KR20200053368A - Color implementing method of metal surface and surface color implemented metal panel - Google Patents

Abstract

The present invention is to provide a metal surface color implementing method and a metal plate with a surface color implemented thereon, which can implement various colors on a metal surface by controlling the amount of dry process time for depositing a thin film in performing a dry thin film deposition process on a laser induced periodic surface structure (LIPSS) surface. According to an embodiment of the present invention for achieving the above-described problem of the present invention, the method comprises the steps of: forming an LIPSS on the surface of a metal member by using a laser beam; setting a metal dry deposition process time for implementing a desired color group; and performing a dry deposition process under the set metal dry deposition process time condition, and depositing color group implementation metal on an upper surface of the LIPSS of the metal member to implement the color of the desired color group.

Description

Color implementing method of metal surface and surface color implemented metal panel}

The present invention relates to implementing a surface color on a metal, and more particularly, in performing a dry thin film deposition process on a LIPSS surface, various colors can be implemented on a metal surface by controlling the dry process time to deposit a thin film. It relates to a method for implementing a metal surface color and a metal plate on which the surface color is implemented.

Recently, there has been a very high demand for consumers to meet the aesthetics of the surface of steel sheets used as interior and exterior materials for construction, home appliances and exterior materials for automobiles. Accordingly, metal plates having various colors are supplied to satisfy consumer preferences.

As a method of implementing the above-mentioned metal surface color in the prior art, the coating technique or coating technique disclosed in Korean Patent Registration No. 10-0171679 has been widely used.

However, since the coating technology or coating technology, which is a method of implementing the surface color of the metal of the prior art, uses a volatile organic compound or an electrolytic solution for plating, a large amount of environmentally harmful substances such as volatile substances, metals for plating, or chemicals are generated. There was a problem.

Also, whenever the color of the metal is implemented. Since a paint or coating material is used in combination, the reproducibility of color implementation is poor, and after producing a metal plate material in which color is implemented using the same coating or coating material for a certain period of time, the same color is again applied to the surface of the metal plate material. It has a problem that it is impossible to implement.

In addition, when implementing color on a metal surface by painting or coating as in the above-mentioned prior arts, the reproducibility is lowered, and a problem that mass production is not easy also occurs.

Republic of Korea Registered Patent No. 10-0171679

Therefore, an embodiment of the present invention for solving the above-described problems of the prior art, a laser induced periodic surface structure (LIPSS) is formed on a metal using a femtosecond laser having a relatively short process time and easy process control, and dry deposition Provides metal surface color realization method and metal plate material with surface color that enables various colors to be realized on the metal surface without causing environmental pollution by depositing metal on the LIPSS surface by performing a dry deposition process by varying the process time It aims to do.

In addition, another object of the present invention is to provide a metal surface color implementing method and a metal plate material on which the surface color is implemented, which can increase the color reproduction reproducibility of a metal surface and enable mass production.

In addition, an object of the present invention is to provide a metal surface color implementing method and a metal plate material having a surface color to enable natural colors and textures to meet user preferences or needs by controlling process conditions.

One embodiment of the present invention for achieving the above object of the present invention, using a laser to form a laser-induced periodic surface structure (LIPSS) on the surface of the metal member; Setting a metal dry deposition process time for implementing a desired color group; And a desired color group implementation step of performing a color deposition process on the upper surface of the laser-induced periodic surface structure of the metal member by performing a dry deposition process under the set metal dry deposition process time condition. It provides a method for implementing the surface color of the metal, characterized in that it comprises a.

The laser is characterized by being a femtosecond laser.

The step of forming the laser-induced periodic surface structure is characterized by forming the laser-induced periodic surface structure to have a pattern for expressing a predetermined color.

The metal constituting the metal member is characterized in that it is either a non-ferrous metal or an iron-based metal.

The non-ferrous metal may be one or more selected from the group consisting of Cu, Zn, Au, Ag, Al, Ti, W, Ni, Mo, Co, Mg or alloys thereof.

The iron-based metal may be one or more selected from the group containing Fe or Fe alloy.

The color group-implemented metal deposited by the dry deposition process may be at least one selected from the group comprising a metal or an alloy of metals having a melting point of 1500 ° C or higher.

The color group-implemented metal deposited by the dry deposition process may be at least one selected from the group containing Ni, Ti, Zr or alloys thereof.

The metal surface color implementation method according to one embodiment of the present invention described above, after the step of implementing the color of the desired color group, is specified for the expression of a specific color among colors included in the desired color group expressed according to the viewing angle The method may further include a step of imparting a surface refractive index to form a transparent polymer layer having a refractive index corresponding to a viewing angle on top of the color group-implemented metal layer.

Another embodiment of the present invention for achieving the above object of the present invention, a metal member; A laser induced periodic surface structure (LIPSS) formed on the metal member; And a color group implementing metal layer formed by dry deposition during a dry deposition process time corresponding to the implementation of a desired color group.

The laser is characterized by being a femtosecond laser.

The step of forming the laser-induced periodic surface structure is characterized by forming the laser-induced periodic surface structure to have a pattern for expressing a predetermined color.

The metal constituting the metal member is characterized in that it is either a non-ferrous metal or an iron-based metal.

The non-ferrous metal may be one or more selected from the group consisting of Cu, Zn, Au, Ag, Al, Ti, W, Ni, Mo, Co, Mg or alloys thereof.

The iron-based metal may be one or more selected from the group containing Fe or Fe alloy.

The color group-implemented metal deposited by the dry deposition process may be at least one selected from the group comprising a metal or an alloy of metals having a melting point of 1500 ° C or higher.

The color group-implemented metal deposited by the dry deposition process may be at least one selected from the group containing Ni, Ti, Zr or alloys thereof.

The metal plate material, characterized in that further comprises a; a transparent polymer layer having a refractive index adjusted for the expression of a specific color among the colors included in the desired color group expressed according to the viewing angle on the top of the color group embodying metal layer do.

According to the embodiments of the present invention, since the process is performed in a dry manner, it provides an effect to implement natural colors and textures on a metal surface in accordance with a user's preference according to process condition control.

In addition, according to embodiments of the present invention, by forming a color on a metal surface by using LIPSS formation and dry deposition by femtosecond laser processing, which has a relatively short process time and easy process control, the same color is realized on the metal surface. The reproducibility is significantly improved, and the process efficiency is remarkably improved because the dry thin film deposition process, which is easy to mass-produce, is significantly improved, which enables mass production of metal plates with high color reproducibility of color realization on the surface.

In addition, embodiments of the present invention, a relatively short process time and easy to control the process using a femtosecond laser to form a LIPSS (Laser Induced Periodic Surface Structure) on the metal, and perform a dry deposition process by varying the dry deposition process time This provides an effect that enables various colors to be implemented on a metal surface without causing environmental pollution.

1 is a view showing a process of a method for implementing a metal surface color according to an embodiment of the present invention.
2 is a view showing a metal surface color implementation process of an embodiment of the present invention.
Figure 3 is a block diagram of the metal plate is implemented in the surface color of another embodiment of the present invention.
4 is a metal surface having a laser-induced periodic surface structure (LIPSS) processed by a femtosecond laser according to an experimental example and a dry thin film deposition process. Photo taken at 0 °.
Figure 5 is a graph showing the change in brightness of each metal surface treatment method of the experimental example.
Figure 6 is a graph showing the color implementation performance of each metal surface treatment method of the experimental example.
7 is a metal group having a laser-induced periodic surface structure (LIPSS) and a color group-implemented metal layer (Ti layer) having different thicknesses according to the dry deposition process time on the upper surface of the laser-induced periodic surface structure (LIPSS). A diagram showing a color group having a color for each viewing angle of a metal surface when deposited.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and thus is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is "connected (connected, contacted, coupled)" with another part, it is not only "directly connected" but also "indirectly connected" with another member in between. "It also includes the case where it is. Also, when a part “includes” a certain component, this means that other components may be further provided instead of excluding other components, unless otherwise stated.

The terms used herein are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

One embodiment of the present invention, using a laser to form a laser-induced periodic surface structure (LIPSS) on the surface of the metal member; Setting a metal dry deposition process time for implementing a desired color group; And a desired color group implementation step of performing a color deposition process on the upper surface of the laser-induced periodic surface structure of the metal member by performing a dry deposition process under the set metal dry deposition process time condition. It provides a method for implementing the surface color of the metal, characterized in that it comprises a.

Another embodiment of the present invention, a metal member; A laser induced periodic surface structure (LIPSS) formed on the metal member; And a color group implementing metal layer formed by dry deposition during a dry deposition process time corresponding to the implementation of a desired color group.

The laser is characterized by being a femtosecond laser.

The step of forming the laser-induced periodic surface structure is characterized by forming the laser-induced periodic surface structure to have a pattern for expressing a predetermined color.

The metal constituting the metal member is characterized in that it is either a non-ferrous metal or an iron-based metal.

The non-ferrous metal may be one or more selected from the group consisting of Cu, Zn, Au, Ag, Al, Ti, W, Ni, Mo, Co, Mg or alloys thereof.

The iron-based metal may be one or more selected from the group containing Fe or Fe alloy.

The color group-implemented metal deposited by the dry deposition process may be at least one selected from the group comprising a metal or an alloy of metals having a melting point of 1500 ° C or higher.

The color group-implemented metal deposited by the dry deposition process may be at least one selected from the group containing Ni, Ti, Zr or alloys thereof.

The metal surface color implementation method according to one embodiment of the present invention described above, after the step of implementing the color of the desired color group, is specified for the expression of a specific color among colors included in the desired color group expressed according to the viewing angle The method may further include a step of imparting a surface refractive index to form a transparent polymer layer having a refractive index corresponding to a viewing angle on top of the color group-implemented metal layer.

The metal plate material of the embodiment of the present invention described above, a transparent polymer layer having a refractive index adjusted to express a specific color among colors included in the desired color group expressed according to a viewing angle on the top of the color group-implemented metal layer; Characterized in that it comprises more.

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

1 is a view showing a process of the metal surface color implementation method of an embodiment of the present invention, Figure 2 is a view showing a metal surface color implementation process of an embodiment of the present invention, Figure 3 is another embodiment of the present invention It is a block diagram of the metal plate with the surface color.

1 and 2, the metal surface color method of the embodiment of the present invention described above, LIPSS forming step (S10), metal dry deposition process time setting step (S20), desired color group implementation step (S30) and surface It comprises a refractive index imparting step (S40).

In addition, the metal plate 1 having the surface color of one embodiment of the present invention manufactured by the procedures and processes of FIGS. 1 and 2 is, as shown in FIG. 3, of the metal member 10 and the metal member 10 It comprises a laser induced periodic surface structure (LIPSS 11) formed on the top (LIPSS 11), a color group embodying metal layer 20 and a transparent polymer layer 30.

Specifically, in the LIPSS forming step (S10), LIPSS 11 having a pattern corresponding to a color group to be implemented using a femtosecond laser having 1kW to 3kW power is formed on the surface of the metal member 10. At this time, the metal member 10 is formed of either a non-ferrous metal or an iron-based metal. The non-ferrous metal may be one or more selected from the group consisting of Cu, Zn, Au, Ag, Al, Ti, W, Ni, Mo, Co, Mg or alloys thereof. And the iron-based metal may be one or more selected from the group containing Fe or Fe alloy.

Next, the dry deposition process time for forming the color group-implemented metal layer 20 corresponding to the color group to be implemented in the dry deposition process time setting step S20 is set.

The power of the femtosecond laser for forming the LIPSS, the scan irradiation speed, and the dry deposition process estimate can be selected and set in a process process for expressing a desired color after being constructed as a database for each color included in the color group.

Thereafter, in the color realization step (S30), a color group realizing metal layer 20 is formed on the surface of the LIPSS 11 by depositing the color group realizing metal 21 according to the set dry deposition process time condition. Implement color groups. The color group-implemented metal 21 may be one or more selected from the group comprising a metal or an alloy of metals having a melting point of 1500 ° C or higher. For example, the color group implementing metal 21 may be one or more selected from the group containing Ni, Ti, Zr or alloys thereof.

As described above, the surfaces of the metal member on which the LIPSS 10 and the color group-implemented metal layer 20 are formed express different colors included in the singer color group according to the viewing angle.

Accordingly, in the step of applying the surface refractive index (S40), a transparent polymer layer 30 having a refractive index corresponding to a specific viewing angle is displayed so that a specific color among color groups having differently expressed colors depending on the viewing angle is expressed regardless of the viewing angle ) Is formed on top of the color group embodying metal layer 20. Thereby, the color of the viewing angle direction corresponding to the refractive index of the transparent polymer layer 30 is expressed on the entire surface of the metal member 10 regardless of the viewing angle.

As described above, the present invention forms a LIPSS (11) having a pattern corresponding to a color group to be implemented on the surface of the metal member (10), the process time is small and the control is easy to control the color group by performing a dry deposition process By forming the embodying metal layer 20, it is possible to mass-produce the surface color group embodying metal plate 1 having high color reproducibility and high color reproducibility by enabling continuous realization of the color embodying process.

<Experimental Example>

-Manufacture of metal plate with surface color group

Pure Ni metal member (Pure Ni), Ni metal member (LIPSS-Ni) with LIPSS processed by a femtosecond laser with 1kW power on the surface, and pure Ni metal member (SP-Ni) with Ti layer deposited as a color group implementation metal , A Ni metal member (LIPSS-SP-Ni) having a Ti layer deposited on the surface of a LIPSS machined with a femtosecond laser of 1kW power was formed on the surface.

In the case of the Ni metal member (LIPSS-SP-Ni) on which the Ti layer was deposited on the surface where the LIPSS was formed, the Ti layer was formed to be 15 nm or less and the one formed to 15 nm.

- analysis

4 is a metal surface having a laser-induced periodic surface structure (LIPSS) processed by a femtosecond laser according to an experimental example and a dry thin film deposition process. It is a picture taken at 0 °, Figure 5 is a graph showing the change in brightness of each metal surface treatment method of the experimental example.

In FIG. 4, (a) is a pure Ni metal member (Pure Ni), (b) a Ti layer is formed with LIPSS of 15 nm or less, and a Ni layer is formed with a Ni metal member (LIPSS-SP-Ni) and (c) is Ti This is a photograph of the surface taken at a viewing angle of 0 ° of the LIPSS formed with a layer of 15 nm and a Ni metal member (LIPSS-SP-Ni) with a Ti layer deposited.

4 and 5, the surface brightness of the pure Ni metal member (Pure Ni) without Ti layer was the brightest, and the LIPSS with Ti layer of 15 nm and the Ni metal member with Ti layer deposited (LIPSS) -SP-Ni), the brightness decreases and darkens, but it can be seen that the contrast of the unit patterns of the LIPSS 11 is clearly displayed.

In addition, it can be seen from the photographs of FIG. 4 that the patterns forming the entire LIPSS 11 are not destroyed when the Ti is dry-deposited, and the Ti layer is coated. Through this, it was confirmed that various colors can be realized by varying the thickness of the metal layer implementing the color group while maintaining the structure.

6 is a graph showing the color realization performance for each method of surface treatment of the metal plate of the experimental example.

The color realization performance of FIG. 6 was measured using L *, a *, and b * in the CIE color coordinate system. For reference, in the CIE color coordinate system, L * represents a change in brightness, a * on the (+) side becomes red (R), and (-) on the green (G), and b * is (+ The yellow (Y) side becomes stronger on the) side, and the blue (B) side becomes stronger on the (-) side.

As can be seen in Figure 6, pure Ni metal member (Pure Ni), LIPSS formed on the surface of the Ni metal member (LIPSS-Ni), a pure Ni metal member formed of a Ti layer (SP-Ni), LIPSS on the surface It was found that different colors were implemented according to the Ni metal member (LIPSS-SP-Ni) on which the Ti layer was deposited.

Specifically, (a *, b *) of the pure Ni metal member (Pure Ni) was about (1.8, 10).

The Ni metal member (LIPSS-Ni) on which LIPSS was formed on the surface had (a *, b *) of about (8.7, 16).

The pure Ni metal member (SP-Ni) on which the Ti layer is deposited and the Ni metal member (LIPSS-SP-Ni) on which the Ti layer is deposited on the surface on which the LIPSS is formed have (a *, b *) of about (8.7 , 16).

(A *, b *) of the pure Ni metal member (SP-Ni) on which the Ti layer was deposited was about (-1.8, -3).

The Ni metal member (LIPSS-SP-Ni) on which the Ti layer was deposited on the surface where the LIPSS was formed was (a *, b *) of about (11, 20).

In other words, when LIPSS was not formed, color performance was low in both a pure metal member (Pure Ni) or a color group-implemented metal layer (SP-Ni). On the other hand, in the case of the metal member formed with LIPSS, it was found that the color realization performance was significantly improved in both the case where the color group-implemented metal layer was not formed (LIPSS-Ni) and the color group-implemented metal layer was formed (LIPSS-SP-Ni). Could. Particularly, it was found that in the case of the metal member (LIPSS-SP-Ni) in which the color group-implemented metal layer was formed on the surface of the LIPSS, the color implementation performance was significantly improved.

7 is a metal group having a laser-induced periodic surface structure (LIPSS) and a metal group (Ti layer) having a color group having a different thickness according to the time of the dry deposition process on the upper surface of the laser-induced periodic surface structure (LIPSS) It is a diagram showing a color group having a color for each viewing angle of a metal surface when deposited.

In FIG. 7, (a) is a Ni metal member (LIPSS) formed only of LIPSS, (b) is a Ni metal member (LIPSS with Sputter (<15 nm) 0, (c)) formed with a Ti layer having a thickness of 15 nm or less on the surface of LIPSS. It shows the color for each viewing angle of Ni metal members (LIPSS with Sputter (15nm)) with a Ti layer of 15nm thickness formed on the LIPSS surface.

As shown in FIG. 7, it was found that in the case of the metal member having the LIPSS formed on the surface, different colors were implemented according to the viewing angle. Accordingly, when a transparent polymer layer having a refractive index corresponding to each viewing angle among the colors included in the color group is formed on the surface, it was confirmed that a specific color corresponding to the corresponding viewing angle can be implemented on the entire surface of the metal member.

The foregoing description of the present invention is for illustration only, and a person having ordinary knowledge in the technical field to which the present invention pertains can understand that it can be easily modified to other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be interpreted to be included in the scope of the present invention.

1: Metal plate
10: metal member
11: LIPSS
20: color group embodying metal layer
21: color group implementation metal
30: transparent polymer layer

Claims (18)

Forming a laser induced periodic surface structure (LIPSS) on the surface of the metal member using a laser;
Setting a metal dry deposition process time for implementing a desired color group; And
A desired color group implementation step of performing a color deposition process on the upper surface of the laser-induced periodic surface structure of the metal member by performing a dry deposition process under the set metal dry deposition process time condition; Method for implementing the surface color of the metal, characterized in that it comprises a. The method of claim 1, wherein the laser,
Femtosecond laser characterized in that the surface color implementation method. The method of claim 1, wherein forming the laser induced periodic surface structure comprises:
Method of implementing a surface color of a metal, characterized in that the laser-induced periodic surface structure is formed to have a pattern for expressing a predetermined color. The method of claim 1, wherein the metal constituting the metal member is either a non-ferrous metal or an iron-based metal. The non-ferrous metal of claim 4,
Method of implementing a surface color of gold, characterized in that at least one selected from the group consisting of Cu, Zn, Au, Ag, Al, Ti, W, Ni, Mo, Co, Mg or alloys thereof. The method of claim 4, wherein the iron-based metal,
Method of implementing a surface color of a metal, characterized in that at least one selected from the group containing Fe or Fe alloy. The method according to claim 1, wherein the color group-implemented metal deposited by the dry deposition process,
Method of implementing a surface color of a metal, characterized in that at least one selected from the group containing metals or alloys of metals having a melting point of 1500 ° C or higher. The method of claim 1, wherein the color group implementing metal deposited by the dry deposition process is at least one selected from the group consisting of Ni, Ti, Zr or alloys thereof. According to claim 1, After the step of implementing the color of the desired color group,
A step of applying a surface refractive index to form a transparent polymer layer having a refractive index corresponding to a specific viewing angle on the top of the color group-implemented metal layer to express a specific color among colors included in the desired color group expressed according to a viewing angle; Method for implementing the surface color of the metal, characterized in that comprises a. Metal member;
A laser induced periodic surface structure (LIPSS) formed on the metal member; And
A metal plate material having a surface color, characterized in that it comprises: a color group-implemented metal layer formed by dry deposition during a dry deposition process time corresponding to an implementation of a desired color group. The method of claim 10, wherein the laser,
Metal plate with a surface color characterized by a femtosecond laser. 11. The method of claim 10, The step of forming the laser-induced periodic surface structure,
A metal plate with a surface color characterized in that the laser-induced periodic surface structure is formed to have a pattern for expressing a predetermined color. 11. The method of claim 10, The metal constituting the metal member.
Metal plate with a surface color characterized in that it is either a non-ferrous metal or an iron-based metal. The method of claim 13, wherein the non-ferrous metal,
Metal plate material having a surface color, characterized in that at least one selected from the group consisting of Cu, Zn, Au, Ag, Al, Ti, W, Ni, Mo, Co, Mg or alloys thereof. The method of claim 13, wherein the iron-based metal,
Metal plate material having a surface color, characterized in that at least one selected from the group containing Fe or Fe alloy. The method of claim 10, wherein the color group-implemented metal deposited by the dry deposition process,
Metal plate material having a surface color, characterized in that at least one selected from the group containing a metal or an alloy of metal having a melting point of 1500 ° C or higher. The method of claim 10, wherein the color group-implemented metal deposited by the dry deposition process,
Metal plate material with a surface color, characterized in that at least one selected from the group containing Ni, Ti, Zr or alloys thereof. The method of claim 10,
A surface color characterized in that it further comprises a transparent polymer layer having an index of refraction controlled to express a specific color among colors included in the desired color group expressed according to a viewing angle on the upper portion of the color group-implemented metal layer. Metal plate material.

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