JP5961593B2 - Metal member and manufacturing method thereof - Google Patents

Description

  The present invention relates to a metal member having a three-dimensional structure and a manufacturing method thereof.

  A method is disclosed in which a thermoplastic resin is injected into a screw-shaped mold and a rotating shaft and a screw part are manufactured by integral molding (see Patent Document 1).

  Further, as a metal powder stereolithography method, a method of forming a three-dimensional structure by forming a thin layer by laminating thin metal powders with uniform components and sintering with a laser beam and laminating them is disclosed. (See Patent Document 2).

Japanese Patent Laid-Open No. 7-267483 JP 2004-124201 A

  However, the method described in Patent Document 1 is a method of manufacturing a resin screw and requires a mold. Moreover, since the method of the said patent document 2 laminates | stacks the thin layer obtained by stereolithography, and forms a three-dimensional structure, a manufacturing process increases and the time which manufactures a metal member becomes long. Specifically, once lamination is performed, the next lamination cannot be performed without waiting until the metal surface cools down, and work takes time.

  Therefore, an object of the present invention is to shorten the time required for manufacturing a metal member having a three-dimensional structure.

  In order to achieve the above object, the metal member manufacturing method according to claim 1 includes a powder filling step of filling metal powder between a metal base material and a holding member surrounding the base material, By irradiating the base material and the metal powder with a high energy beam from the outside of the holding member in a state where the metal powder is in contact with the base material, a part of the base material and the metal A part of the powder is melted to produce a melt, and the melt is solidified to integrally form a convex weld metal on the base material to obtain a metal member, and the remaining part A removal step of removing the metal powder and the holding member.

  According to this metal member manufacturing method, when a high energy beam is irradiated, a part of the base material and a part of the metal powder are melted, and the optical axis direction of the high energy beam is set in the height direction (depth). Direction). Then, by solidifying the melt, a convex weld metal is integrally formed on the base material to obtain a metal member. The holding member and the metal powder remaining without being solidified are removed. Therefore, it is not necessary to laminate a melt of metal powder to form a convex weld metal on the base material, so it is manufactured in comparison with conventional methods (for example, three-dimensional modeling and powder overlay welding). The number of steps can be reduced. Thereby, the time which manufactures the metal member which has a three-dimensional structure can be shortened.

  The metal member manufacturing method according to claim 2 is the metal member manufacturing method according to claim 1, wherein the high energy beam is moved relative to the base material, the holding member, and the metal powder. The method of forming the convex weld metal along the relative movement direction of the high energy beam.

  According to this metal member manufacturing method, a high energy beam is moved relative to the base material, the holding member and the metal powder, and a part of the base material and the metal powder are moved along the relative movement direction of the high energy beam. Since a part of the body is melted, a melt can be generated continuously in this relative movement direction. By solidifying the melt, a convex weld metal continuous in the relative movement direction of the high energy beam can be formed on the base material.

  According to a third aspect of the present invention, there is provided a metal member manufacturing method comprising: irradiating the high energy beam in the welding step of the metal member manufacturing method according to the second aspect; In this method, a molten pool as the melt is formed on a part of a body, and the high energy beam is relatively moved while forming a keyhole in the molten pool.

  According to this metal member manufacturing method, a high energy beam is relatively moved while forming a keyhole in a molten pool formed in a part of the base material and a part of the metal powder. Therefore, the high energy beam can reach a deep position through the keyhole, so that a convex weld metal can be integrally formed on the base material.

  The method for manufacturing a metal member according to claim 4 is characterized in that, in the welding process of the method for manufacturing a metal member according to any one of claims 1 to 3, the high energy beam is focused on the holding member, This is a method of irradiating the high energy beam in a state set at the position of the base material or the metal powder.

  According to this metal member manufacturing method, the focal point of the high energy beam is set at the position of the holding member, the base material, or the metal powder, so that part of the base material and part of the metal powder are effectively melted. To produce a melt. Thereby, a part of the base material and a part of the metal powder are melted and then solidified, so that a convex weld metal can be integrally formed on the base material.

  The metal member manufacturing method according to claim 5 is the metal member manufacturing method according to any one of claims 1 to 4, wherein a transparent tube is used as the holding member.

  According to this metal member manufacturing method, the high energy beam is transmitted through the transparent tube and irradiated onto the base material and the metal powder. Therefore, even if the power density of the high energy beam is reduced, a part of the base material is used. In addition, a part of the metal powder can be melted. Further, when a part of the base material and a part of the metal powder are melted and solidified, it is possible to prevent the transparent tube as the holding member from being melted and solidified together. For this reason, it is possible to facilitate the removal of the transparent tube and the remaining metal powder in the removing step while reducing the manufacturing cost.

  The method for producing a metal member according to claim 6 is the method for producing a metal member according to any one of claims 1 to 4, wherein a thin metal tube is used as the holding member.

  According to this metal member manufacturing method, when a part of the base material and a part of the metal powder are melted and solidified by irradiation with a high energy beam, the metal tube as the holding member is also melted and solidified. To do. Since the metal tube is thin, the metal tube can be easily removed in the removal process.

  As described above in detail, according to the present invention, the time required for manufacturing a metal member having a three-dimensional structure can be shortened.

It is explanatory drawing explaining the flow which concerns on 1st Embodiment and forms a convex-shaped weld metal in a base material. It is a partially broken perspective view which shows the state which concerns on 1st Embodiment and was filled with the metal powder between the base material and the transparent tube. It is explanatory drawing explaining the flow of the manufacturing method of the metal member which concerns on the specific example 1 of 1st Embodiment. It is explanatory drawing explaining the flow of the manufacturing method of the metal member which concerns on the specific example 2 of 1st Embodiment. It is explanatory drawing explaining the flow of the manufacturing method of the metal member which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
In the present embodiment, a method for manufacturing the metal member 10 and the metal member 10 will be described. In FIG. 1A, a manufacturing apparatus 16 used in the method of manufacturing the metal member 10 emits a high energy beam 22 and directs the high energy beam 22 emitted from the emission unit 24 toward an object. The irradiation part 26 to irradiate, the drive part 28 which moves the transparent tube 11 and the base material 12 suitably, and the control part 30 which controls these are provided.

  The high energy beam 22 is, for example, a laser beam. In this case, the emission unit 24 is a laser oscillator. In the emission part 24, the energy of the emitted high energy beam 22 can be adjusted. The irradiation unit 26 is configured by an optical system including a lens and the like. In the irradiation unit 26, the focal length of the irradiated high energy beam 22 can be adjusted by moving a lens or the like.

  Then, the metal member 10 is manufactured by the manufacturing apparatus 16 in the following manner. That is, first, as shown in FIG. 1A, a base material 12 and a transparent tube 11 as an example of a holding member surrounding the base material 12 are set in a manufacturing apparatus 16 so as to be concentric, for example. The As the transparent tube 11, a heat resistant material such as quartz glass is used.

  Subsequently, the metal powder 32 is filled in the gap between the transparent tube 11 and the base material 12, and the openings around the transparent tube 11 and the base material 12 are closed by a lid (not shown). At this time, a sufficient amount of metal powder is placed between the transparent tube 11 and the base material 12 so that the metal powder 32 contacts the entire inner surface 11A of the transparent tube 11 and the entire outer surface 12A of the base material 12. 32 is filled (the powder filling step). In the present embodiment, as the metal powder 32, the same metal as the metal base material 12 is used as an example. As this metal, for example, stainless steel, iron, aluminum, copper and the like are appropriately selected.

  Then, in a state where the metal powder 32 is filled between the transparent tube 11 and the base material 12, the transparent tube 11, the base material 12 and the metal powder 32 are transferred from the irradiation unit 26 located outside the transparent tube 11. A high energy beam 22 is irradiated toward the target.

  More specifically, the focal length of the high energy beam 22 is adjusted by controlling the irradiation unit 26 by the control unit 30 and moving the lens or the like in the irradiation unit 26. Then, as shown in FIGS. 1A and 1B, the focal point 22A of the high energy beam 22 is set, for example, at the position of the metal powder 32 (between the transparent tube 11 and the base material 12). In this state, the high energy beam 22 is irradiated from the outside of the transparent tube 11 toward the transparent tube 11, the base material 12, and the metal powder 32.

  When the high energy beam 22 is irradiated in this way, a molten pool 36 as a melt is formed on a part of the base material 12 and a part of the metal powder 32. When the power density of the high energy beam 22 is high, metal evaporation occurs on the surface of the molten pool 36, and metal vapor is generated. Further, a repulsive force is generated on the surface of the molten pool 36 by this steam, and a dent is generated in the central portion of the molten pool 36. When this recess becomes deep, a keyhole 40 is formed in the molten pool 36. When the keyhole 40 is thus formed in the molten pool 36, the high energy beam 22 reaches the deep position of the metal powder 32 through the keyhole 40.

  As shown in FIG. 1B, the high energy beam 22 moves relative to the transparent tube 11, the base material 12, and the metal powder 32 while forming the keyhole 40 in the molten pool 36. The relative movement direction of the high energy beam 22 is the direction in which the convex weld metal 14 is formed. Further, the relative movement of the high energy beam 22 with respect to the transparent tube 11, the base material 12, and the metal powder 32 is performed by operating the drive unit 28 by the control unit 30 shown in FIG.

  As shown in FIG. 1B, the molten pool 36 is generated along the relative movement direction of the high energy beam 22. At this time, the molten pool 36 is formed at the irradiation position P of the relatively moving high energy beam 22, but since the high energy beam 22 relatively moves before the molten pool 36 spreads, the relative movement direction of the high energy beam 22 is increased. On the rear side R from the irradiation position P, the molten pool 36 is cooled and solidified.

  Thus, in the present embodiment, the molten pool 36 is formed at the irradiation position P of the relatively moving high energy beam 22, and the molten pool 36 is formed at the rear side R of the irradiation position P in the relative movement direction of the high energy beam 22. The relative moving speed of the high energy beam 22 is set so that it is cooled and solidified.

  Then, the molten pool 36 is cooled and solidified in this manner, whereby a convex weld metal 14 is formed between the transparent tube 11 and the base material 12 as shown in FIG. Since this convex weld metal 14 is formed by solidifying a molten pool 36 formed by melting a part of the base material 12 and a part of the metal powder 32, the transparent tube 11 and It is formed integrally with the base material 12. In the present embodiment, the convex weld metal 14 can be continuously formed in the relative movement direction of the high energy beam 22.

  In the present embodiment, as shown in FIG. 1C, only a part of the metal powder 32 filled between the transparent tube 11 and the base material 12 is melted, and the metal powder 32 The part that was not melted remains. When the molten pool 36 is cooled and solidified, the remaining metal powder 32 plays a role of a mold (maintaining the shape of the molten pool 36 and radiating heat). For this reason, in this embodiment, the molten pool 36 is solidified and the convex weld metal 14 is maintained in a state in which the shape of the molten pool 36 (a shape in which the optical axis direction of the high energy beam 22 is the depth direction) is maintained. Is formed.

  And the convex welding metal 14 can be formed in the outer surface 12A of the base material 12 by repeating the said operation | movement (above, a welding process). Thereafter, the lid (not shown) is removed from the transparent tube 11 and the base material 12, and the remaining metal powder 32 and the transparent tube 11 are removed from the base material 12 (removal step).

  In the above manner, as shown in FIG. 1D, the metal member 10 having the convex weld metal 14 is obtained. The height of the convex weld metal 14 can be set by the distance between the outer surface 12A of the base material 12 and the inner surface 11A of the transparent tube 11. FIG. 1D shows a side cross-sectional view of the convex weld metal 14 and its peripheral portion in the metal member 10 manufactured as described above, and FIG. A front sectional view of the convex weld metal 14 and its peripheral part is shown.

  When the relative movement speed of the high energy beam 22 is increased, the spread of heat around the high energy beam 22 is suppressed, so that curved surfaces formed at both ends in the length direction of the convex weld metal 14. The curvature of 14A becomes smaller. Further, as shown in FIG. 1E, the width of the convex weld metal 14 is narrowed, and the curvature of the curved surface 14B formed on both sides of the convex weld metal 14 is also small.

  When the relative movement speed of the high energy beam 22 is decreased, the heat spreads around the high energy beam 22, so that the region where the molten pool 36 is formed is enlarged. Therefore, the curvature of the curved surface 14A formed at both ends in the length direction of the convex weld metal 14 is increased. Further, the width of the convex weld metal 14 is widened, and the curvature of the curved surface 14B formed on both sides of the convex weld metal 14 is also large. Furthermore, the strength of the joint portion between the convex weld metal 14 and the base material 12 can be increased.

  Although not particularly illustrated, when the energy of the high energy beam 22 emitted from the emission unit 24 is increased, the heating temperature by the high energy beam 22 is increased and the generation of the molten pool 36 is promoted. The depth of 36 increases. Further, when the focal point 22A of the high energy beam 22 is set at a position (deep position) farther from the inner surface 11A of the transparent tube 11 on the metal powder 32 side, the high energy beam 22 reaches a deeper position of the metal powder 32. Since it is heated, the depth of the molten pool 36 increases.

  Thus, in the manufacturing method of the metal member 10 described above, the relative movement speed of the high energy beam 22 and the high energy beam 22 are determined in accordance with the specifications of the metal member 10 (the required shape of the convex weld metal 14 and the like). And the focal length of the high energy beam 22 are set.

  When the molten pool 36 is solidified, the molten metal powder 32 adhering to the molten pool 36 is solidified, whereby a plurality of granular protrusions are formed on the surface of the convex weld metal 14 (not shown). ) The plurality of granular protrusions are formed by solidifying the metal powder 32 (see FIG. 1) attached to the molten pool 36 when the molten pool 36 is solidified without being completely melted. That is, since the granular protrusion is an incomplete melt of the metal powder 32, the powder shape remains. In addition, it is possible to change the size of the granular protrusion, that is, the surface roughness of the convex weld metal 14 by changing the particle size of the metal powder 32 to be used. In order to prevent the transparent tube 11 from melting when irradiated with the high energy beam 22, the high energy beam 22 may be irradiated in a cooling gas or in water.

(Function)
Next, the operation and effect of this embodiment will be described. As described above in detail, according to the present embodiment, by irradiating the high energy beam 22, a part of the base material 12 and a part of the metal powder 32 are melted, and the optical axis of the high energy beam 22. A molten pool 36 (melt) having a direction as a height direction (depth direction) is generated. The molten pool 36 is solidified, whereby the convex weld metal 14 is formed integrally with the base material 12 to obtain the metal member 10. The transparent tube 11 and the metal powder 32 remaining without being solidified are removed. Therefore, since it is not necessary to laminate the melt of the metal powder 32 in order to form the convex weld metal 14 on the base material 12, it is compared with conventional methods (for example, three-dimensional modeling and powder overlay welding). Thus, the manufacturing process can be reduced. Specifically, the convex weld metal 14 having a desired height, thickness, and length can be formed at a time. Thereby, the time which manufactures the metal member 10 which has a three-dimensional structure can be shortened.

  Moreover, in this embodiment, after producing | generating the molten pool 36 which makes the optical axis direction of the high energy beam 22 the depth direction, the convex weld metal 14 is formed by solidifying this molten pool 36. As shown in FIG. In addition, since only a part of the metal powder 32 filled between the transparent tube 11 and the base material 12 is melted by the high energy beam 22, when the molten pool 36 is solidified, the remaining metal The powder 32 plays a role of a mold with respect to the molten pool (shape retention and heat dissipation of the molten pool 36). Therefore, since the shape of the molten pool 36 (the shape in which the optical axis direction of the high energy beam 22 is the depth direction) can be maintained, the molten pool 36 can be solidified while maintaining the shape of the molten pool 36. . Thereby, the shape of the convex weld metal 14 is securable. Since a part of the base material 12 and a part of the metal powder 32 are melted and then solidified, the bonding strength of the convex weld metal 14 to the base material 12 is high.

  Further, the high energy beam 22 is moved relative to the transparent tube 11, the base material 12, and the metal powder 32, and a part of the base material 12 and the metal powder 32 are moved along the relative movement direction of the high energy beam 22. Therefore, the molten pool 36 can be generated continuously in the relative movement direction of the high energy beam 22. By solidifying the molten pool 36, the convex weld metal 14 can be continuously formed in the relative movement direction of the high energy beam 22.

  Further, since the focal point 22A of the high energy beam 22 is set at a position closer to the metal powder 32 (between the transparent tube 11 and the base material 12) than the inner surface 11A of the transparent tube 11, it is deeper than the inner surface 11A of the transparent tube 11. The molten pool 36 can be generated by melting the metal powder 32 to the position. Thereby, a part of the base material 12 and a part of the metal powder 32 located on the opposite side of the irradiation side of the high energy beam 22 can be melted to form the convex weld metal 14 integrally.

  Further, the high energy beam 22 is relatively moved while forming the keyhole 40 in the molten pool 36 formed in a part of the base material 12 and a part of the metal powder 32. Accordingly, since the high energy beam 22 can reach the deep position of the metal powder 32 through the keyhole 40, the convex weld metal 14 can also be formed integrally with this.

  Further, since the metal powder 32 is filled between the transparent tube 11 and the base material 12, the flow of the metal powder 32 can be suppressed. Thereby, since the shape of the molten pool 36 which is a melt of the metal powder 32 can be prevented from collapsing, the molten pool 36 is solidified while maintaining the shape of the molten pool 36 more stably. A weld metal 14 can be formed.

  Furthermore, according to the method for manufacturing the metal member 10, the high energy beam 22 passes through the transparent tube 11 and is irradiated onto the base material 12 and the metal powder 32. Therefore, the power density of the high energy beam 22 is reduced. However, a part of the base material 12 and a part of the metal powder 32 can be melted. Further, when a part of the base material 12 and a part of the metal powder 32 are melted and solidified, the transparent tube 11 as the holding member is prevented from being melted and solidified together. For this reason, the removal of the transparent tube 11 and the remaining metal powder 32 in the removal process can be facilitated while reducing the manufacturing cost.

(Specific example 1)
FIG. 3 shows a flow of a method for manufacturing the metal member 10 according to the first specific example. In FIG. 3A, the base material 12 is a round shaft, and the transparent tube 11 is a circular tube. The inner diameter of the transparent tube 11 is larger than the outer diameter of the base material 12. The transparent tube 11 is arranged concentrically with the base material 12. By irradiating the high energy beam 22 from the outside of the transparent tube 11 and relatively moving in the axial direction of the base material 12, as shown in FIG. 3B, the outer surface 12A of the base material 12 is moved in the axial direction. An extending convex weld metal 14 can be formed.

(Specific example 2)
FIG. 4 shows a flow of a method for manufacturing the metal member 10 according to the second specific example. In FIG. 4 (A), the outer surface of the base material 12 is moved as shown in FIG. 4 (B) by relatively moving in the circumferential direction of the base material 12 while irradiating the high energy beam 22 from the outside of the transparent tube 11. A convex weld metal 14 extending in the circumferential direction can be formed on 12A. The convex weld metal 14 has a bowl shape. The shape and arrangement of the transparent tube 11 and the base material 12 are the same as in the first specific example.

  In addition, when the high-energy beam 22 is relatively moved in the axial direction of the base material 12 while rotating the transparent tube 11 and the base material 12 filled with the metal powder 32 in the circumferential direction, the outer surface of the base material 12 is obtained. A metal member (not shown) in which a convex weld metal 14 is formed in a spiral shape on 12A can be obtained. This metal member can be used as a main shaft of a screw pump.

[Second Embodiment]
In the present embodiment, a method for manufacturing the metal member 20 and the metal member 20 will be described. In FIG. 5, the metal member 20 is manufactured in the following manner using the manufacturing apparatus 16 (FIG. 1) similar to that of the first embodiment. First, the base material 12 and a thin metal tube 21 as an example of a holding member surrounding the base material 12 are set in the manufacturing apparatus 16 (FIG. 1) so as to be concentric, for example. The thickness of the metal tube 21 is, for example, 0.5 to 1.0 mm.

  Subsequently, as in the first embodiment, the metal powder 32 is filled in the gap between the metal tube 21 and the base material 12. Then, as shown in FIG. 5 (A), as in the first embodiment, for example, from the irradiation unit 26 located outside the metal tube 21, the metal tube 21, the base material 12, and the metal powder 32 are directed. The high energy beam 22 is irradiated. There may be one irradiation unit 26 or a plurality of irradiation units 26. In order to melt a part of the metal tube 21, a part of the base material 12, and a part of the metal powder 32, the focal length and power density of the high energy beam 22 are set between the metal tube 21 and the base material 12. It is adjusted appropriately according to the distance.

  The high energy beam 22 melts and solidifies a part of the metal tube 21, a part of the base material 12, and a part of the metal powder 32, and as shown in FIG. And the convex weld metal 14 is formed between the base materials 12 (welding process). Thereafter, the metal powder 32 remaining between the metal tube 21 and the base material 12 is removed (removal step).

  When a part of the base material 12 and a part of the metal powder 32 are melted and solidified by irradiation with the high energy beam 22, the metal tube 21 is also melted and solidified. Since the metal tube 21 is configured to be thin, the metal tube 21 can be easily removed in the removal step. The removal of the metal tube 21 can be performed by machining such as cutting or shot blasting, for example. The thin metal tube 21 as the holding member is easier to handle than the transparent tube 11 used in the first embodiment.

  In the above manner, as shown in FIG. 5C, a metal member 20 having a convex weld metal 14 in which a part of the base material 12 and a part of the metal powder 32 are melted and solidified is obtained. It is done.

[Other Embodiments]
In each of the above embodiments, the convex weld metal 14 is formed perpendicular to the base material 12. However, the convex weld metal 14 may be formed obliquely with respect to the base material 12 by irradiating the base material 12 with the high energy beam 22 obliquely. The convex weld metal 14 may be formed so as to extend in a curved shape or a bent line shape other than the shape described in the above specific example, or may be formed in other shapes.

  Moreover, in the said embodiment, although the same metal as the base material 12 was used for the metal powder 32, the metal different from the base material 12 may be used. When a metal different from the base material 12 is used for the metal powder 32, the convex weld metal 14 is formed of an alloy of different metals.

  Moreover, in the said embodiment, the high energy beam 22 is made into the laser beam as an example, and the radiation | emission part 24 is comprised by the laser oscillator in this case. However, the emitting unit 24 may be configured to emit a high energy beam 22 other than a laser, such as an electron beam or a plasma beam. The convex weld metal 14 may be formed using a high energy beam 22 other than this laser.

  In the above embodiment, the focal point 22A of the high energy beam 22 is set at the position of the metal powder 32 (between the holding member such as the transparent tube 11 and the metal tube 21 and the base material 12). However, for example, if a part of the base material 12 and a part of the metal powder 32 can be melted, the focal point 22 </ b> A of the high energy beam 22 may be set to the holding member or the base material 12. In addition, when the focal point 22A of the high energy beam 22 is set to the holding member or the base material 12 in this way, a part of the holding member (limited to a material that melts like the metal tube 21), the base material 12 The molten pool 36 may be formed in a part and part of the metal powder 32, and the keyhole 40 may be formed in the molten pool 36.

  In the above embodiment, the transparent tube 11 and the metal tube 21 (holding member) and the base material 12 are appropriately moved by the drive unit 28. However, by moving the irradiation unit 26 by the drive unit 28, The energy beam 22 may be moved relative to the transparent tube 11, the metal tube 21 (holding member), the base material 12, and the metal powder 32.

  Further, solidification of the molten pool 36 formed by the high energy beam 22 is not limited to that by natural cooling. The molten pool 36 is melted by applying a metal plate or the like to at least one of the transparent tube 11, the metal tube 21, and the base material 12. The pond 36 may be actively cooled to solidify the molten pool 36 earlier.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above, and it is needless to say that the present invention can be variously modified and implemented without departing from the spirit of the present invention. is there.

DESCRIPTION OF SYMBOLS 10 ... Metal member, 11 ... Transparent tube (holding member), 11A ... Inner surface, 12 ... Base material, 14 ... Convex weld metal, 20 ... Metal member, 21 ... Thin metal pipe (holding member), 22 ... High Energy beam, 22A ... focal point, 32 ... metal powder, 36 ... molten pool (an example of a melt), 40 ... keyhole

Claims (6)

A powder filling step of filling a metal powder between a metal base material and a holding member surrounding the base material;
By irradiating the base material and the metal powder with a high energy beam from the outside of the holding member in a state where the metal powder is in contact with the base material, a part of the base material and the metal A welding step of melting a part of the powder to produce a melt, and solidifying the melt to form a convex weld metal integrally with the base material to obtain a metal member;
A removal step of removing the holding member and the remaining metal powder;
A method for producing a metal member comprising: In the welding step, the high energy beam is moved relative to the base material, the holding member and the metal powder to form the convex weld metal along the relative movement direction of the high energy beam. ,
The manufacturing method of the metal member of Claim 1. In the welding process, by irradiating the high energy beam, a molten pool as the melt is formed in a part of the base material and a part of the metal powder, and a keyhole is formed in the molten pool. While relatively moving the high energy beam,
The manufacturing method of the metal member of Claim 2. In the welding step, the high energy beam is irradiated in a state where the focus of the high energy beam is set at the position of the holding member, the base material, or the metal powder.
The manufacturing method of the metal member of any one of Claims 1-3.   The method for manufacturing a metal member according to any one of claims 1 to 4, wherein a transparent tube is used as the holding member.   The method for manufacturing a metal member according to any one of claims 1 to 4, wherein a thin metal tube is used as the holding member.

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