Abstract: A powder metallurgical process for producing a wrought product characterized by a low level of residual impurities. The process comprises the steps of: comminuting metal powder to effect a reduction in particle size, at least 60% of the comminuted particles being capable of passing through a -270 mesh Tyler screen; blending the metal powder with a softer metal-bearing powder; heating the blended powder particles at an elevated temperature, the particles adhering and forming a mass during heating; crushing the mass of powder particles; cold-isostatically pressing the crushed mass of powder; sintering the powder in the absence of an encapsulating member under conditions which effect a reduction in the nitrogen, oxygen and carbon levels of the powder; and hot working the sintered powder into a wrought product. The wrought product has less than 0.015% carbon.

Abstract: A clad steel pipe excellent in corrosion resistance and low-temperature toughness, which comprises a cladding sheet of high corrosion resistant steel and a substrate sheet of low-alloy high-strength steel, the substrate sheet consisting, as the fundamental constituents, essentially of:carbon: from 0.002 to 0.050 wt. %,silicon: from 0.05 to 0.80 wt. %,manganese: from 0.80 to 2.20 wt. %,niobium: from 0.01 to 0.10 wt. %,aluminum: from 0.01 to 0.08 wt. %,nitrogen: from 0.002 to 0.008 wt. %, and,the balance being iron and incidental impurities;or, the substrate sheet further additionally containing, as the strength-improving constituents, at least one element selected from the group consisting of:copper: from 0.05 to 1.00 wt. %,nickel: from 0.05 to 3.00 wt. %,chromium: from 0.05 to 1.00 wt. %,molybdenum: from 0.03 to 0.80 wt. %,vanadium: from 0.01 to 0.10 wt. %, and,boron: from 0.0003 to 0.0030 wt.

Abstract: A process for manufacturing a hot extruded product from a continuously cast stainless steel or super alloy billet comprises cold working the surface of the billet, heating the billet to extrude it and at the same time to provide a fine recrystallized structure in its surface layer, and hot extruding the billet.

Abstract: An improved guide for cutting-off and/or bevelling pipe with a torch using a ring-shaped member with circular guide-surfaces fixed around the pipe, includes the ring-shaped member circumference forming axially spaced first and second rim-and-ledge tracks engaged respectively by wheels of frame-mounted outer bogies; inner bogies positioned for running on the inner surface of the ring mount to the outer bogies resiliently to accommodate irregularities in the tracks; the frame has first and second ends for holding torch-carrying depth-adjustment mechanisms with the torch respectively at 37 degrees to the axis of the work and at 90 degrees to the axis of the work, as selected; provisions permitting rotation of the torch about the flame axis and quick attachment-detachment of the torch are disclosed.

Abstract: In a two tube cutting torch having a torch head and a body with a first cutting oxygen tube supplying oxygen from the body to the head and a second preheat tube supplying oxygen and fuel from the body to the head in which the body has a fuel inlet and an oxygen inlet and control means connected to the body for controlling the flow of fuel and oxygen, the improvement of a head mixer and thermal conductor. A member is connected between the preheat tube and the head and the member includes a straight through bore interconnecting the preheat tube and the head and the bore at the tube end is in communication with oxygen in the preheat tube. The member also includes one or more passageways extending from the tube end and is in communication with fuel in the preheat tube. The member includes one or more holes adjacent the head end extending from the bore to the passageways for aspirating fuel from the passageways into the bore and mixing in the head as oxygen flows through the bore to the head.

Abstract: A process is provided for producing salt-coated spheroidal granules of magnesium by employing a molten flux bath comprised of a salt composition of NaCl, KCl and CaCl.sub.2 maintained at a temperature in excess of the melting point of magnesium to which is added magnesium metal. A magnesium oxide dispersing agent is maintained in said bath in an amount sufficient for dispersing said magnesium. The bath mixture is subjected to high energy stirring sufficient to disperse the magnesium metal throughout the bath as beads. The bath mixture is then rapidly chilled to form a friable mass of the salt composition with spheroidal granules of magnesium dispersed through the salt matrix. The friable mass is then comminuted under conditions to release the magnesium from the salt as salt-coated spheroids which are thereafter recovered.

Abstract: A pressable and sinterable metal carbide grade powder consists essentially of a uniform mixture of a refractory metal carbide powder, a metal binder powder, and from about 0.5 to about 5 percent by weight of an organic amide having a melting point greater than about 120 degrees centigrade.

Abstract: Molten metals having a low vapor pressure, such as aluminum, are vacuum refined to remove metallic impurities employing a lifting gas to form a metal fall above a liquid metal surface; a vacuum above the metal surface is effective in conjunction with the lifting gas, to develop a bulk flow of rising gases between the liquid metal surface and a condenser; the pressure is higher, i.e. lower effective vacuum, than that which would cause such bulk flow in the absence of the lifting gas; a molten metal such as copper may be vacuum refined by creating a vacuum effective to cause emission from the liquid copper surface of the metallic impurities as a bulk flow of rising gases, in particular lifting the liquid copper from a lower level to at least the metal surface creates a circulation within the mass of copper effective to promote transfer of metallic impurities to the metal surface.

Abstract: A radius attachment is provided for use with a conventional welding or cutting torch carriage incorporating a segment of the guide rail carrying a drive means and balancing means, the drive means being driven by the drive of the torch carriage and a connection from the guide rail segment to a pivot point adjustably controlling the radius of rotation.

Abstract: A steering apparatus for an autogenous cutting torch for cutting holes of desired shape in flat or curved sheet walls, such as in the wall of a pipe. The steering apparatus comprises a holder arm for an autogenous cutting torch and means for guiding the holder arm in a manner that the autogenous cutting torch can be run along a certain desired orbit or path. A problem with the prior art steering equipment is the limited scope of application, e.g. to the cutting of flat sheets only. In order to expand the scope of application to also cover curved surfaces as well as combinations of flat and curved surfaces, the holder arm is designed as a long rod (4), arranged to be axially displaceable on a slide guide (7).

Abstract: A combination cutting torch and nozzle assembly for post-mix oxy-fuel gas cutting using two separate annular steams of preheat oxygen gas surrounding the fuel gas stream with the inner annular oxygen stream directed to impinge the fuel gas stream very close to the point of discharge from the nozzle assembly. The nozzle assembly is secured to the torch head of the cutting torch by a hollow retaining nut which forms an annular gap with the nozzle assembly for discharging the outer preheat oxygen gas stream.

Abstract: At least one water table adapted for use with a burning machine in combination with a conveyor to remove slag from the water table. The water table has an open top water tank with a dump frame located at the top and burning bars supported on the dump frame to form a metal cutting table. The dump frame may be tilted relative to the water tank and the level of water in the water tank may be varied. The conveyor has an open top trough adjacent to the water table and a conveyor extends substantially throughout the length of the trough to receive slag from the dump frame when the dump frame is tilted. A cover is located at the top of the trough and is pivotally attached to the dump frame on the water table so that it may be tilted. A seal is carried on the exterior of the cover and extends between the cover and the trough to prevent water from passing into the trough when the water level in the water tank is raised to cut metal supported on the burning bars.

Abstract: Using a heat resistant austenitic nickel based alloy, independent of the grain size in the initial material, a fine-grained finished part is produced from an unworked part which was not specially cultivated for fine grain, in a single operational step, consisting of isothermal forging.

Abstract: In a process for producing fine size cobalt metal powder from scrap material containing brazing compositions, the silver ions are removed by cementation with iron to form an insoluble mixture which is subsequently treated with concentrated hydrochloric acid to solubilize the silver which is then precipitated as silver chloride.

Abstract: A flame cutting rollerbed which is specifically intended for use in metal strand casting plants serves to cut metal strands longitudinally and/or transversely. A flame cutting rollerbed of this type comprises uniformly spaced support rollers which are arranged across the longitudinal motion direction of the cast strands. The support rollers are each equipped with spaced disk rollers on the edges of which the metal strands contact and are supported.In order to protect the stationary support rollers from being damaged by the flame cutting jet, it is proposed that sections between adjacent disk rollers be coated with a porous protective coating which is resistant to the heat flow of the flame cutter jet. The protective coating is either metal-porous or ceramic-porous. Furthermore, the coating may be cooled by a cooling fluid, in which case the porous protective coating forms storage spaces for the cooling fluid. Nozzles for the cooling fluid are arranged opposite the disk rollers and/or the support rollers.

Abstract: A method and apparatus for providing a smooth radius on an edge of a sheared metal sheet are disclosed. The apparatus includes a heating element, such as an oxy-acetylene torch, and a supporting frame incorporating means for translating said sheared edge in predetermined relationship with said heating element. The method encompasses the steps of causing relative translation between a heating element and the previously sheared edge of a metal sheet to accomplish the reduction of said edge to a smooth radius.

Abstract: A method of controlling an operation of a copycutting apparatus including a tracer for tracing automatically a pattern and a cutting gas torch interconnected to the tracer in a given relationship. Prior to the actual working, the tracer is manually moved with respect to the pattern along a given path and stores coordinates of operational points such as a piercing point, a copy start point, a copy end point, an intermediate point, a slow down point, etc. During the actual working the stored coordinates are readout to control the movement of the tracer in such a manner that until the tracer does not reach a copy start point the copying apparatus is set in a position setting mode in which the tracer is moved under the control of the readout coordinates. After the tracer has reached the copy start point the copying apparatus is switched into a copying mode in which the movement of tracer along the pattern is controlled by detecting the pattern.

Abstract: An autogenous portable apparatus is described for welding and oxygen cutting operations which uses a combustible gas fuel and oxygen derived from the decomposition of hydrogen peroxide flowing through a catalyst of lead chips. The catalyst is positioned to allow priming by initial quantities of hydrogen peroxide to be injected into the catalyst by the action of gravity. Once oxygen is formed the pressures thereof are fed back to the container holding the hydrogen peroxide thereby pressurizing the same and cause increasing quantities of oxygen to be produced until the desired level has been reached. Condensers are provided to condense the water vapor also formed in the conversion process to purify the oxygen prior to use thereof at a welding torch. A fluid control valve regulates the flow of the hydrogen peroxide at a rate inversely to the pressure of the oxygen to thereby maintain the pressure below a maximum predetermined value.

Abstract: A method of controlling the operation of a copying apparatus which includes a tracer for tracing automatically a contour of a pattern to be copied and a working machine arranged in conjunction with the tracer in a given relationship is disclosed. At first, the tracer is moved manually with respect to the pattern to be traced to detect point data such as a working start point, a copy start point and a copy end point, and then automatically moved along the contour of the pattern to detect pattern data, while the working operation is performed. Next, the thus detected point and pattern data are stored in a cassette tape. Therefore, in case of performing the repetitive working operation for the same pattern, since the working operation can be performed in accordance with the data read out of the cassette tape, the required working operation can be effected in a simple and rapid manner.

Abstract: Fine mesh metal powder, such at titanium powder, is prepared by reaction of a halide of the metal, in vapor form, with a fine spray of molten sodium at a temperature below the melting point of the metal.