KR101358862B1 - Dlc(diamond-like carbon) coating blade and knife and method thereof - Google Patents

Abstract

The present invention relates to a die-coated blade and a knife and a method for manufacturing the same, comprising: a base material formed of a stainless material and tempering after a three-step heat treatment at an increasingly low temperature; An interlayer formed by spraying pure chromium nanoparticles on the base material; A buffer layer formed on the interlayer by a plasma reaction of acetylene and nitrogen; And DLC (Diamond-Like Carbon) coating layer formed by spraying carbon nanoparticles on the buffer layer and formed to a thickness of 1.2 to 1.5 microns. The present invention has high wear resistance and can be used permanently, and is not hygienic because foreign matters do not stick to each other.

Description

DLC coated blade and knife and manufacturing method thereof {DIAMOND-LIKE CARBON) COATING BLADE AND KNIFE AND METHOD THEREOF}

TECHNICAL FIELD The present invention relates to a blade and a knife and a method for manufacturing the same, and more particularly, to a blade and a knife on which a DLC coating is formed and a method for manufacturing the same.

In general, knives, such as kitchen knives, are essential tools used to cut or trim food ingredients such as meat, fish, vegetables, and fruits in the kitchen.

Kitchen knives are produced in various forms depending on the type of food material to be cut, cutting method, and the like. However, kitchen knives most commonly used in homes or restaurants have a common form to implement a cutting or trimming function, and only detailed designs are modified and manufactured.

The blades of kitchen knives are usually made of stainless or iron. Such a conventional blade has a problem that the blade is worn down and wear resistance is poor if used only a little, there is also a problem that rust or corrosion occurs.

And there is a hassle to change the blade frequently. Here, the cutting of the blade also requires a high level of skill, but in general households roughly used to change, there is a problem that you need to sharpen the blade frequently.

And the side surface of the blade is magnified or bent when the bone is enlarged, oil or fat, foreign matters attached to this part, bacteria are multiplied, and there is also an unsanitary problem.

In addition, the tip of the blade is a sawtooth, so that when cutting the food ingredients when cutting, the nutrients of the food ingredients are destroyed, the food clings to the blade, there is a problem that the iron smell on the food.

In addition, the cutting board is damaged because of the sawtooth-shaped blade, there is also an unsanitary problem because the foreign matter is caught in the damaged portion.

The present invention has been proposed to solve the above problems, and its object is to provide a die-coated blade and a knife and a method for manufacturing the same can be used permanently improved wear resistance.

Another object of the present invention is to provide a DLC coated blade and a knife and a method for producing the same, which are hygienic, prevent rust and corrosion and do not stick to food.

It is still another object of the present invention to provide a DLC coated blade and a knife and a method for producing the same, which are capable of maximally preserving the nutrients of the food ingredients, do not smell iron, and do not damage the cutting board.

The die-coated blade according to the present invention for achieving the above object is a stainless steel (stainless) material, the base material is formed by tempering (tempering) after the three-stage heat treatment of an increasingly low temperature; An interlayer formed by spraying pure chromium nanoparticles on the base material; A buffer layer formed on the interlayer by plasma reaction of acetylene and nitrogen under discharge; And DLC (Diamond-Like Carbon) coating layer formed by spraying carbon nanoparticles on the buffer layer, and formed to a thickness of 1.2 to 1.5 microns.

And the heat treatment temperature of the base material of the die-coated blade according to the present invention is the first 1100 ℃, the second 1050 ℃, the third 1030 ℃, tempering is carried out for 6-8 hours at 200 ℃, the interlayer, buffer layer , And the DLC coating layer is formed at a temperature of less than 150 ℃, the buffer layer is formed by the plasma reaction of acetylene and nitrogen under discharge, the DLC coating layer is formed of amorphous film quality of the mixture of SP2 and SP3 bond of carbon nanoparticles It is characterized by being.

On the other hand, the DL coating knife according to the present invention for achieving the above object, the above-mentioned DL coating blade; It is coupled to the die-coated blade rear end, the handle is formed of any one material of silicon, synthetic resin, wood, stainless steel; includes.

On the other hand, the manufacturing method of the die-coated blade according to the present invention for achieving the above object, the process of alkali ultrasonic cleaning the base material of the stainless steel material is subjected to the three-step heat treatment and tempering; Forming an interlayer by spraying pure chromium nanoparticles on the base material at a temperature of 150 ° C. or lower; Forming a buffer layer on the interlayer by plasma reaction of acetylene and nitrogen under discharge at a temperature of 150 ° C. or lower; And spraying carbon nanoparticles on the buffer layer at a temperature of 150 ° C. or less for 100 to 150 minutes to form a DLC coating layer having an amorphous film quality of 1.2 to 1.5 microns in which SP2 and SP3 bonds of carbon nanoparticles are mixed. Forming process; includes.

The present invention has a surface hardness of 2000-3000 Vickers hardness, very high wear resistance, can be used for a long time without grinding the blade, there is an effect that can be used permanently.

In addition, the friction coefficient of the blade surface is very slippery with 0.04 ~ 0.2 because of the close bonding of the carbon nanoparticles with the diamond and the closest property. Therefore, foreign matter hardly adheres to the surface of the blade, and bacteria have an effect that is difficult to propagate. Even if food or bacteria are on the surface of the blade, they are easily removed by washing with detergents, so they are hygienic and have a non-stick effect.

In addition, the general blade has a tip like a saw blade when the food material is torn when cutting, but the blade according to the present invention is a tip of the wave form so that when cutting, there is almost no nutrient loss of the food material, coating Due to the iron smell does not smell, prevents rust and corrosion, and has the effect of enhancing the taste of food.

And since the end of the blade is a wave form, there is no effect of cutting the chopping board. For this reason, a cutting board can be used for a long time and there exists an effect which can be used hygienically.

In addition, due to the DLC coating it is possible to prevent the reaction of the corrosive gas and various chemicals and acids, thereby improving the corrosion resistance.

And by gradually lowering the heat treatment temperature of the base material in three steps to solve the problem that the blade is easily broken, the tempering (tempering) through the process of the blade is not easily broken, the surface hardness is high, the wear resistance is improved.

In addition, by the interlayer formed of pure chromium nanoparticles, the DLC coating layer is well formed on the base material, thereby preventing the occurrence of rust.

In addition, the buffer layer prevents excessive stress concentration at the blade portion, thereby dispersing stress.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

1 is a view showing a DLC coating knife according to the present invention.
FIG. 2 is an enlarged view of A of FIG. 1 and illustrates an enlarged view of a DLC coated blade according to the present invention. FIG.
Figure 3 is a view of the DLC coated blade according to the present invention in SEM.
4A-4C are SEM micrographs of DLC coated blades according to another technique.
5 is a view comparing the wear and friction coefficient according to the DLC coating and another coating method according to the present invention.
Figure 6 is a flow chart illustrating a method of manufacturing a DLC coated blade according to the present invention.
Figure 7 is a graph showing the hardness change of the blade over time when a temperature of 200 ℃ or more during the post-treatment process.

Hereinafter, a DLC coated blade and a knife according to a preferred embodiment of the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings. 1 is a view showing a DLC coating knife according to the present invention, Figure 2 is an enlarged view of the A of Figure 1, an enlarged view showing a DLC coating blade according to the present invention.

Referring to FIGS. 1 and 2, the DLC coated blade 100 according to the present invention includes a base material 10, an interlayer 20, a buffer layer 30, and a diamond-like carbon (DLC). The coating layer 40 is included.

The base material 10 is a stainless material used for a general blade. The base material 10 is prepared through a heat treatment process, a tempering process, and a washing process. The heat treatment process is a three-step heat treatment at a gradually lower temperature, the first 1100 ℃, the second 1050 ℃, the third 1030 ℃ to gradually lower the temperature. At this time, the reason for performing the heat treatment step by step at a gradually lower temperature is because the hardness of the blade is too high and easily broken when the heat treatment at a high temperature continuously.

The tempering process is carried out at 200 ° C. for 6-8 hours. The blade made of the base material 10 subjected to the tempering process is not easily broken, the surface hardness is high, there is an effect that the wear is not easy. The base material 10 subjected to the heat treatment process and the tempering process is prepared for the DLC coating blade 100 according to the present embodiment by performing alkaline ultrasonic cleaning.

The interlayer 20 is formed on the base material 10. The interlayer 20 is formed by spraying pure chromium (Cr) nanoparticles at a temperature of 150 ° C. or less. The interlayer 20 is a layer formed to enable the DLC coating to be well formed on the base material 10, and facilitates bonding of carbon nanoparticles of the base material 10 made of stainless steel to the DLC coating layer 40 described below. . FIG. 3 shows a blade 100 according to the present embodiment, in which an DLC coating layer 40 is formed on an interlayer 20 formed of pure chromium nanoparticles, using a scanning electron microscope (SEM). 4A to 4C show a blade having a DLC coating layer formed on another material (CrN, Ti, TiCN). Figure 3 is a view of the DLC coated blade according to the invention in SEM, Figures 4a to 4c is a view of the DLC coated blade according to another technique in a SEM microscope.

As shown in Figure 3, the chromium and DLC coating layer is a smooth bond is well made, the surface is smooth, it can be seen that the end is formed in a wave form. On the other hand, as shown in Figures 4a to 4c, chromium nitride (CrN), titanium (Ti; titanium), titanium carbide nitride (TiCN; titanium carbonitride) and DLC coating layer is not well bonded and foreign matter is formed It will be seen that the surface is rough and the tip is curved like a saw blade. As such, since the interlayer 20 according to the present embodiment is formed of pure chromium nanoparticles, the coupling between the base material 10 and the DLC coating layer 40 described below may be facilitated.

The buffer layer 30 is formed on the interlayer 20. The buffer layer 30 is formed by a plasma reaction of acetylene and nitrogen under discharge at a temperature of 150 ° C. or less. The buffer layer 30 is inserted between the interlayer 20 and the DLC coating layer 40 described below in order to prevent a phenomenon in which excessive stress is concentrated at the end of the DLC coating blade 100 according to the present embodiment. Due to the buffer layer 30, a stress dispersion effect can be imparted.

The DLC coating layer 40 is formed on the buffer layer 30. DLC coating layer 40 is sprayed with carbon nanoparticles for 100 to 150 minutes at a temperature of 150 ℃ or less, it is formed of an amorphous film quality of the mixture of SP2 and SP3 bonds of the carbon nanoparticles. DLC coating, as is well known, is a kind of carbon compound, graphite made of the same carbon consists of only SP2 bonds, diamond made of the same carbon consists of only SP3 bonds, while DLC is a mixture of SP2 and SP3. The physicochemical properties of these DLC and other materials including diamond and graphite are shown in Table 1.

Diamond DLC Etc Crystal structure Cubic (SP3) Amorphous
SP3, SP2 blend Graphite Hexagonal
(SP2) Density (g / cm ³ ) 3.51 1.8-2.0 Graphite 2.26
Polymer 1.2 Hardness
(Vickers, kg / mm ² ) 7000-10000 900-3000 SiC 2850
Al ₂ O ₃ 2040
c-BN 4500 Coefficient of friction 0.03-0.07 0.005-0.05 Teflon 0.1
AlOx 0.12
SiNx 0.16 Refractive index 2.42 1.8-2.2 Ge 4.0
Glass 1.5 Transparency UV-VIS-IR VIS-IR Graphite opacity Optical Gap (eV) 5.5 2.0-3.0 SiC 3.0
Si 1.11 Resistivity (Ωm) > 10 ¹⁶ 10 ¹⁰ -10 ¹³ Graphite 0.4 (parallel to c axis)
0.2 (perpendicular to c axis) Dielectric constant 5.7 4-9 SiC 9.7
Si 11.8

As shown in Table 1, DLC has characteristics such as low coefficient of friction due to the softness of graphite, strength of diamond, wear resistance, chemical stability, and the like.

A table comparing the wear and friction coefficients of DLC and other materials (WC, TiN, CrN, TiCN) is shown in FIG. 5. 5 is a view comparing the wear and friction coefficient according to the DLC coating and another coating method according to the present invention. As shown in Figure 5, it can be seen that DLC is significantly lower wear and friction coefficient than other materials.

DLC coating layer 40 is formed to a thickness of 1.2 ~ 1.5 microns. The reason why the DLC coating layer 40 is formed at such a thickness is that the thinner the wear resistance, the thicker the cutting force.

On the other hand, the manufacturing method of the DLC coated blade 100 according to the present embodiment described above will be described. Figure 6 is a flow chart illustrating a method of manufacturing a DLC coated blade according to the present invention.

1 to 6, the manufacturing method of the DLC coated blade 100, first, to wash the base material 10 of stainless steel (S1). The base material 10 of the DLC coated blade 100 according to the present embodiment proceeds to the cleaning process by alkaline ultrasonic cleaning. Here, the cleaning method of the base material 10 is not limited to alkaline ultrasonic cleaning, and various various cleaning methods may be applied.

Next, pure chromium nanoparticles are sprayed on the base material 10 at a temperature of 150 ° C. or lower to form an interlayer 20 (S3). The interlayer 20 may facilitate coupling of the base material 10 and the DLC coating layer 40 described below.

Subsequently, the buffer layer 30 is formed on the interlayer 20 by a plasma reaction of acetylene and nitrogen under discharge at a temperature of 150 ° C. or less (S5). The buffer layer 30 has an effect of dispersing the stress of the end portion of the DLC coated blade 100 according to the present embodiment.

Next, carbon nanoparticles are sprayed on the buffer layer 30 at a temperature of 150 ° C. or less for 100 to 150 minutes to form an amorphous film having a thickness of 1.2 to 1.5 microns in which SP2 and SP3 bonds of carbon nanoparticles are mixed. DLC coating layer 40 is formed (S7). DLC coating layer 40 has the effect of improving the wear resistance, hygienic use of the DLC coating blade 100 according to the present embodiment.
In the above processes, the temperature of the interlayer 20, the buffer layer 30, and the DLC coating layer 40, that is, the post-treatment processes, is 150 ° C. or less. The reason is that when a high temperature, for example, 200 ° C. or more is applied to the base material 10 prepared by the heat treatment and tempering process, the hardness of the blade 100 is lowered and wear resistance is lowered, whereby the blade 100 is easily worn. Since a phenomenon occurs and the function of the blade 100 is remarkably deteriorated, it is advanced at a temperature below that, that is, a temperature below 150 ° C.
When a temperature of 200 ° C. or more is applied in the post-treatment process, the hardness of the blade 100 over time is shown in Table 2 below.
time Foreground view Back hardness 10 minutes 57 57 10 minutes 57 57.5 20 minutes 57.5 58 20 minutes 57 57 30 minutes 57.5 57 30 minutes 57.5 57 1 hours 57 56.5 1 hours 57 56.5 4 hours 57 54 4 hours 57 53.5
As shown in Table 2, compared to the foreground of the hardness of the blade 100 before applying a temperature of 200 ° C or more, if the time is gradually added by applying a temperature of 200 ° C or more, the hardness of the hardness of the blade 100 is significantly reduced. Able to know. A graph showing a state in which the hardness of the blade 100 is changed by applying a temperature of 200 ° C. or higher in the post-treatment shown in this table is shown in FIG. 7. That is, when a temperature of 200 ° C. or more is applied in the post-treatment, the hardness is maintained for the first few minutes, but the hardness decreases significantly after about 20 minutes. For this reason, the phenomenon that the blade 100 is easily worn occurs, thereby significantly reducing the function of the blade 100, so that the post-treatment proceeds at a temperature of 200 ° C or less.

On the other hand, it will be described with respect to the knife 300 using the DLC coated blade 100 according to the present embodiment described above. Referring to FIG. 1, the DLC coated knife 300 according to the present exemplary embodiment includes a DLC coated blade 100 and a handle 200. DLC-coated blade 100 is the same as described above.

The handle 200 is a handle of a general knife, and is coupled to the rear end of the DLC coated blade 100. The handle 200 may be integrally coupled to the DLC coated blade 100 or may be combined in various forms such as a detachable type and a connected type. The handle 200 may be formed of any material such as silicon, synthetic resin, wood, stainless steel. In this embodiment, the DLC coating knife 300 of the form shown in FIG. 1 is described as an example, but is not limited thereto.

Meanwhile, the DLC coated blade and the knife and the manufacturing method thereof according to the present embodiment are not limited to the above-described form and may be variously modified within the scope not departing from the technical spirit of the present invention. It will be readily apparent to those skilled in the art to which the present invention pertains.

100; DLC coated blade
200; handle
300; DLC coating knife
10; Base material
20; Interlayer
30; Buffer layer
40; DLC coating layer

Claims (4)

A base material formed of a stainless material and tempering after a three step heat treatment performed step by step at a gradually lower temperature at a high temperature in a range of 1100 ° C. to 1030 ° C .;
An interlayer formed by spraying pure chromium nanoparticles on the base material;
A buffer layer formed on the interlayer by plasma reaction of acetylene and nitrogen under discharge; And
The die-coated blade comprising a; formed by injecting carbon nanoparticles on the buffer layer, DLC (Diamond-Like Carbon) coating layer formed to a thickness of 1.2 ~ 1.5 microns. The method of claim 1,
The heat treatment temperature of the base material is the first 1100 ℃, the second 1050 ℃, the third 1030 ℃, tempering is carried out for 6-8 hours at 200 ℃,
The interlayer, the buffer layer and the DLC coating layer is formed at a temperature of 150 ℃ or less, the DLC coating layer is a die coating blade, characterized in that the amorphous film quality of the mixture of SP2 and SP3 bonds of carbon nanoparticles are formed. A die-coated blade of claim 1 or 2;
And a handle coupled to the rear end of the die-coated blade, the handle being made of any one material of silicon, synthetic resin, wood, and stainless steel. Alkali ultrasonic cleaning of the base material of stainless steel subjected to the three-step heat treatment and tempering;
Forming an interlayer by spraying pure chromium nanoparticles on the base material at a temperature of 150 ° C. or lower;
Forming a buffer layer on the interlayer by plasma reaction of acetylene and nitrogen under discharge at a temperature of 150 ° C. or lower; And
By spraying carbon nanoparticles for 100 to 150 minutes at a temperature of 150 ℃ or less on the buffer layer, to form a DLC coating layer in which the amorphous film quality of the mixture of SP2 and SP3 bonds of carbon nanoparticles is formed to a thickness of 1.2 ~ 1.5 microns DLC coating blade manufacturing method comprising a.

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