The purpose of the present invention is to provide a method for smelting oxide ore, the method being capable of efficiently producing high quality metal. The present invention pertains to a smelting method for producing a metal such as ferronickel as a reduced product by reducing a mixture of a carbonaceous reducing agent and an oxide ore such as nickel oxide ore, the method comprising a reduction step in which the mixture is charged into a reduction furnace and the oxide ore is reduced by heating the mixture with a burner to obtain molten metal and slag. In the reduction step, the molten metal and the slag generated by reducing the oxide ore are separated by gravity separation. In the reduction step, it is preferable to heat the mixture such that the temperatures of the metal and the slag obtained in the reduction furnace are each in the range of 1300-1700° C.

A Ni—Al-RE ternary eutectic alloy and a preparation method thereof are provided. The alloy is composed of the following elements by weight percent, aluminum (Al) of 2.50% to 19.50%, rare earth (RE) of 1.30% to 20.0%, other impurity elements being less than or equal to 0.10%, and the rest being nickel (Ni). The microstructure of the alloy is in a completely eutectic form, and the density is 6.8 to 7.1 g/cm.sup.3. Raw materials are prepared according to the ratio, and are placed into a vacuum induction smelting furnace; the smelting furnace is vacuumized to 10.sup.−5 Pa, power is increased to ensure complete melting of the raw materials, and the molten alloy melt is poured into an iron mold to obtain alloy ingots. The eutectic phase in the microstructure of the alloy in the disclosure has high hardness.

The invention relates to methods for the manufacture of nickel alloys having optimized strip weldability (TIG without filler) from an alloy of the following composition (in wt %): C max. 0.05%, Co max. 2.5%, Ni the rest, especially >35-75.5%, Mn max. 1.0%, Si max. 0.5%, Mo >2 to 23%, P max. 0.2%, S max. 0.05%, N up to 0.2%, Cu ≤1.0%, Fe >0 to ≤7.0%, Ti >0 to <2.5%, Al >0 to 0.5%, Cr >14 to <25%, V max. 0.5%, W up to 3.5%, Mg up to 0.2%, Ca up to 0.02%, in that the alloy is smelted openly and cast as ingots, the ingots are subjected if necessary to at least one heat treatment, the ingots are then remelted at least one time by electroslag refining, the remelted ingot obtained in this way is subjected if necessary to at least one heat treatment, the ingot is subjected to at least one cold and/or hot deformation cycle, until strip material of predeterminable material thickness exists, the strip material is subdivided into strip sections of defined lengths/widths.

A method of making a metal alloy includes providing a molten metal alloy containing chromium, cerium and at least one of iron and nickel and providing an oxidizing gas and a reducing gas into the molten metal alloy to at least partially preferentially oxidize the cerium to ceria. The metal alloy may an iron or nickel based metal alloy which contains both cerium and ceria and at least 15 wt % Cr. The metal alloy may be used to form a balance of plant component for a fuel cell system.

A method for producing a metal film from an over 50% nickel alloy melts more than one ton of the alloy in a furnace, followed by VOD or VLF system treatment, then pouring off to form a pre-product, followed by re-melting by VAR and/or ESU. The pre-product is annealed 1-300 hours between 800 and 1350 C. under air or protection gas, then hot-formed between 1300 and 600 C., such that the pre-product then has 1-100 mm thickness after the forming and is not recrystallized, recovered, and/or (dynamically) recrystallized having a grain size below 300 m. The pre-product is pickled, then cold-formed to produce a film having 10-600 m end thickness and a deformation ratio greater than 90%. The film is cut into 5-300 mm strips, annealed 1 second to 5 hours under protection gas between 600 and 1200 C. in a continuous furnace, then recrystallized to have a high cubic texture proportion.

The invention relates to an austenitic alloy comprising the following elements in weight %: C 0.03; Si 1.0; 5 Mn 1.5; S 0.03; P 0.03; Cr 25.0 to 33.0; Ni 42.0 to 52.0; 10 Mo 6.0 to 9.0; N 0.07-0.11; Cu 0.4; Balance Fe and unavoidable impurities; and characterized in that the austenitic alloy fulfills the following condition: E.sub.Ni>1.864*E.sub.Cr19.92 wherein E.sub.Cr=[wt % Cr]+[wt % Mo]+1.5*[wt % Si] and E.sub.Ni=[wt % Ni]+30*[wt % C]+30*[wt % N]+0.5*[wt % Mn]+0.5*[wt % Cu]. The invention also relates to a manufacturing method and an object comprising said alloy. The alloy and objects made thereof have less than 0.3% intermetallic phases after solidification.

A method is provided of making a magnetocaloric alloy composition comprising Ni, Co, Mn, and Ti, which preferably includes certain beneficial substitutional elements, by melting the composition and rapidly solidifying the melted composition at a cooling rate of at least 100 K/second (Kelvin/second) to improve a magnetocaloric property of the composition. The rapidly solidified composition can be heat treated to homogenize the composition and annealed to tune the magneto-structural transition for use in a regenerator.

A type of high-strength and ductile multicomponent precision resistance alloys and fabrication methods thereof are provided. The alloys are composed of the following components by atomic percentage: Ni 45-60%, Cr 15-30%, Fe 5-20%, Al 5-15%, Mn 3-5%, Cu 0.2-3%, Si 1-5%. Particularly, the sum of the atomic percentages of Mn, Cu and Si is 13% and 4.2%, the sum of the atomic percentages of Ni, Cr, Fe and Al is 70% and 95.8%, and the sum of the atomic percentages of all the components is 100%. The multicomponent alloys prepared by the methods exhibit face-cantered cubic matrix and possess high strength and good ductility; further, they have high resistivity and excellent resistivity stability in wide temperature ranges below 773 K.

Disclosed herein are embodiments of a nickel-based alloy. In particular embodiments, the nickel-based alloy is configured for use in applications involving supercritical fluids. The disclosed nickel-based alloy embodiments are highly resistant to corrosion and exhibit high stability and thus are suited for use in vessels, boilers, piping, and other receptacles that contain or are used with supercritical fluids. Method embodiments of making the nickel-based alloy also are disclosed.

Disclosed herein are embodiments of a nickel-based alloy. In particular embodiments, the nickel-based alloy is configured for use in applications involving supercritical fluids. The disclosed nickel-based alloy embodiments are highly resistant to corrosion and exhibit high stability and thus are suited for use in vessels, boilers, piping, and other receptacles that contain or are used with supercritical fluids. Method embodiments of making the nickel-based alloy also are disclosed.