High-flatness and high-heat-conductivity titanium-aluminum composite plate, forming process and heat treatment device

Abstract

The invention aims at disclosing a high-flatness and high-heat-conductivity titanium-aluminum composite plate, a forming process and a heat treatment device, and relates to the technical field of titanium-aluminum composites.The high-flatness and high-heat-conductivity titanium-aluminum composite plate is formed by compositing a TC4 alloy titanium plate with the first thickness and a high-strength aluminum plate with the second thickness; the first thickness accounts for 12%-50% of the total thickness of the composite board, and the total thickness of the composite board is 2.0 mm-7. 5mm; the TC4 alloy titanium plate comprises the following components in percentage by weight: 86 to 89 percent of titanium, 5.5 to 6.8 percent of aluminum and 3.5 to 4.5 percent of vanadium; the high-strength aluminum plate comprises 0.4 wt%-0.8 wt% of silicon, 0.7 wt% of iron, 0.15 wt%-0.4 wt% of copper, 0.15 wt% of manganese, 0.8 wt%-1.2 wt% of magnesium, 0.04 wt%-0.35 wt% of chromium, 0.25 wt% of zinc, 0.15 wt% of titanium and aluminum, and the titanium-aluminum composite plate has the beneficial effects that the thickness of the TC4 alloy titanium plate in the titanium-aluminum composite plate accounts for 12%-50% of the total thickness, that is, the titanium-aluminum composite plate is mainly the high-strength aluminum plate, and due to the fact that the high-strength aluminum plate is lower in density and lower in cost, the titanium-aluminum composite plate can be used for manufacturing the high-strength aluminum plate; the titanium-aluminum composite plate has the advantage in the aspect of cost performance; and clamping a plurality of staggered-surface laminated plates between the first counterweight plate and the second counterweight plate, and carrying out heat treatment to enable the flatness of the composite plate to be 0.5-1mm, so that the composite plate can be used for preparing the high-throughput operation cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of titanium-aluminum composite materials, and particularly to a high-flatness and high-thermal-conductivity titanium-aluminum composite plate, a forming process and a heat treatment device. Background Art

[0002] Titanium-aluminum composite materials have the characteristics of high strength, light weight, wear resistance, corrosion resistance and excellent thermal conductivity, and have significant advantages and good application prospects in the heat dissipation of artificial intelligence and high-throughput computing cabinets. Given that the thermal expansion coefficient of titanium is much smaller than that of aluminum, after thermal composite of titanium and aluminum, due to the large difference in the degree of expansion and contraction, the titanium-aluminum composite plate will bring serious warping, which restricts the application and popularization of the titanium-aluminum composite plate.

[0003] In view of this, it is necessary to develop a high-flatness and high-thermal-conductivity titanium-aluminum composite plate, a forming process and a heat treatment device. Summary of the Invention

[0004] The purpose of the present invention is to disclose a high-flatness and high-thermal-conductivity titanium-aluminum composite plate, a forming process and a heat treatment device.

[0005] The first object of the present invention is to provide a high-flatness and high-thermal-conductivity titanium-aluminum composite plate.

[0006] The second object of the present invention is to provide a forming process for a high-flatness and high-thermal-conductivity titanium-aluminum composite plate.

[0007] The third object of the present invention is to provide a heat treatment device for a high-flatness and high-thermal-conductivity titanium-aluminum composite plate.

[0008] To achieve the above first object of the invention, the present invention provides a high-flatness and high-thermal-conductivity titanium-aluminum composite plate, which is composed of a TC4 alloy titanium plate with a first thickness and a high-strength aluminum plate with a second thickness;

[0009] The proportion of the first thickness in the total thickness of the composite plate is 12%-50%, and the total thickness of the composite plate is 2.0 mm - 7.5 mm;

[0010] The composition of the TC4 alloy titanium plate includes titanium: 86 wt% - 89 wt%, aluminum: 5.5 wt% - 6.8 wt%, vanadium: 3.5 wt% - 4.5 wt%;

[0011] The composition of the high-strength aluminum plate is silicon: 0.4 wt% - 0.8 wt%, iron: 0.7 wt%, copper: 0.15 wt% - 0.4 wt%, manganese: 0.15 wt%, magnesium: 0.8 wt% - 1.2 wt%, chromium: 0.04 wt% - 0.35 wt%, zinc: 0.25 wt%, titanium: 0.15 wt% and aluminum.

[0012] Based on the same inventive principle, to achieve the above-mentioned second object of the invention, the present invention provides a forming process for a high flatness and high thermal conductivity titanium-aluminum composite plate, comprising the following steps:

[0013] S1: Prepare a composite plate by thermally compounding a TC4 alloy titanium plate with a first thickness and a high-strength aluminum plate with a second thickness;

[0014] S2: Cut the composite plate into a number of plates of the same size according to the set dimensions;

[0015] S3: Stack 30 to 50 staggered-layer plates between a first counterweight plate and a second counterweight plate, and lock the first counterweight plate and the second counterweight plate together with bolts;

[0016] S4: Place the first counterweight plate and the second counterweight plate in a box-type heating furnace for heat treatment;

[0017] S5: After the first counterweight plate and the second counterweight plate are cooled, unlock them and take out the composite plate with a warpage of 0.5 mm - 1 mm.

[0018] Preferably, the composition of the TC4 alloy titanium plate includes titanium: 86 wt% - 89 wt%, aluminum: 5.5 wt% - 6.8 wt%, vanadium: 3.5 wt% - 4.5 wt%.

[0019] Preferably, the composition of the high-strength aluminum plate is silicon: 0.4 wt% - 0.8 wt%, iron: 0.7 wt%, copper: 0.15 wt% - 0.4 wt%, manganese: 0.15 wt%, magnesium: 0.8 wt% - 1.2 wt%, chromium: 0.04 wt% - 0.35 wt%, zinc: 0.25 wt%, titanium: 0.15 wt% and aluminum.

[0020] Preferably, the proportion of the first thickness in the total thickness of the composite plate is 12% - 50%, and the total thickness of the composite plate is 2.0 mm - 7.5 mm.

[0021] Preferably, in step S3, the staggered-layer plates are composed of a first plate and a second plate. The first plate is placed flat with the aluminum side facing up, and the second plate is placed between two adjacent first plates with the aluminum side facing down.

[0022] Preferably, in step S4, the heat treatment process is as follows:

[0023] S41: Apply a pressure of 10 kg / mm 2 -15 kg / mm 2 to the second counterweight plate at a vertically downward angle;

[0024] S42: Evacuate the box-type heating furnace to -0.08 Mpa and maintain for 0.5 h - 1 h;

[0025] S43: Introduce argon with a purity of 99.99% into the box-type heating furnace, and the argon flow rate is 3 cm 3 / h - 5 cm 3 / h;

[0026] S44: Heat the inside of the box-type heating furnace from room temperature to 400 °C - 420 °C, keep it warm for 1 h - 2 h, then heat it up to 500 °C - 520 °C, and keep it warm for 0.5 h - 1 h;

[0027] S45: Rapidly cool the temperature inside the box-type heating furnace to room temperature within 3 min - 5 min.

[0028] Preferably, both the first weight plate and the second weight plate are stainless steel plates, and the thicknesses of the first weight plate and the second weight plate are both 200 mm - 300 mm.

[0029] Based on the same inventive principle, to achieve the above-mentioned third inventive purpose, the present invention provides a heat treatment device for a high flatness and high thermal conductivity titanium-aluminum composite plate, including a box-type heating furnace, a first weight plate, and a second weight plate;

[0030] Locking bolts are respectively arranged at the four corners of the first weight plate and the second weight plate;

[0031] A plurality of the high flatness and high thermal conductivity titanium-aluminum composite plates described in the first invention creation are sandwiched between the first weight plate and the second weight plate in a staggered layer manner for heat treatment.

[0032] Preferably, the heat treatment is carried out according to the following steps:

[0033] S41: Apply a pressure of 10 kg / mm 2 -15 kg / mm 2 to the second weight plate at a vertically downward angle;

[0034] S42: Evacuate the box-type heating furnace to -0.08 Mpa and maintain for 0.5 h - 1 h;

[0035] S43: Introduce argon with a purity of 99.99% into the box-type heating furnace, and the argon flow rate is 3 cm 3 / h - 5 cm 3 / h;

[0036] S44: Heat the inside of the box-type heating furnace from room temperature to 400 °C - 420 °C, keep it warm for 1 h - 2 h, then heat it up to 500 °C - 520 °C, and keep it warm for 0.5 h - 1 h;

[0037] S45: Rapidly cool the temperature in the box-type heating furnace to room temperature within 3 - 5 minutes by water cooling.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] (1) In the titanium-aluminum composite plate of the present invention, the thickness of the TC4 alloy titanium plate accounts for 12% - 50% of the total thickness. That is, the titanium-aluminum composite plate is mainly composed of high-strength aluminum plates. Considering that the high-strength aluminum plates have a lower density and lower cost, the titanium-aluminum composite plate has an advantage in terms of cost performance.

[0040] (2) The composite plate prepared by the thermal composite process is bow-shaped after cutting and severely warped, and cannot be used as a heat dissipation plate. To make the flatness of the composite plate between 0.5 mm and 1 mm, several sheets of staggered-layer stacked plates are clamped between the first counterweight plate and the second counterweight plate and heat-treated, so that the several sheets of staggered-layer stacked plates are simultaneously subjected to hot isostatic pressing and rapidly water-cooled under the isostatic pressing state, making the flatness of the composite plate between 0.5 mm and 1 mm, so as to prepare a high-throughput computing cabinet with the composite plate.

[0041] (3) A heat treatment device for the titanium-aluminum composite plate has been developed, which can clamp 30 - 50 sheets of staggered-layer stacked plates between the first counterweight plate and the second counterweight plate for heat treatment at one time, with high heat treatment efficiency and high flatness of the titanium-aluminum composite plate. Description of the Drawings

[0042] Figure 1 is a cross-sectional schematic view of the high-flatness and high-thermal-conductivity titanium-aluminum composite plate of the present invention.

[0043] Figure 2 is a cross-sectional schematic view of the staggered-layer stacked plates of the present invention.

[0044] Figure 3 is a cross-sectional schematic view of the staggered-layer stacked plates during and after the heat treatment process of the present invention.

[0045] Figure 4 is a cross-sectional schematic view of the heat treatment device for the high-flatness and high-thermal-conductivity titanium-aluminum composite plate of the present invention.

[0046] Figure 5 is a process flow chart of the forming process of the high-flatness and high-thermal-conductivity titanium-aluminum composite plate of the present invention.

[0047] Among them, 1. TC4 alloy titanium plate; 2. High-strength aluminum plate; 3. Plate; 31. First plate; 32. Second plate; 4. First counterweight plate; 5. Second counterweight plate; 6. Bolt; 7. Box-type heating furnace. Detailed Embodiments

[0048] The present invention will be described in detail below with reference to the embodiments shown in the drawings. It should be noted that these embodiments are not intended to limit the present invention. Any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present invention.

[0049] In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0050] Example 1

[0051] As shown Figure 1 in the figure, a specific embodiment of a high flatness and high thermal conductivity titanium-aluminum composite plate (hereinafter referred to as "titanium-aluminum composite plate") is disclosed in this embodiment.

[0052] A high flatness and high thermal conductivity titanium-aluminum composite plate, as shown Figure 1 in the figure, is composed of a TC4 alloy titanium plate 1 with a first thickness and a high-strength aluminum plate 2 with a second thickness. The composite preferably adopts a thermal composite process. The proportion of the first thickness in the total thickness of the composite plate is 12% - 50%, and the total thickness of the composite plate is 2.0 mm - 7.5 mm. The composition of the TC4 alloy titanium plate includes titanium: 86 wt% - 89 wt%, aluminum: 5.5 wt% - 6.8 wt%, vanadium: 3.5 wt% - 4.5 wt%. The composition of the high-strength aluminum plate is silicon: 0.4 wt% - 0.8 wt%, iron: 0.7 wt%, copper: 0.15 wt% - 0.4 wt%, manganese: 0.15 wt%, magnesium: 0.8 wt% - 1.2 wt%, chromium: 0.04 wt% - 0.35 wt%, zinc: 0.25 wt%, titanium: 0.15 wt% and aluminum.

[0053] Specifically, in the titanium-aluminum composite plate of this embodiment, the thickness of the TC4 alloy titanium plate 1 accounts for 12%-50% of the total thickness, and the high-strength aluminum plate 2 accounts for 50%-88% of the total thickness. That is, the titanium-aluminum composite plate is mainly composed of the high-strength aluminum plate 2. Given that the high-strength aluminum plate 2 has a lower density and lower cost, the titanium-aluminum composite plate has an advantage in terms of cost performance. For example, when the total thickness of the composite plate is 2.0 mm, the ratio of the first thickness to the second thickness is 1.5:2, that is, the high-strength aluminum plate 2 accounts for 57.1% of the total thickness, the thermal conductivity of the titanium-aluminum composite plate is 120.8 W / m·k, and the tensile strength is 558.9 Mpa; or when the total thickness of the composite plate is 5.0 mm, the ratio of the first thickness to the second thickness is 1:7, that is, the high-strength aluminum plate 2 accounts for 87.5% of the total thickness, the thermal conductivity of the titanium-aluminum composite plate is 180.3 W / m·k, and the tensile strength is 297.5 Mpa; or when the total thickness of the composite plate is 7.5 mm, the ratio of the first thickness to the second thickness is 5:12, that is, the high-strength aluminum plate 2 accounts for 70.6% of the total thickness, the thermal conductivity of the titanium-aluminum composite plate is 147.4 W / m·k, and the tensile strength is 442.8 Mpa.

[0054] Example 2

[0055] See Figures 1 to 5 As shown, this embodiment discloses a specific implementation manner of a forming process for a high-flatness and high-thermal-conductivity titanium-aluminum composite plate.

[0056] A forming process for a high-flatness and high-thermal-conductivity titanium-aluminum composite plate, see Figure 5 As shown, includes the following steps:

[0057] S1: Prepare a composite plate by thermally compounding a TC4 alloy titanium plate with a first thickness and a high-strength aluminum plate with a second thickness; specifically, see Figure 1 , the composition of the TC4 alloy titanium plate includes titanium: 86 wt%-89 wt%, aluminum: 5.5 wt%-6.8 wt%, vanadium: 3.5 wt%-4.5 wt%; the composition of the high-strength aluminum plate is silicon: 0.4 wt%-0.8 wt%, iron: 0.7 wt%, copper: 0.15 wt%-0.4 wt%, manganese: 0.15 wt%, magnesium: 0.8 wt%-1.2 wt%, chromium: 0.04 wt%-0.35 wt%, zinc: 0.25 wt%, titanium: 0.15 wt% and aluminum; preferably, the ratio of the first thickness to the total thickness of the composite plate is 12%-50%, and the total thickness of the composite plate is 2.0 mm-7.5 mm; the thickness of the TC4 alloy titanium plate 1 in the titanium-aluminum composite plate accounts for 12%-50% of the total thickness, and the high-strength aluminum plate 2 accounts for 50%-88% of the total thickness. That is, the titanium-aluminum composite plate is mainly composed of the high-strength aluminum plate 2. Given that the high-strength aluminum plate 2 has a lower density and lower cost, the titanium-aluminum composite plate has an advantage in terms of cost performance; due to the large difference in the thermal expansion coefficients of titanium and aluminum in the titanium-aluminum composite plate formed in this step, the cross-section of the titanium-aluminum composite plate presentsFigure 2 For the bow shown, the warpage at both ends of the titanium-aluminum composite plate exceeds 50 mm, making it difficult to be actually used.

[0058] S2: Cut the composite plate into several plates of the same size according to the set dimensions; specifically, the cross-sections of the several cut plates present Figure 2 the bow shown.

[0059] S3: Sandwich 30 - 50 staggered-layered plates 3 between the first counterweight plate 4 and the second counterweight plate 5, and lock the first counterweight plate 4 and the second counterweight plate 5 into one body through bolts 6; specifically, referring to Figure 2 , the staggered-layered plates 3 are composed of a first plate 31 and a second plate 32. The first plate 31 is placed flat with the aluminum side facing up, and the second plate 32 is placed between two adjacent first plates 31 with the aluminum side facing down. And the edges of the adjacent first plate 31 and the second plate 32 have an overlap of 1.5 cm. The staggered lamination helps to stabilize the laminated structure of 30 - 50 plates 3; with the first counterweight plate 4 as a support, place 30 - 50 staggered-layered plates 3 above the first counterweight plate 4 in a staggered manner, and then press the second counterweight plate 5 on the top of the laminated plates 3 to flatten the laminated plates 3 to Figure 3 the state shown.

[0060] S4: Place the first counterweight plate and the second counterweight plate into a box-type heating furnace for heat treatment; specifically, the heat treatment process is as follows:

[0061] S41: Apply a pressure of 10 kg / mm 2 -15 kg / mm 2 to the second counterweight plate at a vertically downward angle; in step S41, lift the first counterweight plate 4 and the second counterweight plate 5 into the box-type heating furnace 7. To further ensure the flatness of the laminated plates 3, apply a pressure of 10 kg / mm 2 -15 kg / mm 2 to the second counterweight plate at a vertically downward angle, press the laminated plates 3 tightly and then lock the bolts to make the contact between the layers of plates close.

[0062] S42: Vacuum the box-type heating furnace to -0.08 Mpa and maintain it for 0.5 h - 1 h; the purpose of step S42 is to pump out most of the oxygen in the box-type heating furnace.

[0063] S43: Introduce argon with a purity of 99.99% into the box-type heating furnace, and the argon flow rate is 3 cm 3 / h - 5 cm 3 / h; the purpose of step S43 is to make the inside of the box-type heating furnace an inert gas atmosphere environment to prevent the surface of the plates from being oxidized.

[0064] S44: In the box-type heating furnace, the temperature is raised from room temperature to 400°C - 420°C, held for 1h - 2h, then raised to 500°C - 520°C and held for 0.5h - 1h. Specifically, in step S44, the sheet material undergoes a first heating stage (400°C - 420°C) and a second heating stage (500°C - 520°C). A longer holding time in the first heating stage is beneficial to maintaining the stability of the titanium-aluminum composite interface. Holding for 0.5h - 1h in the second heating stage, with a short holding time, the aluminum grains of the high-strength aluminum sheet can be more uniform under a certain pressure, which helps to improve the strength of the composite sheet.

[0065] S45: Rapidly water-cool the temperature in the box-type heating furnace to room temperature within 3min - 5min. Specifically, in step S45, several sheets are rapidly cooled by water cooling, reducing the shrinkage amplitude of the titanium sheet and the aluminum sheet, which is beneficial to maintaining the flatness of the titanium-aluminum composite plate.

[0066] S5: After the first counterweight plate and the second counterweight plate are cooled, unlock the locking, and take out the composite plate with a warpage of 0.5mm - 1mm. Specifically, lift the first counterweight plate and the second counterweight plate cooled to room temperature out of the box-type heating furnace, unlock the second counterweight plate and move it away, obtaining a composite plate with a warpage of only 0.5mm - 1mm, such as 0.6mm, 0.7mm, 0.8mm, 0.9mm, with a significant improvement in flatness. When actually using the composite plate, it is necessary to further cut or trim the four peripheral edges of the composite plate by 2cm to further improve the flatness of the sheet.

[0067] The composite plate prepared by the thermal composite process is bow-shaped after cutting and severely warped and deformed, and cannot be used as a heat dissipation plate. Through this embodiment, in order to make the flatness of the composite plate between 0.5mm - 1mm, stack several sheets of staggered-layer sheets between the first counterweight plate and the second counterweight plate and perform heat treatment, so that several sheets of staggered-layer sheets are simultaneously subjected to hot isostatic pressing and rapidly water-cooled under the isostatic pressing state, making the flatness of the composite plate between 0.5mm - 1mm, so as to prepare a high-throughput computing cabinet with the composite plate.

[0068] Prepare the high-flatness and high-thermal-conductivity titanium-aluminum composite plate described in Example 1 by using steps S1 to S5 of Example 2. For the technical solutions with the same parts in this embodiment and Example 1, please refer to Example 1 and will not be elaborated here.

[0069] Example 3

[0070] Refer Figure 3 As shown, this embodiment discloses a specific implementation manner of a heat treatment device for a high-flatness and high-thermal-conductivity titanium-aluminum composite plate.

[0071] A heat treatment device for a high-flatness and high-thermal-conductivity titanium-aluminum composite plate, referFigure 3 As shown in the figure, it includes a box-type heating furnace 7, a first counterweight plate 4 and a second counterweight plate 5; locking bolts 6 are respectively arranged at the four corners of the first counterweight plate 4 and the second counterweight plate 5; a plurality of high-flatness and high-thermal-conductivity titanium-aluminum composite plates described in the first embodiment are heat-treated by sandwiching them between the first counterweight plate and the second counterweight plate in a staggered layer stacking manner.

[0072] Specifically, the specific manner of staggered layer stacking is as follows: Refer to Figure 2 , the staggered-layer stacked plate 3 is composed of a first plate 31 and a second plate 32. The first plate 31 is placed flat with the aluminum surface facing up, and the second plate 32 is placed between two adjacent first plates 31 with the aluminum surface facing down. And the edges of the adjacent first plate 31 and the second plate 32 have an overlap of 1.5 cm. The staggered layer stacking helps the stability of the stacked structure of 30 - 50 plates 3; with the first counterweight plate 4 as the support, 30 - 50 staggered-layer stacked plates 3 are placed above the first counterweight plate 4 in a staggered manner, and then the second counterweight plate 5 is pressed on the top of the stacked plates 3 to flatten the stacked plates 3 to Figure 3 the state shown in the figure.

[0073] The heat treatment of the staggered-layer stacked plate 3 is carried out according to the following steps:

[0074] S41: Apply a pressure of 10 kg / mm 2 -15 kg / mm 2 to the second counterweight plate at a vertically downward angle; in step S41, the first counterweight plate 4 and the second counterweight plate 5 are hoisted into the box-type heating furnace 7. To further ensure the flatness of the stacked plates 3, a pressure of 10 kg / mm 2 -15 kg / mm 2 is applied to the second counterweight plate 5 at a vertically downward angle. After pressing the stacked plates 3 tightly, the locking bolts are locked to make the contact between the layers of plates close.

[0075] S42: Evacuate the box-type heating furnace to -0.08 Mpa and maintain it for 0.5 h - 1 h; the purpose of step S42 is to evacuate most of the oxygen in the box-type heating furnace.

[0076] S43: Introduce argon with a purity of 99.99% into the box-type heating furnace, and the argon flow rate is 3 cm 3 / h - 5 cm 3 / h; the purpose of step S43 is to make the inside of the box-type heating furnace an inert gas atmosphere environment to prevent the surface of the plates from being oxidized.

[0077] S44: The temperature inside the box-type heating furnace rises from room temperature to 400°C - 420°C, and is kept warm for 1h - 2h, then rises to 500°C - 520°C and is kept warm for 0.5h - 1h; specifically, in step S44, the sheet experiences the first heating stage (400°C - 420°C) and the second heating stage (500°C - 520°C); a longer holding time in the first heating stage is beneficial to keeping the composite interface of titanium and aluminum stable; in the second heating stage, holding for 0.5h - 1h with a short holding time enables the aluminum grains of the high-strength aluminum sheet to be more uniform under a certain pressure, which helps to improve the strength of the composite sheet.

[0078] S45: Rapidly water-cool the temperature inside the box-type heating furnace to room temperature within 3min - 5min. Specifically, in step S45, several sheets are rapidly cooled by water cooling, reducing the shrinkage amplitude of the titanium sheet and the aluminum sheet, which is beneficial to maintaining the flatness of the titanium-aluminum composite plate.

[0079] After heat treatment, lift the first counterweight plate 4 and the second counterweight plate 5 cooled to room temperature out of the box-type heating furnace 7, unlock the second counterweight plate 5 and move it away to obtain a composite plate with a warpage of only 0.5mm - 1mm, with a significant improvement in flatness; when actually using the composite plate, it is necessary to further cut or trim the four peripheral edges of the composite plate by 2cm to further improve the flatness of the sheet.

[0080] The composite plate prepared by the thermal composite process is bow-shaped after cutting and severely warped and deformed, and cannot be used as a heat dissipation plate; through this embodiment, to make the flatness of the composite plate between 0.5mm - 1mm, several staggered-layered sheets are sandwiched between the first counterweight plate and the second counterweight plate and heat-treated, so that several staggered-layered sheets are simultaneously subjected to hot isostatic pressing and rapidly water-cooled under the isostatic pressing state, making the flatness of the composite plate between 0.5mm - 1mm, so that the composite plate can be used to prepare a high-throughput computing cabinet.

[0081] Use the heat treatment device of Example 3 to prepare the high-flatness and high-thermal-conductivity titanium-aluminum composite plate described in Example 1. For the technical solutions with the same parts in this embodiment and Example 1, please refer to Example 1 and will not be elaborated here.

Claims

1. A high-flatness and high-thermal-conductivity titanium-aluminum composite plate, characterized in that: It is composed of a TC4 alloy titanium plate of the first thickness and a high-strength aluminum plate of the second thickness; The first thickness accounts for 12% to 50% of the total thickness of the composite plate, and the total thickness of the composite plate is 2.0 mm to 7.5 mm; The composition of the TC4 alloy titanium plate includes titanium: 86wt%-89wt%, aluminum: 5.5wt%-6.8wt%, and vanadium: 3.5wt%-4.5wt%; The high-strength aluminum plate comprises silicon: 0.4wt%-0.8wt%, iron: 0.7wt%, copper: 0.15wt%-0.4wt%, manganese: 0.15wt%, magnesium: 0.8wt%-1.2wt%, chromium: 0.04wt%-0.35wt%, zinc: 0.25wt%, titanium: 0.15wt% and aluminum.

2. A forming process for a titanium-aluminum composite plate with high flatness and high thermal conductivity, characterized in that: The following steps are involved: S1: preparing a composite plate by a thermal composite process of a TC4 alloy titanium plate of a first thickness and a high-strength aluminum plate of a second thickness; S2: The composite board is cut into several boards of the same size according to the set size; S3: sandwiching 30 to 50 staggered stacked plates between the first counterweight plate and the second counterweight plate, and locking the first counterweight plate and the second counterweight plate into one body by bolts; S4: placing the first counterweight plate and the second counterweight plate into a box-type heating furnace for heat treatment; S5: After the first counterweight plate and the second counterweight plate are cooled, the locks are released, and the composite plate with a warpage of 0.5 mm to 1 mm is taken out.

3. The forming process of a titanium-aluminum composite plate with high flatness and high thermal conductivity as claimed in claim 1, characterized in that: The composition of the TC4 titanium alloy plate includes 86wt%-89wt% of titanium, 5.5wt%-6.8wt% of aluminum, and 3.5wt%-4.5wt% of vanadium.

4. The forming process of a titanium-aluminum composite plate with high flatness and high thermal conductivity as claimed in claim 3, characterized in that: The high-strength aluminum plate comprises silicon: 0.4wt%-0.8wt%, iron: 0.7wt%, copper: 0.15wt%-0.4wt%, manganese: 0.15wt%, magnesium: 0.8wt%-1.2wt%, chromium: 0.04wt%-0.35wt%, zinc: 0.25wt%, titanium: 0.15wt% and aluminum.

5. The forming process of a titanium-aluminum composite plate with high flatness and high thermal conductivity as claimed in claim 4, characterized in that: The first thickness accounts for 12%-50% of the total thickness of the composite plate, and the total thickness of the composite plate is 2.0 mm-7.5 mm.

6. A forming process for a titanium-aluminum composite plate with high flatness and high thermal conductivity as claimed in any one of claims 2 to 5, characterized in that: In step S3, the staggered stacked plates consist of a first plate and a second plate, wherein the first plate is laid flat with the aluminum surface facing upward, and the second plate is placed between two adjacent first plates with the aluminum surface facing downward.

7. The forming process of a titanium-aluminum composite plate with high flatness and high thermal conductivity as claimed in claim 6, characterized in that: In step S4, the heat treatment process is performed according to the following steps: S41: Apply 10kg / mm ​​to the second weight plate at a vertical downward angle 2 -15kg / mm 2 pressure; S42: evacuate the box-type heating furnace to -0.08Mpa and maintain it for 0.5h-1h; S43: Introduce argon gas with a purity of 99.99% into the box-type heating furnace at a flow rate of 3 cm 3 / h-5cm 3 / h; S44: The temperature in the box-type heating furnace is raised from room temperature to 400℃-420℃, kept at this temperature for 1h-2h, and then raised to 500℃-520℃, kept at this temperature for 0.5h-1h; S45: Rapidly cool the temperature in the box-type heating furnace to room temperature by water within 3min-5min.

8. The forming process of a titanium-aluminum composite plate with high flatness and high thermal conductivity as claimed in claim 6, characterized in that: The first counterweight plate and the second counterweight plate are both stainless steel plates, and the thickness of the first counterweight plate and the second counterweight plate are both 200 mm-300 mm.

9. A heat treatment device for a high-flatness and high-thermal-conductivity titanium-aluminum composite plate, characterized in that: It includes a box-type heating furnace, a first counterweight plate and a second counterweight plate; Locking bolts are respectively provided at four corners of the first counterweight plate and the second counterweight plate; The high-flatness and high-thermal-conductivity titanium-aluminum composite plate as claimed in claim 1 is sandwiched between a first counterweight plate and a second counterweight plate in a staggered stacking manner for heat treatment.

10. A heat treatment device for a high-flatness and high-thermal-conductivity titanium-aluminum composite plate, characterized in that: Heat treatment is carried out in the following steps: S41: Apply 10kg / mm ​​to the second weight plate at a vertical downward angle 2 -15kg / mm 2 pressure; S42: evacuate the box-type heating furnace to -0.08Mpa and maintain it for 0.5h-1h; S43: Introduce argon gas with a purity of 99.99% into the box-type heating furnace at a flow rate of 3 cm 3 / h-5cm 3 / h; S44: The temperature in the box-type heating furnace is raised from room temperature to 400℃-420℃, kept at this temperature for 1h-2h, and then raised to 500℃-520℃, kept at this temperature for 0.5h-1h; S45: Rapidly cool the temperature in the box-type heating furnace to room temperature by water within 3min-5min.

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