Abstract: A heat treatment method for an additive manufactured object formed of a laminate-molded Ni-base alloy includes: a heat treatment step for carbide precipitation optimization of heating the additive manufactured object for 1 hour or longer and 100 hours or shorter at a temperature which is equal to or higher than a temperature T1 determined by Formula (1) according to amounts of component elements and is equal to or lower than 1,350° C.; and an aging treatment step of heating the additive manufactured object for 1 to 30 hours at a temperature of 800° C. to 950° C. after the heat treatment step for carbide precipitation optimization. T1 (° C.

Abstract: An alloy powder for additive manufacturing according to an embodiment is composed of a nickel-based alloy and comprises: 0.0 mass % or more and less than 4.0 mass % of cobalt; 12 mass % or more and 25 mass % or less of chromium; 1.0 mass % or more and 5.5 mass % or less of aluminum; 0.0 mass % or more and 4.0 mass % or less of titanium; 0.0 mass % or more and 3.0 mass % or less of tantalum; and less than 1.5 mass % of niobium.

Abstract: Provided is a high-strength, heat-resistant, Ni-base alloy comprising Co: from 5 to 12%, Cr: from 5 to 12%, Mo: from 0.5 to 3.0%, W: from 3.0 to 6.0%, Al: from 5.5 to 7.2%, Ti: from 1.0 to 3.0%, Ta: from 1.5 to 6.0%, Re: from 0 to 2.0%, and C: from 0.01 to 0.20%. The high-strength, heat-resistant, Ni-base alloy is constituted of a Ni-based alloy, the balance of the Ni-based alloy comprising Ni and inevitable impurities. The density of the high-strength, heat-resistant Ni-base alloy is less than 8.5 g/cm3.

Abstract: A method of manufacturing a turbine blade includes a brazing treatment for joining a brazing material to a base material of a turbine blade by heating the base material having the brazing material arranged thereon and melting the brazing material, a stabilizing treatment for heating the base material having been subjected to the brazing treatment; and an aging treatment for heating the base material having been subjected to the stabilizing treatment. The brazing treatment and the stabilizing treatment are performed with a sequential heating treatment.

Abstract: In a casting device, positions of discharge ends discharging cooling gas, of respective gas supply nozzles are adjusted in response to movement of a mold. This makes it possible to stably achieve high cooling performance for the mold by blowing of the cooling gas. To adjust the positions of the respective discharge ends, the gas supply nozzles are advanced or retreated, or are expanded or contracted. Further, a cooling chamber may include a radiation cooling portion that cools the mold by radiation, and the radiation cooling portion is disposed below the gas supply nozzles that are provided directly below a heat shielding body partitioning a heating chamber and the cooling chamber.

Abstract: In a casting device, when a mold varied in outer size depending on a position passes through a heat shielding portion between a heating chamber and a cooling chamber, a flexible portion of a heat shielding body is bent to fit the outer size of the mold.

Abstract: A heat treatment method for an additive manufactured object formed of a laminate-molded Ni-base alloy includes: a heat treatment step for carbide precipitation optimization of heating the additive manufactured object for 1 hour or longer and 100 hours or shorter at a temperature which is equal to or higher than a temperature T1 determined by Formula (1) according to amounts of component elements and is equal to or lower than 1,350° C.; and an aging treatment step of heating the additive manufactured object for 1 to 30 hours at a temperature of 800° C. to 950° C. after the heat treatment step for carbide precipitation optimization. T1 (° C.

Abstract: Provided is a high-strength, heat-resistant, Ni-base alloy comprising Co: from 5 to 12%, Cr: from 5 to 12%, Mo: from 0.5 to 3.0%, W: from 3.0 to 6.0%, Al: from 5.5 to 7.2%, Ti: from 1.0 to 3.0%, Ta: from 1.5 to 6.0%, Re: from 0 to 2.0%, and C: from 0.01 to 0.20%. The high-strength, heat-resistant, Ni-base alloy is constituted of a Ni-based alloy, the balance of the Ni-based alloy comprising Ni and inevitable impurities. The density of the high-strength, heat-resistant Ni-base alloy is less than 8.5 g/cm3.

Abstract: A method of heat-treating for a metal molded article includes: a shape holding layer formation step of forming on a shape holding layer having a melting point higher than a solidus temperature Ts of a composition of the metal molded article on a surface of the metal molded article by treating the metal molded article; and a first heat-treatment step of performing a first heat treatment on the metal molded article at a first temperature T1, after forming the shape holding layer. When a reference temperature Ta is a temperature lower than the solidus temperature Ts by 100° C., and Tm is the melting point of the shape holding layer, the shape holding layer formation step and the first heat-treatment step are performed so as to satisfy an expression Ta?T1?Tm.

Abstract: Provided is a method for manufacturing a metal molded article capable of suppressing leaching of a molten liquid that may be created due to heat treatment of a metal member, from the metal member. The method for manufacturing a metal molded article includes the steps of: applying a ceramic coating to a metal member; and performing heat treatment of the metal member to which the ceramic coating has been applied.

Abstract: A method for producing a turbine blade includes forming an undercoat on a surface of a base material of a turbine blade, which is formed of a Ni-based alloy material, the undercoat being formed of a metallic material having a higher oxidation-resisting property than that of the base material, performing diffusing treatment for heating the base material having the undercoat formed thereon and diffusing a part of the undercoat on the base material side, and forming a topcoat on a surface of the undercoat after the diffusing treatment is performed, the topcoat being formed of a material having a lower thermal conductivity than that of the base material and the undercoat.

Abstract: A method for producing a turbine blade includes performing brazing treatment, performing annealing, and subjecting a base material to solutionizing treatment. In the brazing treatment, a brazing material is welded to be joined to the base material of a turbine blade by operating a heater to perform heating at a first temperature under a state in which the base material having the brazing material arranged thereon is placed in a predetermined heating furnace including the heater. In annealing, the base material is cooled by stopping the heater and lowering a furnace internal temperature after the brazing treatment. In the solutionizing treatment, ductility of the base material is improved through heating at a second temperature lower than the first temperature after the annealing.

Abstract: A method of manufacturing a turbine blade includes brazing treatment for joining a brazing material to a base material of a turbine blade by heating the base material having the brazing material arranged thereon and melting the brazing material, stabilizing treatment for heating the base material having been subjected to the brazing treatment; and aging treatment for heating the base material having been subjected to the stabilizing treatment. The brazing treatment and the stabilizing treatment are performed with one heating treatment.

Abstract: In the casting device according to the present invention, when a mold varied in outer size depending on a position passes through a heat shielding portion between a heating chamber and a cooling chamber, a flexible portion of a heat shielding body is bent to fit an outer size of the mold. Accordingly, it is possible to minimize a gap between a wall surface of the mold and the heat shielding body and to effectively perform heat shield between the heating chamber and the cooling chamber. This prevents deterioration of cooling performance inside the cooling chamber to improve temperature gradient of a casting. As a result, it is possible to improve strength of a produced casting. Further, it is possible to reduce an amount of energy wastefully emitted to the cooling chamber, of energy emitted from a heater. This makes it possible to improve energy efficiency.

Abstract: In a casting device of the present invention, positions of discharge ends discharging cooling gas, of respective gas supply nozzles are adjusted in response to movement of a mold. This makes it possible to stably achieve high cooling performance for the mold by blowing of the cooling gas. To adjust the positions of the respective discharge ends, the gas supply nozzles are advanced or retreated, or are expanded or contracted. Further, a cooling chamber may include a radiation cooling portion that cools the mold by radiation, and the radiation cooling portion is disposed below the gas supply nozzles that are provided directly below a heat shielding body partitioning a heating chamber and the cooling chamber.

Abstract: A Ni-based alloy comprises nitrides, of which an estimated largest size is an area-equivalent diameter of 12 ?m to 25 ?m, the estimated largest size of the nitrides being determined by calculating an area-equivalent diameter D which is defined as D=A1/2 in relation to an area A of a nitride with a largest size among nitrides present in a measurement field of view area S0 of an observation of the Ni-based alloy, repeatedly performing this operation for n times corresponding to a measurement field of view number n to acquire n pieces of data of the area-equivalent diameter D, arranging the pieces of data of area-equivalent diameter D in ascending order into D1, D2, . . .

Abstract: Provided is a high-strength, heat-resistant, Ni-base alloy comprising Co: from 5 to 12%, Cr: from 5 to 12%, Mo: from 0.5 to 3.0%, W: from 3.0 to 6.0%, Al: from 5.5 to 7.2%, Ti: from 1.0 to 3.0%, Ta: from 1.5 to 6.0%, Re: from 0 to 2.0%, and C: from 0.01 to 0.20%. The high-strength, heat-resistant, Ni-base alloy is constituted of a Ni-based alloy, the balance of the Ni-based alloy comprising Ni and inevitable impurities. The density of the high-strength, heat-resistant Ni-base alloy is less than 8.5 g/cm3.

Abstract: Provided is a Ni-based single crystal superalloy containing 6% by mass or more and 12% by mass or less of Cr, 0.4% by mass or more and 3.0% by mass or less of Mo, 6% by mass or more and 10% by mass or less of W, 4.0% by mass or more and 6.5% by mass or less of Al, 0% by mass or more and 1% by mass or less of Nb, 8% by mass or more and 12% by mass or less of Ta, 0% by mass or more and 0.15% by mass or less of Hf, 0.01% by mass or more and 0.2% by mass or less of Si, and 0% by mass or more and 0.04% by mass or less of Zr, and optionally containing at least one element selected from B, C, Y, La, Ce, and V, with a balance being Ni and inevitable impurities.

Abstract: A Ni-based alloy comprises nitrides, of which an estimated largest size is an area-equivalent diameter of 12 ?m to 25 ?m, the estimated largest size of the nitrides being determined by calculating an area-equivalent diameter D which is defined as D=A1/2 in relation to an area A of a nitride with a largest size among nitrides present in a measurement field of view area S0 of an observation of the Ni-based alloy, repeatedly performing this operation for n times corresponding to a measurement field of view number n to acquire n pieces of data of the area-equivalent diameter D, arranging the pieces of data of area-equivalent diameter D in ascending order into D1, D2, . . .

Abstract: A process including brazing a first plate-like member formed from a heat-resistant alloy, and a second plate-like member formed from a heat-resistant alloy and having fins on the surface, with the fins facing the first plate-like member, by interposing a brazing filler metal comprising a melting point lowering element between the two plate-like members, molding the plate-like assembly to form a combustor structural member, identifying, in accordance with the shape of the combustor structural member, strain locations where the strain generated during the press molding step exceeds a predetermined value, performing localized heating of the locations within the plate-like assembly corresponding with the strain locations identified, and as the above press molding step subjecting the plate-like assembly to cold press molding with the temperature of the heated locations corresponding with the strain locations maintained at a desired temperature.