Abstract: In an aspect, a method of manufacturing a high purity copper-based alloy comprises providing in a melting furnace a feedstock and melting the feedstock. The method additionally includes bubbling an inert gas into the molten copper-based alloy to form the high purity copper-based alloy. Aspects are also directed to an apparatus and a method of fabricating an apparatus for manufacturing the high purity copper-based alloy.

Abstract: Exemplary alloys may be particularly suited for additive manufacturing applications, and may comprise iron and one or more of: chromium (Cr), nickel (Ni), carbon (C), and copper (Cu). Exemplary alloys may have a majority microstructure that is martensite.

Abstract: A titanium aluminide alloy material for hot forging has a chemical composition including, by atom, aluminum of 38.0% or greater and 39.9% or less, niobium of 3.0% or greater and 5.0% or less, vanadium of 3.0% or greater and 4.0% or less, carbon of 0.05% or greater and 0.15% or less, and titanium and an inevitable impurity as a residue.

Abstract: The present invention provides magnesium or magnesium alloys having high formability at room temperature, the magnesium or magnesium alloys having a grain size ?2 microns. The present invention also provides a method for manufacturing the magnesium or magnesium alloys having high formability at room temperature. The magnesium or magnesium alloys having high formability at room temperature are prepared by simple processing means. The present invention overcomes a problem of poor formability at room temperature.

Abstract: The present invention relates to a high-strength, high-corrosion resistance ternary magnesium alloy and a preparation method therefor, the magnesium alloy comprising the following element components by mass percentage: 8-12 wt % of Y, 0.6-3 wt % of Al and the remainder being Mg. The method comprises: (1) under a protective atmosphere, preparing a Mg—Y intermediate alloy, an aluminum ingot and a magnesium ingot into a magnesium alloy melt; (2) under a protective atmosphere, allowing the magnesium alloy melt to stand after stirring, then carrying out refining, degassing, and slag removal, allowing the magnesium alloy melt to stand again, then thermally insulating to obtain a magnesium alloy liquid; and (3) casting and molding the magnesium alloy liquid under a protective atmosphere, and forming a cast ingot; the three steps above ultimately obtain a high-strength, high-corrosion resistance ternary magnesium alloy.

Abstract: The invention relates to metallurgical production, and more particularly to preparing a charge ingot which is used for producing bronze ingots by casting. As a starting charge material, a spent inert anode previously used in the electrolytic production of aluminium is utilised, that is covered with alumina, allowing same to react with a bath which flows out of the anode during a thermal treatment performed at a temperature within a range of 950-1200° C., followed by soaking in a furnace for at least 3 days. The invention makes it possible to obtain a charge ingot with a minimal electrolyte content.

Abstract: A metal casting is heated using infrared energy by introducing the metal casting into a heating system with infrared emitters directed towards the casting, and activating at least a portion of the emitters. The heating system includes a heating chamber, a plurality of directional infrared emitters in the heating chamber, an optical temperature sensor directed towards a part location in the interior of the heating chamber, and a thermal shield that is movable between a deployed position and a retracted position, the thermal shield comprising an observation duct. The observation duct provides a line-of-sight path between the optical temperature sensor and the part location when the thermal shield is in the deployed position, and the thermal shield is between the plurality of infrared emitters and the part location when the thermal shield is in the deployed position.

Abstract: Disclosed herein are magnesium alloy based objects and methods of making and use thereof. For example, disclosed herein are methods of making a magnesium alloy based object, the methods comprising: heating an object comprising a preliminary magnesium alloy at a first temperature for a first amount of time, the preliminary magnesium alloy comprising a first intermetallic phase, a second intermetallic phase, and an alloy phase, to thereby substantially dissolving the first intermetallic phase into the alloy phase to form an object comprising an intermediate magnesium alloy, the intermediate magnesium alloy comprising the second intermetallic phase and the alloy phase; and heating the object comprising the intermediate magnesium alloy at a second temperature for a second amount of time to thereby substantially dissolving the second intermetallic phase into the alloy phase and minimizing incipient melting of the alloy phase to form the magnesium alloy based object.

Abstract: A process for producing a copper-beryllium alloy product. The process comprises preparing a base alloy having 0.15 wt %-4.0 wt % beryllium and having grains and an initial cross section area. The process further comprises cold working the base alloy to a percentage of cold reduction of area (CRA) greater than 40%, based on the initial cross section area, and heat treating the cold worked alloy to produce the copper-beryllium alloy product. The grain structure of the copper-beryllium alloy product has an orientation angle of less than 45° when viewed along the direction of the cold working. The copper-beryllium alloy product demonstrates a fatigue strength of at least 385 MPa after 106 cycles of testing.

Abstract: A copper alloy for use as material for a casting mold or a casting mold component selected from the group consisting of mold plate, mold tube, casting wheel, casting drum, casting roller, and melting crucible. The copper alloy includes, in percent by weight (proportion by mass of the melt analysis in %): silver (Ag) 0.020-0.50, zirconium (Zr) 0.050-0.50, phosphorus (P) not more than 0.060, chromium (Cr) not more than 0.005, balance copper (Cu) and other alloying elements including unavoidable impurities, with a proportion of the other alloying elements being less than or equal to (?) 0.50.

Abstract: Described are porous sintered metal bodies and methods of making porous sintered metal bodies by additive manufacturing methods.

Abstract: An additive method for preparing a large die blank for isothermal forging comprising preparing a plurality of titanium-zirconium-molybdenum alloy plate-shaped elements of a preset shape; preparing a plurality of foil-shaped intermediate layers of pure tantalum, a niobium-tungsten alloy and a tantalum-tungsten alloy of a preset shape; forming an assembly of a preset configuration, such that the foil-shaped intermediate layers are sandwiched between the titanium-zirconium-molybdenum alloy plate-shaped elements; applying an axial pressure to the assembly under high-temperature vacuum to perform diffusion connections to obtain a primary blank; subjecting the primary blank to a homogenization treatment under a high temperature, vacuum or inert gas protection to homogenize the structure and components at a connection interface in the primary blank; and cooling the homogenized primary blank to obtain a die blank.

Abstract: A copper-tin brazing wire and a preparation method and use thereof are provided. A copper-tin brazing wire includes a plurality of copper wires each having a composite metal layer on a surface thereof; the copper-tin brazing wire includes, in parts by weight, 75-84 parts of Cu, 20-25 parts of Sn, and 0.4-0.5 parts of P; and the composite metal layer includes Cu, Sn, and P, in which a mass ratio of Cu, Sn, and P is (45-55):(46-56):(0.5-1.5).

Abstract: A sintering powder comprising: a first type of metal particles having a mean longest dimension of from 100 nm to 50 ?m.

Abstract: A method of producing a CoFe alloy strip is provided. The method comprises hot rolling a CoFe alloy to form a hot rolled strip, followed by quenching the strip from a temperature above 700° C. to a temperature of 200° C. The CoFe alloy comprises an order/disorder temperature To/d and a ferritic/austenitic transformation temperature T?/?, wherein T?/?>To/d. The method further comprises cold rolling the hot rolled strip, after cold rolling, continuous annealing the strip at a maximum temperature T1, wherein 500° C.<T1<To/d, followed by cooling at a cooling rate R1 of at least 1 K/s in the temperature range of T1 to 500° C., and after continuous annealing, magnetic annealing the strip, or parts manufactured from the strip, at a temperature between 730° C. and T?/?.

Abstract: Some variations provide an additively manufactured article comprising a first region and a second region, wherein the first region is a solid region or a porous region, wherein the second region has a pore size larger than the first-region pore size, and wherein the first-region average permeability is lower than the second-region average permeability. Some variations provide a co-sintering method of making an architected material with regions having different permeabilities, in which different additive-manufacturing process parameters are applied to distinct regions of the structure. Other variations provide a wall-pinning method of making an architected material with regions having different permeabilities, in which additive-manufacturing process parameters are selected to sinter pinned feedstock powder between solid walls. Engineered structures with controlled permeability, integrated manifolds, and arbitrary geometries are disclosed, without the requirement of complex manufacturing.

Abstract: The present disclosure relates to the field of brazing material technologies, and particularly to a copper-phosphorus brazing wire for brazing a copper alloy spectacle frame as well as a preparing method and system thereof. The copper-phosphorus brazing wire for brazing a copper alloy spectacle frame includes components with following mass percentage, 87.1%˜91.4% of Cu, 1.5%˜2.6% of Ag, 5.9%˜8.4% of P, 0.2%˜0.42% of Al and 0.8%˜1.68% of Si. For the copper-phosphorus brazing wire according to the present disclosure, through coordination and cooperation of the components, impurity content is low and joint strength is high in a welding process; a mass ratio of the Si to the Al is a constant value, and a dense oxide film may be formed on a surface of a molten pool to hinder volatilization of Zn in a base material.

Abstract: A method and a system for manufacturing a structure includes the steps of: (a) supplying a mixture consisting a plurality of primitive materials at a target spot; (b) melting and solidifying the mixture disposed at the target spot to form a portion of a metallic structure consisting of an alloy of the plurality of the primitive materials; and (c) repeating steps (a) and (b) at a plurality of target spots in a three-dimensional space to produce the metallic structure of the alloy.

Abstract: The disclosure discloses a spinning process of a magnesium alloy wheel hub, which comprises the following steps: step 1, heating a magnesium alloy bar at 350-430° C. and keeping the temperature for 20 minutes; step 2, initially forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 6-15 mm/s; step 3, finally forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 5-8 mm/s; step 4, stress relief annealing on the final forged magnesium alloy blank; step 5, solid dissolving on the annealed magnesium alloy blank; step 6, taking out the solid-dissolved blank and directly spinning by a spinning machine; step 7, heating treatment and aging treatment. The magnesium alloy wheel hub with excellent performance is obtained by the process, and the spinning process and processing efficiency are greatly improved.

Abstract: A copper alloy powder is a copper alloy powder for additive manufacturing. The copper alloy powder contains more than 1.00 mass % and not more than 2.80 mass % of chromium, and a balance of copper. A method for producing an additively-manufactured article includes a first step of preparing a copper alloy powder containing more than 1.00 mass % and not more than 2.80 mass % of chromium and a balance of copper and a second step of producing the additively-manufactured article from the copper alloy powder, and the additively-manufactured article is produced such that forming a powder layer including the copper alloy powder, and solidifying the copper alloy powder at a predetermined position in the powder layer to form a shaped layer are sequentially repeated to stack such shaped layers to thus produce the additively-manufactured article.