[Object] Provided is a method for manufacturing atomized metal powder having a high amorphous material fraction by using a water atomizing method.

[Solution] A method for manufacturing atomized metal powder in which atomized metal powder having an amorphous material fraction of 90% or more is obtained, the method including ejecting high-pressure water so as to collide with a molten metal stream flowing vertically downward, separating the molten metal stream into metal powder, and cooling the metal powder, in which the high-pressure water collides with the molten metal with a collision pressure of 20 MPa or higher, and in which a temperature of the molten metal and/or a temperature of the high-pressure water are controlled so that the high-pressure water is in a subcritical state or a supercritical state on a collision surface with the molten metal.

A method for manufacturing a powder magnetic core according to an aspect includes filling a case with a soft magnetic powder obtained by pulverizing a soft magnetic foil having an amorphous structure or a nanocrystal structure, applying at least one of a vibration and a magnetic field to the soft magnetic powder contained in the case and thereby aligning the soft magnetic powder, and injecting a curable resin into the case, impregnating the aligned soft magnetic powder with the curable resin, and then curing the curable resin while deaerating the curable resin under a reduced pressure.

A method for manufacturing a powder magnetic core according to an aspect includes filling a case with a soft magnetic powder obtained by pulverizing a soft magnetic foil having an amorphous structure or a nanocrystal structure, applying at least one of a vibration and a magnetic field to the soft magnetic powder contained in the case and thereby aligning the soft magnetic powder, and injecting a curable resin into the case, impregnating the aligned soft magnetic powder with the curable resin, and then curing the curable resin while deaerating the curable resin under a reduced pressure.

Novel metallic systems and methods for their fabrication provide an extreme creep-resistant nano-crystalline metallic material. The material comprises a matrix formed of a solvent metal with crystalline grains having diameters of no more than about 500 nm, and a plurality of dispersed metallic particles formed on the basis of a solute metal in the solvent metal matrix and having diameters of no more than about 200 nm. The particle density along the grain boundary of the matrix is as high as about 2 nm.sup.2 of grain boundary area per particle so as to substantially block grain boundary motion and rotation and limit creep at temperatures above 35% of the melting point of the material.

The invention relates to a powder for an additive manufacturing method having a d.sub.2-value of 10 m or more, a d.sub.90-value of 200 m or less and a quotient E.sub.Law/d.sub.500.8 KJ(KG*m), wherein E.sub.Law indicates the avalanche energy and d.sub.50 the average particle diameter. The invention further relates to a method for producing a component by means of additive manufacturing using the claimed powder.

A method for manufacturing a three-dimensional shaped object by laminating a layer to manufacture the three-dimensional shaped object, the method including a layer forming step of forming the layer using a constituent material containing amorphous metal powder and a melting and solidifying step of irradiating the layer with a laser to melt and solidify the amorphous metal powder, in which in the melting and solidifying step, a melted and solidified portion obtained by melting and solidifying the amorphous metal powder by being irradiated with the laser is formed and irradiation of the laser is repeated so that at least one-half of a width of the melted and solidified portion overlaps, thereby allowing the layer to become a metal layer in which an amorphous region and a crystal region are formed in a mesh shape.

A method for producing a water-atomized metal powder, comprising applying water to a molten metal stream, dividing the molten metal stream into a metal powder, and cooling the metal powder, wherein the metal powder is further subjected to secondary cooling with cooling capacity having a minimum heat flux point (MHF point) higher than the surface temperature of the metal powder in addition to the cooling and the secondary cooling is performed from a temperature range where the temperature of the metal powder after the cooling is not lower than the cooling start temperature necessary for amorphization nor higher than the minimum heat flux point (MHF point).

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.

Provided is a method for manufacturing soft magnetic iron powder.

A method for manufacturing soft magnetic iron powder, the method including ejecting high-pressure water to collide with a molten metal stream falling vertically downward, breaking up the molten metal stream into metal powder, and cooling the metal powder, in which, when a falling rate of the molten metal stream per unit time is defined as Qm (kg/min) and an ejection rate of high-pressure water per unit time is defined as Qaq (kg/min), a mass ratio (Qaq/Qm) is 50 or more, and a total content of ferrous constituents (Fe, Ni, and Co) is 76 at % or more.

Provided is a method for manufacturing soft magnetic iron powder.

A method for manufacturing soft magnetic iron powder, the method including ejecting high-pressure water to collide with a molten metal stream falling vertically downward, breaking up the molten metal stream into metal powder, and cooling the metal powder, in which, when a falling rate of the molten metal stream per unit time is defined as Qm (kg/min) and an ejection rate of high-pressure water per unit time is defined as Qaq (kg/min), a mass ratio (Qaq/Qm) is 50 or more, and a total content of ferrous constituents (Fe, Ni, and Co) is 76 at % or more.