Provided is steel for a wind power gear with improved purity and reliability. The chemical components thereof comprise, in percentages by mass: 0.15-0.19% of C, ≤0.4% of Si, 0.5-0.7% of Mn, ≤0.012% of P, ≤0.006% of S, 1.5-1.8% of Cr, 0.28-0.35% of Mo, 1.4-1.7% of Ni, and 0.02-0.04% of Al, with the balance being Fe and inevitable impurities. A smelting method therefor comprises adding raw materials to a converter for primary melting, transferring same to a refining furnace for refining, carrying out continuous casting after vacuum degassing, and transferring same to a gas protection furnace for electroslag remelting. According to the present invention, a pure electroslag master batch is obtained by continuous casting, and the purity of the material is further improved by means of an electroslag remelting procedure; and the prepared steel material is used in a wind power gear, such that the flaw detection pass rate is significantly increased, large-particle inclusions in the steel material are significantly reduced, and the inclusions are fine and dispersed.

Provided is steel for a wind power gear with improved purity and reliability. The chemical components thereof comprise, in percentages by mass: 0.15-0.19% of C, ≤0.4% of Si, 0.5-0.7% of Mn, ≤0.012% of P, ≤0.006% of S, 1.5-1.8% of Cr, 0.28-0.35% of Mo, 1.4-1.7% of Ni, and 0.02-0.04% of Al, with the balance being Fe and inevitable impurities. A smelting method therefor comprises adding raw materials to a converter for primary melting, transferring same to a refining furnace for refining, carrying out continuous casting after vacuum degassing, and transferring same to a gas protection furnace for electroslag remelting. According to the present invention, a pure electroslag master batch is obtained by continuous casting, and the purity of the material is further improved by means of an electroslag remelting procedure; and the prepared steel material is used in a wind power gear, such that the flaw detection pass rate is significantly increased, large-particle inclusions in the steel material are significantly reduced, and the inclusions are fine and dispersed.

A device for producing purified, especially high-purity, magnesium includes a reactor for vacuum distillation that is extended along a longitudinal axis (L). The reactor defines a reactor inner chamber having a heating region for heating magnesium. A crucible forms a crucible inner chamber for receiving purified magnesium vaporized and condensed by the device. A radial projection in the heating region defines a contact surface that extends essentially transverse to the longitudinal axis (L) and forms an essentially sealed connection with an edge of the crucible adjacent to the crucible inner chamber.

A device for producing purified, especially high-purity, magnesium includes a reactor for vacuum distillation that is extended along a longitudinal axis (L). The reactor defines a reactor inner chamber having a heating region for heating magnesium. A crucible forms a crucible inner chamber for receiving purified magnesium vaporized and condensed by the device. A radial projection in the heating region defines a contact surface that extends essentially transverse to the longitudinal axis (L) and forms an essentially sealed connection with an edge of the crucible adjacent to the crucible inner chamber.

Disclosed is a process for the production of a purified soft lead product, including a first distillation step for distilling lead from a molten solder mixture to produce as overhead a first concentrated lead stream and as first bottom product a molten crude tin mixture. The process also includes a soft lead refining step for removing at least one contaminant selected from arsenic, tin and/or antimony from the first concentrated lead stream by treating the stream at a temperature of less than 600° C. with a first base and a first oxidant stronger than air, resulting in the formation of a third supernatant dross containing a metalate compound of the contaminant, followed by separating the third supernatant dross from the purified soft lead stream or product, whereby the third supernatant dross contains at most 1.0% wt of chlorine.

Metal compositions and production processes are described. A process for the production of a metal composition includes a first distillation step separating off by evaporation primarily lead from a solder mixture of lead, tin, and antimony, thereby producing as a first concentrated lead stream. The process includes a second distillation step separating primarily lead and antimony from the metal composition, thereby producing a second concentrated lead stream and a second bottom product. The method also includes a third distillation step separating primarily lead and antimony from the second concentrated lead stream, thereby producing a third concentrated lead stream and a third bottom product.

A method of producing a metal superalloy may include: providing a charge of metal materials; melting the charge of metal materials in an electric-arc furnace to obtain a first melt of the charge of metal materials; performing Argon Oxygen Decarburization (A.O.D.) treatment on the first melt to obtain a decarburized and refined first melt; solidifying the decarburized and refined first melt to obtain first ingots; melting the first ingots in a Vacuum Induction Degassing and Pouring (V.I.D.P.) furnace to obtain a second melt; solidifying the second melt to obtain second ingots; melting the second ingots in a Vacuum Arc Remelting (V.A.R.) furnace to obtain a third melt; and solidifying the third melt to obtain the metal superalloy. The charge of metal materials may have a weight greater than or equal to forty tons and less than or equal to sixty tons.

A method of producing a metal superalloy may include: providing a charge of metal materials; melting the charge of metal materials in an electric-arc furnace to obtain a first melt of the charge of metal materials; performing Argon Oxygen Decarburization (A.O.D.) treatment on the first melt to obtain a decarburized and refined first melt; solidifying the decarburized and refined first melt to obtain first ingots; melting the first ingots in a Vacuum Induction Degassing and Pouring (V.I.D.P.) furnace to obtain a second melt; solidifying the second melt to obtain second ingots; melting the second ingots in a Vacuum Arc Remelting (V.A.R.) furnace to obtain a third melt; and solidifying the third melt to obtain the metal superalloy. The charge of metal materials may have a weight greater than or equal to forty tons and less than or equal to sixty tons.

A novel medium entropy alloy having the chemical formula Mo.sub.xCrNiCo (atomic %) where (x ranges from ˜0.4 to ˜1.0).

Provided is a non-oriented electrical steel sheet having such a low Al concentration so that it is excellent in terms of the recycling efficiency of scrap iron and having a high magnetic flux density and low iron loss.

The non-oriented electrical steel sheet according to the present invention has a chemical composition containing C; 0.0050 mass % or less, Si; 1.5 mass % to 5.0 mass %, Mn; 0.2 mass % to 3.0 mass %, sol.Al; 0.0030 mass % or less, P; 0.2 mass % or less, S; 0.0050 mass % or less, N; 0.0040 mass % or less, T.Ca; 0.0010 mass % to 0.0080 mass %, T.O; 0.0100 mass % or less, REM; 0.0001 mass % to 0.0050 mass %, and a balance of Fe and inevitable impurities, in which a value of a mass-related fractional expression ((T.Ca+REM)/(T.O+S)), which is a relational expression for the masses of the four constituents described above, that is, T.Ca, REM, T.O, and S, is 0.4 or more.