Abstract:
A method is described for joining first and second surfaces by depositing a layer of metal on the first surface, preparing the second surface to expose fresh metal, placing the deposited metal and the exposed metal in contact, and applying sufficient pressure to join the surfaces, all done in a protective environment, such as vacuum. Also described is a related apparatus comprising an evacuable chamber, an electron-beam heated vapor source, and a pair of rollers for contacting and applying pressure to join the surfaces.
Abstract:
A laminate tube structure produced by stretch reducing, in combination, a pair of tubes. The resultant tube structure is particularly adapted for use as a mandrel for supporting a piercing point of a seamless-tube mill.
Abstract:
Bearings may be formed by a composite material consisting of a sheet of steel lined with a bearing material. The lining process is performed by rotating a steel cylinder internally lined with a bearing metal, applying pressure by means of a roll of relatively small diameter upon the outer surface and applying pressure by means of a roll of relatively large diameter upon the inner surface of the cylinder while rotating the same, and cutting the cylinder open upon completion of the rolling process.
Abstract:
Conversion-rolled titanium/steel bonded composite products having improved mechanical properties desirable for vessel construction are made by heating to 1,400*-1,600*F. a substantially flat metallurgically bonded titanium/steel composite of the character of composites made by explosion bonding, preferably according to the bonding process described in U.S. Pat. No. 3,397,444; commencing rolling of the composite at said temperature and continuing rolling until the thickness is no greater than one-eighth, preferably one-tenth, the prerolling thickness, the composite being roller biaxially, and the time the composite is held at 1,400*-1,600*F. not exceeding 6 hours; and heating the rolled product at 1,200*-1,300*F. for a period of at least about one-half hour.
Abstract:
Articles, including such gas turbine engine hardware as airfoils and discs, are formed by forging alloys in a temporary condition of low strength and high ductility around suitable supporting materials or shapes, and forming a composite by diffusion bonding. The supporting materials may be retained within the finished article to provide, for example, a filament strengthened composite or may subsequently be leached therefrom to form hollow hardware.
Abstract:
A TRANSITION INSERT PIECE SUITABLE FOR THE FUSION WELDING OF ALUMINUM TO STEEL COMPRISING A STEEL ELEMENT AND A STRONG ALUMINUM ALLOY ELEMENT PRESSURE BONDED TOGETHER THROUGH A HIGHLY DEFORMABLE ALUMINUM BONDING LAYER.
Abstract:
A device for the continuous longitudinal seam welding of tubes particularly by electron beam welding, includes a pair of opposed rollers arranged with their mating groove portions in opposition on a bracket which may be rotated so as to shift the rollers in transverse directions. The arrangement includes means for scanning the strip edges of a sheet material which is fed and formed into the form of a slotted tube and adjusting the edges so that the tube is fed between the rollers with the longitudinal groove or slot centered therebetween. The scanning elements are arranged along the strip edges to be welded and actuate a control for a motor which is employed for shifting the grooved rollers with the tube in order to control the position of the weld seam for the purpose of centering the seam in respect to the electron beam. In a preferred arrangement the workpiece is guided by pressure rolls arranged on respective opposite sides of the workpiece which are advantageously carried on a rocker arm so that they may be jointly pivoted about the axis of the workpiece. A second pressure roll pair for guiding the workpiece is advantageously arranged on the rocker arm at a location between the contactless scanning device and the welding pressure roll pair. The second pressure roll pair forces the two band edges of the sheet to be formed firmly together and firmly grips the workpiece running therebetween in the same manner as the welding pressure roll pair.
Abstract:
A novel composite edgelay material has a thin strip of a first metal secured to an edge of a strip of another base metal. The thin metal strip extends along the edge of the base metal strip as an edgelay and is preferably coextensive with the edge surface of the base metal strip. However, the edgelay strip is secured to the base metal edge surface only along a thin stripe which is of a width less than the width of the base metal edge surface. This novel composite material is made in a novel method in which a metal wire or rod is disposed with a thin stripe extending along the wire or rod periphery in engagement with the edge surface of the base metal strip. The wire or rod is then resistance welded to the base metal edge and, preferably, is deformed to a different cross-sectional configuration such as a rectangular cross-sectional configuration coextensive with the base metal strip edge surface.
Abstract:
THIS APPLICATION PERTAINS TO NEW AND IMPROVED METAL COMPOSITE ASSEMBLIES FOR PACK ROLLING INTO COMPOSITE ARTICLES AND NEW AND IMPROVED POWDERED-METAL COMPACTED ARTICLES AND TO METHODS FOR PRODUCING ARTICLES OF THESE TYPES, AND MORE PARTICULARLY TO NEW AND IMPROVED METHODS FOR PRODUCING AND MAINTAINING CLEAN METAL SURFACES AND IMPROVING BONDING DURING MANUFACTURE OF THE ARTICLES. D R A W I N G
Abstract:
This invention relates to composite metal article and method for making the same wherein tantalum metal is applied to the surface of niobium metal and the two metals are diffusion bonded in a protective environment. The bonded metals may be cold worked to produce the final fabricated article.