Metal structural member with damascene pattern, manufacturing method thereof and electronic equipment

Abstract

The invention provides a metal structural part with a Damascus pattern, a manufacturing method thereof and electronic equipment, the metal structural part comprises first metal and second metal, the density of the first metal is smaller than that of the second metal, the corrosion resistance of the first metal is larger than that of the second metal, on the surface of the metal structural part, the first metal is in a polishing effect, and the second metal is in a matte effect. Damascus patterns are formed on the surface of the metal structural part through the polishing effect and the matte effect. The density of the first metal is smaller than that of the second metal, so that the density of the metal structural part can be reduced, and the density of the metal structural part can be adjusted by adjusting the mass ratio of the first metal to the second metal, so that the lightweight design of the metal structural part can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of terminals, and particularly to a metal structural member with a Damascus pattern, a manufacturing method thereof, and an electronic device. Background Art

[0002] In the current technology, in order to present a Damascus pattern on the surface of the housing, SUS304 stainless steel and SUS316 stainless steel can be used. After folding and forging, they are combined together, and then through processing, shaping, polishing treatment, and pickling treatment, a Damascus pattern is formed. However, due to the relatively high density of stainless steel, about 7.9 g / cm 3 , the density of the produced housing is relatively large, and the mass is relatively large, which is not conducive to lightweight design. Summary of the Invention

[0003] The present application provides a metal structural member with a Damascus pattern, a manufacturing method thereof, and an electronic device, which can not only form a Damascus pattern but also realize the lightweight design of the metal structural member.

[0004] In a first aspect, an embodiment of the present application provides a metal structural member, which may include: a first metal and a second metal. The density of the first metal is less than that of the second metal, and the corrosion resistance of the first metal is greater than that of the second metal. On the surface of the metal structural member, the first metal presents a polished effect, and the second metal presents a matte effect, so that a Damascus pattern is formed on the surface of the metal structural member. Thus, because the density of the first metal is less than that of the second metal, the density of the metal structural member can be reduced, and by adjusting the mass ratio of the first metal and the second metal, the density of the metal structural member can be adjusted, so as to realize the lightweight design of the metal structural member on the basis of forming a Damascus pattern.

[0005] Optionally, the manufacturing material of the first metal may include a titanium alloy or a zirconium alloy. Since the densities of the titanium alloy and the zirconium alloy are both relatively low, using a titanium alloy or a zirconium alloy is beneficial to reducing the density of the metal structural member. The manufacturing material of the second metal may include stainless steel. Stainless steel is a traditional material for making Damascus patterns in traditional processes, so using stainless steel is beneficial to reducing the manufacturing difficulty of making Damascus patterns. And, since the density of the titanium alloy is about 4.5 g / cm 3 , and the density of the stainless steel is about 7.9 g / cm 3 , so when using a titanium alloy and stainless steel to make a metal structural member, by adjusting the mass ratio of the titanium alloy and the stainless steel, the comprehensive density of the metal structural member can be between 4.8 g / cm 3 and 7 g / cm 3 , so as to realize the lightweight design of the metal structural member. The density of the zirconium alloy is about 6.5 g / cm 3, by adjusting the mass ratio of zirconium alloy and stainless steel, the comprehensive density of the metal structural member can also be made to be around 7 g / cm 3 or so, thus enabling the lightweight design of the metal structural member. In addition, since the polished effect presented by the titanium alloy or zirconium alloy and the matte effect presented by the stainless steel belong to the black and white color system, the Damascus pattern formed also belongs to the black and white color system, which improves the aesthetic degree and sense of low profile compared with the colored Damascus pattern.

[0006] Optionally, the production material of the first metal may include, but is not limited to, other types of titanium alloys such as TC4 titanium alloy or TA1 titanium alloy, and the production material of the second metal may include, but is not limited to, other types of stainless steels such as SUS304 stainless steel or SUS316 stainless steel. Specific selection can be made according to the actual situation and is not limited here. After being polished, the TC4 titanium alloy can present a mirror-like polished effect, so that the mirror-like polished effect and the matte effect are presented alternately, and a relatively obvious Damascus pattern can be formed. Although the TA1 titanium alloy presents a non-mirror polished effect after being polished, a Damascus pattern can still be formed when it is presented alternately with the matte effect. It should be understood that the TA1 titanium alloy is an alloy mainly including titanium and iron, and titanium is the main component; the TC4 titanium alloy is an alloy mainly including titanium, aluminum, and vanadium, and titanium is the main component; the SUS304 stainless steel is mainly composed of: an alloy of iron, chromium, and nickel, and iron is the main component; the SUS316 stainless steel is mainly composed of: an alloy of iron, chromium, nickel, and molybdenum, and iron is the main component.

[0007] Optionally, there is a transition layer between the first metal and the second metal. This is because when the first metal and the second metal are two different types of metals, there are significant differences in their components, so a transition layer will be formed at the interface where the two are combined. The existence of this transition layer indicates that there is a good bonding force between the first metal and the second metal, which can improve the structural stability of the metal structural member, thereby improving the reliability of the metal structural member. It should be noted that when the Damascus pattern is formed by two types of stainless steels, although the specific components of the two types of stainless steels are different, they belong to the same type of metal and have a similar component system, so a transition layer is generally not formed when they are combined.

[0008] Optionally, the metal structural member may further include a protective film that covers the first metal and the second metal. That is to say, when the structure composed of the first metal and the second metal is regarded as the initial structural member, the surface of the initial structural member may exhibit a Damascus pattern, and the protective film covers the initial structural member. Of course, the protective film also covers the Damascus pattern on the surface of the initial structural member, so that the protective film can protect the initial structural member and prevent it from being scratched by the outside world. Furthermore, the protective film can improve the wear and scratch resistance of the metal structural member, thereby enhancing the reliability of the metal structural member. Among them, the production materials of the protective film may include chromium carbide, tungsten carbide, titanium nitride, etc., which can be specifically selected according to actual situations and are not limited herein. In addition, pigments can be provided in the protective film so that the surface of the metal structural member can exhibit a certain color to enrich the Damascus pattern and meet the design requirements of different application scenarios. Moreover, the thickness of the protective film can be set according to factors such as the requirements for wear and scratch resistance, production cost, and application scenarios. For example, if the requirements for wear and scratch resistance are relatively high and it is applied in a scenario where it is easily scratched, the thickness of the protective film can be set slightly thicker; if the requirements for wear and scratch resistance are not high and it is applied in a scenario where it is not easily scratched, the thickness of the protective film can be set slightly thinner, which can also reduce the production cost and production difficulty.

[0009] In a second aspect, an embodiment of the present application further provides a manufacturing method for a metal structural member. The manufacturing method is used to manufacture the metal structural member described in the first aspect and any one of the embodiments in the first aspect. The manufacturing method may include: performing forming processing on a plate including a first metal and a second metal; wherein, the density of the first metal is less than that of the second metal, and the corrosion resistance of the first metal is greater than that of the second metal; performing polishing processing and pickling processing on the formed structure, so that the second metal on the surface of the formed structure is corroded by the acid and presents a matte effect, and the first metal on the surface of the formed structure is not corroded by the acid and presents a polished effect, forming a Damascus pattern to obtain a metal structural member. In this way, because the density of the first metal is less than that of the second metal, the density of the metal structural member can be reduced, and by adjusting the mass ratio of the first metal and the second metal, the density of the metal structural member can be adjusted, thereby realizing the lightweight design of the metal structural member on the basis of forming the Damascus pattern.

[0010] Optionally, the polishing processing may include: using a polishing machine to polish the surface of the formed structure; the pickling processing may include: using an acid solution with a certain concentration and a specific type to corrode the surface of the formed structure, so that the second metal is corroded by the acid and presents a matte effect, and the first metal is not corroded by the acid and presents a polished effect, thereby forming a Damascus pattern.

[0011] Further, when performing pickling treatment, the type of pickling solution selected is related to the types of the first metal and the second metal. Taking the first metal as a titanium alloy and the second metal as stainless steel as an example, when performing pickling treatment, the type of acid used needs to match stainless steel, and of course also match the titanium alloy, so that the acid can corrode the stainless steel but not the titanium alloy, thereby making the stainless steel present a matte effect and the titanium alloy present a polished effect. For example, when using SUS304 stainless steel, the acid used can be hydrochloric acid; when using SUS316 stainless steel, the acid used can be a mixture of hydrochloric acid and ferric chloride. Since the titanium alloy can be corroded by HF but not by hydrochloric acid or a mixture of hydrochloric acid and ferric chloride, the titanium alloy will not be corroded when the stainless steel is corroded, so that the titanium alloy can present a polished effect. Or, taking the first metal as a zirconium alloy and the second metal as stainless steel as an example, when using zirconium alloy profiles and stainless steel profiles, the acid selected is not limited to hydrochloric acid, and can be other types of acids or mixtures of acids, as long as it can corrode the stainless steel without corroding the zirconium alloy, and no specific limitation is made here.

[0012] Optionally, the manufacturing method of the sheet including the first metal and the second metal may include: performing folding forging treatment on the profile including the first metal and the profile including the second metal to obtain the sheet. Among them, when performing folding forging, the specific process may include: forging the profiles of the first metal and the second metal into strips respectively, then performing melting, and then folding or twisting them into a twist shape, and then casting them into a sheet. In this way, through the folding forging process, the profiles of the first metal and the second metal can be combined together, so that a sheet including the first metal and the second metal can be obtained. And because the folding forging process is used when forming the sheet, the Damascus pattern finally presented is random, uncontrollable, and non-repeatable, so that the presented Damascus pattern has uniqueness and uniqueness.

[0013] Or, optionally, the manufacturing method of the sheet including the first metal and the second metal may further include: making grooves on the surface of the profile including the first metal; adding the powder of the second metal into the grooves and performing sintering treatment to obtain the sheet. Since the powder of the second metal is added into the grooves on the surface of the profile of the first metal to form the sheet, the thickness of the sheet can be controlled, so that an ultra-thin sheet can be made, and then an ultra-thin metal structural member can be made, thereby further reducing the weight of the metal structural member.

[0014] Moreover, since the powder of the second metal is added into the groove, the position of the second metal in the plate including the first metal and the second metal is thus defined. When pickling treatment is carried out, if the second metal is corroded by the acid to present a matte effect and the first metal is not corroded by the acid and presents a polished effect, then the position where the matte effect is located corresponds to the addition position of the powder of the second metal, and thus corresponds to the setting position of the groove. Therefore, through this manufacturing method, a Damascus pattern can be manufactured according to the design requirements. In other words, by setting parameters such as the setting position, the number of settings, and the shape of the groove of the groove, the pre-designed Damascus pattern can be presented on the surface of the metal structural member, so that different metal structural members can have the same Damascus pattern on their surfaces, realizing the mass production of metal structural members with the same Damascus pattern, making this manufacturing method have good practicability and repeatability.

[0015] Optionally, this manufacturing method may further include: before obtaining the metal structural member, and after polishing treatment and pickling treatment are carried out on the formed structure, a protective film is formed on the surface of the formed structure. Among them, a coating process can be used to form a protective film on the surface of the formed structure (that is, the initial structural member mentioned above), and this protective film can protect the formed structure, thereby improving the reliability of the metal structural member.

[0016] It should be understood that since the principle of solving problems of the metal structural member manufactured by this manufacturing method is similar to the principle of solving problems of the foregoing metal structural member, the implementation and technical effects of this manufacturing method can refer to the implementation and technical effects of the foregoing metal structural member, and the repeated parts will not be elaborated.

[0017] In a third aspect, an embodiment of the present application further provides an electronic device, which may include the metal structural member introduced in the first aspect and any one of the embodiments in the first aspect as described above. Based on the characteristics that the metal structural member has a lightweight design and a Damascus pattern, it is beneficial to reduce the weight of the electronic device and can also improve the aesthetic degree of the electronic device. Among them, the electronic device may be, but is not limited to: smart phones, smart TVs, smart TV set-top boxes, smart watches, personal computers (PCs), wearable devices, smart broadband and other devices, which will not be listed one by one here.

[0018] It should be understood that since the principle of solving problems of this electronic device is similar to the principle of solving problems of the foregoing metal structural member, the implementation and technical effects of this electronic device can refer to the implementation and technical effects of the foregoing metal structural member, and the repeated parts will not be elaborated. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the electronic device provided by the embodiment of the present application;

[0020] Figure 2 Schematic diagram of the metal structure provided by the embodiment of the present application;

[0021] Figure 3 Partial scanning electron micrograph of the metal structure provided by the embodiment of the present application;

[0022] Figure 4 Energy spectrum scanning diagram of the metal structure provided by the embodiment of the present application;

[0023] Figure 5 Schematic diagram of the manufacturing process of the metal structure provided by the embodiment of the present application;

[0024] Figure 6 Another schematic diagram of the manufacturing process of the metal structure provided by the embodiment of the present application. Detailed implementation manners

[0025] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0026] It should be noted that the same reference numerals in the drawings of the present application represent the same or similar structures, and thus the repeated description thereof will be omitted. The terms expressing positions and directions described in the present application are illustrative with reference to the drawings, but can be changed according to needs, and all changes are included in the protection scope of the present application. The drawings of the present application are only used to illustrate the relative positional relationship and do not represent the true scale.

[0027] To facilitate the understanding of the technical solution provided by the embodiment of the present application, the application scenario thereof will be described first below.

[0028] The technical solution provided by the embodiment of the present application can be widely applied to various electronic devices. The electronic devices provided by the embodiment of the present application can include various terminal devices, and the terminal devices can include but are not limited to: smart phones, smart TVs, smart TV set-top boxes, smart watches, personal computers, wearable devices, smart broadband and other devices, which will not be listed one by one here.

[0029] Figure 1 Exemplarily shows a schematic diagram of the structure of the electronic device. Refer to Figure 1As shown, the electronic device includes: a housing 100 and components 200 disposed within the housing 100. The components 200 are provided within the housing 100, and the housing 100 includes a metal structural member, the surface of which exhibits a Damascus pattern. For example, when the electronic device is a smart watch, the metal structural member can be the outer frame of the smart watch, such that the surface of the outer frame can exhibit a Damascus pattern, enhancing the aesthetic appearance of the smart watch. Another example is that when the electronic device is a smart phone, the metal structural member can be the outer frame of the smart phone, such that the surface of the outer frame can exhibit a Damascus pattern, or the metal structural member can also be a decorative part of the camera, enhancing the aesthetic appearance of the smart phone. Still another example is that when the electronic device is a folding phone, the metal structural member can be a decorative part located at the hinge of the folding part, such that the surface of the decorative part exhibits a Damascus pattern, enhancing the aesthetic appearance of the folding phone.

[0030] In the current technology, in order to be able to present a Damascus pattern on the surface of the metal structural member, SUS304 stainless steel and SUS316 stainless steel can be used, which are combined together after folding and forging, and then formed, polished, and pickled to form a Damascus pattern. However, due to the relatively high density of stainless steel, approximately 7.9 g / cm 3 , the density of the fabricated metal structural member is relatively large, and the mass is relatively large, which is not conducive to lightweight design.

[0031] Based on this, the embodiments of the present application provide a metal structural member with a Damascus pattern, which can not only form a Damascus pattern but also achieve a lightweight design of the metal structural member.

[0032] The metal structural member will be explained and described below with specific embodiments.

[0033] Figure 2 Exemplarily shown is a schematic structural diagram of the metal structural member 10 in the embodiments provided by the present application. Referring to Figure 2 as shown, Figure 2 in which (b) is a cross-sectional view taken along the x1 - x2 direction in (a). The metal structural member 10 can include: a first metal 11a and a second metal 11b. The first metal 11a can be a titanium alloy, and the second metal 11b can be stainless steel. The density of the titanium alloy is approximately 4.5 g / cm 3, so the density of the titanium alloy is less than that of the stainless steel; the corrosion resistance of the titanium alloy is greater than that of the stainless steel, such that on the surface of the metal structural member 10, the titanium alloy can exhibit a polished effect and the stainless steel can exhibit a matte effect. The polished effect and the matte effect are distributed on the surface of the metal structural member 10, and the pattern presented is the Damascus pattern. Since the density of the titanium alloy is less than that of the stainless steel, compared with forming the Damascus pattern using SUS304 stainless steel and SUS316 stainless steel, the density of the metal structural member 10 can be reduced, and by adjusting the mass ratio of the titanium alloy and the stainless steel, the density of the metal structural member 10 can be adjusted such that the comprehensive density of the metal structural member 10 can be in the range of 4.8 g / cm 3 to 7 g / cm 3 , thereby enabling lightweight design of the metal structural member 10. In addition, since the polished effect presented by the titanium alloy and the matte effect presented by the stainless steel belong to the black and white color system, the formed Damascus pattern also belongs to the black and white color system, which improves the aesthetic appearance and sense of understatement compared with the colored Damascus pattern. It should be understood that Figure 2 the pattern shown in (a) in

[0034] is only a schematic illustration to show that the metal structural member 10 contains the first metal 11a and the second metal 11b, and the Damascus pattern is formed by the first metal 11a and the second metal 11b, but this pattern does not represent the actually presented Damascus pattern.

[0035] Moreover, in the metal structural member 10, a transition layer will be formed at the interface between the first metal and the second metal, such as Figure 3As shown, this figure is a partial scanning electron microscope image of the metal structural part 10. Taking the first metal as TC4 titanium alloy and the second metal as SUS304 stainless steel as an example, what is shown within the dashed box 1 is the TC4 titanium alloy, what is shown within the dashed box 2 is the SUS304 stainless steel, and what is shown within the dashed box 3 is the transition layer; and combined with Figure 4 the energy spectrum scanning results shown, and Figure 4 it is for Figure 3 the position shown by the dashed line 4 in Figure 3 to conduct energy spectrum scanning. In this transition layer, on the side close to the TC4 titanium alloy (such as Figure 3 the left side of the dashed box 3 shown in

[0036] From Figure 3 and Figure 4 the data shown, it can be seen that the transition layer contains both Ti and Fe, indicating that this transition layer is formed when the titanium alloy and the stainless steel are combined, and further indicating that there is a transition layer between the titanium alloy and the stainless steel.

[0037] Since the titanium alloy and the stainless steel are two different types of metals and there are significant differences in their components, a transition layer will be formed at the interface where they are combined. The existence of this transition layer indicates that there is good bonding force between the titanium alloy and the stainless steel, which can improve the structural stability of the metal structural part 10, thereby enhancing the reliability of the metal structural part 10. It should be noted that when the Damascus pattern is formed by two types of stainless steel, although the specific components of the two types of stainless steel are different, they belong to the same type of metal and have a similar component system. Therefore, it is very difficult to observe the transition layer between the two types of stainless steel even in the electron microscope image. In other words, because the two types of stainless steel have a similar system, they generally do not form a transition layer when combined.

[0038] The metal structure 10 may include an initial structure 11 and a protective film 12. The surface of the initial structure 11 presents a Damascus pattern. Therefore, the initial structure 11 includes a first metal and a second metal. Moreover, the protective film 12 covers the initial structure 11. Of course, the protective film 12 also covers the Damascus pattern on the surface of the initial structure 11, so that the protective film 12 can protect the initial structure 11 from being scratched by the outside world. Furthermore, the protective film 12 can enhance the wear and scratch resistance of the metal structure 10, thereby improving the reliability of the metal structure 10. Among them, the manufacturing materials of the protective film 12 may include chromium carbide, tungsten carbide, titanium nitride, etc., and can be specifically selected according to actual situations, which are not limited herein. And pigments can be provided in the protective film 12, so that the surface of the metal structure 10 can present a certain color to enrich the Damascus pattern and meet the design requirements of different application scenarios. In addition, the thickness of the protective film 12 can be set according to factors such as requirements for wear and scratch resistance, manufacturing cost, and application scenarios. For example, if the requirements for wear and scratch resistance are high and it is applied in a scenario where it is easy to be scratched, the thickness of the protective film 12 can be set slightly thicker; if the requirements for wear and scratch resistance are not high and it is applied in a scenario where it is not easy to be scratched, the thickness of the protective film 12 can be set slightly thinner, which can also reduce the manufacturing cost and the manufacturing difficulty.

[0039] In another embodiment provided by the present application, the metal structure in this embodiment is basically similar to the structure of the metal structure in the foregoing Figure 2 shown embodiment. The difference is that the first metal can be a zirconium alloy and the second metal can be stainless steel. Exemplarily, the density of the zirconium alloy is about 6.5 g / cm 3 , so the density of the zirconium alloy is less than that of stainless steel. Also, because the corrosion resistance of the zirconium alloy is greater than that of stainless steel, on the surface of the metal structure, the zirconium alloy can present a polished effect and the stainless steel can present a matte effect, and the polished effect and the matte effect form a Damascus pattern on the surface of the metal structure. Since the density of the zirconium alloy is less than that of stainless steel, the density of the metal structure can be reduced, and by adjusting the mass ratio of the zirconium alloy and stainless steel, the comprehensive density of the metal structure can be about 7 g / cm 3 or so, thereby realizing the lightweight design of the metal structure.

[0040] Among them, the zirconium alloy can be but is not limited to various types of zirconium alloys, such as but not limited to zirconium tin alloys and zirconium niobium alloys and other types of zirconium alloys; the stainless steel can be but is not limited to SUS304 stainless steel or SUS316 stainless steel and other types of stainless steels, and can be specifically selected according to actual situations, which are not limited herein.

[0041] It should be understood that the metal structure in this embodiment is the same as the foregoing Figure 2For the structural similarities of the metal structural members in the illustrated embodiments, reference may be made to the relevant descriptions in the foregoing Figure 2 illustrated embodiments, and the repeated parts will not be elaborated here.

[0042] Figure 5 Exemplarily shown is a schematic diagram of the manufacturing method of the metal structural member in the embodiment provided by the present application. Referring to Figure 5 as shown, the manufacturing method may include:

[0043] Step S1: As shown in (a) to (c) of Figure 5 , using but not limited to titanium alloy profile m1 and stainless steel profile m2, folding and forging the titanium alloy profile m1 and the stainless steel profile m2 to obtain sheet m3;

[0044] Among them, when performing folding forging, the specific process may include: forging the titanium alloy profile m1 and the stainless steel profile m2 into strips respectively, then melting, and then folding or twisting them into a twist shape, and then casting them into sheet m3.

[0045] Step S2: As shown in (d) of Figure 5 , performing forming processing on the sheet to obtain the initial structural member 11;

[0046] Step S3: As shown in (e) and (f) of Figure 5 , using a polishing machine to polish the initial structural member 11, and then performing pickling treatment, so that the stainless steel on the surface of the initial structural member 11 is corroded by the acid and presents a matte effect, and the titanium alloy on the surface of the initial structural member 11 is not corroded by the acid and presents a polished effect. The polished effect and the matte effect form a Damascus pattern on the surface of the initial structural member 11;

[0047] Among them, when using different types of stainless steel profiles m2, different types of acids are used during pickling treatment; in other words, the type of acid used during pickling treatment needs to match the stainless steel, and of course also match the titanium alloy, so that the acid can corrode the stainless steel without corroding the titanium alloy, thereby making the stainless steel present a matte effect and the titanium alloy present a polished effect. For example, when using SUS304 stainless steel profile m2, the acid used can be hydrochloric acid; when using SUS316 stainless steel profile m2, the acid used can be a mixed solution of hydrochloric acid and ferric chloride. Since titanium alloy can be corroded by HF but not by hydrochloric acid or the mixed solution of hydrochloric acid and ferric chloride, the titanium alloy will not be corroded when the stainless steel is corroded, so that the titanium alloy can present a polished effect.

[0048] It should be understood that when using zirconium alloy profile and stainless steel profile m2, the acid selected is not limited to hydrochloric acid, and can be other types of acids or mixed solutions of acids, as long as it can corrode the stainless steel without corroding the zirconium alloy, and no specific limitation is made here.

[0049] Step S4. As shown in (g) and (h) Figure 5 , a chromium carbide film is formed on the surface of the initial structural member 11 using, but not limited to, a coating machine and chromium carbide. This chromium carbide film can serve as the protective film 12 to protect the initial structural member 11, thereby obtaining a metal structural member.

[0050] In this way, by using the titanium alloy profile m1 and the stainless steel profile m2 to make the metal structural member, not only can the Damascus pattern be presented, but also the lightweight design of the metal structural member can be achieved, and the wear and scratch resistance of the metal structural member can be improved, and the reliability of the metal structural member can be enhanced.

[0051] Moreover, due to the use of the folding forging process when forming the plate, the finally presented Damascus pattern is random, uncontrollable, and non-repeatable, so that the presented Damascus pattern has uniqueness and exclusivity.

[0052] Figure 6 Exemplarily shows a schematic diagram of the manufacturing method of the metal structural member in the embodiment provided by the present application. Referring to Figure 6 shown, this manufacturing method is basically similar to the manufacturing method in the foregoing Figure 5 shown embodiment, the difference being: the method of forming the plate is different. Exemplarily, step S1 in the foregoing Figure 5 shown embodiment can be adjusted to: As shown in (a) Figure 6 , a groove m4 is made on the surface of the titanium alloy profile m1 using, but not limited to, the titanium alloy profile m1; using, but not limited to, the stainless steel powder m2', the stainless steel powder m2' is filled into the groove m4 and sintered to obtain a plate m3.

[0053] Since the stainless steel powder m2' is filled in the groove m4, the position of the stainless steel in the plate m3 is thus defined. When pickling treatment is carried out, if the stainless steel is corroded by acid to present a matte effect and the titanium alloy is not corroded by acid to present a polished effect, then the position where the matte effect is located corresponds to the filling position of the stainless steel powder m2', and thus corresponds to the setting position of the groove m4. Therefore, through this manufacturing method, a Damascus pattern can be made according to the design requirements. In other words, by setting parameters such as the setting position, the number of settings, and the shape of the groove m4 of the groove m4, the pre-designed Damascus pattern can be presented on the surface of the metal structural member, so that different metal structural members can have the same Damascus pattern on the surface, realizing the mass production of metal structural members with the same Damascus pattern, making this manufacturing method have good practicability and repeatability.

[0054] Moreover, since the stainless steel powder m2' is filled in the groove m4 of the titanium alloy plate m3 to form the plate m3, the thickness of the plate m3 can be controlled, so that an ultra-thin plate m3 can be produced, and then an ultra-thin metal structure can be produced. On the basis of further reducing the weight of the metal structure, the design requirements of the ultra-thin housing in electronic devices can be met.

[0055] It should be understood that the manufacturing method in this embodiment is similar to the manufacturing method of the metal structure in the foregoing Figure 5 shown embodiment. For the relevant introduction in the foregoing Figure 5 shown embodiment, reference can be made to the relevant introduction in the foregoing embodiment, and the repeated parts will not be elaborated.

[0056] In summary, in the embodiments of the present application, the metal structure combines the first metal and the second metal through folding forging treatment or sintering treatment, and through processing, polishing, and pickling treatments, the first metal with higher corrosion resistance does not corrode during the pickling process and presents a polished effect, and the second metal with lower corrosion resistance corrodes during the pickling process and presents a matte effect, thereby forming a metal structure with a Damascus pattern. And because the density of the first metal is less than the density of the second metal, the density of the metal structure can be reduced, and by adjusting the mass ratio of the first metal and the second metal, the density of the metal structure can be adjusted, so that the lightweight design of the metal structure can be realized. In addition, a protective film can be formed on the first metal and the second metal through a coating process to increase the wear and scratch resistance of the metal structure, thereby improving the reliability of the metal structure.

[0057] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. A metal structural member with a Damascus pattern, characterized in that Comprising: A first metal and a second metal, wherein the density of the first metal is less than that of the second metal, and the corrosion resistance of the first metal is greater than that of the second metal. On the surface of the metal structural member, the first metal presents a polished effect, and the second metal presents a matte effect, so that a Damascus pattern is formed on the surface of the metal structural member.

2. The metal structural member according to claim 1, wherein The production material of the first metal includes: titanium alloy or zirconium alloy.

3. The metal structural member according to claim 1 or 2, characterized in that, The production material of the second metal includes stainless steel.

4. The metal structural member according to any one of claims 1-3, characterized in that The production material of the first metal includes TC4 titanium alloy or TA1 titanium alloy, and the production material of the second metal includes SUS304 stainless steel or SUS316 stainless steel.

5. The metal structural member according to any one of claims 2-4, characterized in that, The density of the metal structure is 4.8 g / cm 3 Up to 7g / cm 3 .

6. The metal structural member according to any one of claims 1-5, characterized in that There is a transition layer between the first metal and the second metal.

7. The metal structural member according to any one of claims 1-6, characterized in that, The metal structural member further includes a protective film, and the protective film covers the first metal and the second metal.

8. The metal structural member according to claim 7, characterized in that, Pigments are provided in the protective film.

9. A manufacturing method of a metal structural member, characterized in that, Comprising: Forming a sheet including a first metal and a second metal; wherein, the density of the first metal is less than that of the second metal, and the corrosion resistance of the first metal is greater than that of the second metal; Performing a polishing treatment and a pickling treatment on the formed structure, so that the second metal on the surface of the formed structure is corroded by acid to present a matte effect, and the first metal on the surface of the formed structure is not corroded by acid to present a polished effect, forming a Damascus pattern, and obtaining the metal structural member.

10. The method according to claim 9, characterized in that, The manufacturing method of a sheet including a first metal and a second metal includes: Performing a folding forging treatment on a profile including the first metal and a profile including the second metal to obtain the sheet.

11. The method according to claim 9, wherein The manufacturing method of a sheet including a first metal and a second metal includes: Making a groove on the surface of a profile including the first metal; Adding the powder of the second metal into the groove and performing a sintering treatment to obtain the sheet.

12. The method according to any one of claims 9-11, characterized in that, Further comprising: Before obtaining the metal structural member, and after performing the polishing treatment and the pickling treatment on the formed structure, forming a protective film on the surface of the formed structure.

13. An electronic device, characterized in that, Comprising: The metal structural member according to any one of claims 1-8.

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