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KR-20260063003-A - Metal powder for additive manufacturing and additive body

KR20260063003AKR 20260063003 AKR20260063003 AKR 20260063003AKR-20260063003-A

Abstract

To form a stable powder bed for obtaining a high-density additively manufactured body with a relative density of 99% or more, a metal powder for additive manufacturing used to form an additively manufactured body by an additive manufacturing method is provided, wherein the metal powder has a sieve particle size (mass%) of -63 μm and +45 μm of 9% or more and a particle diameter D5 of 9 μm or more. An additively manufactured body formed by an additive manufacturing device using the metal powder for additive manufacturing has a relative density of 99.0% or more.

Inventors

  • 스기타니 유지
  • 오토베 카츠노리

Assignees

  • 후쿠다 킨조쿠 하쿠훈 코교 가부시키가이샤

Dates

Publication Date
20260507
Application Date
20241031
Priority Date
20231103

Claims (5)

  1. It is a metal powder for additive manufacturing that is used to form an additive body by an additive manufacturing method that forms a powder bed, and contains copper as a main component, The metal powder contains, as an additive element, at least one of Al in an amount of 0.01 mass% or more and 3.92 mass% or less, Si in an amount of 0.01 mass% or more and 0.97 mass% or less, P in an amount of 0.01 mass% or more and 0.14 mass% or less, Cr in an amount of 0.01 mass% or more and 1.33 mass% or less, Fe in an amount of 0.01 mass% or more and 0.29 mass% or less, Ni in an amount of 0.06 mass% or more and 4.08 mass% or less, Zr in an amount of 0.04 mass% or more and 0.31 mass% or less, Sn in an amount of 0.24 mass% or more and 5.09 mass% or less, Mg in an amount of 0.01 mass% or more and 0.21 mass% or less, and Zn in an amount of 0.01 mass% or more and 32.0 mass% or less, and the remainder is copper and unavoidable impurities. A metal powder for additive manufacturing having a sieve particle size (mass%) of -63 μm +45 μm of 9% or more and a particle diameter D5 of 9 μm or more.
  2. As a metal powder for additive manufacturing containing nickel as a main component, used to form an additive body by an additive manufacturing method that forms a powder bed, The above metal powder is a metal powder for additive manufacturing, containing at least one element selected from Al, Si, Ti, Cr, Mn, Fe, Co, Nb, and Mo as 50.88 mass% of the additive element N, with the remainder being nickel and unavoidable impurities, having a sieve particle size (mass%) of -63 μm +45 μm of 9% or more, and a particle size D5 of 9 μm or more.
  3. A metal powder for additive manufacturing according to claim 1 or 2, wherein the -63 μm +45 μm sieve particle size (mass%) is a value obtained by the sieve test method specified in JIS Z 8815:1994, and the particle diameter D5 is a value obtained by the laser diffraction method.
  4. An additively formed body formed by an additive manufacturing method in which a powder bed is formed using the metal powder for additive manufacturing described in claim 1, The metal powder contains, as an additive element, at least one of Al in an amount of 0.01 mass% or more and 3.92 mass% or less, Si in an amount of 0.01 mass% or more and 0.97 mass% or less, P in an amount of 0.01 mass% or more and 0.14 mass% or less, Cr in an amount of 0.01 mass% or more and 1.33 mass% or less, Fe in an amount of 0.01 mass% or more and 0.29 mass% or less, Ni in an amount of 0.06 mass% or more and 4.08 mass% or less, Zr in an amount of 0.04 mass% or more and 0.31 mass% or less, Sn in an amount of 0.24 mass% or more and 0.97 mass% or less, Mg in an amount of 0.01 mass% or more and 0.21 mass% or less, and Zn in an amount of 0.01 mass% or more and 32.0 mass% or less, and the remainder is copper and unavoidable impurities. A laminated body having a cross-sectional area ratio of 99.0% or more obtained by subtracting the porosity of the cross-section of the laminated body from 100.
  5. An additively formed body formed by an additive manufacturing method in which a powder bed is formed using the metal powder for additive manufacturing described in claim 2, The above metal powder contains at least one element selected from the elements Al, Si, Ti, Cr, Mn, Fe, Co, Nb, and Mo as 50.88 mass% of the additive element N, and the remainder is nickel and unavoidable impurities. A laminated body having a cross-sectional area ratio of 99.0% or more obtained by subtracting the porosity of the cross-section of the laminated body from 100.

Description

Metal powder for additive manufacturing and additive body The present invention relates to a metal powder for additive manufacturing and an additively manufactured body. In the above technical field, Patent Document 1 discloses that when performing additive manufacturing by forming a powder bed with metal powder having characteristics defined by an average particle size D50 and TD (tap density), an additively manufactured body with a relative density of 95% or more is obtained. [Prior Art Literature] [Patent Literature] Patent Document 1: Japanese Patent Publication No. 2021-017639 Figure 1 is a diagram showing the particle size distribution of average particle size D50, and the relationship between particle size D5 and -63 μm +45 μm sieve particle sizes (mass%) corresponding to the particle size distribution. FIG. 2 is a diagram showing the evaluation results of powder beds according to each example and comparative example. Figure 3 is a graph showing the relationship between the particle size D5 and the sieve particle size (mass%) of metal powder for additive manufacturing according to each example and comparative example, and -63 μm +45 μm. Figure 4 is a graph showing the particle size distribution in each region of Figure 3 with the value of particle diameter D5 on the horizontal axis. FIG. 5 is a drawing showing air leakage of a cylinder as a laminated body according to each embodiment and comparative example. Figure 6a is a table showing experimental results regarding the relationship between -63 μm +45 μm sieve particle size (mass%), particle diameter D5 (μm), quality and stability of powder bed formation, and relative density of the additive body in combinations of various metals and elements. Figure 6b is a table showing experimental results regarding the relationship between -63 μm +45 μm sieve particle size (mass%), particle diameter D5 (μm), quality and stability of powder bed formation, and relative density of the additive body in combinations of various metals and elements. Figure 7a is a table showing experimental results regarding the relationship between -63 μm +45 μm sieve particle size (mass%), particle diameter D5 (μm), quality and stability of powder bed formation, and relative density of the additive body in combinations of various metals and elements. Figure 7b is a table showing experimental results regarding the relationship between -63 μm +45 μm sieve particle size (mass%), particle diameter D5 (μm), quality and stability of powder bed formation, and relative density of the additive body in combinations of various metals and elements. Figure 8a is a table showing experimental results regarding the relationship between -63 μm +45 μm sieve particle size (mass%), particle diameter D5 (μm), quality and stability of powder bed formation, and relative density of the additive body in combinations of various metals and elements. Figure 8b is a table showing experimental results regarding the relationship between -63 μm +45 μm sieve particle size (mass%), particle diameter D5 (μm), quality and stability of powder bed formation, and relative density of the additive body in combinations of various metals and elements. Figure 9a is a table showing experimental results regarding the relationship between -63 μm +45 μm sieve particle size (mass%), particle diameter D5 (μm), quality and stability of powder bed formation, and relative density of the additive body in combinations of various metals and elements. Figure 9b is a table showing experimental results regarding the relationship between -63 μm +45 μm sieve particle size (mass%), particle diameter D5 (μm), quality and stability of powder bed formation, and relative density of the additive body in combinations of various metals and elements. Embodiments of the present invention are described in detail below with reference to the drawings. However, the relative arrangement of components, numerical formulas, and numerical values described in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. A copper alloy powder (an alloy powder having copper as a main constituent element) is described as the metal powder for additive manufacturing in this embodiment. Prior to that, the current status of copper alloy powders for additive manufacturing is first described. <Phenomenon of Metal Powder for Additive Manufacturing> Patent Document 1 discloses that when a powder bed is formed using metal powder having characteristics defined by an average particle size D50 and TD (tap density) and additive manufacturing is performed, an additively manufactured body with a relative density of 95% or more is obtained. However, the average particle size D50 represents the median of the particle size distribution of the powder. Therefore, as shown in the particle size distribution (110) illustrated in FIG. 1, even for powders having the same average particle size D50 value, a broad particle size distribution (111) in wh