A method for producing metal powders by gas atomization is provided, including providing a metal charge; melting the metal charge inside an electric-arc furnace, controlling its composition until a molten metal bath having a desired composition is obtained; tapping the bath from the furnace, collecting it inside a ladle; refining the bath under controlled atmosphere, vacuum, or overpressure condition; atomizing the refined bath by feeding it into a gas atomizer, inside which a molten metal bath flow is produced, and impinging the molten metal bath flow with an atomization inert gas stream for the atomization of the molten metal bath into metal powders; and extracting the obtained metal powders from the gas atomizer.

Provided are: an alloy powder that can be obtained from a waste lithium ion battery, wherein the alloy powder can be dissolved in an acid solution and enables recovery of metals contained in the alloy powder; and a method for producing the alloy powder. This alloy powder contains Cu and at least one of Ni and Co as constituent components, wherein a portion having a higher concentration of the at least one of Ni and Co than the average concentration in the entire alloy powder is distributed on at least the surface, and the phosphorus grade is less than 0.1% by mass. The method for producing the alloy powder includes a powdering step for powdering a molten alloy using a gas atomization method, the molten alloy containing Cu and at least one of Ni and Co as constituent components and having a phosphorus grade of less than 0.1% by mass.

The present disclosure relates to a device for melting a material without a crucible and for atomizing the melted material in order to produce powder, comprising: an atomizing nozzle; an induction coil having windings, which become narrower in the direction of the atomizing nozzle at least in some sections; and a material bar at least partially inserted into the induction coil. The induction coil is designed to melt the material of the material bar in order to produce a melt flow. The induction coil and the atomizing nozzle are arranged in such a way that the melt flow is or can be introduced into the atomizing nozzle through a first opening of the atomizing nozzle in order to atomize the melt flow by means of an atomizing gas, which can be introduced into the atomizing nozzle.

A lead-based alloy containing alloying additions of bismuth, antimony, arsenic, and tin is used for the production of doped leady oxides, lead-acid battery active materials, lead-acid battery electrodes, and lead-acid batteries.

A method of manufacturing iron powder configured for improving a recovery rate of chromium using ingot including chromium in a content suitably higher than a target content at the time of manufacturing iron powder including chromium, may include preparing ingot further including chromium (Cr) so that a content of chromium (Cr) in the ingot is 1 to 30% higher than a target content of chromium (Cr) in finally produced iron powder; dissolving the ingot to prepare molten steel; forming iron powder by performing water atomization on the molten steel; and adjusting a content of carbon (C) in the iron powder by performing reduction treatment on the iron powder.

A system for producing rare earth magnets from metal powder includes a melting cold hearth atomization system for producing the metal powder from a scrap material and an additive manufacturing system for building the rare earth magnets using the metal powder and an additive manufacturing process. The melting cold hearth atomization system includes a reactor for melting the scrap material into a molten metal, and one or more atomizers for spheroidizing the molten metal into powder particles that form the metal powder. The additive manufacturing system includes magnetized build plates for aligning the grain structures of the rare earth magnets during a building step of the additive manufacturing process. The scrap material can include recycled rare earth magnets, recycled metal powder containing rare earth metal, and recycled rare earth metal parts.

An iron-based metal powder for ultra-high-speed laser cladding comprising chemical composition and mass percentage of the metal powder of: C 0.61.0%, Cr 17.020.0%, Ni 5.06.5%, Mn 2.04.0%, Mo 1.01.5%, Ti 4.06.0%, B 1.01.5%, N 0.080.15%, Si0.5%, P0.030%, S0.030%, balance of Fe and unavoidable impurities, wherein the particle size of the metal powder is 1565 m, the fluidity is 1620 s/50 g.

Provided are: an alloy powder that can be obtained from a waste lithium ion battery, wherein the alloy powder can be dissolved in an acid solution and enables recovery of metals contained in the alloy powder; and a method for producing the alloy powder. This alloy powder contains Cu and at least one of Ni and Co as constituent components, wherein a portion having a higher concentration of the at least one of Ni and Co than the average concentration in the entire alloy powder is distributed on at least the surface, and the phosphorus grade is less than 0.1% by mass. The method for producing the alloy powder includes a powdering step for powdering a molten alloy using a gas atomization method, the molten alloy containing Cu and at least one of Ni and Co as constituent components and having a phosphorus grade of less than 0.1% by mass.

An expeditionary additive manufacturing (ExAM) system for manufacturing metal parts includes a mobile foundry system configured to produce an alloy powder from a feedstock, and an additive manufacturing system configured to fabricate a part using the alloy powder. The additive manufacturing system includes a computer system having parts data and machine learning programs in signal communication with a cloud service. The parts data can include material specifications, drawings, process specifications, assembly instructions, and product verification requirements for the part. An expeditionary additive manufacturing (ExAM) method for making metal parts includes the steps of transporting the mobile foundry system and the additive manufacturing system to a desired location; making the alloy powder at the location using the mobile foundry system; and building a part at the location using the additive manufacturing system.

A dynamically impacting method comprising simultaneously peening a substrate surface and forming a thin film of metallic glass on the substrate surface for increasing the surface hardness, fatigue resistance, anti-fracture toughness and corrosion resistance of the substrate simultaneously.