Device and method for injection moulding a metal alloy intended for manufacturing at least one part made of an amorphous metal alloy or metallic glass, wherein: an injection mould (2) delimits a cavity that has a receiving face (4) and a frontal moulding face (5) opposite the receiving face, at least one sacrificial shaping insert (7) is placed in said cavity and has a rear face (8), at least one contact zone of which is adjacent to at least one contact zone of said receiving face of the cavity and a front face (9) that is situated opposite said moulding face of the mould and provided with a recessed shape, and an injection piston (I I) is movable in a chamber (12) of the mould and communicates with the moulding impression.

Systems and methods in accordance with embodiments of the invention fabricate objects including amorphous metals using techniques akin to additive manufacturing. In one embodiment, a method of fabricating an object that includes an amorphous metal includes: applying a first layer of molten metallic alloy to a surface; cooling the first layer of molten metallic alloy such that it solidifies and thereby forms a first layer including amorphous metal; subsequently applying at least one layer of molten metallic alloy onto a layer including amorphous metal; cooling each subsequently applied layer of molten metallic alloy such that it solidifies and thereby forms a layer including amorphous metal prior to the application of any adjacent layer of molten metallic alloy; where the aggregate of the solidified layers including amorphous metal forms a desired shape in the object to be fabricated; and removing at least the first layer including amorphous metal from the surface.

The invention provides a method of producing an amorphous alloy ribbon, the method including a step of producing an amorphous alloy ribbon by discharging a molten alloy through a rectangular opening of a molten metal nozzle having a molten metal flow channel along which the molten alloy flows, the opening being an end of the molten metal flow channel, onto a surface of a rotating chill roll, in which, among wall surfaces of the molten metal flow channel, a maximum height Rz(t) of a surface t, which is a wall surface parallel to a flow direction of the molten alloy and to a short side direction of the opening, is 10.5 m or less.

The disclosure is directed to methods of forming metallic glass multilayers by depositing a liquid layer of a metallic glass forming alloy over a metallic glass layer, and to multilayered metallic glass articles produced using such methods.

An Fe-based amorphous alloy of the present invention has a composition represented by formula (Fe.sub.100-a-b-c-d-eCr.sub.aP.sub.bC.sub.cB.sub.dSi.sub.e (a, b, c, d, and e are in terms of at %), where 0 at %a1.9 at %, 1.7 at %b8.0 at %, 0 at %e1.0 at %, an Fe content (100-a-b-c-d-e) is 77 at % or more, 19 at %b+c+d+e21.1 at %, 0.08b/(b+c+d)0.43, 0.06c/(c+d)0.87, and the Fe-based amorphous alloy has a glass transition temperature (Tg).

The present invention provides an iron-based amorphous/nanocrystalline alloy as shown in formula Fe.sub.(100-a-b-c-d-e)B.sub.aSi.sub.bP.sub.cC.sub.dCu.sub.e, wherein d+(b/c)=0.85-1.3, and a viscosity coefficient n is (3.0-8.0)*10.sup.3 Pa/s. The present application further provides a preparation method for the iron-based amorphous/nanocrystalline alloy. According to the present application, the dynamic viscosity coefficient n is regulated by means of a change in the content of the elements in the alloy, such that the control range of viscosity of molten steel is ensured, the molten steel has higher purity, and the continuity of casting and the surface quality of a strip are guaranteed.

NiFeSiB and NiFeSiBP metallic glass forming alloys and metallic glasses are provided. Metallic glass rods with diameters of at least one, up to three millimeters, or more can be formed from the disclosed alloys. The disclosed metallic glasses demonstrate high yield strength combined with high corrosion resistance, while for a relatively high Fe contents the metallic glasses are ferromagnetic.

Provided is a highly productive method for producing a magnetic sheet with a reduced number of times of unwinding and winding operations, and a method for producing a magnetic sheet with excellent magnetic characteristics and good isotropy. The method for producing a magnetic sheet includes a heat treatment process of heating an amorphous alloy ribbon to produce a nanocrystalline alloy ribbon, and a bonding process of bonding an adhesive layer to one surface of the nanocrystalline alloy ribbon. The heat treatment process involves bringing a ribbon pressing member into contact with a surface of the amorphous alloy ribbon opposite to a surface contacting a heater, and applying a tension of 18 MPa or less to the amorphous alloy ribbon. The bonding process is performed consecutively to the heat treatment process, and involves bonding an adhesive layer to one surface of the nanocrystalline alloy ribbon while conveying the nanocrystalline alloy ribbon.

A method for manufacturing an alloy ribbon piece containing a nanocrystalline alloy includes: preparing an alloy ribbon containing an FeNiB-based amorphous alloy; heating a processing planned portion at a circumference of a crystallization planned portion that is an area in which the alloy ribbon piece is punched of the alloy ribbon to a first temperature range in which crystal grains of Fe and crystal grains of Fe.sub.2B deposit to cause the crystal grains of Fe and the crystal grains of Fe.sub.2B to deposit, and simultaneously heating the crystallization planned portion to a second temperature range of a crystallization starting temperature or higher and lower than the first temperature range to crystallize the crystallization planned portion; and punching an area including the crystallization planned portion from the alloy ribbon by shearing the processing planned portion of the alloy ribbon after the thermal processing step to form the alloy ribbon piece.

A needle for a warp knitting machine, manufactured by means of an amorphous alloy injection molding process and comprising the following components: in parts by weight, 57.5-65.5 parts of zirconium, 11-16 parts of copper, 7-13 parts of nickel, 5-10 parts of titanium, 1-7 parts of aluminum, 1-7 parts of beryllium and 0.3-2 parts of yttrium. A method for manufacturing a needle for a warp knitting machine by means of an amorphous alloy injection molding process, comprising the following steps: (1) material mixing and smelting for manufacture into small blocks; (2) injection molding; (3) alloy opening removal; (4) thickness machining; (5) slotting; (6) polishing; and (7) electroplating. Beryllium and yttrium are added into amorphous alloy zirconium-based metal; beryllium can improve the toughness of a latch needle product, and has high fatigue limit and high wear resistance; yttrium powder can improve the strength, toughness and wear resistance of a latch needle blank.