JP2002363715A - Highly corrosion resistant, highly absorptive porous sintered alloy body and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively perform the perfuming action or the refilling (replenishing) action of sufficiently impregnated liquid perfume or the like by increasing the porosity and keeping the inside of the pores clean for a log period without damaging the appearance of a product in a manufacturing process of the product by using a porous sintered alloy which is based material of a perfuming metallic product. SOLUTION: In the manufacturing process of the product, it is confirmed experimentally that SUS 316L having 18 to 25% porosity in a porous sintered alloy stainless steel is optimum when the limitation of individual physical properties and strength of a base material are considered. The impregnation, the perfuming and the refilling action are smoothly performed and the durability is increased by sintering and forming the alloy powder with binder by heating and pressurizing and then removing residual water on the wall surface of the pore and applying an organic protective film on the wall surface by the use of a metal corrosion inhibitor.

Description

DETAILED DESCRIPTION OF THE INVENTION

TECHNICAL FIELD The present invention relates to a product applied with a corporate logo,
Information and communication equipment (mobile phones, notebook computers, PDAs)
The present invention relates to materials for accessories for attachment to the like, automobile accessories, fancy articles, pet accessories, and the like.

[0002]

2. Description of the Related Art A conventional porous sintered alloy product has a porosity of 5%.
Since it is about 10 to 10%, the absorption rate of liquid fragrance and the like is low, and it is difficult for a general user to easily refill. In addition, since the material is SUS304L, if a liquid fragrance is present inside the pores for a long time, there is also a disadvantage that it causes corrosion.

[0003]

The porosity is increased within a range that does not impair the aesthetics of the porous sintered alloy, and at the same time, water remaining on the inner surface of the pores is removed, and liquid fragrances and the like to be impregnated with them are removed. The purpose is to increase the injection rate and the amount thereof, and to prevent corrosion of the sintered alloy as the main body and increase the durability thereof.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the problems of the porous sintered alloy products constituting the conventional metal accessories having a fragrance effect as described above. Using SUS316L powder with higher durability and porosity of 18 to 25% to produce a superabsorbent porous sintered alloy body, and also on the inner wall of all pores to further increase corrosion resistance Remove residual moisture, then apply a sealing treatment to prevent rust by covering the inner wall of all pores, and impregnate the pores with various liquid fragrances, deodorants or fragrance treatments It is an object of the present invention to provide a product and a method for producing a highly corrosion-resistant and highly-absorbent porous sintered alloy body which has a long period and can be easily refilled.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to achieve the above objects, the present invention improves the absorbency of a porous sintered alloy body, facilitates refilling, and at the same time, without impairing the inherent gloss characteristics of a metal surface. The average particle size is 100 to 15 having high corrosion resistance and durability so that the porosity is in the range of 18% to 25%.
0 μm SUS316L powder and binder (Bind)
er) is mixed with about 0.5% of the weight of the powder, and the mixture is mixed at room temperature with 390 to 490 Mp.
After molding at a pressure a, pre-sintering is performed at a temperature in the range of 780 to 850 ° C. for 90 to 100 minutes to remove the binder.
Next, in a reducing atmosphere or a vacuum atmosphere,
A porous sintered alloy body is manufactured by sintering at a temperature in the range of 200 ° C. for 90 to 100 minutes, and benzotriazole, which is a metal corrosion inhibitor, is used to improve the corrosion resistance of the manufactured porous sintered alloy body. After immersion in a 3 to 5% aqueous solution of C ₆ H ₅ N ₃ ) to remove residual moisture in the pores and perform a so-called sealing treatment of coating an organic protective film having a thickness of about 50 mm on the metal surface and all pore inner wall surfaces. And various liquid fragrances.

Hereinafter, a highly corrosion-resistant and highly-absorbent porous sintered alloy according to the present invention and a method of manufacturing the same will be described in detail with reference to the process flow chart shown in FIG.

The final porosity of the highly corrosion-resistant and highly absorbent porous sintered alloy according to the present invention is most preferably 18% to 25%. The reason for this is that if the porosity of the porous sintered alloy body is set to 18% or less, the absorbability of the liquid fragrance and the like is reduced, making impregnation and refilling of the liquid fragrance difficult, and the porosity to 25% or more. As a result, it was found that, in appearance, the inherent glossiness of the metal surface was reduced, the formability was also reduced, and the strength was significantly reduced.

Accordingly, it has been confirmed that it is best to maintain such porosity in the present invention.
SUS316L powder having a thickness of μm was used, and SUS316L having high corrosion resistance and strength was used in order to improve the corrosion resistance and durability of the highly absorbent porous sintered alloy body.

In order to form a high-strength stainless steel, a binder is always added. At this time, the binder to be added is Akrawax, which is added up to 0.5% of the weight of the stainless steel powder. It is necessary to sufficiently mix and homogenize with a mixer so that the binder is not biased to any part of the molded body after molding.

Next, these mixed powders are added at room temperature to 39.
After the compact is manufactured by biaxial pressing at a pressure of 0 to 490 Mpa, first, primary pre-sintering is performed to remove the binder. The pre-sintering is performed at a temperature in the range of 780 to 850 ° C. for 90 to 1 so that the binder is removed by complete combustion.
Run for 00 minutes.

After the above-mentioned primary pre-sintering, a secondary pre-sintering is carried out to prevent oxidation of the sintered compact, and there are two methods. Sintering is performed for 90 to 100 minutes in a reducing atmosphere such as a mixed gas of methane and methane or a mixed gas of nitrogen and hydrogen, an ammonia decomposition gas, or a vacuum atmosphere at a temperature of 1,140 to 1,200 ° C. for 90 to 100 minutes. At this time, if the sintering temperature is lower than 1,140 ° C., complete sintering of the stainless steel does not occur, and if the sintering temperature is higher than 1,200 ° C., the powder particles grow excessively, and the porosity decreases. The result is a significant reduction.

On the other hand, if the sintering time is shorter than the above range, the strength of the sintered body is reduced, the porosity becomes extremely high, and the luster effect peculiar to metal cannot be obtained. On the other hand, if the sintering time is longer than the above time range, the porosity is remarkably reduced and the absorbability is reduced.

After producing a highly absorbent porous sintered alloy,
To enhance corrosion resistance, immersion in a 3-5% aqueous solution of benzotriazole, which is a metal corrosion inhibitor, removes water remaining on the inner wall of all pores and coats it with an organic protective film of about 50 mm thick. After performing a sealing treatment for preventing rust, a step of impregnating the inside of the pores of the sintered body with various liquid fragrances, deodorants, or fragrance treatment agents is performed.

FIG. 2 is a comparison of microscopic photographs of the microstructures of the conventional porous sintered alloy and the superabsorbent porous sintered alloy according to the present invention. In FIG. 2 (b) of the pores of the highly absorbent porous sintered alloy body according to the present invention, the impregnation amount is larger than in FIG. 2 (a) of the impregnated pores (black portions). You can see well.

As a method for impregnating the pores of the sintered alloy with such a liquid fragrance, there are a method of injecting under a vacuum and a method of injecting by natural capillary phenomenon under normal pressure. In the case of the highly corrosion-resistant and highly-absorbent porous sintered alloy body according to the present invention, both of the above two methods can be applied. Has the advantage that it is easy to refill yourself.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS SUS316L powder is used as a material for producing a highly corrosion-resistant and highly absorbent porous sintered alloy according to the present invention. The composition of the SUS316L powder is C:
0.03 or less, Si: 0.1 or less, Mn: 2.0 or less,
P: 0.045 or less, S: 0.03 or less, Ni: 12-
15, Cr: 16 to 18 and Mo: 2 to 3 are typical compositions. At this time, the average particle size of the powder is 100 to 150 μm.
m is used so that the porosity of the superabsorbent porous sintered alloy according to the present invention is 18 to 25%.

In order to form a high-strength stainless steel powder, a binder is always added. At this time, the binder to be added uses Accra wax. In addition, when the powder is molded with the binder, it must be sufficiently homogenized by a mixer before molding so as not to be biased to any part of the molded body.

Subsequently, the mixed powder is cooled at room temperature to 390-390 ° C.
After the compact is manufactured by biaxial pressing at a pressure of 490 Mpa, the first preliminary sintering for removing the binder is performed. The presintering is performed at a temperature in the range of 780-850 ° C. for 90-100 ° C. so that the binder is removed by complete combustion.
Heat for a minute.

The primary pre-sintered compact is then used to prevent the oxidation of the sintered alloy and to produce a high-quality sintered body having high corrosion resistance, so that a mixed gas of nitrogen and methane gas or nitrogen and hydrogen gas is used. Pusher type (PusherTy) in a reducing atmosphere such as a mixed gas of ammonia, an ammonia decomposition gas or a vacuum atmosphere at a temperature of 1,140 to 1,200 ° C for 90 to 100 minutes.
The secondary sintering is performed in the sintering furnace of pe).

In order to further improve the corrosion resistance of the superabsorbent porous sintered alloy produced by such a process, benzotriazole (Bentrisol) which is a metal corrosion inhibitor is used.
After immersing in a 3 to 5% aqueous solution of z-otriazole: C ₆ H ₅ N ₃ ) and performing a sealing treatment to coat the organic protective film while removing moisture remaining in the pores, the inside of the pores of the sintered body is removed. The entire process is completed with the impregnation of various liquid fragrances.

As a method of impregnating the inside of the pores of the sintered body with the liquid fragrance, there are a method of injecting under a vacuum and a method of injecting by natural capillary action under normal pressure. In the embodiment of the present invention, a method of injecting a liquid fragrance by a method of injecting by a natural capillary phenomenon to allow a consumer to easily refill when a liquid fragrance is lost in a product is described. I do.

The following Table 1 shows the relationship between a highly corrosion-resistant and high-absorbent porous sintered alloy produced using the SUS316L powder according to the present invention and sealed, and a conventional porous sintered alloy. And the absorption rate by natural capillary action under normal pressure was compared.

As shown in Table 1, the highly corrosion-resistant and highly-absorbent porous sintered alloy according to the present invention has a remarkable maximum absorption rate of 0.08 g / min of the liquid fragrance as compared with the conventional sintered alloy. The porosity of the highly corrosion-resistant and highly-absorbent porous sintered alloy body manufactured according to the present invention is 18-25%, which is higher than that of the conventional sintered alloy. The porosity is higher than the porosity of 5 to 15% possessed by the body, and the moisture remaining in the pores is removed by the sealing treatment, and the porosity becomes relatively high. As a result, the rate of absorption for liquid fragrances has also been increased.

[0024] Such an increase in the perfume injection rate means that when the perfume injected into the sintered alloy body is consumed and lost, the refill can be easily performed. Since the porosity of the superabsorbent porous sintered alloy according to the present invention is remarkably high, the fragrance period is prolonged with an increase in the amount of the fragrance to be impregnated.

Table 2 shows the corrosion resistance of the porous sintered alloy manufactured using the conventional SUS304L powder and the sealing of the highly absorbent porous sintered alloy manufactured using the SUS316L powder according to the present invention. The corrosion resistance before and after the treatment was compared. At this time, the corrosion experiment was performed by immersing the porous sintered alloy body in a 5% solution of salt water and observing the state of surface corrosion over time to evaluate.

As shown in Table 2 below, the conventional SUS3
In the case of the porous sintered body manufactured using the 04L powder as the raw material, it was demonstrated that the corrosion resistance was significantly lower than that of the porous sintered alloy manufactured using the SUS316L powder according to the present invention as the raw material.

This is a result of molybdenum (Mo) contained in SUS316L, which is not contained in SUS304L, but is improved in corrosion resistance.
As a result of performing the above-described sealing treatment on the highly absorbent porous sintered alloy manufactured using the SUS316L powder as a raw material and performing a corrosion test, it was found that the corrosion resistance was improved more than before the sealing treatment. Is shown. In other words, the pore-sealing treatment involves immersing in an aqueous solution of benzotriazole, which is a metal corrosion inhibitor, to remove moisture remaining inside the pores and coat the metal surface and the pore inner walls with an organic protective film. It was clearly demonstrated that the corrosion resistance of the bonded metal body was further improved.

Accordingly, the sintered body having high corrosion resistance and high absorptivity according to the present invention has a SUS having an average particle size of 100 to 150 μm so that the porosity ranges from 18% to 25%.
316L powder is mixed with a binder and mixed at room temperature with 390-4
After molding at a pressure of 90 MPa, pre-sintering is performed at a temperature in the range of 780 to 850 ° C. for 90 to 100 minutes, and after removing the binder, 1,140 in a reducing atmosphere or under vacuum.
A porous sintered alloy produced by sintering at a temperature in the range of 1,200 ° C. for 90 to 100 minutes is immersed in a 3 to 5% solution of benzotriazole, a metal corrosion inhibitor, to remove residual moisture in the pores. It is obtained by removing and subjecting the pore inner wall surface to a sealing treatment for coating an organic protective film, and then impregnating with various liquid fragrances.

[0029]

According to the present invention, the highly corrosion-resistant and highly-absorbent porous sintered alloy body according to the present invention has a variety of designs and visual splendor of metal accessories, and further provides an olfactory effect to maximize product satisfaction. Can be realized. In addition, it not only satisfies the various needs of consumers, but also improves the corrosion resistance, increases the durability, prolongs the fragrance period, and increases the injected liquid fragrance compared to the conventional porous sintered alloy body. When it runs out, there is an effect that consumers can easily refill.

[0030]

[Table 1]

[0031]

[Table 2]

[0032]

[Brief description of the drawings]

FIG. 1 is a process diagram for manufacturing a highly corrosion-resistant and highly absorbent porous sintered alloy according to the present invention.

FIG. 2 is a micrograph comparing the microstructures of a conventional porous sintered alloy body (a) and a porous corrosion-resistant and highly absorbent porous sintered alloy body (b) according to the present invention.

Claims (5)

[Claims] 1. SUS316L (stainless steel)
A highly sintered and highly absorbent porous sintered alloy, which is formed by sintering powder and has a porosity of 18 to 25%. 2. The method according to claim 1, wherein the injection rate at the time of impregnating a liquid fragrance, a deodorant, a fragrance treatment agent, or the like by natural capillarity into pores of the porous sintered alloy body by immersion or the like, A highly corrosion-resistant and highly-absorbent porous sintered alloy body characterized in that it is configured to have a maximum of 0.08 g / min in a thickness of 2 mm × area of 490 mm ² of the alloy body. 3. The method according to claim 1, wherein when the liquid fragrance, the deodorant, or the fragrance treatment agent injected into the pores of the porous sintered alloy is depleted, a refill (Ref) for replenishing them.
a highly corrosion-resistant and highly-absorbent porous sintered alloy, wherein ill) is easily formed by drip or immersion. 4. An average particle size ranging from a minimum of 100 μm to a maximum of 15
Mixing SUS316L powder having a size of 0 μm or less with a binder, and mixing the mixed powder at room temperature with 390-490.
Molding under a pressure in the range of MPa,
Performing pre-sintering for binder removal at a temperature in the range of ８850 ° C. for 90 to 100 minutes, and further sintering at a temperature in the range of 1,140 to 1,200 ° C. for 90 to 100 minutes after the binder removal. A method for producing a highly corrosion-resistant and highly-absorbent porous sintered alloy body, comprising performing steps and the like. 5. A benzotriazole (C ₆ H ₅ N) as a metal corrosion inhibitor for improving the corrosion resistance of the porous metal sintered body according to claim 4.
₃ ) By immersing in a _{3 to} 5% aqueous solution, water remaining in the pores is removed, and thereafter, an organic protective film of about 50 ° is formed and coated on the inner wall surfaces of all the pores, so-called sealing treatment is additionally performed. And a liquid perfume, a deodorant or a perfume treatment agent, and a method for producing a product comprising a highly corrosion-resistant and highly absorbent porous sintered alloy. [0001]