WO2018043637A1

WO2018043637A1 - Metal molded body surface roughening method

Info

Publication number: WO2018043637A1
Application number: PCT/JP2017/031328
Authority: WO
Inventors: 板倉雅彦; 片山昌広; 宇野孝之
Original assignee: ダイセルポリマー株式会社
Priority date: 2016-09-02
Filing date: 2017-08-31
Publication date: 2018-03-08
Also published as: TW201815501A; KR20190044611A; TWI737802B; KR102359488B1

Abstract

Provided is a surface roughening method for roughening the surface of a metal molded body capable of being used as a production intermediate for a composite molded body comprising the metal molded body and resin, rubber, metal or the like. The metal molded body surface roughening method includes a step of using a laser device to irradiate the surface of the metal molded body with laser light having an energy density at least equal to 1 MW/cm² and an irradiation speed at least equal to 2000 mm/sec. The laser light irradiation step is a step in which, when the surface of the metal molded body to be surface-roughened is irradiated with laser light in such a way as to form straight lines, curved lines, or a combination of straight lines and curved lines, irradiation is performed in such a way that parts irradiated with the laser light and parts not irradiated with the laser light are generated alternately.

Description

Method of roughening a metal molded body

The present invention relates to a method for roughening a metal molded body that can be used as an intermediate for producing a composite molded body of a metal molded body and a resin, rubber, or metal.
Background art

A technique is known in which a composite molded body made of a metal molded body and a resin molded body is integrated after the surface of the metal molded body is roughened. In Japanese Patent No. 5774246, the surface of the metal molded body is roughened by continuously irradiating the surface of the metal molded body with a laser beam at an irradiation speed of 2000 mm / sec or more using a continuous wave laser. A method of roughening a metal molded body (claim 1) is described. After carrying out the roughening method of the invention of Japanese Patent No. 5774246, the composite molded body obtained by bonding to the resin molded body is bonded to the metal molded body and the resin molded body with high bonding strength (Patent No. 1). No. 5701414).
Summary of the Invention

The present invention provides a roughening method for a metal molded body for roughening the surface of a metal molded body that can be used as an intermediate for producing a composite molded body of a metal molded body and a resin, rubber, metal, or the like. The task is to do.
Means for solving the problem

The present invention is a method of roughening a metal molded body,
The surface of the metal molded body is irradiated with laser light at an irradiation speed of 2000 mm / sec or more at an energy density of 1 MW / cm ² or more using a laser device,
When irradiating the laser beam so that the laser beam irradiation process is a straight line, a curve, or a combination of a straight line and a curve on the surface of the metal molded body to be roughened, Provided is a method for roughening a metal formed body, which is a step of irradiating so that irradiated portions are alternately generated.

According to the method for roughening a metal molded body of the present invention, the surface of the metal molded body can be made into a complicated porous structure. For this reason, the roughened metal molded body can be used for manufacturing a composite molded body with a molded body made of resin, rubber, metal, or the like.

The figure which shows the irradiation state of the laser beam of one Embodiment when enforcing the roughening method of the metal molded object of this invention. It is a figure which shows the irradiation pattern of a laser beam when implementing the roughening method of the metal molded object of this invention, (a) is the irradiation pattern of the same direction, (b) is a bidirectional irradiation pattern. (A) And (b) is a figure for demonstrating the irradiation process of the laser beam in another embodiment of this invention. The perspective view of the metal forming body used in the Example. The SEM photograph of the surface when the aluminum molded object is roughened in Example 1. FIG. (A) is a SEM photograph of the surface when the aluminum molded body is roughened in Example 4, and (b) is a cross-sectional SEM photograph. The SEM photograph of the surface when the aluminum molded object is roughened in Example 5. FIG. (A) is the SEM photograph of the surface when the aluminum molded body is roughened in Example 8, and (b) is the SEM photograph of the cross section. The SEM photograph of the surface when an aluminum molded object is roughened in Example 13. FIG. (A) is the SEM photograph of the surface when the aluminum molded body is roughened in Example 16, and (b) is the SEM photograph of the cross section. The SEM photograph of the surface when a stainless steel molded body is roughened in Example 18. (A) is the SEM photograph of the surface when the stainless steel molded body is roughened in Example 20, and (b) is the SEM photograph of the cross section. The figure for demonstrating the laser irradiation method in Examples 23-25 and Comparative Examples 1-3. (A)-(c) is a figure for demonstrating the measuring method of the deformation amount in Examples 23-25 and Comparative Examples 1-3. The SEM photograph of the surface when the aluminum molded object is roughened in Example 30. FIG. The SEM photograph of the surface when the aluminum molded object is roughened in Example 31. FIG. The SEM photograph of the surface when an aluminum molded object is roughened in Example 32. FIG. The SEM photograph of the surface when an aluminum molded object is roughened in Example 33. FIG.

The method of roughening the metal molded body of the present invention is to irradiate laser light under laser light irradiation conditions different from the laser light irradiation conditions described in the inventions of Japanese Patent Nos. 5774246 and 5701414. Similar to the inventions of Japanese Patent Nos. 5774246 and 5701414, the surface of the metal molded body is roughened.

In the method for roughening a metal molded body according to the present invention, a laser device is used on the surface of the metal molded body to emit laser light at an energy density of 1 MW / cm ² or more and an irradiation speed of 2000 mm / sec or more. It has the process of irradiating.

The metal of the metal molded body used in the present invention is not particularly limited, and can be appropriately selected from known metals according to applications. Examples include those selected from cermets such as iron, various stainless steels, aluminum, zinc, titanium, copper, brass, chromium-plated steel, magnesium and alloys containing them, tungsten carbide, chromium carbide, etc. On the other hand, it can be applied to those subjected to surface treatment such as alumite treatment and plating treatment.

The shape of the metal molded body used in the present invention is not particularly limited, and a shape according to the application can be used. The thickness of the metal molded body is not particularly limited, but the method for roughening a metal molded body according to the present invention is less likely to cause deformation such as warping even when the molded body having a small thickness is roughened. Excellent in terms. For this reason, it is suitable for a thin metal molded body having a thickness of 10 mm or less where the laser beam is irradiated, preferably 5 mm or less, more preferably 2 mm or less, and even more preferably 1 mm or less. It is suitable for.

The laser apparatus used in the present invention may be any apparatus that has an energy density of 1 MW / cm ² or more and can perform laser irradiation at an irradiation speed of 2000 mm / sec or more.

The energy density at the time of laser light irradiation is obtained from the laser light output (W) and the laser light (spot area (cm ² ) (π · [spot diameter / 2] ² ). Energy at the time of laser light irradiation density is preferably ² ~ 1000MW / cm 2, more preferably ^{10 ~ 800MW / cm 2, 10} ~ 700MW / cm 2 is more preferable. since the energy density is too high metal will sublimes without melting, complex A hole having a simple structure is not formed.

The irradiation rate of laser light is preferably 2,000 to 20,000 mm / sec, more preferably 2,000 to 18,000 mm / sec, and further preferably 3,000 to 15,000 mm / sec.

The output of the laser beam is preferably 4 to 4000 W, more preferably 50 to 2500 W, further preferably 150 to 2000 W, and further preferably 150 to 1500 W. The wavelength is preferably 500 to 11,000 nm. The beam diameter (spot diameter) is preferably 5 to 80 μm, more preferably 5 to 40 μm.

The defocus distance is preferably -5 to +5 mm, more preferably -1 to +1 mm, and further preferably -0.5 to +0.1 mm. The defocus distance may be irradiated with laser with a set value being constant, or laser irradiation may be performed while changing the defocus distance. For example, at the time of laser irradiation, the defocusing distance may be decreased, or may be periodically increased or decreased.

In the present invention, when the metal molded body is irradiated with laser light so as to satisfy the above energy density and irradiation speed, a part of the surface of the metal molded body is evaporated while being melted, so that a hole having a complicated structure is formed. Is done. On the other hand, if the energy density and irradiation speed described above are not satisfied, the surface of the metal formed body is sublimated to form holes (holes formed by normal pulse laser irradiation) or melted (laser welding). Therefore, a hole having a complicated structure is not formed.

In the roughening method of the metal molded body of the present invention, the above-described energy density and irradiation speed are satisfied, and then the surface of the metal molded body to be roughened is a straight line, a curve, or a combination of a straight line and a curve. When irradiating the laser beam so as to be, the irradiation is performed so that the irradiated portion and the non-irradiated portion of the laser beam are alternately generated. The laser beam is irradiated on the surface of the metal molded body so as to draw a straight line, a curve, or a combination of a straight line and a curved line. At that time, each of the straight line and the curve is composed of alternately irradiated portions and non-irradiated portions of the laser beam. The

Referring to FIG. 1, an embodiment in which irradiation is performed so that laser beam irradiation portions and non-irradiation portions are alternately generated is included. In FIG. 1, the non-irradiated portions 2 of the length L2 between the irradiated portions 1 of the laser beam of length L1 and the adjacent irradiated portions 1 of the laser beam of length L1 are alternately generated as a whole. The state irradiated so that it may form in a dotted line is shown. The dotted lines include chain lines such as a one-dot chain line and a two-dot chain line.

At this time, laser light can be repeatedly irradiated to form a dotted line extending on a single straight line as shown in FIG. The number of repetitions (number of irradiations) can be set to 1 to 20 times, for example. In addition, when irradiating multiple times, the laser light irradiation part may be the same, or by changing the laser light irradiation part (shifting the laser light irradiation part), the entire linear irradiation is rough. You may make it face.

When the laser beam is irradiated multiple times with the same laser beam irradiated part, the laser beam is irradiated in a dotted line, but the laser beam irradiated part is shifted, i.e., the laser beam is not irradiated on the part that was initially irradiated with the laser beam. It is preferable to repeat the irradiation so that the irradiated portions overlap so that even if the irradiation is performed in a dotted line shape, the irradiation is finally performed in a solid line state. The dotted line irradiated / non-irradiated part and the solid line irradiated part may be hereinafter referred to as “line”.

When laser light is continuously irradiated to a metal molded body, the temperature of the irradiated surface rises, so deformation such as warpage may occur in a molded body with a small thickness, so measures such as cooling are necessary. It may become. However, as shown in FIG. 1, when laser irradiation is performed in the form of a dotted line, the laser light irradiation portion 1 and the laser light non-irradiation portion 2 are alternately generated, and the laser light non-irradiation portion 2 is cooled. When laser light irradiation is continued, deformation such as warpage is less likely to occur even with a molded product having a small thickness. At this time, the same effect can be obtained even when the laser light irradiation portion is changed (the laser light irradiation portion is shifted) as described above.

Also, when the laser beam is continuously irradiated to the metal molded body, the temperature of the irradiated surface rises, and fine metal particles in the molten state scatter and adhere to the metal molded body and its surrounding members and remain as spatter. As shown in FIG. 1, it is preferable to perform laser irradiation in a dotted line because the amount of sputtering can be reduced as compared with the case of continuous laser irradiation.

The laser light irradiation method is a method of irradiating the surface of the metal molded body 10 in one direction as shown in FIG. 2 (a) to form a plurality of lines, or a dotted line shown in FIG. 2 (b). Thus, a method of forming a plurality of lines by irradiating from both directions can be used. Thereby, a desired region on the surface of the metal molded body 10 can be roughened. In addition, the method of irradiating so that the dotted line irradiation part of a laser beam may cross | intersect may be sufficient.

The interval b1 between the dotted lines after the irradiation can be adjusted according to the irradiation target area of the metal molded body, and is, for example, in the range of 0.01 to 5 mm, preferably in the range of 0.02 to 3 mm. More preferably, it can be in the range of 0.03 to 1 mm. That is, irradiation can be performed so as to form a required number of lines according to the area of the roughened region. The lines can be formed adjacent to each other, and every other line (for example, an odd number of lines to be formed) is formed by the first scanning of the laser beam, and the remaining lines ( (Even numbered lines) may be formed in any order.

The length (L1) of the laser light irradiated portion 1 and the length (L2) of the non-irradiated portion 2 shown in FIG. 1 are in the range of L1 / L2 = 1/9 to 9/1, preferably 2 / Adjustment can be made to be in the range of 8 to 8/2. If this ratio is large, the efficiency of the roughening process will be improved, but the cooling effect will be low, and if the ratio is small, the cooling effect will be good, but the roughening efficiency will be poor. The ratio can be determined in consideration of the balance between cooling and roughening according to the material used and the desired degree of roughening. The length (L1) of the laser-irradiated portion 1 is preferably 0.05 mm or more, more preferably 0.1 to 10 mm, and more preferably 0.3 to 7 mm in order to roughen a complex porous structure. Is more preferable.

In a preferred embodiment of the metal surface roughening method according to the present invention, the laser beam irradiation step includes a fiber laser device in which a direct modulation type modulation device that directly converts a laser driving current is connected to a laser power source. The laser is irradiated by adjusting the duty ratio by using it.

There are two types of laser excitation, pulse excitation and continuous excitation, and pulse wave lasers based on pulse excitation are generally called normal pulses.

It is possible to create a pulse wave laser even with continuous excitation, Q-switched pulse oscillation method that oscillates a laser with higher peak power by shortening the pulse width (pulse ON time) than the normal pulse, External modulation system that generates a pulse wave laser by temporally cutting light with an LN optical intensity modulator, a method of mechanically chopping and pulsing, a method of pulsing by operating a galvanometer mirror, and laser driving A pulse wave laser can be produced by a direct modulation method in which a current is directly modulated to generate a pulse wave laser.

The method of pulsing by operating the galvanometer mirror is a method of irradiating the laser beam oscillated from the laser oscillator via the galvanometer mirror by a combination of the galvanometer mirror and the galvanometer controller. In this case, the laser light irradiation process uses a combination of a galvano mirror and a galvano controller, and the laser light continuously oscillated from the laser oscillator is pulsed by the galvano controller, so that the ON time of the laser light output and This is a step of adjusting the duty ratio calculated by the following formula from the OFF time and irradiating the laser light irradiation portion and the non-irradiation portion alternately via the galvano mirror. Specifically, as follows Can be implemented.

The Gate signal is periodically turned on / off from the galvano controller, and the laser light oscillated by the laser oscillator is turned on / off by the ON / OFF signal, thereby pulsing without changing the energy density of the laser light. Can do. As a result, as shown in FIG. 1, non-irradiated portions of the laser light between the irradiated portion 1 of the laser light and the adjacent irradiated portion 1 of the laser light are alternately generated so as to be formed as a dotted line as a whole. Laser light can be irradiated. The method of pulsing by operating the galvanometer mirror is easy to operate because the duty ratio can be adjusted without changing the oscillation state of the laser beam itself.

Among these methods, since it is a method that can be easily pulsed (irradiated so that irradiated portions and non-irradiated portions occur alternately) without changing the energy density of the continuous wave laser, it is mechanically A method of chopping and pulsing, a method of pulsing by operating a galvanometer mirror, or a direct modulation method of directly modulating a laser driving current to generate a pulse wave laser is preferable. This direct modulation method uses a fiber laser device in which a direct modulation method modulation device that directly converts the laser drive current is connected to the laser power supply, thereby creating a pulse wave laser by continuously exciting the laser. This is different from the continuous wave laser used for roughening the metal molded body in Japanese Patent Nos. 5774246 and 5701414.

The duty ratio is a ratio obtained from the ON time and OFF time of the laser light output by the following equation.
Duty ratio (%) = ON time / (ON time + OFF time) × 100
Since the duty ratio corresponds to L1 and L2 (that is, L1 / [L1 + L2]) shown in FIG. 1, it can be selected from a range of 10 to 90%, preferably a range of 20 to 80%. As a result, it is possible to irradiate laser light irradiation portions and non-irradiation portions alternately.

∙ Irradiation with a dotted line as shown in Fig. 1 is possible by adjusting the duty ratio and irradiating laser light. When the duty ratio is large, the efficiency of the roughening process is improved, but the cooling effect is low. When the duty ratio is small, the cooling effect is improved, but the roughening efficiency is deteriorated. It is preferable to adjust the duty ratio according to the purpose.

In another preferred embodiment of the method for roughening a metal molded body of the present invention, the laser light irradiation step described above passes the laser light at intervals on the surface of the metal molded body to be roughened. The laser is continuously irradiated with the masking material not to be placed. The masking material may or may not be in direct contact with the metal formed body. When irradiating a plurality of times for each line, the entire metal formed body can be roughened by changing the position of the masking material.

In this embodiment, as shown in FIG. 3A, the laser is continuously irradiated in a state where a plurality of masking materials 11 are arranged on the metal molded body 10 at intervals. As the masking material, a metal having a low thermal conductivity can be used. Thereafter, when the masking material 11 is removed, a dotted line is formed in which the irradiated portions and the non-irradiated portions of the laser light are alternately generated as in FIG.

In the case of the embodiment shown in FIG. 3 as well, the masking material 11 is cooled, so that when the laser light irradiation is continued, deformation such as warpage is less likely to occur even in a molded product having a small thickness. Therefore, it is preferable.

The length (L1) of the laser light irradiation portion 1 and the length (L2) of the laser light non-irradiation portion 2 are in the range of L1 / L2 = 1/9 to 9/1 (ie, L1 / [L1 + L2]). 10 to 90%). The length (L1) of the laser-irradiated portion 1 is preferably 0.05 mm or more, preferably 0.1 to 10 mm, and preferably 0.3 to 7 mm in order to roughen a complex porous structure. More preferred.

A known continuous wave laser can be used, for example, YVO ₄ laser, fiber laser (single mode fiber laser, multimode fiber laser), excimer laser, carbon dioxide laser, ultraviolet laser, YAG laser, semiconductor laser, A glass laser, ruby laser, He—Ne laser, nitrogen laser, chelate laser, or dye laser can be used.

By carrying out the roughening method of the metal molded body of the present invention, a porous structure can be formed on the surface of the metal molded body (including a range from the surface to a depth of about 500 μm), specifically a patent. FIG. 7, FIG. 8, FIG. 24 to FIG. 26 and FIG. 29 of Japanese Patent No. 5774246, and FIG. 7, FIG. 8, FIG. 24 to FIG. 26 of FIG. A porous structure can be obtained.
Example

Examples 1 to 16
The entire surface (20 mm ² wide range) of the metal molded body 50 (aluminum A5052) having the shape and dimensions shown in FIG. The light irradiation surface was roughened.

The following laser equipment was used.
Oscillator: IPG-Yb fiber; YLR-300-SM
Condensing system: fc = 80 mm / fθ = 100 mm
Defocus distance: ± 0 mm (constant)
Pulse wave converter: Pulse generator FG110 (synthesized function generator), manufactured by Yokogawa Electric Corporation

The groove depth was measured with a digital microscope VHX-900 (manufactured by Keyence Corporation) on the surface 51 after laser light irradiation. The average groove depth was measured at 10 locations to obtain an average value. The maximum groove depth was the value of the deepest part among the 10 points measured.

The tensile strength was determined by a tensile test using a butt test piece based on ISO 19095 (tensile speed: 10 mm / min, distance between chucks: 50 mm). The butt test piece uses GF30% reinforced PA6 resin (Plastotron PA6-GF30-01 (L9): manufactured by Daicel Polymer Co., Ltd.) as the resin, and the injection molding machine uses ROBOSHOT S2000i100B manufactured by FANUC, at a resin temperature. : 280 ° C., mold temperature: obtained by injection molding at 100 ° C.

In Examples where the number of repetitions was multiple (5 or more), irradiation was performed such that each irradiation line became a solid line by shifting the irradiation part of the laser beam (no non-irradiation part was eliminated). The same applies to the following embodiments.

SEM photographs showing the surfaces of the metal molded bodies of Examples 1, 4, 5, 8, 13, and 16 shown in FIGS. 5 to 10, Example 4 (FIG. 6), Example 8 (FIG. 8), and As can be confirmed from the cross-sectional photograph of the metal molded body of Example 16 (FIG. 10), all of FIG. 7, FIG. 8, FIG. 24 to FIG. 26 and FIG. 29 of Patent No. 5774246, and FIG. 7, FIG. 8, FIG. 24 to FIG. 26, and FIG. 29 were roughened to the same complex porous structure. As can be confirmed from the numerical values of the tensile strength, it is obvious that other examples without SEM photographs were similarly roughened together with Examples 1, 4, 5, 8, 13, and 16.

When a normal pulse wave laser is used, pulse wave laser light is used in the same manner as in Comparative Examples 1, 4, and 7 of Japanese Patent No. 5774246 and Comparative Examples 1, 4, and 7 of Japanese Patent No. 5701414. In the case of irradiation, since the adjacent spots are overlapped in view of the spot diameter, pulse width, and laser beam irradiation speed, the laser beam irradiation part and the non-irradiation part do not occur alternately.

Examples 17-22
In the same manner as in Examples 1 to 16, the laser beam was formed under the conditions shown in Table 2 on the entire surface 51 (width range of 20 mm ² ) of the metal molded body 50 (stainless steel SUS304) having the shape and dimensions shown in FIG. Light was irradiated to roughen the laser light irradiation surface of the surface 51. Further, the maximum groove depth and tensile strength were measured in the same manner as in Examples 1-16.

As can be confirmed from the SEM photograph showing the surface of the metal molded body of Example 18 shown in FIG. 11 and the SEM photograph showing the surface and cross section of the metal molded body of Example 20 shown in FIG. 12, both are patents 5774246. 7, FIG. 8, FIGS. 24 to 26, and 29 of Japanese Patent Publication No. 7, and FIGS. 7, 8, 24 to 26, and 29 of Japanese Patent No. 5701414 are roughened to the same complex porous structure. It had been. As can be confirmed from the numerical values of the tensile strength, it is clear that the surface roughness was similarly achieved in Examples 18 and 20 as well as in other Examples without SEM photographs.

When a normal pulse wave laser is used, it is the same as Comparative Examples 1, 4, and 7 in Japanese Patent No. 5774246 and Comparative Examples 1, 4, and 7 in Japanese Patent No. 5701414. This is not the same as the above embodiment.

Examples 23 and 24, Comparative Examples 1 and 2
A metal plate 55 (30 mm × 30 mm) having the shape shown in FIG. 13 and having a changed thickness (Table 3) is used under the conditions shown in Table 3 for a region 56 of 20 mm × 6 mm. Laser light was irradiated in the same manner as in Examples 1 to 16 with the irradiation pattern shown in (b).

The deformation amount of the metal plate 55 after the laser beam irradiation was measured. The measurement method will be described with reference to FIGS. 14 (a) to (c). 14 (a) and 14 (b) are diagrams showing states before and after laser light irradiation, and FIG. 14 (b) exaggerates the deformation for easy understanding.

The amount of deformation is such that the metal plate 55 after laser light irradiation is placed on a measurement table 60 having a flat surface 61, and the distances d1 and d2 between the opposing surfaces and the flat surface 61 of the measurement table 60 are scaled magnifiers ( 3010S: Ikeda Lens Industry Co., Ltd.) The number of measurements is 5, and the average value obtained from (5 × d1 + 5 × d2) / 10 is shown in Table 3.

As is apparent from Table 3, although Comparative Examples 1 and 2 where the laser beam was continuously irradiated were slightly deformed, Examples 23 and 24 were not deformed (warped). From this result, it was confirmed that the roughening method of the present invention is effective for a metal molded body having a small thickness. As a result of visual confirmation, Examples 23 and 24 had a smaller amount of sputtering than Comparative Examples 1 and 2.

Example 25, Comparative Example 3
Example 25 was irradiated with laser light in the same manner as in Examples 23 and 24 under the conditions shown in Table 4, and Comparative Example 3 was irradiated with laser light in the same manner as in Comparative Examples 1 and 2 under the conditions shown in Table 4. . The amount of deformation was measured in the same manner as in Examples 23 and 24.

As is clear from Table 4, the sample was slightly deformed in Comparative Example 3 in which the laser beam was continuously irradiated, but there was no deformation (warping) in Example 25. From this result, it was confirmed that the roughening method of the present invention is effective for a metal molded body having a small thickness. As a result of visual confirmation, the amount of sputtering in Example 25 was smaller than that in Comparative Example 3.

Examples 26-33
The entire surface (20 mm ² wide range) of the metal molded body 50 (aluminum A5052) having the shape and dimensions shown in FIG. The light irradiation surface was roughened. However, the duty ratio was adjusted by a method of pulsing by operating a galvanometer mirror while continuously irradiating laser light. 15 to 18 show SEM photographs of the surfaces of the aluminum molded bodies after laser light irradiation in Examples 30 to 33. Each measurement was carried out in the same manner as in Examples 1-16.

The following laser equipment was used.
Oscillator: IPG-Yb fiber; YLR-300-SM (manufactured by IPG)
Condensing system: fc = 80 mm / fθ = 100 mm
Defocus distance: ± 0 mm (constant)
Galvano scan head: Squirrel 16 (manufactured by ARGES)
Galvano controller: ASC-1
Squirrel 16 collimator (f80mm): OPTICEL D30L-CL

As can be seen from Table 5 and FIGS. 15 to 18, even if the method of pulsing by operating the galvanometer mirror was applied, it was possible to roughen the surface by adjusting the duty ratio as in the other examples. .
For example, when “On time” in Example 26 is “100 μsec”, the frequency is 5000 Hz (5000 vibrations per second, so one vibration [for example, the interval between one mountain and the next mountain] is 200 μsec. ), 100 μsec indicates that the laser beam is irradiated, and the remaining 100 μsec indicates that the laser beam is not irradiated. At this time, the duty ratio is 100/200 = 50.
Industrial applicability

The roughened metal molded body obtained by the method for roughening a metal molded body of the present invention can be used as a production intermediate for the composite molded body described in the invention of Japanese Patent No. 5701414, The abrasive described in JP-A-2016-36884, the fine particle carrier described in JP-A-2016-7589, and the use described in paragraph No. 0037 of JP-A-2016-43413 can be used. .

Claims

A method of roughening a metal molded body,
The surface of the metal molded body is irradiated with laser light at an irradiation speed of 2000 mm / sec or more at an energy density of 1 MW / cm 2 or more using a laser device,
When irradiating the laser beam so that the laser beam irradiation process is a straight line, a curve, or a combination of a straight line and a curve on the surface of the metal molded body to be roughened, A method for roughening a metal formed body, which is a step of irradiating so that irradiated portions are alternately generated.
The laser light irradiation process uses a fiber laser device in which a direct-modulation modulation device that directly converts the laser drive current is connected to a laser power source, and is obtained from the ON time and OFF time of the laser light output according to the following formula: The method for roughening a metal molded body according to claim 1, wherein the duty ratio is adjusted and irradiation is performed such that laser light irradiation portions and non-irradiation portions alternately occur.
Duty ratio (%) = ON time / (ON time + OFF time) × 100
The method for roughening a metal molded body according to claim 2, wherein the fiber laser is a single mode fiber laser.
The laser light irradiation process uses a combination of a galvano mirror and a galvano controller, and the laser light continuously oscillated from the laser oscillator is pulsed by the galvano controller, so that the ON time and OFF time of the laser light output 2. The rough surface of the metal molded body according to claim 1, wherein the duty ratio obtained by the following formula is adjusted, and irradiation is performed so that irradiated portions and non-irradiated portions of the laser light are alternately generated via a galvanometer mirror. Method.
Duty ratio (%) = ON time / (ON time + OFF time) × 100
2. The laser light irradiation step is a step of continuously irradiating a laser with a masking material that does not allow laser light to pass therethrough on a surface of a metal molded body to be roughened. The roughening method of the metal molded object of description.
The method for roughening a metal molded body according to any one of claims 1 to 5, wherein the energy density is 2 to 1000 MW / cm 2 .
The method of roughening a metal molded body according to any one of claims 1 to 6, wherein the metal molded body is a molded body having a thickness of 5 mm or less at a portion irradiated with laser light.