TW202041294A - Ultra-thin titanium sheet and method for producing the same - Google Patents

Abstract

The present invention relates to an ultra-thin titanium sheet and a method for producing the same. A titanium plate stack and two titanium guide blocks are provided, and the titanium plate stack is disposed between the two titanium guide blocks. Next, an interface between the titanium plate stack and each of the titanium guide blocks is subjected to a welding process to form a composite titanium slab. Then, a hot rolling process is performed to the composite titanium slab to form a hot-rolling composite titanium plate. After the titanium guide blocks of the hot-rolling composite titanium plate are removed, the ultra-thin titanium sheets of the present invention are obtained. Each of the ultra-thin titanium sheets has a thickness thinner than or equal to 6 mm and an excellent mechanical property.

Description

Ultra-thin titanium plate and manufacturing method thereof

The present invention relates to a titanium plate, in particular to provide an extremely thin titanium plate with good mechanical properties.

Titanium alloy has the advantages of high specific strength, good corrosion resistance and non-magnetic properties, so it is widely used in industry and aerospace fields. With the diversification of back-end applications, the size requirements of titanium alloy plates are becoming more and more diverse. Among them, the demand for extremely thin titanium plates is more significant. The reason is that the common titanium alloy (Ti-6Al-4V) has high deformation resistance at low temperature. Therefore, after the hot rolling process is cooled, the ultra-thin titanium plate has poor ductility, which makes it unwinding. In the process of flattening, the titanium belt is prone to severe brittle fracture damage, and it is impossible to effectively produce extremely thin titanium plates. Furthermore, when the thickness of the titanium plate is reduced, its deformation resistance also increases, and it is difficult to further thin the titanium plate, so it is impossible to effectively produce an extremely thin titanium plate with a thickness that meets the demand.

In order to solve the aforementioned defect that it is difficult to further reduce the thickness of the titanium plate, the prior art is to place a thin titanium plate between two carbon steel plates to make ultra-thin titanium plates by carbon steel wrap rolling. Among them, the rolls of the hot rolling process exert force on the carbon steel plates, thereby thinning the thin titanium sheets wrapped between the carbon steel plates.

However, with the progress of the hot rolling process, the heat generated by the deformation of the carbon steel plate and the thin titanium plate tends to accumulate in the thin titanium plate at the core. The heat transfer coefficient of titanium alloy is lower, and the heat storage effect is doubled, thereby increasing the titanium The temperature of the thin plate softens or liquefies, or the thin titanium plate penetrates through the carbon steel plate, causing rolling failure. Secondly, when the rolling force is applied by the rolls of the hot rolling process, the softened titanium plate is prone to slip and rheology, resulting in uneven rolling, which in turn leads to serious wrinkle defects on the surface of the carbon steel plate.

In addition, when the aforementioned wrapped rolling delay is performed on an automated production line, since the aforementioned heat storage effect is not easy to control, the automated production line cannot effectively use the rolling speed to control the temperature uniformity of the thin titanium plate, and it is difficult to avoid the thin titanium plate. The heart heats up after the rolling delay. Accordingly, the prior art wrap rolling cannot effectively produce extremely thin titanium plates.

In view of this, it is urgent to provide an ultra-thin titanium plate and a manufacturing method thereof, so as to improve the defects of conventionally difficult to manufacture ultra-thin titanium plates.

Therefore, one aspect of the present invention is to provide a method for manufacturing ultra-thin titanium plates. This method uses titanium guide blocks to constrain the titanium plates of the titanium stack, and the ultra-thin titanium plates can be manufactured by a hot rolling process. sheet.

Another aspect of the present invention is to provide an ultra-thin titanium plate, which is manufactured by the aforementioned manufacturing method.

According to one aspect of the present invention, a method for manufacturing ultra-thin titanium plates is proposed. This manufacturing method first provides a stack of titanium plates and two titanium guide blocks. The titanium plate stack includes a plurality of titanium plates, and the titanium plates are along a hot rolling process. The rolling force is applied in the direction of stacking, and along the rolling direction of the hot rolling process, the titanium plate stacking system is located between these titanium guide blocks. Then, a welding process is performed on the interface between the titanium plate stack and each titanium guide block to form a composite titanium blank. Then, a hot rolling process is performed on the composite titanium blank to form a hot-rolled composite titanium plate. After that, the titanium guide block of the hot-rolled composite titanium plate is removed to obtain an extremely thin titanium plate.

According to an embodiment of the present invention, the material of each of the aforementioned titanium guide blocks can independently be pure titanium with a strength of at least Gr.2 or a titanium alloy with a strength of Gr.5.

According to another embodiment of the present invention, the aforementioned welding process is to first perform a grooving step on each titanium guide block to form a plurality of grooves. Then, a filling step is performed on each groove to weld and adhere the titanium plate stack and each titanium guide block.

According to another embodiment of the present invention, before performing the aforementioned welding process, this manufacturing method can perform an isolation process for each adjacent two of the titanium plates in the titanium plate stack.

According to another embodiment of the present invention, the aforementioned isolation process is to form an isolation film between each adjacent two of the titanium plates.

According to yet another embodiment of the present invention, the rolling ratio of each pass of the aforementioned hot rolling process is not more than 25%.

According to still another embodiment of the present invention, after removing the aforementioned titanium guide block, this manufacturing method can perform a flattening annealing process on at least one of the ultra-thin titanium plates.

According to still another embodiment of the present invention, the annealing temperature of the aforementioned leveling annealing process is 650°C to 800°C.

According to still another embodiment of the present invention, the aforementioned leveling annealing process is performed by placing at least one of the ultra-thin titanium plates between two steel plates, and the temperature holding time of the leveling annealing process (t _h ) As shown in the following formula (I):

t _t =[(T _S ×1.5)+(T _T ×1)]×1 minute (I-1)

Wherein, t _t represents the thickness factor time, and is shown in formula (I-1); T _S represents the total thickness of the steel plate; and T _T represents the total thickness of at least one of the ultra-thin titanium plates.

According to another aspect of the present invention, an ultra-thin titanium plate is provided, which is produced by the aforementioned manufacturing method, and the thickness of the ultra-thin titanium plate is not greater than 6 mm.

Applying the ultra-thin titanium plate and the manufacturing method of the present invention, two titanium guide blocks are used to constrain the titanium stack, and the ultra-thin titanium plate with a thickness of not more than 6 mm can be produced by a hot rolling process. Among them, during the hot rolling process, the specific rolling ratio per pass can effectively avoid the diffusion and bonding of the titanium plates of the titanium stack due to the heat generated by the rolling deformation, so the poles produced by the hot rolling process can be easily separated Thin titanium plates. In addition, with the specific rolling parameters of the hot rolling process, the differential structure can be implanted and destroyed the long-axis grain structure of the titanium plate, and the differential structure can be rearranged in the further leveling annealing process, and then the production Obtained a fine equiaxed α-phase grain structure.

100‧‧‧Method

110/120/130/140/150‧‧‧Operation

200‧‧‧Composite titanium blank

200a/200b‧‧‧direction

210‧‧‧Titanium plate stack

211‧‧‧Titanium Plate

220‧‧‧Titanium guide block

220a‧‧‧Welding Department

θ‧‧‧angle

In order to have a more complete understanding of the embodiments of the present invention and its advantages, please refer to the following description and the corresponding drawings. Must be emphasized Yes, the various features are not drawn to scale and are for illustration purposes only. The contents of the related drawings are described as follows: [FIG. 1] is a schematic flow diagram of a method for manufacturing an ultra-thin titanium plate according to an embodiment of the present invention.

[FIG. 2A] is a three-dimensional schematic diagram of composite titanium blanks according to some embodiments of the present invention.

[Figure 2B] is a schematic side view of a composite titanium blank according to some embodiments of the present invention.

[Fig. 3] is an optical microscope photograph of a titanium plate after an isolation process according to some embodiments of the present invention.

[Figure 4] is a photo showing the metallographic structure of the ultra-thin titanium plate prepared in accordance with an embodiment of the present invention.

The manufacture and use of the embodiments of the present invention are discussed in detail below. However, it is understandable that the embodiments provide many applicable inventive concepts, which can be implemented in various specific contents. The specific embodiments discussed are for illustration only, and are not intended to limit the scope of the invention.

The "thickness" referred to in the present invention refers to the dimension of the plate measured parallel to the direction in which the rolling force is applied in the hot rolling process.

Please refer to Figure 1, Figure 2A and Figure 2B, in which Figure 1 is a schematic flow diagram of a method for manufacturing an ultra-thin titanium plate according to an embodiment of the present invention, and Figure 2A is a schematic view of some embodiments according to the present invention Standing of composite titanium blank 2B is a schematic side view of a composite titanium blank according to some embodiments of the present invention.

In the method 100, the titanium plate stack 210 and the two titanium guide blocks 220 are provided first, and the interface between the titanium plate stack 210 and each titanium guide block 220 is welded to form the composite titanium blank 200, as in operation 110 and operation 120 are shown. The titanium plate stack 210 includes a plurality of titanium plates 211, and these titanium plates 211 are stacked along the rolling force application direction 200a of the subsequent hot rolling process. Secondly, along the rolling direction 200b of the hot rolling process, the titanium plate stack 210 is located between the two titanium guide blocks 220, where the rolling direction 200b means that the composite titanium blank 200 enters between the rolls of the hot rolling process to The direction of the hot rolling process.

In some embodiments, the main component of the titanium plate 211 may be Ti-6Al-4V, and the remaining part is unavoidable impurities. In some embodiments, the material of each titanium guide block 220 can be pure titanium (with a strength of at least Gr.2) or a titanium alloy (with a strength of Gr.5) independently, and can be combined with the titanium plate 211 of the titanium stack 210 With a small difference in deformation resistance, the composite titanium blank 200 can be prevented from cracking during the hot rolling process. Preferably, the material of the titanium guide block 220 has good welding properties.

In some specific examples, the thickness of the titanium guide block 220 can be 90 mm to 190 mm, and the thickness of each titanium plate 211 can be 5 mm to 90 mm, and the maximum stack thickness of the titanium plate 211 (ie The maximum thickness of the titanium plate stack 210) is 190 mm. It is understandable that the maximum stack thickness of the titanium plate 211 is the maximum thickness of the titanium guide block 220. Preferably, in order to facilitate the rolling of the rolls in the subsequent hot rolling process, the thickness of the titanium guide block 220 is equal to that of the titanium plate stack 210 thickness. In other words, the operator can first stack the titanium plates 211 to form the titanium plate stack 210. Then, according to the thickness of the titanium plate stack 210 formed, a titanium guide block 220 with a matching thickness is selected.

In some embodiments, during the welding process, at a position adjacent to the titanium plate stack 210, each titanium guide block 220 may first undergo a grooving step to form a plurality of grooves in the titanium plate stack 210 Between the titanium guide blocks 220 on both sides. Then, a filling step is performed to fill each groove, and the titanium plate stack 210 and each titanium guide block 220 can be welded and bonded to form the composite titanium plate 200. Among them, the grooving processing step can be K groove processing, V groove processing or other suitable grooving processing steps. Compared with K-groove processing, V-grooving tends to cause residual stress, and it is easy to cause the composite titanium blank to deform more than 3 mm after the hot rolling process, so the grooving step is preferably K-groove processing . Among them, in order to ensure that the composite titanium blank has a deformation of no more than 3 mm after the welding process, the groove formed by the K groove processing is symmetrical up and down. In other words, a virtual plane passing through the center of the composite titanium blank 200 and perpendicular to the application direction 200 a is the symmetry plane of the composite titanium blank 200. For example, in some specific examples, the processing angle θ of the K-groove processing may be 45° to 60°. When the processing angle θ is 45° to 60°, the filling amount of subsequent solder can be effectively saved, and the electrode can easily penetrate into the groove to ensure that the groove is completely filled.

The aforementioned filler step is to fill the grooves with solder to form a plurality of welding portions 220a, and the titanium plate stack 210 and each titanium guide block 220 can be welded and bonded. In some specific examples, the filling step can be performed by an automatic welding method of molten electrode inert gas welding (MIG). In these specific examples, the MIG welding method The current can be set from 130 amperes to 260 amperes, the voltage can be from 20 volts to 26 volts, the shielding gas can be argon, and the flow rate of the shielding gas can be 20l/min to 30l/min.

After welding and bonding the titanium stack 210 and the titanium guide block 220, the formed composite titanium blank 200 is subjected to a hot rolling process to form a hot-rolled composite titanium blank, as shown in operation 130. When the hot rolling process is performed, the composite titanium blank 200 is first heated to 900°C to 1000°C, so that the composite titanium blank 200 is hot rolled in the two-phase region (α phase and β phase). The rolling reduction ratio of more than 25% is arranged in the long axis grain structure of the titanium plate 211.

Secondly, when the reduction and rolling ratio of each pass is not more than 25%, the heat generated by rolling is not easy to accumulate in the center of the titanium plate stack 210, and it is not easy to cause the titanium plate 211 to reheat, thereby avoiding the titanium plate stack The temperature of the center of 210 increases, so it can prevent the surface of the titanium plate 211 from cooling to form a Federman structure (non-equiaxial structure) after the hot rolling process.

In some specific examples, in order to ensure that the composite titanium blank 200 has a uniform internal temperature, the heating and holding time of the composite titanium blank 200 may be [blank thickness (mm) * 1.5 minutes] ± 30 minutes. In addition, the rolling temperature of the hot rolling process can be 650°C to 900°C, and the president reduction rolling ratio can be 50% to 120%.

When the hot rolling process is performed, each titanium plate 211 in the titanium plate stack 210 preferably has the same material and thickness. When each titanium plate 211 has the same material and thickness, each titanium plate 211 can have the same deformation resistance, and it is easier to reach a consistent deformation amount, and thus an extremely thin titanium plate can be produced.

In some embodiments, before performing the aforementioned welding process, each adjacent two of the titanium plates 211 of the titanium plate stack 210 can be isolated The process is to avoid the diffusion bonding of the titanium plate 211 during the high-temperature hot rolling process. In these embodiments, the isolation process may include, but is not limited to, forming an isolation film between each two adjacent titanium plates 211, other appropriate isolation methods, or any combination of the foregoing methods. In some specific examples, the isolation film can be formed by coating a spacer between each two adjacent titanium plates 211, or performing an oxidation step on each titanium plate. In these specific examples, the aforementioned release agent may include, but is not limited to, liquid glass powder, antioxidants, other suitable release agents, or any combination of the above materials. Secondly, the aforementioned oxidation step of the titanium plate 211 can be performed by heating the titanium plate 211 to form an oxide film on the surface of the titanium plate 211. For example, the titanium plate 211 can be placed in a heating furnace with a temperature of 450° C., and the temperature holding time is [the thickness of the titanium plate 211 (mm) * 1.5 minutes]. As shown in FIG. 3, the surface of the heated titanium plate 211 has an oxide film with a thickness of 79 μm, which can effectively avoid the diffusion bonding of the titanium plate 211.

In some embodiments, the composite titanium blanks of the present invention (for ease of understanding, hereinafter referred to as composite titanium blanks) can also be composed of a plurality of composite titanium blanks 200 as shown in FIG. 2A, and these composite titanium blanks 200 are Stacked along the rolling force application direction 200a, the adjacent titanium guide blocks 220 are welded to each other, so that the composite titanium blanks 200 are combined into a composite titanium blank. Similarly, in order to avoid excessive deformation of the combined titanium blank after welding, the combined titanium blank must have a symmetrical structure. For example, in the case that the combined titanium blank system is composed of two composite titanium blanks 200, the titanium guide block 220 of the upper composite titanium blank 200 and the titanium guide block 220 of the lower composite titanium blank 200 must be welded. And the interface of the two composite titanium blanks 200 is a symmetry plane. In other words, the upper composite titanium blank 200 and the lower composite titanium blank 200 are symmetrical to each other. It should be noted that the titanium of the combined titanium blank The guide blocks 220 must have good welding strength to avoid the rolling force applied during the hot rolling process that causes the titanium guide blocks 220 to break apart from the weld at the interface, which may cause the titanium plates 211 of the titanium plate stack 210 to collapse solution.

Please continue to refer to Figure 1. After the hot rolling process, the titanium guide block of the hot-rolled composite titanium plate is removed to obtain the ultra-thin titanium plate of the present invention, as shown in operation 140 and operation 150. Among them, in the present invention, by stacking a plurality of titanium plates, the binding force of the titanium guide block and the specific rolling ratio of the hot rolling process, the ultra-thin titanium plate produced has a thickness of not more than 6 mm.

In some specific cases, due to the extremely thin thickness of the ultra-thin titanium plate, after the hot rolling process and the restriction of the titanium guide block are removed, the deformation resistance of the ultra-thin titanium plate will be released, and the extremely thin titanium plate The overall rebound thickness of the stack of sheets is increased by approximately 2.5 mm. Accordingly, in these specific examples, the thickness (mm) of each ultra-thin titanium plate produced is approximately [(setting thickness+2.5)/N]. Among them, the set thickness is the thickness calculated based on the total rolling ratio of the hot rolling process, and N represents the number of titanium plates in the titanium plate stack.

In some embodiments, if the titanium plate has been subjected to an isolation process, after removing the titanium guide block, the isolation layer formed by the isolating agent or the oxide layer formed by the oxidation step will help the separation of the ultra-thin titanium plate. The step of cutting and separating can be avoided. Secondly, based on the requirements of back-end applications, the isolation layer or oxide layer on the surface of the ultra-thin titanium plate can be selectively removed by sandblasting and/or pickling steps. It is understandable that, in other embodiments, if the titanium plate is not subjected to the isolation process, since the rolling ratio of each pass in the aforementioned hot rolling process is not greater than 25%, the titanium plates of the titanium stack are not easy to form diffusion bonding. Accordingly, after removing the titanium guide block, the extremely thin titanium plates can still be easily separated.

In some embodiments, since the produced ultra-thin titanium plate has a deformation of no more than 3 mm, the produced ultra-thin titanium plate can optionally be further subjected to a leveling annealing process to eliminate this The amount of deformation. In some embodiments, the leveling annealing process can be performed by gravity leveling or other appropriate methods. Secondly, when the annealing and leveling process is carried out, by the annealing temperature and the leveling force (for example: gravity applied by gravity leveling), the difference in the long axis grain structure of the ultra-thin titanium plate can be rearranged , So that the flat long-axis grain structure is spheroidized and refined to form an equiaxed fine α-phase grain structure, so it has good mechanical properties.

For example, the leveling annealing process of gravity leveling can be carried out with a steel plate with a thickness of 25 mm to 65 mm above and a steel plate with a thickness of 25 mm to 30 mm below, and one or more thin titanium plates The sheet is arranged between the upper steel plate and the lower steel plate, and the ultra-thin titanium sheet or sheets can be leveled by gravity. In some specific examples, the leveling annealing process of gravity leveling is performed at an annealing temperature of 650°C to 800°C. In these specific examples, the holding time (t _h ) is shown in the following formula (I):

t _t =[(T _S ×1.5)+(T _T ×1)]×1 minute (I-1)

Among them, t _t represents the thickness factor time, as shown in formula (I-1); T _S represents the total thickness of the upper steel plate and the lower steel plate; and T _T represents the total thickness of the extremely thin titanium plate clamped by the upper and lower steel plates .

In this way, the small deformation caused by the hot rolling process can be effectively eliminated, and an extremely thin titanium plate with extremely thin thickness and good mechanical properties and flatness can be obtained.

When the temperature holding time of the flattening annealing process satisfies the formula (I), the produced ultra-thin titanium plate can have good flatness and mechanical properties. However, it is understandable that if the temperature is held for too long, although the ultra-thin titanium plate can have better flatness, it will be too soft and reduce the mechanical strength.

In some application examples, the method for manufacturing ultra-thin titanium plates of the present invention can produce ultra-thin titanium plates with a thickness of not more than 6 mm by the restraint force of the titanium guide block and the rolling force of the hot rolling process, and After removing the titanium guide block, the titanium plates of the titanium stack can be easily separated without the need for additional cutting and separation processes. Secondly, by the rolling ratio of the hot rolling process, the difference row can be implanted into the long-axis grain structure of the titanium plate, and the difference row can be rearranged by the annealing and flattening process to form spheroidization and refinement , And form an equiaxed fine α-phase grain structure.

The following examples are used to illustrate the application of the present invention, but they are not intended to limit the present invention. Anyone who is familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention.

First, according to the foregoing description, stack a plurality of titanium plates, and weld the stacked titanium stack of the titanium plates and two titanium guide blocks by K groove processing and MIG welding to form the composite titanium blank of the embodiment, wherein each The surface of a piece of titanium plate is coated with antioxidant, the titanium stacking system is arranged between the titanium guide blocks, and the angle of K groove processing is 45°. Then, the composite titanium blank is subjected to a hot rolling process, wherein the furnace entry temperature of the composite titanium blank is 900°C to 1000°C, the rolling temperature is 650°C to 900°C, the rolling ratio of each pass is not more than 25%, and the total The rolling ratio is 50% to 120%.

After the hot rolling process, the titanium guide block of the hot-rolled composite titanium blank is removed, and each ultra-thin titanium plate is flattened and annealed to obtain a solid Examples of extremely thin titanium plates. Among them, the annealing temperature is 650°C to 800°C, the thickness of the upper steel plate is 25 mm to 65 mm, the thickness of the lower steel plate is 25 mm to 30 mm, and the temperature holding time is as shown in the aforementioned formula (I) .

Please refer to FIG. 4, which shows a photo of the metallographic structure of the ultra-thin titanium plate prepared in accordance with an embodiment of the present invention, where the scale bar represents 20 μm. As shown in Fig. 4, the ultra-thin titanium plate prepared in the embodiment has a fine equiaxed α-phase structure. According to this, in the direction perpendicular to the rolling direction of the hot rolling process (ie T-direction (Transverse Direction)), the produced ultra-thin titanium plate has a yield strength (Yield Strength; YS) of 956 MPa and a resistance of 1052 MPa. Tensile Strength (TS) and 12.4% elongation (Elongation; EL); ultra-thin titanium produced in the direction parallel to the rolling direction of the hot rolling process (ie L direction (Longitudinal Direction)) The plate has a yield strength of 849MPa, a tensile strength of 943MPa and an elongation of 12.2%.

Accordingly, the manufacturing method of the ultra-thin titanium plate of the present invention uses the titanium guide block to provide a restraining force to limit the titanium plate, and the ultra-thin titanium plate with a thickness of not more than 6 mm can be produced by a hot rolling process . Secondly, by isolating the titanium plates of the titanium stack, during the hot rolling process, the titanium plates are not easily diffused and joined due to the heat generated by the rolling deformation, and after removing the titanium guide block, the formed pole Thin titanium plates can be easily separated, so no additional cutting and separation processes are required. Furthermore, in the hot rolling process, with the specific rolling ratio of each pass, the differential structure can be implanted into the long-axis grain structure of the titanium plate, and the ultra-thin titanium plate can be further adjusted. The flat annealing process uses the annealing temperature of the annealing process and the force applied by the leveling process to rearrange the difference rows and spheroidize the grain structure to form etc. The fine a-phase structure of the shaft improves the mechanical properties of the ultra-thin titanium plate.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Retouching, therefore, the scope of protection of the present invention shall be subject to the scope of the attached patent application.

100‧‧‧Method

110/120/130/140/150‧‧‧Operation

Claims (10)

A method for manufacturing ultra-thin titanium plates includes: providing a titanium plate stack and two titanium guide blocks, wherein the titanium plate stack includes a plurality of titanium plates, and the titanium plates are along one of the hot rolling processes A rolling force is applied in one direction of stacking, and along a rolling direction of the hot rolling process, the titanium plate stack system is located between the titanium guide blocks; the titanium plate stack and each of the titanium guide blocks A welding process is performed on an interface to form a composite titanium blank; the hot rolling process is performed on the composite titanium blank to form a hot-rolled composite titanium plate; and the titanium guide blocks of the hot-rolled composite titanium plate are removed , To obtain these extremely thin titanium plates. As for the manufacturing method of the ultra-thin titanium plate described in the first item of the patent application, one of the materials of each of the titanium guide blocks is independently a pure titanium with a strength of at least Gr.2 or a strength of Gr.5. Of titanium alloy. The manufacturing method of the ultra-thin titanium plate as described in the first item of the patent application, wherein the welding process includes: performing a grooving process on each of the titanium guide blocks to form a plurality of grooves; and A filling step is performed on the grooves to weld the titanium plate stack and each of the titanium guide blocks. The manufacturing method of the ultra-thin titanium plate as described in item 1 of the scope of the patent application, before performing the welding process, further includes: performing a process on each adjacent two of the titanium plates in the titanium plate stack Isolation process. According to the manufacturing method of the ultra-thin titanium plate described in item 4 of the scope of patent application, the isolation process includes: forming an isolation film between each adjacent two of the titanium plates. As for the method of manufacturing the ultra-thin titanium plate described in the first item of the scope of patent application, the rolling ratio of each pass of the hot rolling process is not more than 25%. For example, the method for manufacturing the ultra-thin titanium plate described in item 1 of the scope of patent application, after removing the titanium guide blocks, further includes: performing a leveling annealing process on at least one of the ultra-thin titanium plates . According to the manufacturing method of the ultra-thin titanium plate described in item 7 of the scope of patent application, the annealing temperature of one of the flattening annealing processes is 650°C to 800°C. The manufacturing method of the ultra-thin titanium plate as described in item 8 of the scope of patent application, wherein the leveling and annealing process is performed by arranging the at least one of the ultra-thin titanium plates between two steel plates, and The temperature holding time (t _h ) of one of the leveling annealing processes is shown in the following formula (I):

t _t =[(T _S ×1.5)+(T _T ×1)]×1 minute (I-1) where t _t represents the thickness factor time and is shown in formula (I-1); T _S represents the The total thickness of one of the steel plates; and T _T represents the total thickness of the at least one of the ultra-thin titanium plates. An ultra-thin titanium plate manufactured by the manufacturing method described in any one of items 1 to 9 in the scope of the patent application, wherein one of the ultra-thin titanium plates is not more than 6 mm thick.

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