A sintered material includes a composition composed of iron-based alloy, and a texture containing 200 or more and 1350 or less of compound particles having a size of 0.3 μm or more per unit area of 100 μm×100 μm in a cross section, and a relative density is 93% or more.

Composite parts (10), methods of making the same (400), and tooling systems (200) for making the same are disclosed. According to one example, a high-pressure die casting process is used to manufacture a composite part (10) that is made from a composite metal material (12) with a metal matrix phase (20) and a particle phase (22) and includes an interior region (14) and an exterior region (16), where an average concentration of the particle phase (22) in the composite metal material (12) is higher in the exterior region (16) than in the interior region (14). An interior surface (206a, 206b) of a die mold (206) may be coated with a particle phase (22) (e.g., a ceramic-based material) and a molten metal matrix phase (20) (e.g., an aluminum-based material) may then be introduced into the die mold (206) such that a composite part (10) is formed with an exterior region (16) or outer layer that is particle-rich compared to an interior region (14).

Disclosed is a partially diffusion-alloyed steel powder having excellent fluidity, formability, and compressibility without containing Ni, Cr, and Si. A partially diffusion-alloyed steel powder having excellent fluidity, formability, and compressibility that includes an iron-based powder and Mo diffusionally adhered to a surface of the iron-based powder, in which Mo content is 0.2 mass % to 2.0 mass %, a weight-based median diameter D50 is 40 μm or more, and among particles contained in the partially diffusion-alloyed steel powder, those particles having an equivalent circular diameter of 50 μm to 200 μm have a number average of solidity of 0.70 to 0.86, the solidity being defined as (particle cross-sectional area/envelope-inside area).

A high-strength steel sheet includes a steel structure with: ferrite being 35% to 80%, martensite being 5% to 35%, and tempered martensite being 0% to 5% in terms of area fraction; retained austenite being 8% or more in terms of volume fraction; an average grain size of: the ferrite being 6 μm or less; and the retained austenite being 3 μm or less; a value obtained by dividing an area fraction of blocky austenite by a sum of area fractions of lath-like austenite and the blocky austenite being 0.6 or more; a value obtained by dividing, by mass %, an average Mn content in the retained austenite by an average Mn content in the ferrite being 1.5 or more; and a value obtained by dividing, by mass %, an average C content in the retained austenite by an average C content in the ferrite being 3.0 or more.

A Fe—Ni alloy powder has a small particle diameter, can achieve high μ′ in a high frequency band, and has high heat resistance. The Fe—Ni alloy powder can be obtained in such a manner that an acidic aqueous solution containing a trivalent Fe ion and a Ni ion is neutralized with an alkali aqueous solution in the presence of a phosphorus-containing ion. This provides a slurry of a precipitate of a hydrated oxide. Then, a silane compound is added to the slurry to coat the precipitate of the hydrated oxide with a hydrolyzate of the silane compound. The precipitate of the hydrated oxide after coating is recovered through solid-liquid separation. The recovered precipitate is heated to provide iron particles coated with a silicon oxide, and then the silicon oxide coating is removed through dissolution.

A Fe—Ni alloy powder has a small particle diameter, can achieve high μ′ in a high frequency band, and has high heat resistance. The Fe—Ni alloy powder can be obtained in such a manner that an acidic aqueous solution containing a trivalent Fe ion and a Ni ion is neutralized with an alkali aqueous solution in the presence of a phosphorus-containing ion. This provides a slurry of a precipitate of a hydrated oxide. Then, a silane compound is added to the slurry to coat the precipitate of the hydrated oxide with a hydrolyzate of the silane compound. The precipitate of the hydrated oxide after coating is recovered through solid-liquid separation. The recovered precipitate is heated to provide iron particles coated with a silicon oxide, and then the silicon oxide coating is removed through dissolution.

An alloy powder having an alloy composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cCr.sub.dSn.sub.eC.sub.f, wherein a, b, c, d, e and f are atomic % meeting 0.80≤a≤1.80, 2.00≤b≤10.00, 11.00≤c≤17.00, 0.10≤d≤2.00, 0.01≤e≤1.50, and 0.10≤f≤0.40.

The invention relates to a method for producing a sintered component comprising the steps: providing a metallic powder; filling the powder into a powder press; pressing the powder to form a green compact; removing the green compact from the powder press; sintering the green compact into a sintered component with pores; optional redensification of the sintered component; hardening of the sintered component, wherein the pores of the sintered component, prior to hardening at least in that region of the surface of the sintered component which is subjected to a hardening, are at least partially filled with a filling agent.

A powder material for an additive manufacturing process and a method of manufacturing a three-dimensional article via an additive manufacturing process. The powder material comprises an iron-based alloy including alloying elements of carbon (C) and copper (Cu). The iron-based alloy may be formulated to achieve a precipitation strengthened microstructure comprising a lath martensite matrix phase and a Cu precipitate phase. The iron-based alloy may have a Cu weight fraction and a nickel (Ni) weight fraction, and the Ni weight fraction may be less than the Cu weight fraction of the iron-based alloy.

The invention discloses an anisotropic bonded magnetic powder and a preparation method thereof. The anisotropic bonded magnetic powder has a general formula of R.sub.1R.sub.2TB, wherein R.sub.1 is a rare earth element containing Nd or PrNd, R.sub.2 is one or two of La and Ce, T is a transitional element, and B is boron. The preparation method includes the steps of smelting the master alloy to prepare ingot(s), preparing a rare earth hydride of formula R.sub.1TBH.sub.X, preparing a hydride diffusion source of formula R.sub.1R.sub.2TH.sub.X, mixing, heat treating, and high-vacuum dehydrogenating, to obtain the anisotropic bonded magnetic powder. The invention uses La and Ce hydrides as the diffusion source, can save cost, remove hydrogen from the diffusion source at a lower dehydrogenation temperature, avoid crystal grain growth at a high temperature, and ensure the quality of the product.