JP2000026902A - Metallic sintered compact and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a metallic sintered compact having strength, wear resistance, durability, and fluorescent characteristic. SOLUTION: This metallic sintered compact 1 contains many kinds of metal powders 2, composed of stainless steel, etc., and adhering to each other, and a fluorescent substance 4 which is composed of a host crystal of SrO.1.75 (Al, B)2O3 and an activator of Eu and Dy dispersed in it and is provided at least along the outside periphery of a group of the metal powders 2. Further, the metallic sintered compact 1 has a fluorescent characteristic emitting a visible ray after lights-out and at the time of power failure. Moreover, as the method of manufacturing the metallic sintered compact 1 being small in size and having a complicated shape and a dense structure and also having strength, wear resistance, and durability, the metal powders 2 and the fluorescent substance 4 are mixed (S1) in the prescribed ratio, and the resultant mixture is compacted (S2) and then sintered (S3) at about 1200 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to strength, wear resistance,
The present invention relates to a metal sintered body having durability and fluorescence, and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, luminous timepieces and luminous safety articles using fluorescent paint mixed with fine phosphors, such as construction and security jackets and armbands, or display articles indicating the presence of a broken vehicle, have been developed. Widely used. The phosphor includes a base material crystal made of a metal oxide or zinc sulfide and an activator or a luminescent center dispersed therein. The phosphor is excited by absorbing short-wavelength components such as sunlight and ultraviolet rays emitted from a fluorescent lamp, and emits visible light for a long time at night or after being turned off.

In the above-mentioned fluorescent paint, a phosphor is fixed to a resin sheet, a resin plate or the like via a resin coating or a powder coating.
For this reason, when some external force is applied to the coating film, there is a problem that the coating film is cracked or torn, and peels off from the resin sheet or the like. In addition, since the fluorescent paint is difficult to be applied with a uniform thickness to the surface of an article having a small and complicated shape, and the film thickness tends to vary, the light emitting state also varies, and the complicated There is also a problem that the work of applying to a shaped article is troublesome and tends to be expensive.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in the prior art and to provide a metal sintered body having strength, wear resistance, durability and fluorescence and a method for producing the same. And

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been made based on an idea that a phosphor is treated in the same manner as a metal powder in a powder metallurgy method or a metal powder injection molding method. . That is, the metal sintered body of the present invention includes a large number of metal powders that are in close contact with each other, and a phosphor disposed at least along the outer periphery of the metal powder group, and has a required shape and fluorescence. It is characterized by the following. According to this, a large number of metal powders that are in close contact with each other, and a phosphor (powder) is contained in the outer periphery, particularly in the recesses or pores (pores) adjacent to each other, and is sintered into a predetermined shape. Thus, a metal sintered body having strength, wear resistance, durability, and fluorescence can be provided. The phosphor is desirably smaller than the metal powder.On the other hand, using a metal powder having a small diameter and a phosphor powder having a larger diameter than the metal powder, the outer periphery and the inner portion of the sintered body in which the metal powders are in close contact with each other. The phosphor powder may be closely attached to the gap.

[0006] The metal powder may be iron powder, Ni powder, C
o powder, or a powder mixture thereof, alloy steel powder, stainless steel powder, corrosion-resistant alloy powder, or magnetic alloy, and / or the phosphor has low reactivity when sintered with the metal powder. Also includes metal sintered bodies. Thereby, it is possible to provide a metal sintered body made of various metals or alloys and having both its properties and fluorescence. The metal powder also includes nonmagnetic alloy steel, stainless steel, and magnetic alloys containing rare earth elements.

Further, the phosphor is SrO.1.75 (Al,
B) A metal sintered body comprising a base crystal of ₂ O ₃ and an activator composed of any combination of Eu and Dy or Eu and Ho dispersed therein is also included. That is, an inorganic phosphor is used as the phosphor. Further, a metal sintered body in which the volume ratio of the phosphor is in the range of 5 to 60% with respect to the metal powder is also included. According to these, it is possible to obtain a metal sintered body having stable and reliable fluorescence (powder) without reacting with the metal powder or the like by sintering. If the volume ratio of the phosphor is less than 5%, the degree of fluorescence may be insufficient. If the volume ratio exceeds 60%, the strength of the sintered body starts to decrease and the cost increases. It is. Therefore, a desirable range of the volume ratio is 10 to 50%, more preferably 1 to 50%.
5 to 40%.

Further, the metal sintered body is used for a key holder, a key receiving member, a coin receiving member, a switch, a switch panel, a knob, a stopper, a lid, a handle, a handle, a handrail, a fence, a chain. Materials, wristwatch hands, wristwatch dials, wristwatch side pieces, fishing float parts, rings, bracelets, decorative pieces for collars,
Statues, monuments, vehicle mark materials, vehicle decoration materials, nameplates, display boards, signboards, text materials, road surface guide studs, floor guide studs,
A metal sintered body that is any of display materials, sports equipment, and climbing equipment is also included.

According to this, a key, a keyhole, a coin slot, a switch, a clock, and the like can be reliably recognized even at night or in the dark. In addition, a handle, a knob, a handrail, a fence, a road guide stud, or a chain for a fence can be similarly recognized, and the safety of residents and passersby can be ensured. Furthermore, it contributes to improvement of fashionability and prevention of loss in decorative articles such as rings and collars. In addition to expressing the presence of statues and monuments at night, it can also contribute to increasing their artistic value. Furthermore, by using it for a vehicle mark material, a nameplate, a display board, a signboard, and the like, it is possible to emphasize its existence and enhance the form and image.

In addition, the present invention is applied to sports equipment used for various sports outdoors or outdoors, for example, a display member of a class country or a marathon runway, a display member of a mountain climbing road, or a climbing metal fitting for a rocky area, so as to be safe at night or the like. Can be achieved. That is, by being exposed to sunlight or a fluorescent lamp, visible light in a shape following the outline of the sintered body is emitted at night or after the light is turned off. Therefore, it is possible to perform functions such as display and guidance according to the above-mentioned applications while saving energy.

On the other hand, the present invention provides a method for producing a metal sintered body, which comprises a step of mixing a metal powder and a phosphor, a step of molding the obtained mixture, and a step of sintering the obtained molded body. A method is also provided. Thereby, after mixing the metal powder and the phosphor (powder) at a predetermined ratio, for example, only by pressing and shaping into a required shape and sintering, it has strength, wear resistance, durability, and fluorescence. A metal sintered body can be reliably and efficiently manufactured.

[0012] The present invention also includes a method for producing a metal sintered body, wherein a binder is further mixed in the mixing step. Further, the step of molding the mixture is a step of injection molding, including a step of degrease the molded body obtained immediately thereafter,
A method for manufacturing a metal sintered body is also included. According to these, for articles having a relatively small size and complicated shape,
By using a phosphor in combination with the metal powder injection molding method, it is possible to provide a metal sintered body in which strength, abrasion resistance, durability, and fluorescence are surely imparted. Immediately after the degreasing, calcination may be performed and pre-sintered to maintain the product shape before sintering. However, the shape may be maintained and the calcination may be omitted by leaving a small amount of binder by degreasing.

[0013] In addition, the present invention provides a method for producing a metal sintered body, comprising: applying (immersing) a slurry containing a mixture of a metal powder and a phosphor to the surface of a metal molded product; A manufacturing method is also proposed. The baking is to bake a metal powder or the like on the surface of the molded product. Also, a step of impregnating (immersing) the slurry of the phosphor into the surface of a metal powder press-molded article or injection-molded article, and thereafter only sintering, or a step of sintering after degreasing, A method for producing a metal sintered body is also proposed. Further, a metal sintering method includes a step of obtaining a sintered product by press-molding or injection molding and sintering the metal powder, and a step of impregnating (immersing) the surface of the sintered product with the slurry phosphor powder. A body manufacturing method is also proposed. still,
The sintering may include the calcination at a preceding stage. According to these, since the phosphor (powder) can be thinly coated on the surface of a separately formed metal molded product or the same sintered product, a fluorescent metal sintered body can be reliably manufactured with high dimensional accuracy, and The amount of phosphor used can also be reduced and provided inexpensively.

[0014]

Preferred embodiments of the present invention will be described below with reference to the drawings. In the metal sintered body 1 of the present invention schematically shown in FIG. 1 (A), a large number of metal powders 2 adhere to each other, and the outer periphery thereof, in particular, the recesses and the internal gaps where the metal powders 2 are adjacent to each other. And a small-diameter phosphor 4 that is in close contact. The metal sintered body 1 has a shape corresponding to a predetermined application, and also has a fluorescent property of emitting light in the dark by a large number of phosphors 4. The metal powder 2 is, for example, an austenitic stainless steel (17 wt% Cr-13 wt% Ni-2.5 wt)
% Mo-remaining Fe), after water atomizing, classifying the particles to 100 mesh or less by a sieve (not shown) to have an average particle size of about 8
It is set to 0 μm or less. The phosphor 4 has, for example, an average particle size of about 20 μm and SrO · 1.75 (Al, B) ₂ O
₃ and a Eu and Dy activator dispersed therein.

A metal sintered body 6 of a different form schematically shown in FIG. 1B has a large number of metal powders 2 in close contact with each other and an outer periphery thereof, in particular, a recess in which the metal powders 2 are adjacent to each other. And a small-diameter phosphor 4 closely adhered to the metal powder 2. The phosphor 4 does not exist in an internal gap (pore) between the metal powders 2. The reason why the phosphors 4 are arranged only along the outer periphery of the group of metal powders 2 is due to a manufacturing method described later. The metal sintered body 6 also has a shape according to a predetermined use, and has a fluorescent property of emitting light in the dark by a large number of phosphors 4. Further, a metal sintered body 10 of another form schematically shown in FIG. 1 (C) has a sintered body (metal powder group) 8 in which a large number of fine metal powders 2 are in close contact with each other, and has And the phosphor 4 located there. The metal powder 2 has a smaller diameter than the phosphor 4, and becomes a sintered body 8 (10) having a precise shape and structure by a metal powder injection molding method described later. still,
The metal sintered body 10 also has a fluorescent property that emits light in the dark by the phosphor 4 on the outer periphery.

FIG. 2 relates to a method for producing a metal sintered body having fluorescence of the present invention. FIG. 2A shows a flowchart of the manufacturing method according to the powder metallurgy method. First, as shown in FIG. 2 (B), a powder of a phosphor 4 having a smaller diameter than the metal powder 2 is mixed at a ratio of 5 to 60 vol% (S1). The mixture obtained by adding a lubricant is filled in a mold, and a pressure of several 100 kg / cm ² to about 10 ton / cm ² is applied to form a predetermined shape (S2). Further, the obtained molded body is heated to about 1000 ° C. to 1400 ° C. in a vacuum or an inert atmosphere, and is heated for 1 to several hours, thereby obtaining FIG.
As shown in (C), a metal sintered body 1 can be obtained.
(S3). Since the sintered body 1 can have a sintered density of 85% or more, it has high strength, abrasion resistance, and durability, and can emit light over a long period of time in an arbitrary shape.
The phosphor 4 hardly reacts at the time of sintering, and partially enters the surface or the recess of the metal powder 2 softened at the time of sintering, thereby firmly adhering to the metal powder 2.

FIG. 2D is a flowchart of a manufacturing method according to the metal powder injection molding method. First, as shown in FIG. 2 (E), the fine metal powder 2 having an average particle diameter of 10 μm or less has a relatively large diameter of about 20 μm and a diameter of 5 μm.
〜60 vol% of the phosphor 4 and 5９9 wt% of the binder are mixed (s1) with stirring. Such a mixture is injected into a mold having a cavity therein, and receives a pressure of several hundred kg / cm ² , thereby forming a molded body into a predetermined three-dimensional shape following the cavity (s2). After heating the obtained molded body to about 200 ° C. to 500 ° C. and performing degreasing (s3) for removing the binder, the molded body is further heated to about 800 ° C. to maintain its shape.
It was calcined at ℃ (s4).

Next, in a vacuum or in an inert atmosphere, about 10
When heated to 00 ° C. to 1400 ° C. and held for one to several hours, as shown in FIG. 2 (F), the sintered body (metal) was sintered so that the binder disappeared and many fine metal powders 2 were aggregated. With the powder group 8, a metal sintered body 10 in which a large number of phosphors 4 are firmly adhered to the surface and in the internal gap is obtained.
(s5). The obtained sintered body 10 has a sintering density of 95%
Thus, the phosphor 4 adheres to the outer periphery and the inside, and exhibits a fluorescent property. In addition, even if the surface of the sintered body 10 is worn, the inner phosphor 4 is always exposed to the outer periphery at a constant rate,
Light emission over a long period of time becomes possible. Such fine metal powder 2
By performing injection molding using, a sintered body 10 having a small and precise shape, and having strength, abrasion resistance, and durability can be obtained.

FIG. 3A shows a flowchart of a method of manufacturing a metal sintered body having a different form. A metal molded product having a required shape and dimensions is prepared in advance (S1). This metal molded product includes, besides a metal sintered body, a press molded product, a forged product, or a cast product whose surface is roughened as necessary. Separately, metal powder 2 having an average particle size of several μm and phosphor 4 having an average particle size of several tens μm are mixed at a ratio of 5 to 60 vol% (S2), and water and methylcellulose are mixed to form a slurry (S3). Next, the metal molded product is immersed in the slurry (S4), and the surface is coated with the slurry. Then, the metal molded product having the surface coated with the slurry is heated and baked so that the slurry becomes a sintered body (film) (S5). Thereby, for example, the metal sintered body 6 shown in FIG. 1B can be obtained in which the phosphor 4 adheres only to the outer periphery. According to such a manufacturing method, a metal molded product having a desired shape and size and formed in advance by a manufacturing method suitable for its characteristics and the like can be used, and its surface can be efficiently covered with a small number of phosphors 4. The metal sintered body 6 having the property can be provided reliably and at low cost.

FIG. 3B shows a flowchart of a method of manufacturing a metal sintered body having a further different form. First, the metal powder 2 is put into a mold together with a lubricant or a binder and press-molded, or injection-molded into the mold and sintered to form a molded (sintered) product (s).
1). In the case of an injection-molded product, it is degreased after its molding, calcined at about 800 ° C., and then sintered. On the other hand, water and methylcellulose are mixed with the phosphor 4 having an average particle diameter of about 10 μm to form a slurry (s2). The molded article is immersed in the slurry (s3), and the phosphor 4 is attached and penetrated into the outer periphery and the gap. Then, fats and oils in the slurry are degreased (s4).
After sintering (s5). According to this manufacturing method, the metal sintered body 6 shown in FIG.
A sintered body similar to the sintered body 10 shown in (C) is obtained.

FIG. 3C is a flowchart of a method for manufacturing a metal sintered body of another embodiment. First, the metal powder 2 is put into a mold together with a lubricant or a binder, press-molded, or injection-molded (s1) into the mold, and then the obtained molded body is sintered.
(s2) to obtain a sintered product. In the case of an injection molded product, the above sintering (s2) is performed after degreasing and / or calcination. On the other hand, a slurry is prepared by mixing water and methylcellulose with the phosphor 4 having an average particle diameter of about 10 μm. The sintered product is immersed in the obtained slurry (s3), and the phosphor 4 is attached to the surface and in the gap.
Let me enter. Thereby, the phosphor 4 is held thin along the outer periphery, and a metal sintered body similar to the metal sintered bodies 6 and 10 shown in FIGS. 1B and 1C having a fluorescent property can be obtained. it can.

[0022]

Embodiment 1 Here, an embodiment based on the manufacturing method shown in FIG. 2A will be described. For a metal powder 2 made of stainless steel (SUS316L) having an average particle size of 75 μm, a phosphor (SrO · 1.75 (Al, B) ₂ ) having an average particle size of 19.9 μm was used.
O ₃ : Eu, Dy / a product of Nichia Corporation; ULTRA
GLOW; NP-2820-01)
0% by volume and 1% by weight of zinc stearate
The mixture was further stirred to obtain a mixture (S1). The three mixtures are filled into a mold having a cylindrical cavity, and 5 tons / c
m ² and 7 tons / cm ² under pressure (S
2).

The obtained three molded bodies are degreased in a vacuum at 500 ° C., heated to 1200 ° C. in a vacuum, and held for one hour to obtain a fluorescent material having a diameter of 11 mm and a height of 10 mm. Metal sintered body 1 having (S
3). These sintered densities were as dense as about 80 to 86%, and the same strength as a normal sintered body could be confirmed. In addition, as a result of placing each of the sintered bodies 1 in a dark room and observing them visually, the mixing ratio of the phosphors 4 was proportional to the emission intensity. From this result, the phosphor 4 hardly reacts at the time of molding or sintering.
It turned out that it adhered firmly to the surface of the dense sintered body.

[0024]

Embodiment 2 Next, an embodiment according to the manufacturing method shown in FIG. 2D will be described. For fine metal powder 2 made of stainless steel (SUS316L) having an average particle size of 8.8 μm,
Powders of the phosphor 4 having a larger average particle diameter of 20.5 μm are mixed at 10, 20, and 30 vol%, respectively, and 7.5 wt% of a polypropylene wax is added as a binder and kneaded (s1). Different types of pellets were obtained.
Each of these pellets is individually injection-molded into a 10 mm long, 8 mm diameter cylindrical cavity inside a mold.
(s2).

The obtained three compacts were placed in a nitrogen atmosphere at 4
After heating at 00 ° C for 3 hours to degrease (s3), each was calcined at about 800 ° C (s4). Thereafter, the mixture was heated to 1350 ° C. for 3 hours in an argon atmosphere and sintered (s).
By performing 5), three metal sintered bodies 10 shown in FIG. 2F having a shape similar to that of the cavity were obtained. Each sintered body 1
The density of 0 is 95.2 when the phosphor 4 is 10 vol%.
%, 20vol%, 93.6%, and 30vol%, 91.1%, which is inversely proportional to the phosphor 4 content. The corresponding emission intensity was confirmed. As a result of observation with a metallurgical microscope, the powder of the phosphor 4 did not react in adjacent dents or gaps (pores) between the metal powders 2 (sintered bodies 8) constituting the sintered body 6 without any reaction. It was confirmed that it remained.

[0026]

Embodiment 3 Next, an embodiment according to the manufacturing method shown in FIG. 3A will be described. A metal powder 2 made of stainless steel (SUS316L) having an average particle diameter of 75 μm and zinc stearate (lubricant) are mixed, filled in a mold, and charged to 7 ton / cm ^2.
Press molding at 500 ° C and dewaxing at 500 ° C.
By heating and sintering in vacuum at 00 ° C. for 1 hour, a sintered body (metal molded product) having a diameter of 11 mm and a height of 10 mm was obtained.
(S1). Separately, with respect to the same stainless steel powder 2 having an average particle size of 8 μm, the average particle size was 19.9 at a rate of 30 vol%.
The same phosphor 4 as described above was mixed (S2), and water and methylcellulose were mixed into a slurry (S3). The sintered body was immersed in the slurry under reduced pressure (S4), the phosphor 4 was adhered to the outer peripheral surface thereof, and then baked by heating at 1200 ° C. for 1 hour in a vacuum (S5). The obtained metal sintered body was the same as the metal sintered body 6 shown in FIG. 1 (B), and the density was as high as about 87% and the light emission intensity was the same as that of the phosphor 4 in Example 1 above. It was equivalent to that used at the same rate.

[0027]

Embodiment 4 Next, an embodiment according to the manufacturing method shown in FIG. 3B will be described. A metal powder 2 made of stainless steel (SUS316L) having an average particle size of 75 μm is mixed with zinc stearate (lubricant), filled in a mold, and charged to 7 ton / c.
Press molding (s1) was performed at a pressure of m ² . Obtained diameter 11m
A molded product having a height of 10 mm and a height of 10 m was impregnated (s3) into a slurry (s2) containing the same phosphor 4 prepared separately above. After taking out from this slurry and degreasing the oils and fats and water in the slurry at 400 ° C. (s4), the slurry is heated to 1200 ° C. in vacuum.
Sintering (S5) of heating for a time was performed. The obtained metal sintered body is the same as the metal sintered body 6 shown in FIG.
The density was as dense as about 87%, and the emission intensity was almost the same as that in Example 1.

[0028]

Embodiment 5 Further, an embodiment according to the manufacturing method shown in FIG. 3C will be described. A metal powder 2 made of stainless steel (SUS316L) having an average particle diameter of 75 μm and zinc stearate (lubricant) are mixed, filled in a mold, and charged to 7 ton / cm ^2.
Press forming (s1). Obtained diameter 11mm
Then, the compact having a height of 10 mm was sintered (s2) by heating at 1200 ° C. for 1 hour in a vacuum. This sintered product was impregnated (s3) under reduced pressure into a slurry containing the same phosphor 4 as that prepared above. The metal sintered body taken out from this slurry is the same as the metal sintered body 6 shown in FIG.
The density was as dense as about 87%, and the luminous intensity was almost the same as that in Example 1.

FIGS. 4 and 5 show the sintered metal bodies 1, 6, and 5 of the present invention.
10 relates to the application to which it applies. FIG. 4A shows a coin receiving fitting 12 of a vending machine or the like, which is a fluorescent metal sintered body having a loading port 14 formed on a curved surface 13 along the periphery of the coin. Thus, the surface of the metal fitting 12 emits light even in the dark, so that the user can easily recognize the charging port 14. Also,
FIG. 4B shows a knob 16 such as a door, and a keyhole 17 at the center thereof.
Is provided. Here, FIG.
As shown in FIG. 4B, a thin lock cap 19 having a keyhole 17 formed of a metal sintered body 1 or the like is formed and fixed to the outside of the lock 18, as shown in FIG. Keyhole 17 even in the dark
Can be raised.

Further, as shown in FIG. 4C, a switch board 20 having a plurality of switch holes 21 is formed of the metal sintered body 1 or the like, and as shown in FIG. When the switch 22 or the plug 22 protruding from the upper surface is formed of the metal sintered body 1 or the like, these can be raised even in the dark, which is convenient for the user especially in an emergency or the like. Also,
As shown in FIG. 4 (E), floor guide studs 25 in a building or facility
Also, when the thin fluorescent metal sintered body 24 is fixed to the main body except for the lower bolt 26 or at least to the top surface of the main body as shown in the figure, the user can be safely guided in the event of a power failure due to a disaster or the like. . In this case, the main body and the fluorescent metal sintered body 2
4 can also be oval. Further, as shown in FIG. 4F, a hemispherical fluorescent metal sintered body 28 is fixed to the upper end of the bollard pole 27, or as shown in FIG.
Even if the chain member 32 suspended between the columns 31 in the guide fence 30 is formed of the fluorescent metal sintered body 1 or the like, safety can be achieved by the same guidance as described above.

FIG. 5A shows a wristwatch hand 34 formed of a fluorescent metal sintered body 1 or the like. When this hand is used in a wristwatch, the hand 34 itself emits light, so that even if there is no illumination, the time of day can be obtained. You can check. In addition, a fluorescent metal sintered body 1 is attached to a wristwatch dial (not shown) or its outer peripheral side (time character / display part).
The time can be easily confirmed in the same manner by using such a method. As shown in FIG. 5B, when the wristwatch side piece 36 integrally having the convex portion 37 and the concave portion 38 in which the pin holes 39 are formed is formed of the fluorescent metal sintered body 1 or the like, Even if the whole connected wristwatch side is dark, it emits light, so that the position of the wristwatch can be easily confirmed, and it is possible to add fashionability and accessory effects.

Further, as shown in FIG. 5C, a decorative portion 44 made of the fluorescent metal sintered body 1 or the like is provided on the surface of the key holder 41, the pendant 41, or the pedestal 42 connected to a part of the collar 41. As shown in FIG. 5D, the jewelry table 47
Is formed integrally with the metal sintered body 1 or the like,
In addition to the case of the original design, the accessory also changes depending on the light and darkness, and it is possible to further enhance fashionability. The needle 34, the side piece 36, the decorative part 4
For small items such as the ring 4 and the ring 46, the production method by injection molding shown in FIG.

Further, as shown in FIG.
5 or only the character portion 49 'as shown in FIG. 5 (F) is a fluorescent metal sintered body (including a magnet) 1
Thus, it is possible for a night visitor to easily confirm a resident even if there is no nearby lighting, and to create a mysterious and fantastic atmosphere. still,
If the nameplate 48 is used as a display board of a company or facility, or a signboard of a store or the outdoors, the display effect is maintained even after the lights are turned off, so that energy saving and location display or advertisement can always be made possible. Further, as shown in FIG. 5 (G), at least only the decorative portion 51 of the monument 50 in which the decorative portion 51 imitating the earth is fixed on the pedestal 52 is formed of the metal sintered body 1 or the like. Since the light is emitted even after the light is turned off outdoors or in a park, it is possible to create a fantastic and fantasy atmosphere.
Such an effect can also be obtained by applying it to a statue, a Buddha statue, a trophy, a monument, or a main pillar attached to a bridge fence.

The fluorescent metal sintered body according to the present invention may further include a cover material, a handle fitting, a handle fitting, a handrail, a fishing float top part (part), and a vehicle mark. It can also be applied to (flat or three-dimensional symbol marks), vehicle decorative materials (front grill material, side decorative pieces, etc.), and various display materials. In addition, sports equipment such as discs, shots, hammers, crossbars, goals, snow poles, etc .; climbing equipment such as harkens, carabiners, portable ladders, chains, crampons, and pickle shafts; It is possible to apply.

[0035]

According to the fluorescent metal sintered body of the present invention described above, the metal sintered body has any shape and size, and has strength, abrasion resistance, and durability.
It can be a metal sintered body that emits light according to its shape at night or in the dark. Further, according to the method for manufacturing a metal sintered body of the present invention, it is possible to reliably manufacture and provide a metal sintered body having the above-described fluorescence without adding much effort to the steps up to now. it can. Further, claims 6 to 8
According to the production method described in (1), the metal powder is injection-molded with the binder in the form of a metal powder, whereby a metal sintered body having a small size and a precise shape and having fluorescence can be reliably provided. In this case, if the average particle size of the metal powder is smaller than that of the phosphor, the shape of the sintered product can be further refined. Further, according to the method for manufacturing a metal sintered body according to the ninth to eleventh aspects, a metal sintered body in which a phosphor is closely adhered only near the surface can be easily and inexpensively provided.

[Brief description of the drawings]

FIGS. 1A to 1C are cross-sectional views schematically showing respective metal sintered bodies of the present invention.

FIGS. 2A and 2D are flowcharts showing each method of manufacturing a metal sintered body according to the present invention, and FIGS. 2B, 2C, 2E, and 2F are schematic diagrams showing each of those steps. FIG.

FIGS. 3A to 3C are flowcharts showing a method of manufacturing a metal sintered body having different modes.

4 (A), (B), (B ′), (b) and (C) to (G) are schematic diagrams showing respective uses and functions of a metal sintered body.

FIGS. 5A to 5G are schematic diagrams showing respective uses of a metal sintered body.

[Explanation of symbols]

 1, 6, 10 Metal sintered body 2 Metal powder 4 Phosphor 8 Sintered body (metal powder group) 12 Metal coin receiving fitting (metal Sintered body 20 Switch board (Sintered metal body) 34 Needle for watch (Sintered metal body) 48 Nameplate (Sintered metal body) 50 Monument ( (Metal sintered body)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4K018 AB01 AB10 AC01 BA04 BA14 BA15 BA16 BA17 BC12 CA07 CA29 CA33 DA01 DA03 DA19 FA45 JA24 KA25 KA32 KA42 KA57 KA58 KA70 4K020 AB01 AC06 AC07 BB29 BC03

Claims (11)

[Claims] 1. A metal comprising a plurality of metal powders which are in close contact with each other, and a phosphor disposed at least along the outer periphery of the group of metal powders, and having a required shape and fluorescence. Sintered body. 2. The method according to claim 1, wherein the metal powder is iron powder, Ni powder, Co powder,
Alternatively, a mixed powder thereof, an alloy steel powder, a stainless steel powder, a corrosion-resistant alloy powder, or a magnetic alloy powder, and / or the phosphor has low reactivity when sintered with the metal powder. The metal sintered body according to claim 1, wherein: 3. The method according to claim 1, wherein the phosphor is SrO.1.75 (Al, B) _2.
The metal sintered body according to claim 1, comprising a host crystal of O ₃ and an activator dispersed in the host crystal and formed of any one of Eu and Dy or Eu and Ho. . 4. The metal sintered body according to claim 1, wherein a volume ratio of the phosphor is in a range of 5 to 60% with respect to the metal powder. 5. The metal sintered body is used for a key holder, a key receiving member, a coin receiving member, a switch, a switch panel, a knob, a stopper, a lid, a handle, a handle, a handrail, a fence, a chain. Materials, wristwatch hands, wristwatch dials, wristwatch side pieces, fishing float parts, rings, arm rings, decorative pieces for collars, statues, monuments, vehicle mark materials, vehicle decoration materials, nameplates, display boards, Signboards, text materials, road guide studs, floor guide studs,
The metal sintered body according to any one of claims 1 to 4, wherein the metal sintered body is any one of a display material, sports equipment, and climbing equipment. 6. A method for producing metal sintering, comprising: a step of mixing a metal powder and a phosphor; a step of molding the obtained mixture; and a step of sintering the obtained molded body. Method. 7. The method for producing a metal sintered body according to claim 6, wherein a binder is further mixed in the mixing step. 8. The metal sintered body according to claim 7, wherein the step of molding the mixture is a step of injection molding, and the step of degrease the molded body obtained immediately thereafter. Production method. 9. A method for producing a metal sintered body, comprising: a step of applying a slurry containing a mixture of a metal powder and a phosphor to a surface of a metal molded product; and a step of baking thereafter. 10. A process for impregnating a surface of a press-molded or injection-molded product of a metal powder with a slurry of a phosphor, and thereafter only sintering, or sintering after degreasing. A method for producing a metal sintered body, comprising: 11. A method comprising press-molding or injection-molding a metal powder and sintering to obtain a sintered product; and impregnating the surface of the sintered product with a slurryed phosphor powder. A method for producing a metal sintered body characterized by the following.