbitally of the tube turn's longitudinal axis and in a plane that is at right angles to such axis. The cutting torch is stabilized and guided during its movements by two sets of followers which straddle the torch and engage the tube turn's surface. Each set of followers has a pair of rollers journaled in a common axis and straddling the cut made by the torch.

Abstract: Method and apparatus for automated cutting of metal plates in which fuel and oxygen adjustments, as well as other parameters are controlled automatically responsive to temperature sensed at a plurality of points near where the cut is being made; for example, at the front shoulder of the kerf at the surface and behind the tip down in the kerf. Also disclosed are specific preferred embodiments, including the use of microprocessor, algorithms, programs and temperature sensor locations and connections.

Abstract: Acicular ferromagnetic metal particles consisting essentially of iron are prepared by a process wherein acicular iron(III) oxide hydroxide provided with a shape-stabilizing surface coating, or iron(III) oxide obtained therefrom by dehydration, is reduced by means of a decomposable organic compound and hydrogen.

Abstract: A metal processing system wherein a material removing means such as a shear blade is operative in conjunction with the transverse cutting action of a torch for removing from the cut line produced by the torch residual material resulting from the cutting action of the torch in a manner that the residual material is removed progressively along the transverse cut line in coordinated following relationship to the producing of the transverse cut line by the torch.

Abstract: An exothermic cutting electrode or burning bar having an oxidizable metal fluid conduit (tube) surrounded by a mass of metal similar to that of the fluid tube, the entire structure covered with an outer oxidizable metallic tube and/or an electrically insulating water impervious cover, either end of the electrode being adapted for connection to a source of oxidizing fluid and electric current, so that, an arc can be struck between a workpiece and the free end of the electrode to produce a cutting flame. By proper selection of the type and mass of the materials of construction the electrode will burn after the electric current has been turned off.

Abstract: Acicular ferromagnetic alloy particles doped with silicon, chromium and nickel and optionally magnesium and a process for producing said particles comprising heating at 300.degree. to 500.degree. C. under reducing atmosphere acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium or acicular particles of .alpha.-ferric oxide doped with silicon, chromium and nickel and optionally magnesium obtained by dehydrating the acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium are disclosed herein.

Abstract: A ferromagnetic powder and process for producing it are disclosed. The process involves providing reducing a nickel-doped or nickel-coated iron compound in a reducing gas to provide a reduced metal powder including nickel in an amount of 3 to 30 atomic % based on the atomic % of iron present in the reduced metal powder, and treating the reduced metal powder with an organic metal powder. The resulting ferromagnetic metal powder has excellent stability with respect to oxidation and has a high saturation magnetization.

Abstract: Disclosed is a thermal mechanical treatment for improving the high temperature properties of cast austenitic heat resistant chromium-containing alloy steel structures which method comprises (a) heating the structures to at least the temperature at which chromium carbides go into solution, but below the temperature where incipient melting occurs; (b) maintaining the structures at such a temperature long enough so that at least 50% of the chromium carbides go into solution; (c) applying from about 15% to 60% plastic deformation by hot forming operations; and (d) cooling the structures to room temperature at such a rate to allow complete recrystallization of the grains to occur.

Abstract: A metal machining device includes a pair of longitudinally movable gantries and a connecting transverse bridge which mounts carriages which carry machining tools. A computer numerical control unit is fixedly mounted adjacent one end of the bridge and is connected to supplemental electronic circuits. The transverse tool-carrying bridge is formed as a generally hollow heavy-walled closed box-beam which has mounted therein at least part of the supplemental electronic circuitry. A beam side-wall is provided with a plurality of doors which open to permit access to a plurality of circuit-holding drawers. When the doors are closed, the bridge forms a unitary hollow housing containing the supplemental electronic circuitry which serves to mechanically and electronically isolate them and substantially reduce the radiation of electronic noise therefrom to the computer.

Abstract: Improved compositions of the type using metal flake in resin binders. The distribution of the flakes can be much enhanced using relatively small quantities of an ultra-thin, non-planar metal flake. Enhanced electroconductivity is a particular advantage of the invention.

Abstract: This invention relates to liquid metal fast breeder reactor and steam generator precipitation hardening fully ferritic alloy components which have a microstructure substantially free of the primary precipitation hardening phase while having cells or arrays of dislocations of varying population densities. It also relates to the process by which these components are produced, which entails solution treating the alloy followed by a final cold working step. In this condition, the first significant precipitation hardening of the component occurs during high temperature use.

Abstract: A device for cutting circular piece parts of various diameters comprising a shaft having a central axis and a cutting element mounted on a rack at a random radius from the axis. The rack supports the cutting element for changing the position of the cutting element relative to the axis to effectively change the radius and thus the diameter of the circular piece part. The method includes mounting the shaft at a point corresponding to the center of the piece part and fixing a cutting element to the rack. The cutting element is positioned relative to the work piece to perform a cutting operation. When the rack is rotated about the shaft and the point, the attached cutting element also rotates about the point during the cutting operation to develop the circular piece part.

Abstract: A process for removing residual and tramp elements including absorbed, adsorbed or otherwise occluded gases from metal powders is disclosed. The process includes sequentially subjecting the metal powder to the melting and boiling points of the residual elements to be removed while in a vacuum atmosphere. In the case of some gases, the process includes cryogenic cooling near absolute zero temperatures.

Abstract: An adaptor for interconnecting a three outlet cutting torch head with a two inlet cutting tip. When installed, the adaptor provides a cavity for mixing combustible gas with heating oxygen. The configuration of the cavity and associated passageways minimizes the possibility of flame blowback into the head.

Abstract: Stainless steel suitable for use as water turbine elements for water power plants having high cavitation erosion resistance, comprised of at least one of either carbon of no more than 0.2 weight percent or nitrogen of 0.02-0.3 weight percent, together with silicon of 2.0 weight percent or less, chromium of 10.0-20.0 weight percent, nickel of 0.5-10.0 weight percent, manganese of over 2.0-20.0 weight percent, and the balance of essentially iron, and in which the ferrite phase has not been formed but where at least either the epsilon phase or the austenite phase has been essentially formed.