Additively manufactured body made of nicrmo-based alloy

Abstract

Provided is an additively manufactured body in which an NiCrMo-based alloy is used, and in which both corrosion resistance and high hardness are achieved. This additively manufactured body comprises an NiCrMo-based alloy containing a P-phase in a constituent phase formed by additive manufacturing using an NiCrMo-based alloy powder containing, by mass, 17.0-25.0% of Cr, 13.0-22.0% of Mo, 0-3.0% of Al, and 0-3.0% of Nb, wherein the balance includes Ni and unavoidable impurities.

Description

Additive manufacturing body made of NiCrMo alloy

[0001] The present invention relates to an additively manufactured object made of a NiCrMo-based alloy manufactured by a three-dimensional additive manufacturing method, which is a rapid melting, rapid cooling and solidification process.

[0002] In applications requiring corrosion resistance, Ni-based alloys, Co-based alloys, etc. have been used up until now. In recent years, the required properties have increased in order to be able to adapt to more severe environments.

[0003] Therefore, Patent Document 1 (Japanese Patent No. 4816950) proposes a NiCrMo-based alloy in which intermetallic compounds are dispersed in a matrix primarily composed of Ni. The alloy contains, in mass %, more than 18% and less than 21% Cr, more than 18% and less than 21% Mo, more than 1% and less than 3.4% Ta, 0.001 to 0.05% Mg, 0.001 to 0.04% N, 0.05 to 0.5% Mn, 0.01 to 2% Fe, 0.01 to 0.1% Si, 0.01 to 0.5% Al, 0.01 to less than 0.1% Cu, and 0.001 to less than 0.1% V, with the balance being Ni and unavoidable impurities, with the amount of C contained as an unavoidable impurity being 0.05% or less. However, since the amounts of components that can contribute to corrosion resistance in the matrix tend to be insufficient, the corrosion resistance of this alloy cannot be said to be sufficient.

[0004] Patent Document 2 (Japanese Patent No. 7406329) proposes a method for producing a compact by HIP molding a NiCrMo-based alloy powder containing, by mass%, 18.0 to 28.0% Cr, 10.0 to 25.0% Mo, and 1.0 to 3.0% Al, with a total ratio of Cr and Mo of 25 to 50%, at 1200°C, followed by solution treatment. However, the compact disclosed in this document is a sintered body produced by HIP, not an additively manufactured body, and therefore has a different structure from additively manufactured bodies that involve rapid solidification through rapid cooling.

[0005] As another Ni-based alloy, Patent Document 3 (Japanese Patent No. 7323010) proposes Ni-18.9Mo-19.3Cr-1.69Ta in mass %. This document states that by aging treatment, the Ni of the intermetallic compound ２It is described that precipitation hardening occurs due to the nano-sized precipitation of (Cr, Mo).

[0006] Patent No. 4816950 Patent No. 7406329 Patent No. 7323010

[0007] An object of the present invention is to provide an additive manufacturing product using a NiCrMo-based alloy that has both corrosion resistance and high hardness.

[0008] The inventors have now discovered that by controlling the heat treatment conditions of an additive manufacturing body made of a NiCrMo-based alloy, it is possible to obtain an additive manufacturing body of a NiCrMo-based alloy containing a fine P phase as a constituent phase. ９ Mo ２１ Ni ２０ This refers to the following.

[0009] The present disclosure provides the following aspects: [Aspect 1] An additively manufactured body made of a NiCrMo-based alloy containing a P phase among its constituent phases. [Aspect 2] The additively manufactured body according to Aspect 1, wherein the P phase has a major axis of 1000 nm or less. [Aspect 3] An additively manufactured body having an area of ​​1 μm ２The layered manufactured body according to Aspect 1, wherein the area ratio of the coarse Mo compound phase is 7% or less. [Aspect 4] The layered manufactured body according to any one of Aspects 1 to 3, which is an layered manufactured body produced by layering using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, and 0 to 3.0% Nb, with the balance being Ni and unavoidable impurities. [Aspect 5] The layered manufactured body according to any one of Aspects 1 to 3, which is an layered manufactured body produced by layering using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, 0 to 3.0% Nb, and 0.01 to 0.5% C, with the balance being Ni and unavoidable impurities. [Embodiment 6] The additively manufactured body according to any one of embodiments 1 to 3, which is an additively manufactured body using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, and 0 to 3.0% Nb, and further containing at least one or more selected from the group consisting of 0.01 to 0.5% C and 0.1 to 10.0% W as optional additional components, with the balance being Ni and unavoidable impurities. [Embodiment 7] The additively manufactured body according to any one of embodiments 1 to 3, which is an additively manufactured body using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, and 0 to 3.0% Nb, and further containing at least one or more selected from the group consisting of 0.01 to 0.5% C, 0.1 to 10.0% W, and 0.1 to 8.0% Fe as optional additional components, with the balance being Ni and unavoidable impurities. [Embodiment 8] The additively manufactured body according to any one of embodiments 1 to 3, which is an additively manufactured body using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, and 0 to 3.0% Nb, and further containing at least one or more selected from the group consisting of 0.01 to 0.5% C, 0.1 to 10.0% W, 0.1 to 8.0% Fe, and 0.1 to 6.0% Cu as selective additional components, with the balance being Ni and unavoidable impurities.

[0010] According to the present invention, a metal additive manufacturing product of a NiCrMo-based alloy having high corrosion resistance and high hardness can be obtained. According to a preferred embodiment of the present disclosure, a metal additive manufacturing product having a hardness of 37 HRC or more and a hydrofluoric acid corrosion resistance of 1.00 or less can be obtained.

[0011] 1 is a transmission electron microscope (TEM) image showing the P phase of a structure of an additively shaped body using the NiCrMo-based alloy powder of the present invention, which has been solution treated at 1150°C and then aged at 750°C. FIG. 2 is a scanning electron microscope (SEM) backscattered electron image of a structure of an additively shaped body using the NiCrMo-based alloy powder of the present invention, which has been solution treated at 1150°C and then aged at 650°C. The white areas are mainly coarse Mo compounds. FIG. 3 is a SEM backscattered electron image of a structure of an additively shaped body using the NiCrMo-based alloy powder of the present invention, which has been aged at 650°C without solution treatment. FIG. 4 is a graph showing the relationship between the presence or absence of solution treatment, the aging temperature, and the major axis of the P phase in Examples and Comparative Examples. FIG. 5 is a graph showing the relationship between the presence or absence of solution treatment, the major axis of the P phase, and hydrofluoric acid corrosion resistance in Examples and Comparative Examples. FIG. 6 is a graph showing the relationship between the presence or absence of solution treatment, the aging temperature, and hardness in Examples and Comparative Examples. 1 is a graph showing the relationship between the presence or absence of solution treatment, the major axis of the P phase, and hardness in Examples and Comparative Examples. 2 is a graph showing the relationship between the presence or absence of solution treatment, the aging temperature, and the area ratio of Mo compounds in Examples and Comparative Examples. 3 is a graph showing the relationship between the presence or absence of solution treatment, the area ratio of Mo compounds, and hydrofluoric acid corrosion resistance in Examples and Comparative Examples.

[0012] Prior to describing the embodiments of the present invention, the reasons for specifying the preferred component composition of the NiCrMo-based alloy used in the present invention will be explained. The balance is Ni and unavoidable impurities. The percentages of the chemical components are in mass percent.

[0013] Mo: 13.0 to 22.0% Mo dissolves in the Ni base material and contributes to the corrosion resistance of the alloy. Mo particularly contributes to corrosion resistance against non-oxidizing acids. When a Mo-containing base material is subjected to solution treatment and aging treatment, numerous Mo compound phases precipitate. These Mo compound phases are dispersed in the matrix. The main component of the Mo compound phase is Mo. This Mo compound phase also has high hardness. This Mo compound phase can contribute to the wear resistance of the alloy. From these perspectives, the Mo content in NiCrMo-based alloys is preferably 13.0% or more, more preferably 14.0% or more, and even more preferably 15.0% or more. On the other hand, excessive Mo increases costs. Therefore, from a cost perspective, the Mo content is preferably 22.0% or less, more preferably 20.0% or less, even more preferably 18.0% or less, and even more preferably 17.0% or less.

[0014] Cr: 17.0 to 25.0% Cr dissolves in the Ni base material and contributes to the corrosion resistance of the alloy. Cr also contributes to corrosion resistance against various acids. Cr can be contained in the Mo compound phase precipitated by solution treatment and aging treatment, and this Mo compound phase has high hardness. From the viewpoint of precipitating a Mo compound phase containing sufficient Cr and ensuring that sufficient Cr is present in the matrix after precipitation of the Mo compound phase, the Cr content in the NiCrMo-based alloy is preferably 17.0% or more, more preferably 18.5% or more, even more preferably 20.0% or more, and particularly preferably 21.0% or more. On the other hand, from the viewpoint of cost reduction, the Cr content is preferably 25.0% or less, more preferably 24.0% or less, and even more preferably 23.0% or less.

[0015] Al: 0 to 3.0% Al dissolves in the base material Ni. When the base material containing Al is subjected to solution treatment and aging treatment, a large amount of γ' phase (Ni ３The γ' phase (a γ' phase) precipitates and disperses in the matrix. Alloys having this γ' phase have high hardness. Therefore, up to 3.0% of Al can be added to the NiCrMo-based alloy of the present invention. From the viewpoint of γ' phase precipitation, the Al content in the NiCrMo-based alloy is preferably 0.5 to 2.5%, more preferably 1.0 to 2.5%, and even more preferably 1.5 to 2.5%.

[0016] Nb: 0 to 3.0% Nb dissolves in the base material Ni, and the amount of Nb dissolved in Ni during solution treatment is greater than that of Al. In alloys containing Nb, many Mo compounds can dissolve in solution during solution treatment. This alloy has a large difference in hardness before and after aging treatment. This alloy has high machinability after solution treatment. Nb also dissolves in the γ' phase by substitution with Al, and Ni ３ An (Al, Nb) phase is formed. This γ' phase hardens by aging treatment. Therefore, up to 3.0% Nb can be added to the NiCrMo-based alloy of the present invention. From the viewpoint of precipitation of the γ' phase, the Nb content is preferably 0.2 to 2.5%, more preferably 0.5 to 2.0%, and even more preferably 0.5 to 1.2%.

[0017] Further, C, W, Fe and Cu, which can be optionally added to the present invention, will be explained.

[0018] C: 0.01 to 0.5% C is an element that contributes to the formation of carbides and has the effect of improving hardness. From this viewpoint, when C is added, the C content in the NiCrMo-based alloy is preferably 0.03% or more, more preferably 0.08% or more, and even more preferably 0.15% or more. On the other hand, if too much C is added, coarse carbides are formed and corrosion resistance deteriorates, so the C content is preferably 0.5% or less, more preferably 0.40% or less, even more preferably 0.35% or less, and particularly preferably 0.30% or less.

[0019] W: 0.1 to 10.0% W is an element that functions similarly to Mo, but in some cases, the use of W can improve corrosion resistance. Therefore, when W is added, the W content in the NiCrMo-based alloy is preferably 0.5% or more, more preferably 2.0% or more, and even more preferably 3.0% or more. On the other hand, from the viewpoint of cost, the W content is preferably 9.0% or less, more preferably 8.0% or less, and even more preferably 7.0% or less.

[0020] Fe: 0.1 to 8.0% Fe can be added for the purpose of reducing costs. When W is added, the F content in the NiCrMo-based alloy is preferably 0.5% or more, more preferably 1.0% or more, and even more preferably 2.5% or more. On the other hand, since adding too much Fe deteriorates corrosion resistance, the Fe content is preferably 7.0% or less, more preferably 6.0% or less, and even more preferably 5.0% or less.

[0021] Cu: 0.1 to 6.0% Cu can improve corrosion resistance to hydrofluoric acid. From this viewpoint, the Cu content in the NiCrMo-based alloy is preferably 0.5% or more, more preferably 1.5% or more, and even more preferably 2.0% or more. On the other hand, since adding too much Cu reduces hardness, the Cu content is preferably 5.0% or less, more preferably 4.5% or less, and even more preferably 4.0% or less.

[0022] The NiCrMo-based alloy additive manufacturing method according to the present invention is produced by metal additive manufacturing using a NiCrMo-based alloy as the material. The additive manufacturing method can be performed by solutionizing the additive manufacturing method and then aging the resultant product to obtain an additive manufacturing product containing a P phase. Note that the solutionizing step before aging can be omitted. This is described in detail below.

[0023] [Powder] The NiCrMo-based alloy powder used in the present invention is preferably a gas-atomized powder, which is easy to obtain a spherical shape from the viewpoints of flowability and packing property. The NiCrMo-based alloy powder preferably has an average particle diameter D50 of 10 μm or more and 100 μm or less on a volume average basis. The average particle diameter D50 is the particle diameter at which the cumulative volume is 50% in the cumulative volume curve of the powder. The average particle diameter D50 is measured using a laser diffraction / scattering particle size distribution analyzer.

[0024] [Shaping] A method for producing a shaped object includes a rapid melting and rapid solidification process, which is a process of melting and solidifying a metal powder. Specific examples of this process include three-dimensional additive manufacturing, thermal spraying, laser coating, and cladding. In particular, the NiCrMo-based alloy powder of the present invention is suitable for powder bed fusion-type three-dimensional additive manufacturing, and can form large-sized shaped objects at high density.

[0025] For example, a 3D printer can be used as a three-dimensional additive manufacturing method. Common methods include powder bed fusion (powder bed) and directed energy deposition (deposition). In the powder bed method, metal powder is spread from a powder supply unit such as a tank to the additive manufacturing unit using a blade or brush called a recoater, spreading the powder thinly and uniformly. A heat source is then applied to the required areas in the additive manufacturing unit to selectively melt and form the desired shape. In the deposition method, a laser is irradiated while supplying metal powder, depositing the molten metal, and the nozzle is moved three-dimensionally to build up the model.

[0026] For example, in the powder bed method, a laser beam or an electron beam is irradiated onto the spread NiCrMo alloy powder of the present invention, causing the particles to rapidly heat and melt, and then the molten particles rapidly solidify. This melting and solidification process bonds the particles together. Since the beam is irradiated selectively onto a portion of the spread NiCrMo alloy powder, the portion of the spread powder that is not irradiated with the beam does not melt, and a bonded layer is formed only in the portion that is irradiated with the beam by rapid melting and rapid solidification.

[0027] A thin layer of NiCrMo alloy powder is then spread on top of the formed bonding layer. A laser beam or electron beam is irradiated onto a portion of the NiCrMo alloy powder, causing the particles to rapidly melt and then rapidly solidify. This melting and solidification process bonds the particles in the powder together, forming a new bonding layer. This new bonding layer also bonds with the existing bonding layer.

[0028] By repeating the bonding process through irradiation, the aggregate of bonding layers gradually grows. This growth results in a shaped object with a desired three-dimensional shape. This additive manufacturing method makes it easy to obtain shaped objects with complex shapes.

[0029] [Heat Treatment] When an additive manufacturing body is made using NiCrMo-based alloy powder, instead of using the unheat-treated body as is, the unheat-treated body can be solution-treated and then aged to obtain a body containing the P phase (hereinafter, "solution treated and aged" will also be referred to as "STA"). Note that the solution treatment before aging can also be omitted (hereinafter, "direct aged" will also be referred to as "DA").

[0030] The solution treatment is carried out at a temperature of 1000° C. or higher. The solution treatment is preferably carried out at a temperature of 1050° C. or higher, more preferably at a temperature of 1100° C. or higher, and even more preferably at a temperature of 1150° C. or higher.

[0031] Aging treatment is generally carried out at a temperature of 600° C. or higher. As shown in Figures 4, 6 and 8, it is preferable to carry out aging treatment at an aging temperature in the range of 650 to 700° C.

[0032] [Regarding the P phase in NiCrMo-based alloys] The P phase in the present invention refers to a NiCrMo-based compound (Cr ９ Mo ２１ Ni ２０) and are needle-like precipitates, as shown in black in the center of the TEM image in Figure 1. The crystal system of the P phase is Orthorhombic, and its space group is Pnma, so it can be identified as the P phase from the TEM electron diffraction pattern.

[0033] This P phase is not observed in the ingot material of Patent Document 2, and is a compound that precipitates during the aging treatment of a metal additive manufacturing body that has been rapidly solidified. That is, the additive manufacturing body of the present invention has fine solidification segregation of Mo due to rapid solidification. The P phase precipitates from the fine segregation of Mo, and it is believed that the fine segregation structure unique to additive manufacturing is the cause of the precipitation of the P phase.

[0034] In addition, in Patent Document 3, which relates to a NiCrMo-based alloy having a different chemical composition from that of the present invention, a Ni phase is used instead of a P phase. ２ It is different in that it utilizes the precipitation of (Cr, Mo).

[0035] [Regarding the Morphology of the P Phase] The morphology of the P phase can be controlled by heat treatment. When a coarse P phase with a major axis exceeding 1000 nm precipitates, the area ratio of the Cr- and Mo-deficient phase near the precipitate increases compared to the case of fine P phase precipitation, deteriorating the corrosion resistance of the matrix. Therefore, corrosion resistance can be improved by controlling the major axis of the P phase to 1000 nm or less. Furthermore, a fine P phase increases the amount of precipitation strengthening and increases hardness. From these viewpoints, the major axis of the P phase is preferably 1000 nm or less, more preferably 700 nm or less, even more preferably 400 nm or less, and even more preferably 100 nm or less.

[0036] [Method for calculating the major axis of the P phase] TEM images were taken at five locations within a 5 μm × 5 μm area on the cross section of the alloy sample, and the shapes of the needle-like P phases contained therein were evaluated by image analysis to determine their major axes. The average of the obtained major axes was calculated to be the major axis of the P phase.

[0037] [Regarding the area ratio of coarse Mo compounds] When solution treatment is performed, coarse Mo-based compounds on the μm scale as shown in Figure 2 are precipitated. These coarse Mo-based compounds on the μm scale are different compounds from the nm-scale P phase. In the case of NiCrMo-based alloys made from ingots, since solution treatment is always performed, it can be said that it is practically difficult to obtain a structure that does not contain coarse Mo compounds by direct aging treatment without using metal additive manufacturing. From these viewpoints, the area ratio of coarse Mo compounds is preferably 5% or less, more preferably 3% or less, and even more preferably 1% or less.

[0038] [Method for calculating the area ratio of coarse Mo compounds] In the present invention, coarse Mo compounds are compounds having an area (i.e., cross-sectional area) of 1 μm ２ The above-mentioned Mo-based compounds are defined as coarse Mo compounds. As shown in Figure 2, when a cross section of an alloy sample is observed with an SEM, coarse Mo compounds can be identified based on the white areas in the SEM backscattered electron image, and the value can be calculated using image analysis software. Specifically, five fields of view are photographed at a magnification of 4000 times, and the average of the values ​​calculated using image analysis software is evaluated as the area ratio.

[0039] [Powder] Table 1 shows the chemical compositions of the NiCrMo-based alloy powders used in Examples 1 to 10 and Comparative Examples 1 to 3. The NiCrMo-based alloy powders were prepared by vacuum melting and inert gas atomization using raw materials with the compositions listed in Table 1, and then classified using a sieve with 63 μm openings. The obtained NiCrMo-based alloy powders were used as the raw materials for additive manufacturing in the examples and comparative examples.

[0040]

[0041] [Modeling] Using the NiCrMo-based alloy powders listed in Table 1 as raw materials, 10 mm x 10 mm x 15 mm high blocks were additively manufactured using a three-dimensional additive manufacturing device (EOS-M280) by additive manufacturing to prepare test pieces for evaluating hardness and corrosion resistance. The modeling conditions used were the standard device parameters IN718 (layer thickness 40 μm), which are the conditions recommended by EOS as suitable conditions for modeling using the EOS-M280.

[0042] [Heat Treatment] Tables 2 and 3 show the heat treatment conditions for the Examples and Comparative Examples. The solution treatment temperatures for the solution treatment and the aging temperatures for the aging treatment are as shown in Tables 2 and 3. The solution treatment was performed by holding the specimens at the solution temperature for 4 hours followed by air cooling. The aging treatment was performed by holding the specimens at the aging temperature for 16 hours followed by air cooling. All heat treatments were performed in the air.

[0043]

[0044]

[0045] [Hardness Measurement] After heat treatment, a 10 mm x 10 mm x 15 mm high block was cut at a height of 7.5 mm, and the Rockwell hardness was measured on the cut surface. A hardness of 37 HRC or more was evaluated as good. The results are shown in Tables 2 and 3. In Table 3, underlines indicate results that did not meet the evaluation criteria.

[0046] [Measurement of hydrofluoric acid corrosion resistance] A 10 mm x 10 mm x 15 mm high block was heat treated and then polished on all sides. This test piece was immersed in a 10% aqueous solution of hydrofluoric acid for 10 hours. The temperature of this aqueous solution was 40°C. Furthermore, the mass loss of the test piece was measured, and the corrosion resistance was evaluated from the surface area. Hydrofluoric acid corrosion resistance of 1.00 or less was evaluated as good. The results are shown in Tables 2 and 3. In Table 3, underlines indicate deviations from the evaluation criteria.

[0047] In the examples, the layered manufactured body produced using the NiCrMo-based alloy powder of the present invention had a hardness of 37 HRC or more and a hydrofluoric acid corrosion resistance of 1.00 or less, and met the standards for both hardness and corrosion resistance.

[0048] On the other hand, the comparative examples had poor corrosion resistance, with hydrofluoric acid corrosion resistance exceeding 1.00, or hardness below 37 HRC, meaning that the corrosion resistance or hardness was insufficient. In comparative example 1, the aging temperature was too high, so the major axis of the P phase became large, resulting in poor corrosion resistance. In comparative example 2, which was solution-treated, the aging temperature was too high, so the major axis of the P phase became large, resulting in poor corrosion resistance. In comparative example 3, the aging temperature was too low, so the P phase did not precipitate, and the hardness that would have been obtained by precipitation through aging treatment was lower than in the examples.

[0049] The additive manufacturing product using the NiCrMo-based alloy of the present invention can be suitably applied to various products that require high corrosion resistance and high hardness.

Claims

1. An additive manufacturing body made of a NiCrMo-based alloy containing a P phase among its constituent phases.

2. The layered product according to claim 1, wherein the major axis of the P phase is 1000 nm or less.

3. Area is 1 μm ２ 2. The layered manufactured body according to claim 1, wherein the area ratio of the above-mentioned coarse Mo compound phase is 7% or less.

4. The layered manufactured body according to any one of claims 1 to 3, which is an layered manufactured body produced by layering using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, and 0 to 3.0% Nb, with the remainder being Ni and unavoidable impurities.

5. The layered manufactured body according to any one of claims 1 to 3, which is an layered manufactured body produced by layering using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, 0 to 3.0% Nb, and 0.01 to 0.5% C, with the remainder being Ni and unavoidable impurities.

6. The additively manufactured body according to any one of claims 1 to 3, which is an additively manufactured body using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, and 0 to 3.0% Nb, and further containing at least one or more selected from the group consisting of 0.01 to 0.5% C and 0.1 to 10.0% W as optional additional components, with the balance being Ni and unavoidable impurities.

7. The layered manufactured body according to any one of claims 1 to 3, which is an layered manufactured body produced by layer manufacturing using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, and 0 to 3.0% Nb, and further containing at least one or more selected from the group consisting of 0.01 to 0.5% C, 0.1 to 10.0% W, and 0.1 to 8.0% Fe as optional additional components, with the balance being Ni and unavoidable impurities.

8. The layered manufactured body according to any one of claims 1 to 3, which is an layered manufactured body produced by layer manufacturing using a NiCrMo-based alloy powder containing, by mass%, 17.0 to 25.0% Cr, 13.0 to 22.0% Mo, 0 to 3.0% Al, and 0 to 3.0% Nb, and further containing at least one or more selected from the group consisting of 0.01 to 0.5% C, 0.1 to 10.0% W, 0.1 to 8.0% Fe, and 0.1 to 6.0% Cu as selective additional components, with the remainder being Ni and unavoidable impurities.

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