Abstract: This invention provides a composite material that is durable in a hot environment and easily produced. The composite material according to the invention has an overlaid part comprising high-melting-point metal in at least a part on the surface of a low-melting-point alloy member having a melting point of 1600° C. or lower. The overlaid part comprising high-melting-point metal comprises high-melting-point metal particles comprising high-melting-point metal elements having a melting point of 2400° C. or higher scattered therein and comprises the high-melting-point metal elements that account for 50% by mass to 95% by mass thereof.

Abstract: The invention provides a cermet composite material that can improve a bond strength between a cermet part and a non-cermet part without heat treatment at high temperature. The cermet composite material according to the invention comprises a cermet part including hard carbides dispersed in a metallic phase and a non-cermet part consisting of a Ni-based alloy including 50% by mass or more of Ni with the cermet part being formed on the non-cermet part by additive manufacturing, wherein the cermet composite material comprises an intermediate layer including both components of the cermet part and components of the non-cermet part between the cermet part and the non-cermet part, and the non-cermet part consists of the Ni-based alloy including 3.0% by mass to 15.0% by mass of Ti or the Ni-based alloy including 0.5% by mass to less than 3.0% by mass of Ti and 4% by mass to 15% by mass of Nb and Ta in total.

Abstract: The present invention provides an alloy, an alloy powder, an alloy member, and a composite member which are excellent in corrosion resistance and wear resistance, have crack resistance, and are suitable for an additive manufacturing method and the like. An alloy and an alloy powder include, by mass %, Cr: 18 to 22%, Mo: 18 to 28%, Ta: 1.5 to 57%, C: 1.0 to 2.5%, Nb: 0 to 42%, Ti: 0 to 15%, V: 0 to 27%, Zr: 0 to 29%, and a remainder consisting of Ni and unavoidable impurities, where a molar ratio of (Ta+0.7Nb+Ti+0.6V+Zr)/C=0.5 to 1.5 is satisfied. An alloy member is an additively manufactured product or a cast having such a solidification structure, and the solidification structure is a dendrite-like crystal structure having a metal phase having a face-centered cubic structure and carbides.

Abstract: Provided are a WC-based cemented carbide powder from which a WC-based cemented carbide member excellent in high thermal conductivity and high abrasion resistance can be manufactured, a WC-based cemented carbide member, and a manufacturing method for a WC-based cemented carbide member. The WC-based cemented carbide powder of the present invention includes WC, Cu, and at least one of Co, Fe, and Cr. The content of WC is equal to or more than 40 mass %, the content of at least one of Co, Fe, and Cr is equal to or more than 25 mass % and less than 60 mass %, and the ratio a/b of the content ‘a’ of Cu and the content ‘b’ of at least one of Co, Fe, and Cr satisfies 0.070?a/b?1.000.

Abstract: A member includes a first metallic region made of a first material; a second metallic region made of a second material that is a different from the first material; and a mix region made of mixture of the first and second materials between the first and second metallic region. In a cross-sectional view, an interface between the first metallic region and the mix region is represented by a line having a first curved line protruding toward the first metallic region and a second curved line protruding toward the first metallic region, and an angle at a cross point of the first and second curved lines, the angle being made by a tangent line of the first curved line and a tangent line of the second curved line in a region of the first metallic region, is equal to or larger than 70 degrees and smaller than 180 degrees.

Abstract: The present invention provides an alloy, an alloy powder, an alloy member, and a composite member which are excellent in corrosion resistance and wear resistance, have crack resistance, and are suitable for an additive manufacturing method and the like. An alloy and an alloy powder include, by mass %, Cr: 18 to 22%, Mo: 18 to 28%, Ta: 1.5 to 57%, C: 1.0 to 2.5%, Nb: 0 to 42%, Ti: 0 to 15%, V: 0 to 27%, Zr: 0 to 29%, and a remainder consisting of Ni and unavoidable impurities, where a molar ratio of (Ta+0.7Nb+Ti+0.6V+Zr)/C=0.5 to 1.5 is satisfied. An alloy member is an additively manufactured product or a cast having such a solidification structure, and the solidification structure is a dendrite-like crystal structure having a metal phase having a face-centered cubic structure and carbides.

Abstract: An object is to provide an alloy composition that has a sufficient melting point for casting of an aluminum alloy, also has high hardness, and can suppress an occurrence of galling. The alloy composition of the present invention includes: a Mo—Cr-based dendritic structure 3; and a Ni—Al-based interdendritic structure 5 that fills a periphery of the Mo—Cr-based dendritic structure 3. The alloy composition of the present invention can adopt a chemical composition I in which when Mo+Cr+Ni+Al=100 at. % holds, Ni+Al=15 to 50 at. % and Mo+Cr=50 to 85 at. % hold; or a chemical composition II in which Ni+Al=40 to 70 at. % and Mo+Cr=30 to 60 at. % hold.

Abstract: The present invention provides an alloy, an alloy powder, an alloy member, and a composite member which are excellent in corrosion resistance and wear resistance, have crack resistance, and are suitable for an additive manufacturing method and the like. An alloy and an alloy powder include, by mass %, Cr: 18 to 22%, Mo: 18 to 28%, Ta: 1.5 to 57%, C: 1.0 to 2.5%, Nb: 0 to 42%, Ti: 0 to 15%, V: 0 to 27%, Zr: 0 to 29%, and a remainder consisting of Ni and unavoidable impurities, where a molar ratio of (Ta+0.7Nb+Ti+0.6V+Zr)/C=0.5 to 1.5 is satisfied. An alloy member is an additively manufactured product or a cast having such a solidification structure, and the solidification structure is a dendrite-like crystal structure having a metal phase having a face-centered cubic structure and carbides.

Abstract: Provided are a Ni-based alloy capable of being melted and solidified and excellent in corrosion resistance and abrasion resistance, a Ni-based alloy powder, a Ni-based alloy member, and a product including a Ni-based alloy member. The Ni-based alloy excellent in corrosion resistance and abrasion resistance includes, by mass %: Cr: 8.5% to 23.0%; Mo: 8.5% to 27.0%; Ta: 0.5% to 2.5%; W: 15.0 to 51.0%; and C: 1.0 to 3.5%, the balance being Ni and unavoidable impurities, in which the mass ratios Ni:Cr:Mo of Ni, Cr and Mo are 2.5 to 3.5:1:1.0 to 1.5.

Abstract: Provided is an alloy material in which coarse growth or aggregation and precipitation of an undesired intermetallic compound phase can be suppressed, an alloy product formed of the alloy material, and a mechanical device including the alloy product. The alloy material according to the present invention includes: 5 at % or more and 40 at % or less of each of Co, Cr, Fe, and Ni; more than 0 at % and 8 at % or less of Mo; 1 at % or more and less than 8 at % of Ti; more than 0 at % and 4 at % or less of at least one kind of Ta or Nb; and a remainder consisting of unavoidable impurities, in which a total content of Ti and the at least one kind of Ta or Nb is 3 at % or more and 8 at % or less. In the alloy product formed of the alloy material, a total occupancy of ? phase and Laves phase precipitates having a size of 1 ?m or more is suppressed to be 5 area % or less.

Abstract: The present disclosure provides a powder material that makes it possible to achieve higher flowability than before and to increase the crushing strength of particles. The powder material of the present disclosure has a dendritic structure 1. The dendritic structure 1 has a cemented carbide composition or a cermet composition.

Abstract: An alloy having resistance to an aluminum alloy or the like in a molten state. An alloy includes Nb and Mo as a first element group, and at least two elements selected from Ta, W, Ti, Hf and Zr, as a second element group, wherein when the total of the first element group and the second element group is 100 at. %, a content range of each of the elements contained is 5 to 35 at. %; and has such a resistance with respect to at least one of Al, Cu and Zn that a lattice mismatch therewith is 13% or more, and a migration barrier energy of dislocation is 310 kJ/mol or more.

Abstract: The present invention provides an alloy, an alloy powder, an alloy member, and a composite member which are excellent in corrosion resistance and wear resistance, have crack resistance, and are suitable for an additive manufacturing method and the like. An alloy and an alloy powder include, by mass %, Cr: 18 to 22%, Mo: 18 to 28%, Ta: 1.5 to 57%, C: 1.0 to 2.5%, Nb: 0 to 42%, Ti: 0 to 15%, V: 0 to 27%, Zr: 0 to 29%, and a remainder consisting of Ni and unavoidable impurities, where a molar ratio of (Ta+0.7Nb+Ti+0.6V+Zr)/C=0.5 to 1.5 is satisfied. An alloy member is an additively manufactured product or a cast having such a solidification structure, and the solidification structure is a dendrite-like crystal structure having a metal phase having a face-centered cubic structure and carbides.

Abstract: Provided are: an alloy member that is excellent in homogeneity of both the alloy composition and microstructure and excellent in shape controllability and includes a high entropy alloy having high mechanical properties and high corrosion resistance, a process for producing the same, and a product including the alloy member. In the present invention, the alloy member having a chemical composition comprising elements of Co, Cr, Fe, Ni, and Ti each in an amount within a range of 5 atomic % or more and 35 atomic % or less and Mo in an amount within a range of more than 0 atomic % and 8 atomic % or less, the reminder consisting of unavoidable impurities, wherein ultrafine grains having an average grain diameter of 100 nm or less are dispersed and precipitated in a parent phase crystal.

Abstract: Provided are a Ni—Cr—Mo-based alloy, a Ni—Cr—Mo-based alloy powder, a Ni—Cr—Mo-based alloy member, and a member that can be melted and solidified and have excellent corrosion resistance, wear resistance, and crack resistance. A Ni—Cr—Mo-based alloy member according to the present invention includes, by mass %, Cr: 18% to 22%, Mo: 18% to 39%, Ta: 1.5% to 2.5%, B: 1.0% to 2.5%, and a remainder consisting of Ni and unavoidable impurities, where 25 Cr+(Mo/2B)<38 is satisfied, in which boride particles with a maximum particle size of 70 ?m or less are dispersed and precipitated in a parent phase.

Abstract: Provided are a WC-based cemented carbide powder from which a WC-based cemented carbide member excellent in high thermal conductivity and high abrasion resistance can be manufactured, a WC-based cemented carbide member, and a manufacturing method for a WC-based cemented carbide member. The WC-based cemented carbide powder of the present invention includes WC, Cu, and at least one of Co, Fe, and Cr. The content of WC is equal to or more than 40 mass %, the content of at least one of Co, Fe, and Cr is equal to or more than 25 mass % and less than 60 mass %, and the ratio a/b of the content ‘a’ of Cu and the content ‘b’ of at least one of Co, Fe, and Cr satisfies 0.070?a/b?1.000.

Abstract: Provided are a Ni-based alloy capable of being melted and solidified and excellent in corrosion resistance and abrasion resistance, a Ni-based alloy powder, a Ni-based alloy member, and a product including a Ni-based alloy member. The Ni-based alloy excellent in corrosion resistance and abrasion resistance includes, by mass %: Cr: 8.5% to 23.0%; Mo: 8.5% to 27.0%; Ta: 0.5% to 2.5%; W: 15.0 to 51.0%; and C: 1.0 to 3.5%, the balance being Ni and unavoidable impurities, in which the mass ratios Ni:Cr:Mo of Ni, Cr and Mo are 2.5 to 3.5:1:1.0 to 1.5.

Abstract: An object is to provide an alloy composition that has a sufficient melting point for casting of an aluminum alloy, also has high hardness, and can suppress an occurrence of galling. The alloy composition of the present invention includes: a Mo—Cr-based dendritic structure 3; and a Ni—Al-based interdendritic structure 5 that fills a periphery of the Mo—Cr-based dendritic structure 3. The alloy composition of the present invention can adopt a chemical composition I in which when Mo+Cr+Ni+Al=100 at. % holds, Ni+Al=15 to 50 at. % and Mo+Cr=50 to 85 at. % hold; or a chemical composition II in which Ni+Al=40 to 70 at. % and Mo+Cr=30 to 60 at. % hold.

Abstract: Intended is to improve the corrosion resistance of an overlay used in a nuclear power plant, and to reduce dissolution of cobalt from an overlay. The corrosion and wear resistant overlay 7 is formed along a surface of a base 2 by laser lamination modeling, and is configured from a plurality of metal layers 1a, 1b, 1c, and 1d of a Co-base alloy. The thickness of carbide eutectics that precipitate in the metal layers 1a, 1b, 1c, and 1d is the largest in the metal layer 1a closest to the base 2, and is gradually smaller in the metal layers 1b, 1c, and 1d farther away from the base 2. The intensity of the laser beam applied to form layers by laser lamination modeling is adjusted so that the carbide eutectics that precipitate in at least the outermost metal layer 1d have a controlled size of 10 ?m or less.

Abstract: A member includes a first metallic region made of a first material; a second metallic region made of a second material that is a different from the first material; and a mix region made of mixture of the first and second materials between the first and second metallic region. In a cross-sectional view, an interface between the first metallic region and the mix region is represented by a line having a first curved line protruding toward the first metallic region and a second curved line protruding toward the first metallic region, and an angle at a cross point of the first and second curved lines, the angle being made by a tangent line of the first curved line and a tangent fine of the second curved line in a region of the first metallic region, is equal to or larger than 70 degrees and smaller than 180 degrees.