CN-116829281-B - Ni-based alloy powder for laminated molding, laminated molded article, and method for producing same

Abstract

The present invention provides a non cracking Ni based alloy powder for laminated forming, laminated forming material, and a manufacturing method for laminated forming material. A Ni based alloy powder for laminated forming, comprising 10.0% or more and 16.0% or less of Cr, 4.0% or more and 9.0% or less of Al, 1.0% or more and 6.0% or less of Mo, 0.5% or more and 4.0% or less of Nb, 0.5% or less of Ti, 0.5% or less of Zr, 0.06% or more and 0.4% or less of C, and 0.04% or less of B. The remaining portion contains Ni and inevitable impurities, and the Ni based alloy powder for laminated forming satisfies 150 ≤ 120Nb+650Zr+32Ti-385C ≤ 270.

Inventors

• AOTA KINYA
• KUWABARA TAKASUKE

Assignees

• 株式会社博迈立铖

Dates

Publication Date

20260505

Application Date

20220203

Priority Date

20210205

Claims (5)

1. 1. A Ni-based alloy powder for laminate molding, characterized by comprising in mass%: 10.0% to 16.0% Cr, 4.0% To 9.0% of Al, 1.0% To 6.0% of Mo, 0.5% To 4.0% of Nb, Less than 0.5% of Ti, Less than 0.5% of Zr, C in an amount of 0.06% to 0.4% inclusive and Less than 0.04% of B, The remainder contains Ni and unavoidable impurities, and The Ni-based alloy powder for lamination and shaping satisfies 150-120Nb+650Zr+32Ti-385C-270, and the symbol of each element directly represents the mass percent of each element.
2. 2. The Ni-based alloy powder for laminated molding according to claim 1, wherein Ti is 0.002% or more and 0.2% or less.
3. 3. A laminated article characterized by having a composition comprising, in mass%: 10.0% to 16.0% Cr, 4.0% To 9.0% of Al, 1.0% To 6.0% of Mo, 0.5% To 4.0% of Nb, Less than 0.5% of Ti, Less than 0.5% of Zr, C in an amount of 0.06% to 0.4% inclusive and Less than 0.04% of B, The remainder contains Ni and unavoidable impurities, and The composition satisfies 150-120Nb+650Zr+32Ti-385C-270, each element symbol directly represents the mass percent of each element, And the laminate has a structure including an element segregation portion between a dendrite and an adjacent dendrite, The dendrite has a width of 5 μm or less and the element segregation portion has a width of 200 nm or less when viewed in a cross-sectional structure.
4. 4. A laminated structure according to claim 3, wherein the element segregation is at least one of thicker than the dendrites Cr, mo, nb, zr.
5. 5. A method for producing a laminated shape article, the laminated shape article being formed by irradiating the Ni-based alloy powder for laminated shape according to claim 1 or 2 with an electron beam or a laser beam and melting and solidifying the same.

Description

Ni-based alloy powder for laminated molding, laminated molded article, and method for producing same Technical Field The present invention relates to a laminated molded article having excellent high-temperature strength characteristics, a method for producing the same, and a Ni-based alloy powder for laminated molding. Background For laminated shaped parts used at high temperatures for use in gas turbine engines for aircraft, gas turbines for power generation, and the like, a longer lifetime is required. For this requirement, a γ' (GAMMA PRIME) precipitation type Ni-based alloy such as 713C alloy is used. Gamma' refers to a precipitate mainly of Ni 3 (Al, ti). In addition, in order to cope with complex shapes, a method for producing a layered structure using a γ' precipitation type Ni-based alloy has been proposed. For example, patent document 1 discloses a lamination method for laminating a Ni-based alloy having 10% to 16% Cr, 4.5% to 7.5% Al, 2.8% to 6.2% Mo, 0.8% to 4% nb+ta, 0.01% to 2% Ti, 0.01% to 0.3% Zr, and 0.01% to 0.3% C, wherein when the layers are fully laminated and laser light is irradiated along a plurality of scanning lines parallel to each other, the scanning interval is divided by the laser light diameter to a value of 0.6 to 1.0. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2020-147782 Disclosure of Invention Problems to be solved by the invention The lamination method disclosed in patent document 1 is a method for obtaining a lamination product excellent in creep rupture characteristics at high temperature. However, the laminated shape of the γ' deposition type alloy has a problem that solidification cracking is likely to occur. If cracking occurs, there is a concern that high temperature creep characteristics may be reduced, and thus a laminated shape without cracking is required. Accordingly, an object of the present invention is to provide a Ni-based alloy powder for laminated molding, a laminated molded article, and a method for producing the laminated molded article, which are less likely to be broken. Technical means for solving the problems The present invention is a Ni-based alloy powder for laminated molding, which contains, in mass%, 10.0% or more and 16.0% or less of Cr, 4.0% or more and 9.0% or less of Al, 1.0% or more and 6.0% or less of Mo, 0.5% or more and 4.0% or less of Nb, 0.5% or less of Ti, 0.5% or less of Zr, 0.06% or more and 0.4% or less of C, and 0.04% or less of B, the balance including Ni and unavoidable impurities, and which satisfies the following (formula 1). 150+.120Nb+650 Zr+32Ti-385 C+.ltoreq.270. (1.) The Ti content is preferably 0.002% or more and 0.2% or less. The present invention is a laminated structure comprising, in mass%, 10.0% or more and 16.0% or less of Cr, 4.0% or more and 9.0% or less of Al, 1.0% or more and 6.0% or less of Mo, 0.5% or more and 4.0% or less of Nb, 0.5% or less of Ti, 0.5% or less of Zr, 0.06% or more and 0.4% or less of C, and 0.04% or less of B, the balance comprising Ni and unavoidable impurities, wherein the composition satisfies 150+.120Nb+650Zr+32Ti-385 C+.270. (formula 1), wherein the laminated structure has a structure comprising element segregation portions (element segregation parts μm or less between dendrites (dendritic) and adjacent dendrites, and wherein the dendrites have a width of 200nm or less in a cross-sectional structure. Here, the element segregation portion may be at least one of a thickening (concentration) of Cr, mo, nb, zr compared to the dendrite. The present invention also provides a method for producing a laminated molded article, wherein the laminated molded article is molded by irradiating the Ni-based alloy powder with an electron beam or a laser beam and solidifying the powder by melting. ADVANTAGEOUS EFFECTS OF INVENTION The present invention provides a Ni-based alloy powder for laminated modeling, a laminated modeling product, and a method for manufacturing the laminated modeling product, wherein cracking is less likely to occur. Drawings Fig. 1 is a diagram showing an example of occurrence of cracking of a laminate structure. Fig. 2 is a graph showing the relationship between the solid phase ratio and the temperature based on thermodynamic calculation. Fig. 3 is a perspective view illustrating a schematic structure of the laser lamination modeling method. Fig. 4 is a photograph of a structure of a laminate of the present invention in cross section along the lamination direction. Fig. 5 is a photograph of a structure of a cross section of a laminate of the present invention taken in a direction perpendicular to the lamination direction. Fig. 6 is a photograph of a structure showing dendrites and element segregation widths of a laminate using alloy powder B (example). Fig. 7 is a photograph of a structure showing dendrites and element segregation widths of a laminate using alloy powder C (comparative example). [ Description of symbols ] 1 Alloy powder