JP2019155390A - Method for manufacturing metal member, apparatus for manufacturing metal member, and metal member - Google Patents

Abstract

To provide a technology which suppresses an amount of used microparticles and enables a metal member with an increased enhancement amount to be obtained by a simple method.SOLUTION: A method for manufacturing a metal member 20 includes: a step (a) of continuously forming a melting section 5 where a part of the surface of a base material metal 7 and the inside region melt due to heat input from a plasma 1 and a melt recoagulation part 6 where the melting section 5 coagulates due to heat absorption from surroundings by irradiation of a part of the surface of a base material metal 7 with the plasma 1 by arc discharge; and a step (b) of projecting microparticles 4 from the melting section 5 by following the plasma 1 across the melt recoagulation part 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for strengthening the surface of a base metal by processing.

  There are various methods for strengthening the base metal, and among these methods are dispersion strengthening and work hardening. Dispersion strengthening is a technique for strengthening a base metal by dispersing fine particles such as a metal having higher strength than the base metal and ceramics in the base metal. Work hardening is a technique for strengthening a base metal by introducing strain into the crystal structure of the base metal.

  To disperse fine particles in the base metal for dispersion strengthening, for example, in casting in which a metal member is molded with molten metal, the fine particles are added to the molten metal, and the fine particles are formed in the metal member to be molded. There is a method to disperse. In addition, there is a technique in which fine particles are arranged in a layer on the surface of the base metal, the surface layer is melted with a heat source such as a laser, and the fine particles are dispersed in the surface layer of the base metal (for example, see Patent Document 1).

  In order to introduce strain into the crystal structure of the base metal for work hardening, there is a technique in which fine particles such as metals and ceramics collide with the surface of the base metal at high speed (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 2-118083 JP-A 63-256362

  In the technique of adding fine particles during casting for dispersion strengthening, it is necessary to disperse the fine particles throughout the base metal other than the portion to be strengthened in the base metal. Therefore, it is necessary to use more fine particles than the amount necessary for reinforcement. Moreover, the fluidity | liquidity of a molten metal worsens by adding a fine particle in a molten metal. Due to the deterioration of the castability, casting defects such as a casting hole and a molding defect occur.

  As in the technique described in Patent Document 1, in a technique in which fine particles arranged on the surface layer of the base metal for dispersion strengthening are dispersed on the surface layer of the base metal by a heat source such as a laser, the fine particles are uniformly layered. It is not easy to perform the previous process of arranging the Further, due to the method of melting and re-solidifying the base metal, defects such as fine voids and cracks occur in the solidified portion of the surface layer of the base metal.

  As in the technique described in Patent Document 2, in the method of causing fine particles to collide at high speed for work hardening, only the crystal structure is introduced, so that the amount of strengthening is smaller than that of dispersion strengthening.

  Then, an object of this invention is to provide the technique which can obtain the metal member which restrained the usage-amount of the fine particle and raised the reinforcement amount by a simple method.

  In the metal member manufacturing method according to the present invention, a part of the surface of the base metal is irradiated with plasma by arc discharge, and a part of the surface of the base metal and the inner region thereof are melted by heat input from the plasma. A step (a) of continuously forming a melting portion to be melted and a melt re-solidification portion in which the melt portion is solidified by heat absorption from the surroundings, and following the plasma, fine particles are melted and re-solidified from the melting portion. And a step (b) of projecting across the section.

  According to the present invention, since fine particles are projected from a molten part where a part of the surface of the base metal and the inner region thereof are melted to a melted and resolidified part where the molten part is solidified, It is possible to limit the location and reduce the amount of fine particles used.

  In addition, because it is strengthened by post-processing after forming the base metal, it is not necessary to add fine particles to the molten metal for dispersion strengthening when forming the base metal by casting. It is possible to obtain a member. A metal member can be manufactured by a simple method because a pre-process for disposing fine particles on the surface of the base metal in a uniform layer is not required for dispersion strengthening. Fine voids and cracks generated during re-solidification can be immediately filled with the projected fine particles, and the amount of reinforcement can be increased by combining dispersion strengthening and work hardening. From the above, it is possible to obtain a metal member with an increased amount of reinforcement by a simple method.

FIG. 6 is an explanatory diagram for explaining a method for manufacturing the metal member according to the first embodiment. 3 is a cross-sectional view of a metal member according to Embodiment 1. FIG. FIG. 10 is an explanatory diagram for explaining a method for manufacturing the metal member according to the second embodiment. It is sectional drawing of the metal member which concerns on Embodiment 2. FIG. FIG. 10 is an explanatory diagram for explaining a metal member manufacturing method according to the third embodiment. 6 is a cross-sectional view of a metal member according to Embodiment 3. FIG.

<Embodiment 1>
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram for explaining a method of manufacturing the metal member 20 according to the first embodiment.

  As shown in FIG. 1, the metal member manufacturing apparatus 10 is used in the manufacturing method of the metal member 20 (refer FIG. 2). The metal member manufacturing apparatus 10 includes an arc discharge device 2 and a fine particle projection device 3.

  The arc discharge device 2 includes an electrode 2a and irradiates a part of the surface of the base metal 7 with the plasma 1 by arc discharge from the electrode 2a.

  The fine particle projection device 3 includes a fine particle projection nozzle 3a, and follows the plasma 1 to project the fine particles 4 from the fine particle projection nozzle 3a at high speed. As a method for projecting the fine particles 4, air injection by compressed air or centrifugal force projection by rotating the impeller is employed, and the fine particles 4 are projected at high speed onto the base metal 7 that is a material to be strengthened. Here, the high speed is, for example, a speed of 50 m / sec or more and 100 m / sec or less.

  Various metals and ceramics can be adopted as the fine particles 4 projected at high speed. In order to achieve dispersion strengthening by dispersing the fine particles 4 inside the base metal 7, the base metal 7 A material having a higher melting point is suitable. The shape of the fine particles 4 may be any shape such as a spherical shape and a corner shape, and the shape is not limited. When the size of the fine particles 4 is excessively small, it is difficult to give strain to the crystal structure, and when it is excessively large, the surface of the base metal 7 is destroyed. Therefore, the fine particles 4 have a size of 0.05 mm or more and 5 mm or less.

  The arc discharge device 2 and the fine particle projection device 3 scan a part of the surface of the base metal 7 in the direction of the arrow in FIG. Perform particle projection. During this scanning, plasma irradiation by arc discharge is performed on a part of the surface of the base metal 7 prior to fine particle projection.

  At first, when the arc discharge device 2 irradiates a part of the surface of the base metal 7 with the plasma 1 by the arc discharge, a part of the surface of the base metal 7 and the inner region thereof by heat input from the plasma 1. Is melted to form the melted portion 5.

  The fine particle projection device 3 projects the fine particles 4 at high speed from the fine particle projection nozzle 3 a toward the melting part 5 of the base metal 7 following the plasma irradiation by the arc discharge device 2. The fine particles 4 projected at a high speed onto the melting part 5 of the base metal 7 are mixed into the melting part 5 due to the inertia generated during the high-speed projection and the flow generated by the heat input melting by the plasma 1. The melted portion 5 of the base metal 7 mixed with the fine particles 4 is solidified by heat absorption from the surroundings, and a melted and resolidified portion 6 is formed. Therefore, the melting part 5 and the melt resolidification part 6 are formed continuously. In the melt resolidification part 6, the fine particles 4 are dispersed in the solidified base metal 7, and dispersion strengthening of the base metal 7 is achieved.

  The high-speed projection of the fine particles 4 is performed not only on the melting part 5 of the base metal 7 but also on the melting and resolidification part 6 of the base metal 7. That is, the high-speed projection of the fine particles 4 is performed from the melting part 5 of the base metal 7 to the melting resolidification part 6. The fine particles 4 projected at high speed onto the melted and resolidified portion 6 of the base metal 7 introduce strain into the crystal structure of the base metal 7 and generate various lattice defects such as point defects, line defects, and surface defects. . By introducing this strain, work hardening of the base metal 7 is achieved. Further, the melted and re-solidified portion 6 of the base metal 7 has fine pores and cracks because it is melted by heat input from the plasma 1 and then re-solidified by heat absorption from the surroundings.

  By projecting the fine particles 4 at a high speed onto the melted and resolidified portion 6 in which fine voids and cracks are present in this way, a part of the surface of the base metal 7 and its inner region are plastically deformed, and before the projection The existing fine holes and cracks can be filled. Compared with the case where the fine particles 4 are projected only on the melted part 5, the base metal 7 is further strengthened by being able to fill the fine holes and cracks of the melted and resolidified part 6 in the base metal 7. Is possible. In addition, it is possible to obtain a high-quality reinforced metal member free from defects such as fine holes and cracks.

  Further, since the fine particles 4 are projected at a high speed on the base metal 7 in a softened state immediately after melting and re-solidification as compared with normal temperature, the crystal structure has a large amount compared to the case where the fine particles 4 are projected at high speed at normal temperature. Strain can be introduced, and fine holes and cracks can be easily filled.

  FIG. 2 is a cross-sectional view of the metal member 20. More specifically, it is a cross-sectional view in which the surface of the base metal 7 and its inner region are cut perpendicular to the scanning direction of the arc discharge device 2 and the fine particle projection device 3. As shown in FIG. 2, a part of the surface of the base metal 7 and its inner region are strengthened by performing the above-described plasma irradiation and high-speed projection of the fine particles 4.

  As described above, in the metal member manufacturing method according to the first embodiment, the molten resolidified portion 6 in which the molten portion 5 is solidified from the molten portion 5 in which a part of the surface of the base metal 7 and the inner region thereof are melted. Since the fine particles 4 are projected over the range, it is possible to limit the location of the base metal 7 to be strengthened and suppress the usage amount of the fine particles 4.

  In addition, since the base metal 7 is strengthened by post-processing after the base metal 7 is molded, there is no need to add fine particles to the molten metal for dispersion strengthening when the base metal 7 is formed by casting. It is possible to obtain a metal member 20 that is not present. Since the pre-process which arrange | positions the fine particle 4 on the surface of the base metal 7 in the uniform layer form for dispersion | strengthening is unnecessary, the metal member 20 can be manufactured by a simple method. Fine voids and cracks generated during re-solidification can be immediately filled with the projected fine particles 4, and the amount of reinforcement can be increased by combining dispersion strengthening and work hardening. From the above, it is possible to obtain the metal member 20 with an increased amount of reinforcement by a simple method.

  The metal member manufacturing apparatus 10 includes an arc discharge device 2 that irradiates a part of the surface of the base metal 7 with plasma 1 by arc discharge, and a fine particle projection device 3 that projects the fine particles 4 following the plasma 1. Therefore, a part of the surface of the arbitrary base metal 7 and its inner region can be easily reinforced. Thereby, the high-strength and defect-free metal member 20 can be obtained.

  The metal member 20 includes a base metal 7 and a melt resolidification part 6 formed in a state in which a part of the surface of the base metal 7 and its inner region are plastically deformed. Since the fine particles 4 dispersed in are included, the pressure resistance, impact resistance, and wear resistance are excellent. Thereby, the metal member 20 can be easily employ | adopted for the environment where these performances are calculated | required.

<Embodiment 2>
Next, a method for manufacturing the metal member 20A according to Embodiment 2 will be described. FIG. 3 is an explanatory diagram for explaining a method of manufacturing the metal member 20A according to the second embodiment. In the second embodiment, the same components as those described in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the first embodiment, a part of the surface which is a smooth surface of the base metal 7 and the inner region thereof are reinforced. However, in the second embodiment, the base metal 7 is formed on the base metal 7 as shown in FIG. The inner surface of the hole 8 and its inner region are reinforced.

  In the prior art, it is not possible to locally strengthen the inner surface of the hole and its inner region for the following reasons. In dispersion strengthening in casting, fine particles are dispersed throughout the base metal, so that it is impossible to locally strengthen the inner surface of the hole and its inner region. For dispersion strengthening, fine particles are layered on the reinforced surface of the base metal and dispersed on the surface of the reinforced surface by melting and re-solidifying with a heat source such as a laser. Since it is impossible to place, it is impossible to locally strengthen the inner surface of the hole and its inner region. In the technique in which fine particles are collided at high speed for work hardening, the fine particles are collided at high speed from an oblique direction greatly inclined from the vertical line of the surface to be reinforced with respect to the inner surface of the hole of the base metal. Therefore, it is impossible to introduce strain into the crystal structure of the base metal, and it is impossible to locally strengthen the inner surface of the hole and its inner region.

  The arc discharge device 2 and the fine particle projection device 3 perform an arc discharge inside the hole 8 of the base metal 7 by scanning in a direction along the circumference of the hole 8 of the base metal 7 (arrow direction in FIG. 3). Implement plasma irradiation and fine particle projection.

  First, holes 8 are formed in the base metal 7. The hole 8 is formed by cutting, for example. Next, when the arc discharge device 2 irradiates the plasma 1 by arc discharge in the direction along the circumference of the hole 8 of the base metal 7, the inner surface of the hole 8 of the base metal 7 by heat input from the plasma 1. And the inner area | region fuse | melts and the fusion | melting part 5 is formed.

  The fine particle projection device 3 projects the fine particles 4 at high speed from the fine particle projection nozzle 3 a toward the melting part 5 of the base metal 7 following the plasma irradiation by the arc discharge device 2. The fine particles 4 projected at a high speed onto the melting part 5 of the base metal 7 are mixed into the melting part 5 due to the inertia generated during the high-speed projection and the flow generated by the heat input melting by the plasma 1. The melted portion 5 of the base metal 7 mixed with the fine particles 4 is solidified by heat absorption from the surroundings, and a melted and resolidified portion 6 is formed. That is, the melting part 5 and the melt resolidification part 6 are formed continuously. In the melt resolidification part 6, the fine particles 4 are dispersed in the solidified base metal 7, and dispersion strengthening of the base metal 7 is achieved.

  The high-speed projection of the fine particles 4 is performed not only on the melting part 5 of the base metal 7 but also on the melting and resolidification part 6 of the base metal 7. That is, the high-speed projection of the fine particles 4 is performed from the melting part 5 of the base metal 7 to the melting resolidification part 6. Although it is impossible to introduce strain into the crystal structure of the inner surface and inner region of the hole in the base metal by high-speed projection of fine particles at room temperature as in the conventional technique, Since the fine particles 4 are projected at a high speed onto the base metal 7 which has been softened compared to normal temperature immediately after solidification, it is possible to introduce strain into the crystal structure, and various lattices such as point defects, line defects, and surface defects. Create a defect. By introducing this strain, work hardening of the base metal 7 is achieved. Further, the melted and re-solidified portion 6 of the base metal 7 has fine pores and cracks because it is melted by heat input from the plasma 1 and then re-solidified by heat absorption from the surroundings.

  By projecting the fine particles 4 at a high speed onto the melted and re-solidified portion 6 in which fine pores and cracks are present in this way, the inner surface and inner region of the hole 8 of the base metal 7 are plastically deformed, and before the projection. The existing fine holes and cracks can be filled. Compared with the case where the fine particles 4 are projected only on the melted part 5, the inner side of the hole 8 of the base metal 7 can be filled with fine holes and cracks in the melted and resolidified part 6 in the base metal 7. It is possible to further strengthen the surface and the inner region. In addition, it is possible to obtain a high-quality reinforced metal member 20A free from defects such as fine holes and cracks.

  FIG. 4 is a cross-sectional view of the metal member 20A. More specifically, a cross-sectional view of the metal member 20A in which the inner surface and inner region of the hole 8 of the base metal 7 are cut perpendicular to the scanning direction of the arc discharge device 2 and the fine particle projection device 3, that is, FIG. 3 is a cross-sectional view corresponding to a cross-sectional view taken along line AA in FIG. As shown in FIG. 4, the inner surface and the inner region of the hole 8 of the base metal 7 are strengthened by performing the above-described plasma irradiation and high-speed projection of the fine particles 4.

  As described above, in the method for manufacturing the metal member 20 according to the second embodiment, the melted and resolidified part in which the melted part 5 is solidified from the melted part 5 in which the inner surface and the inner region of the hole 8 of the base metal 7 are melted. Since the fine particles 4 are projected over 6, it is possible to limit the location of the base metal 7 to be strengthened and suppress the amount of fine particles 4 used.

  Further, as in the case of the first embodiment, it is possible to obtain a metal member 20A having good castability and no defects, and the metal member 20A can be manufactured by a simple method. Furthermore, the amount of reinforcement can be increased by combining dispersion strengthening and work hardening. From the above, it is possible to obtain the metal member 20A with an increased amount of reinforcement by a simple method.

  The metal member manufacturing apparatus 10 includes an arc discharge device 2 that irradiates the inner surface of a hole 8 formed in the base metal 7 with plasma 1 by arc discharge, and fine particle projection that projects the fine particles 4 following the plasma 1. Since the apparatus 3 is provided, the inner surface of the hole 8 of any base metal 7 and its inner region can be easily reinforced. Thereby, the high-strength and defect-free metal member 20A can be obtained.

  The metal member 20A includes a base metal 7 and a melt resolidification portion 6 formed in a state where the inner surface of the hole 8 of the base metal 7 and the inner region thereof are plastically deformed. Since the fine particles 4 dispersed inside are included, the pressure resistance, impact resistance, and wear resistance are excellent. Thereby, 20 A of metal members can be easily employ | adopted for the environment where these performances are calculated | required.

<Embodiment 3>
Next, a method for manufacturing the metal member 20B according to Embodiment 3 will be described. FIG. 5 is an explanatory diagram for explaining a metal member manufacturing method according to the third embodiment. In the third embodiment, the same components as those described in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  In the first embodiment, a part of the surface that is a smooth surface of the base metal 7 and the inner region thereof are reinforced. However, in the third embodiment, the base metal 7 is formed on the base metal 7 as shown in FIG. The inner surface of the groove 9 and its inner region are reinforced. In the conventional technique, it is impossible to locally strengthen the inner surface of the groove and its inner region for the same reason as described in the second embodiment.

  The arc discharge device 2 and the fine particle projection device 3 scan the inner surface of the groove 9 of the base metal 7 and the inner region thereof by scanning in the direction along the groove 9 of the base metal 7 (arrow direction in FIG. 5). Perform plasma irradiation and fine particle projection by arc discharge.

  First, the groove 9 is formed in the base metal 7. The groove 9 is formed by cutting, for example. Next, when the arc discharge device 2 irradiates the plasma 1 by arc discharge in the direction along the groove 9 of the base metal 7, the inner surface of the groove 9 of the base metal 7 and the inside thereof by heat input from the plasma 1. The region is melted to form the melted portion 5.

  The fine particle projection device 3 projects the fine particles 4 at high speed from the fine particle projection nozzle 3 a toward the melting part 5 of the base metal 7 following the plasma irradiation by the arc discharge device 2. The fine particles 4 projected at a high speed onto the melting part 5 of the base metal 7 are mixed into the melting part 5 due to the inertia generated during the high-speed projection and the flow generated by the heat input melting by the plasma 1. The melted portion 5 of the base metal 7 mixed with the fine particles 4 is solidified by heat absorption from the surroundings, and a melted and resolidified portion 6 is formed. That is, the melting part 5 and the melt resolidification part 6 are formed continuously. In the melt resolidification part 6, the fine particles 4 are dispersed in the solidified base metal 7, and dispersion strengthening of the base metal 7 is achieved.

  The high-speed projection of the fine particles 4 is performed not only on the melting part 5 of the base metal 7 but also on the melting and resolidification part 6 of the base metal 7. That is, the high-speed projection of the fine particles 4 is performed from the melting part 5 of the base metal 7 to the melting resolidification part 6. Although it is impossible to introduce strain into the crystal structure of the inner surface of the base metal groove and the inner region by high-speed projection of fine particles at room temperature as in the prior art, in the third embodiment, melting is not possible. Since the fine particles 4 are projected at a high speed onto the base metal 7 that has been softened immediately after re-solidification compared to normal temperature, it is possible to introduce strain into the crystal structure, and various types of defects such as point defects, line defects, and surface defects. Generate lattice defects. By introducing this strain, work hardening of the base metal 7 is achieved. Further, the melted and re-solidified portion 6 of the base metal 7 has fine pores and cracks because it is melted by heat input from the plasma 1 and then re-solidified by heat absorption from the surroundings.

  By projecting the fine particles 4 at a high speed onto the melted and re-solidified portion 6 in which such fine holes and cracks are present in this way, the inner surface of the groove 9 and the inner region of the base metal 7 are plastically deformed. It is possible to fill in fine holes and cracks existing in. Compared with the case where the fine particles 4 are projected only on the melted portion 5, the inner side of the groove 9 of the base metal 7 can be filled with the fine holes and cracks of the melted and resolidified portion 6 in the base metal 7. It is possible to further strengthen the surface and its inner region. In addition, it is possible to obtain a high-quality reinforced metal member 20B free from defects such as fine holes and cracks.

  FIG. 6 is a cross-sectional view of the metal member 20B. More specifically, a cross-sectional view of the metal member 20B obtained by cutting the inner surface of the groove 9 of the base metal 7 and the inner region thereof perpendicularly to the scanning direction of the arc discharge device 2 and the fine particle projection device 3, that is, It is sectional drawing corresponding to the BB sectional drawing of FIG. As shown in FIG. 6, the inner surface and the inner region of the groove 9 of the base metal 7 are strengthened by performing the above-described plasma irradiation and high-speed projection of the fine particles 4.

  As described above, in the metal member manufacturing method according to the third embodiment, the melted resolidified part 6 in which the melted part 5 is solidified from the melted part 5 in which the inner surface and the inner region of the groove 9 of the base metal 7 are melted. Since the fine particles 4 are projected over the range, it is possible to limit the location of the base metal 7 to be strengthened and suppress the usage amount of the fine particles 4.

  Further, similarly to the case of the first embodiment, it is possible to obtain a metal member 20B having good castability and no defects, and the metal member 20B can be manufactured by a simple method. Furthermore, the amount of reinforcement can be increased by combining dispersion strengthening and work hardening. From the above, it is possible to obtain the metal member 20B with an increased amount of reinforcement by a simple method.

  The metal member manufacturing apparatus 10 includes an arc discharge device 2 that irradiates the inner surface of the groove 9 formed in the base metal 7 with plasma 1 by arc discharge, and fine particle projection that projects the fine particles 4 following the plasma 1. Since the apparatus 3 is provided, the inner surface of the groove 9 of any base metal 7 and its inner region can be easily reinforced. Thereby, the high-strength and defect-free metal member 20B can be obtained.

  The metal member 20B includes a base metal 7 and a melt resolidification part 6 formed in a state where the inner surface of the groove 9 of the base metal 7 and the inner region thereof are plastically deformed. Since the fine particles 4 dispersed inside are included, the pressure resistance, impact resistance, and wear resistance are excellent. Thereby, the metal member 20B can be easily employ | adopted for the environment where these performances are calculated | required.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  DESCRIPTION OF SYMBOLS 1 Plasma, 2 Arc discharge apparatus, 3 Fine particle projection apparatus, 4 Fine particle, 5 Melting part, 6 Melting resolidification part, 7 Base metal, 8 hole, 9 groove, 20, 20A, 20B Metal member.

Claims (5)

(A) A part of the surface of the base metal is irradiated with plasma by arc discharge, and a molten part in which a part of the surface of the base metal and its inner region are melted by heat input from the plasma; A step of continuously forming a melt-resolidified portion where the melted portion solidifies by endotherm;
(B) following the plasma, projecting fine particles from the melting part to the melting and re-solidifying part;
A method for producing a metal member. (C) forming a hole in the base metal;
(D) The inner surface of the hole is irradiated with plasma by arc discharge, and a molten part where the inner surface of the hole and its inner region are melted by heat input from the plasma, and the molten part is solidified by heat absorption from the surroundings. A step of continuously forming a melted and re-solidified part,
(E) following the plasma and projecting fine particles from the melted portion over the melt resolidified portion;
A method for producing a metal member. (F) forming a groove in the base metal;
(G) The inner surface of the groove is irradiated with plasma by arc discharge, and a melted portion in which the inner surface of the groove and its inner region are melted by heat input from the plasma, and the melted portion is solidified by heat absorption from the surroundings. A step of continuously forming a melted and re-solidified part,
(H) following the plasma, projecting fine particles from the melting part to the melting and re-solidifying part;
A method for producing a metal member. An arc discharge device for irradiating plasma by arc discharge to a part of a surface of a base metal, an inner surface of a hole formed in the base metal, or an inner surface of a groove formed in the base metal;
A fine particle projection device for projecting fine particles following the plasma;
A metal member manufacturing apparatus comprising: With base metal,
A part of the surface of the base metal and the inner region thereof, the inner surface of the hole formed in the base metal and the inner region thereof, or the inner surface of the groove formed in the base metal and the inner region thereof are plastic. A melt re-solidification part formed in a deformed state;
With
The molten resolidified part is a metal member including fine particles dispersed therein.

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