Abstract: An austenitic non-magnetic steel containing: 8.0 to 15.0 mass % of Mn; 0.05 to 0.50 mass % of N; 0.20 to 1.00 mass % of C; 2.0 to 15.0 mass % of Cr; and 3.0 mass % or less of V, and a powder metal material for additive manufacturing, which is an austenitic non-magnetic steel containing: 8.0 to 15.0 mass % of Mn; 0.20 to 1.00 mass % of C; 2.0 to 15.0 mass % of Cr; and 3.0 mass % or less of V.

Abstract: A powder metal material for additive manufacturing contains: (A) a non-magnetic steel powder which is free of nitrogen; and (B) a ferrovanadium nitride powder, and a particle size of the component (B) is 15.0 ?m?D50?25.0 ?m in terms of volume average particle size, and a content of the component (B) is 0.3 mass % to 3.0 mass % with respect to a total amount of the powder metal material.

Abstract: An iron alloy manufacturing method which can suppress occurrence of distortion and crack in formed iron alloy layers is provided. During execution of a forming step, in a first temperature control step, an iron alloy layer temperature T1 of a predetermined number of laminated layers from a surface layer of iron alloy layers formed in the forming step is controlled to be kept within a range of Ms?T1?Ms+?, and in a second temperature control step, a base plate temperature T2 is controlled to be kept within a range of Mf???T2?Mf.

Abstract: A powder metal material for additive manufacturing contains: (A) a non-magnetic steel powder which is free of nitrogen; and (B) at least one powder selected from a chromium nitride powder and a ferrochromium nitride powder, a particle size of the component (B) is 10.0 ?m?D50?25.0 ?m in terms of volume average particle size, and a content of the component (B) is 0.1 mass % to 3.5 mass % with respect to a total amount of the powder metal material.

Abstract: Provided is a heat exchanger in which first flow paths for flowing a first fluid and second flow paths for flowing a second fluid are arranged adjacent via a partition wall through which heat exchange is performed. The partition wall includes parallel tubular partition walls inside of which is the first flow paths. At least a part of the tubular partition walls in a flow path direction are integrally coupled to form a partition wall coupling portion having a geometric pattern in transverse cross section. An element figure of the geometric pattern corresponding to a transverse cross-sectional shape of the tubular partition wall is connected to each other at a vertex, and the number of sides of the element figure gathering at the vertex is an even number. In the partition wall coupling portion, the second flow paths are defined between outer peripheral surfaces of the surrounding tubular partition walls.

Abstract: A powder metal material in order to be used in additive manufacturing, in which the powder metal material is an aluminum alloy, and the aluminum alloy contains at least one metal atom having a smaller atomic radius than that of aluminum and having a higher electron density than that of aluminum.

Abstract: A powder metal material for additive manufacturing contains: (A) a non-magnetic steel powder which is free of nitrogen; and (B) a ferrovanadium nitride powder, and a particle size of the component (B) is 15.0 ?m?D50?25.0 ?m in terms of volume average particle size, and a content of the component (B) is 0.3 mass % to 3.0 mass % with respect to a total amount of the powder metal material.

Abstract: A steel material for additive manufacturing containing: 0.3 to 0.8 mass % of C; 0.6 to 2 mass % of Mn; 1 to 7 mass % of Cr; 2 mass % or less of V; and 3 mass % or less of Mo, in which a martensite transformation start temperature is 130° C. to 200° C., and a bainite transformation start time at the martensite transformation start temperature+30° C. in an isothermal transformation curve is 200 seconds or longer.

Abstract: A powder metal material for additive manufacturing contains: (A) a non-magnetic steel powder which is free of nitrogen; and (B) at least one powder selected from a chromium nitride powder and a ferrochromium nitride powder, a particle size of the component (B) is 10.0 ?m?D50?25.0 ?m in terms of volume average particle size, and a content of the component (B) is 0.1 mass % to 3.5 mass % with respect to a total amount of the powder metal material.

Abstract: A powder metal material in order to being used in additive manufacturing, in which the powder metal material is an aluminum alloy, and the aluminum alloy contains at least one selected from the group consisting of Ti, Zr, and P, and the additive manufacturing is additive manufacturing using a 3D printer.

Abstract: An austenitic non-magnetic steel containing: 8.0 to 15.0 mass % of Mn; 0.05 to 0.50 mass % of N; 0.20 to 1.00 mass % of C; 2.0 to 15.0 mass % of Cr; and 3.0 mass % or less of V, and a powder metal material for additive manufacturing, which is an austenitic non-magnetic steel containing: 8.0 to 15.0 mass % of Mn; 0.20 to 1.00 mass % of C; 2.0 to 15.0 mass % of Cr; and 3.0 mass % or less of V.

Abstract: A powder metal material for additive manufacturing contains: (A) a non-magnetic steel powder which is free of nitrogen; and (B) a ferromanganese nitride powder, a particle size of the component (B) is 15.0 ?m?D50?25.0 ?m in terms of volume average particle size, and a content of the component (B) is 0.4 mass % to 4.0 mass % with respect to a total amount of the powder metal material.

Abstract: A powder metal material for additive manufacturing, which is an aluminum alloy, in which the powder metal material has an absorption rate of 65% or more determined by the following regression equation: Absorption rate (%)=23.5+1.9[Si]+7.4[Fe]?4.0[Cu]+109.6[Mn]+45.1[Mg]?14.5[Zn]?14.2[Ti]+2.6[Ni]?3.0[Zr]?218.1[Sc], where, [ ]represents a content (mass %) of each element.

Abstract: The present disclosure provides an aluminum alloy to be used in laminate molding containing Si, Fe, Mn and inevitable impurities, in which ?-phase Al—Si—Fe intermetallic compound is present in the aluminum alloy. In addition, a manufacturing method of a laminated molding is provided which laminate molds using powder of this aluminum alloy. Further, a laminate molding of this aluminum alloy is provided.

Abstract: The present disclosure provides an aluminum alloy to be used in laminate molding containing Si, Fe, Mn and inevitable impurities, in which ?-phase Al—Si—Fe intermetallic compound is present in the aluminum alloy. In addition, a manufacturing method of a laminated molding is provided which laminate molds using powder of this aluminum alloy. Further, a laminate molding of this aluminum alloy is provided.

Abstract: An iron alloy manufacturing method which can suppress occurrence of distortion and crack in formed iron alloy layers is provided. During execution of a forming step, in a first temperature control step, an iron alloy layer temperature T1 of a predetermined number of laminated layers from a surface layer of iron alloy layers formed in the forming step is controlled to be kept within a range of Ms?T1?Ms+?, and in a second temperature control step, a base plate temperature T2 is controlled to be kept within a range of Mf???T2?Mf.

Abstract: Provided is a heat exchanger in which first flow paths for flowing a first fluid and second flow paths for flowing a second fluid are arranged adjacent via a partition wall through which heat exchange is performed. The partition wall includes parallel tubular partition walls inside of which is the first flow paths. At least a part of the tubular partition walls in a flow path direction are integrally coupled to form a partition wall coupling portion having a geometric pattern in transverse cross section. An element figure of the geometric pattern corresponding to a transverse cross-sectional shape of the tubular partition wall is connected to each other at a vertex, and the number of sides of the element figure gathering at the vertex is an even number. In the partition wall coupling portion, the second flow paths are defined between outer peripheral surfaces of the surrounding tubular partition walls.

Abstract: A refractory magnesium alloy includes magnesium as a principal ingredient, and an element having a radius 9–14% larger than a magnesium atom and a maximum concentration of 2 mass % or larger in a solid solution with magnesium is mixed in an amount not exceeding a maximum amount that can be homogeneously mixed in the solid solution with magnesium, whereby internal strength of grains thereof is enhanced. Alternatively, gadolinium with a content thereof ranging from 0.5 to 3.8 mass % is added, so that remaining part other than the gadolinium is composed of the magnesium and unavoidable impurities. This magnesium alloy serves to inhibit decrease in proof stress and creep deformation, especially primary creep deformation when used at high temperatures, typically at 200° C. The magnesium alloy may be employed for a structural material for a vehicle, so that a lightweight and heat-resistant structural material can be obtained.

Abstract: A refractory magnesium alloy includes magnesium as a principal ingredient, and an element having a radius 9-14% larger than a magnesium atom and a maximum concentration of 2 mass % or larger in a solid solution with magnesium is mixed in an amount not exceeding a maximum amount that can be homogeneously mixed in the solid solution with magnesium, whereby internal strength of grains thereof is enhanced. Alternatively, gadolinium with a content thereof ranging from 0.5 to 3.8 mass % is added, so that remaining part other than the gadolinium is composed of the magnesium and unavoidable impurities. This magnesium alloy serves to inhibit decrease in proof stress and creep deformation, especially primary creep deformation when used at high temperatures, typically at 200° C. The magnesium alloy may be employed for a structural material for a vehicle, so that a lightweight and heat-resistant structural material can be obtained.

Abstract: A thixocast casting material is formed of an Fe—C—Si based alloy in which an angle endothermic section due to the melting of a eutectic crystal exists in a latent heat distribution curve and has a eutectic crystal amount Ec in a range of 10% by weight<Ec<50% by weight. This composition comprises 1.8% by weight≦C≦2.5% by weight of carbon, 1.4% by weight≦Si≦3% by weight if silicon and a balance of Fe including inevitable impurities.