The present invention relates to a method for obtaining a solid blade of a turbomachine, comprising a core, a tip and a root, the method comprising: a step of producing a blank from at least two parts (50, 51), at least one of which is a solid part, the at least two parts being assembled by a diffusions connection technique and without melting, anda step of machining this blank in order to produce a blade with a defined profile.

The present disclosure provides methods for preparing an extruded product from a solid billet. The methods can include providing an as-cast billet for extrusion; applying a simultaneous rotational shear and axial extrusion force to the as-cast billet to plasticize the as-cast billet; and extruding the plasticized as-cast billet with an extrusion die to form an extruded product. Methods for preparing extruded products from billets can also include: providing a billet for extrusion; while maintaining a majority of the billet below 100? C., applying a simultaneous rotational shear and axial extrusion force to one end of the billet to plasticize the one end of the billet; and extruding the plasticized one end of the billet with an extrusion die to form an extruded product. Methods for preparing an extruded product from a billet can also include providing a billet for extrusion; applying a simultaneous rotational shear and axial extrusion force to the billet to plasticize the billet; extruding the plasticized billet with an extrusion die to form an extruded product; and artificially aging the extruded product for less than the ASTM recommended amount of time.

Methods of applying aluminum coating layers over copper wires are disclosed. A first method may include applying aluminum powder to the surface of a rod, passing the rod through a first set of compression rolls thereby forcing the aluminum powder into a compacted preform around the rod, and heating the rod covered by the preform at 550 C. to 620 C. Further, the heated preform coated rod is passed through a second set of compression rolls thereby obtaining an aluminum coated copper rod. A second method includes disposing a copper rod inside an aluminum tube having an inner layer formed of brazing aluminum alloy, reducing the diameter of the tube's inner surface to match the copper rod, and heating the composite tube-rod such that the inner layer of the brazing alloy fuses to the rod. Another method includes passing the copper rod through a spray of metallic aluminum.

A method of producing a nickel alloy clad steel pipe including: providing a hollow cylinder of nickel alloy cladding material and a hollow cylinder of steel, placing the hollow cylinder of the nickel alloy cladding material concentrically inside the hollow cylinder of steel or the hollow cylinder of the steel concentrically inside the hollow cylinder of nickel alloy cladding material to form a composite billet, heating the composite billet to 1121-1260 C., and extruding the composite billet, wherein the nickel alloy cladding material comprises 6.0-12.0 wt. % molybdenum, 19.0-27.0 wt. % chromium, 1.0 wt. % maximum tungsten, 0.6 wt. % maximum aluminum, 0.6 wt. % maximum titanium, 0.001-0.05 wt. % carbon, 0.001-0.035 wt. % nitrogen, 0.001-0.3 wt. % silicon, 1.0 wt. % maximum niobium, 2.5 wt. % maximum iron, 0.5 wt. % maximum manganese, 0.015 wt. % maximum phosphorous, 0.015 wt. % maximum sulfur, 1.0 wt. % maximum cobalt, and the balance nickel and may have a solidus temperature greater than 1312 C.

Methods of applying aluminum coating layers over copper wires are disclosed. A first method may include applying aluminum powder to the surface of a rod, passing the rod through a first set of compression rolls thereby forcing the aluminum powder into a compacted preform around the rod, and heating the rod covered by the preform at 550 C. to 620 C. Further, the heated preform coated rod is passed through a second set of compression rolls thereby obtaining an aluminum coated copper rod. A second method includes disposing a copper rod inside an aluminum tube having an inner layer formed of brazing aluminum alloy, reducing the diameter of the tube's inner surface to match the copper rod, and heating the composite tube-rod such that the inner layer of the brazing alloy fuses to the rod. Another method includes passing the copper rod through a spray of metallic aluminum.

A device for solid state joining of light metals like aluminum is described. The device utilizes the principle of continuous extrusion to add a string of filler metal into a groove separating the components to be joined, and shear deformation for surface oxide removal in the groove. The device comprises a rotating drive spindle (13) terminated in a drive spindle head (14). A groove with the shape of a circular arc constituting an extrusion chamber (16) is machined in the outer surface (15) of the drive spindle head (14), the extrusion chamber (16) being limited radially outwards by a stationary annular metal shoe (17) surrounding the drive spindle head (14), the extrusion chamber (16) being terminated by an integrated (fixed) or replaceable abutment member (18) for diverting aluminum from its circular movement in the extrusion chamber (16) through a die orifice (19).

Methods of applying aluminum coating layers over copper wires are disclosed. A first method may include applying aluminum powder to the surface of a rod, passing the rod through a first set of compression rolls thereby forcing the aluminum powder into a compacted preform around the rod, and heating the rod covered by the preform at 550 C. to 620 C. Further, the heated preform coated rod is passed through a second set of compression rolls thereby obtaining an aluminum coated copper rod. A second method includes disposing a copper rod inside an aluminum tube having an inner layer formed of brazing aluminum alloy, reducing the diameter of the tube's inner surface to match the copper rod, and heating the composite tube-rod such that the inner layer of the brazing alloy fuses to the rod. Another method includes passing the copper rod through a spray of metallic aluminum.

Methods of applying aluminum coating layers over copper wires are disclosed. A first method may include applying aluminum powder to the surface of a rod, passing the rod through a first set of compression rolls thereby forcing the aluminum powder into a compacted preform around the rod, and heating the rod covered by the preform at 550 C. to 620 C. Further, the heated preform coated rod is passed through a second set of compression rolls thereby obtaining an aluminum coated copper rod. A second method includes disposing a copper rod inside an aluminum tube having an inner layer formed of brazing aluminum alloy, reducing the diameter of the tube's inner surface to match the copper rod, and heating the composite tube-rod such that the inner layer of the brazing alloy fuses to the rod. Another method includes passing the copper rod through a spray of metallic aluminum.

A copper alloy bonded body composed of a plurality of members made of an age-hardenable copper alloy, the members diffusion-bonded to one another. The copper alloy bonded body has undergone solution annealing and an aging treatment, the content of beryllium in the age-hardenable copper alloy is 0.7% by weight or less, and (i) a bonding interface between the members has disappeared and/or (ii) a bonding interface between the members remains, and an oxide film at the bonding interface has a thickness of 0 nm or more and 5.0 nm or less.

Provided is a neodymium-iron-boron magnet and preparation method thereof. The preparation method includes the following steps: preparing a Fe.sub.aG.sub.b metal sheet, covering the Fe.sub.aG.sub.b metal sheet with a rare earth compound Re.sub.xM.sub.yB.sub.z layer, performing multi-layer stacking on the metal sheet covered with the rare earth compound Re.sub.xM.sub.yB.sub.z layer, and then performing high-temperature diffusion under an extrusion force with certain strength, so as to prepare a neodymium-iron-boron magnet.