Systems and methods for drawing high aspect ratio metallic glass-based materials are provided. Methods of drawing a high aspect ratio metallic glass-based material are premised on stably drawing high aspect ratio metallic glass-based material from a preform metallic glass-based composition, accounting for the relationships between: the desired formation of an amorphous structure that is substantially homogenous along the majority of the length of the drawn high aspect ratio material; the desired final geometry of the drawn high aspect ratio material; the nature of the force that is used to draw the molten metallic glass-based composition; the velocity at which the high aspect ratio material is drawn; the viscosity profile of the material along its length as it is being drawn; and/or the effect of temperature on the metallic glass-based material. A precise thermal treatment is imposed along the forming length of the drawn material so as to enable a steady state drawing process, the precise thermal treatment being based on: the desire to develop a substantially same amorphous structure along the length of the drawn material; the desired final geometry for the drawn material; the nature of the force used to draw the material; the velocity at which the material is being drawn; and/or the thermal treatment's impact on the viscosity profile of the material along its length as it is being drawn.

An annealing and drawing device for an oxygen-free copper tube used for a mobile phone heat pipe with a large diameter-wall thickness ratio, a drawing die is installed in a box body. An annealing tube is installed between the drawing die and the box body; a fixing plate is disposed on a side of the drawing die; a supporting roller is rotatably connected to the fixing plate. A tension adjusting mechanism is disposed on a side of the supporting roller. An outer side of an end of the box body is provided with a mounting plate. A supporting frame is fixed on a side of an upper end of the mounting plate, a servo motor is fixed at an upper end of the supporting frame, and a rotating shaft is fixed at an end of an output shaft of the servo motor. The rotating shaft is in key joint with a winding wheel.

The present invention relates to a method for forming a hollow 26 of a ferritic FeCrAl alloy into a tube 2. While tubes made of powder metallurgical, dispersion hardened, ferritic FeCrAl alloys are commercially available, hollows made of FeCrAl alloys so far can hardly be formed into tubes of small dimensions. The major reason for the problems in forming hollows of a ferritic FeCrAI alloy into a finished product is that FeCrAl alloys are brittle. It is therefore an aspect of the present invention to provide a tube 2 made of a ferritic FeCrAl alloy having arbitrary small dimensions. Furthermore, it is an aspect of the present invention to provide a machine 1 and a method for forming a tubular hollow 26 into a finished tube 2 of a ferritic FeCrAl alloy. At least one of the above aspects is addressed by a method for forming a hollow into a tube 2 comprising the steps providing the hollow 26 of a ferritic FeCrAl alloy, heating the hollow 26 to a temperature in a range from 90 C. to 150 C., and forming the heated hollow 26 by pilger milling or drawing into the tube.

The present invention relates to a method for forming a hollow 26 of a ferritic FeCrAl alloy into a tube 2. While tubes made of powder metallurgical, dispersion hardened, ferritic FeCrAl alloys are commercially available, hollows made of FeCrAl alloys so far can hardly be formed into tubes of small dimensions. The major reason for the problems in forming hollows of a ferritic FeCrAI alloy into a finished product is that FeCrAl alloys are brittle. It is therefore an aspect of the present invention to provide a tube 2 made of a ferritic FeCrAl alloy having arbitrary small dimensions. Furthermore, it is an aspect of the present invention to provide a machine 1 and a method for forming a tubular hollow 26 into a finished tube 2 of a ferritic FeCrAl alloy. At least one of the above aspects is addressed by a method for forming a hollow into a tube 2 comprising the steps providing the hollow 26 of a ferritic FeCrAl alloy, heating the hollow 26 to a temperature in a range from 90 C. to 150 C., and forming the heated hollow 26 by pilger milling or drawing into the tube.

A method for making a metal wire adapted for wire electrical discharge machining, comprises the steps of: A. Preparing a brass core wire having a diameter of at least 1.2 mm and having a zinc content of less than 40% by weight; B. Plating at least a coating material of zinc alloy having a zinc content of more than 75% by weight on the brass core wire to form a coating layer on the core wire so as to form a coarse wire by a spray plating process by atomizing and depositing a plurality of zinc alloy particles of the coating material on at least a surface portion of the brass core wire to form a plurality of cleavages or cavities on or in an outer surface of the coating layer of the coarse wire; and C. Drawing or stretching the coarse wire to obtain a metal wire product having a diameter ranging from 0.15 mm through 0.35 mm.

An aluminum alloy wire is composed of an aluminum alloy. The aluminum alloy contains equal to or more than 0.005 mass % and equal to or less than 2.2 mass % of Fe, and a remainder of Al and an inevitable impurity. In a transverse section of the aluminum alloy wire, a surface-layer crystallization measurement region in a shape of a rectangle having a short side length of 50 m and a long side length of 75 m is defined within a surface layer region extending from a surface of the aluminum alloy wire by 50 m in a depth direction, and an average area of crystallized materials in the surface-layer crystallization measurement region is equal to or more than 0.05 m.sup.2 and equal to or less than 3 m.sup.2.

An aluminum alloy wire is composed of an aluminum alloy. The aluminum alloy contains equal to or more than 0.005 mass % and equal to or less than 2.2 mass % of Fe, and a remainder of Al and an inevitable impurity. In a transverse section of the aluminum alloy wire, a surface-layer crystallization measurement region in a shape of a rectangle having a short side length of 50 m and a long side length of 75 m is defined within a surface layer region extending from a surface of the aluminum alloy wire by 50 m in a depth direction, and an average area of crystallized materials in the surface-layer crystallization measurement region is equal to or more than 0.05 m.sup.2 and equal to or less than 3 m.sup.2.

A continuous wire drawing apparatus includes: a wire releasing scrollbar and a wire collecting scrollbar being respectively a wire releasing end and a wire collecting end of a metal wire material; a wire drawing force control unit and a back force control unit providing a drawing force and a back force to the wire collecting end and the wire releasing end respectively; a heating unit disposed between the wire releasing end and the wire collecting end, and adapted to heat the metal wire material continuously at a heating temperature in a heating area, whereby the metal wire material is deformed by a strength difference between the drawing force and the back force; and a cooling unit disposed between the heating unit and the wire collecting end, and adapted to cool the metal wire material continuously at a cooling temperature in a cooling area.

A continuous wire drawing apparatus includes: a wire releasing scrollbar and a wire collecting scrollbar being respectively a wire releasing end and a wire collecting end of a metal wire material; a wire drawing force control unit and a back force control unit providing a drawing force and a back force to the wire collecting end and the wire releasing end respectively; a heating unit disposed between the wire releasing end and the wire collecting end, and adapted to heat the metal wire material continuously at a heating temperature in a heating area, whereby the metal wire material is deformed by a strength difference between the drawing force and the back force; and a cooling unit disposed between the heating unit and the wire collecting end, and adapted to cool the metal wire material continuously at a cooling temperature in a cooling area.

The invention relates to an electrical transportation wire made of aluminum alloy comprising aluminum, zirconium and unavoidable impurities, characterized in that said alloy comprises at least 80 parts by weight of zirconium in the form of precipitates (Al.sub.3Zr) per 100 parts by weight of zirconium in said aluminum alloy.