High-strength corrosion-resistant copper beryllium alloy sheet and preparation process thereof

Abstract

The invention discloses a high-strength corrosion-resistant copper beryllium alloy sheet and a preparation process thereof, and relates to the field of alloy preparation, raw materials Be and Cu are firstly mixed, the mixed raw materials are stacked according to the ratio of 1: 4, Ni, Cr / Zr / Nb and Re are added into the raw materials with the proportion of 1, smelting is performed in a vacuum induction smelting furnace, then the raw materials with the proportion of 4 are subjected to primary casting to obtain a cast ingot core, and the cast ingot core is subjected to secondary casting to obtain the high-strength corrosion-resistant copper beryllium alloy sheet. After the temperature of the cast ingot core body is reduced, the raw materials accounting for 1 are subjected to secondary pouring, and a cast ingot is obtained; and the cast ingot is subjected to electroslag remelting, forging cogging and head and tail cutting, the cast ingot is subjected to homogenization treatment, then hot rolling is conducted, and the hot-rolled plate is obtained. By wrapping the outer layer of the core body with high strength with the molten alloy with corrosion resistance, the casting preparation mode has the advantages of improving the comprehensive performance of the material, optimizing the material selection, improving the production efficiency, enhancing the structural reliability, widening the application range and reducing the maintenance cost.

Description

Technical Field

[0001] The invention mainly relates to the technical field of alloy preparation, and specifically relates to a high-strength, corrosion-resistant copper-beryllium alloy sheet and a preparation process thereof. Background Art

[0002] High-performance alloy materials usually have high strength and can maintain a stable structure in extreme environments. These materials have good toughness and can resist deformation and fracture. They have good tolerance to a variety of corrosive environments, including oxidizing, reducing and salt spray environments. They usually have good processing properties and can meet the manufacturing needs of complex components. With the advancement of science and technology and the innovation of new material technology, high-performance alloy materials will be used in more fields, such as biomedicine, new energy, etc.

[0003] A method for preparing a high-performance magnesium alloy sheet based on the prior art includes the following steps: providing a magnesium alloy sheet and subjecting the magnesium alloy sheet to homogenization annealing. Pre-compressing and deforming the magnesium alloy sheet along the direction a of the sheet, and after the first recrystallization annealing, pre-compressing and deforming the magnesium alloy sheet along the direction b of the sheet, wherein the direction b of the sheet is perpendicular to the direction a of the sheet, and then subjecting the magnesium alloy sheet to a second recrystallization annealing. Pre-tensioning and deforming the magnesium alloy sheet along the direction a of the sheet, and after the third recrystallization annealing, pre-tensioning and deforming the magnesium alloy sheet along the direction b of the sheet, and then subjecting the magnesium alloy sheet to a fourth recrystallization annealing.

[0004] In the above alloy preparation process, in order to achieve higher plate strength and formability, a pre-compression deformation method is adopted in the preparation process. However, in actual preparation and use, the following disadvantages exist: 1. The internal alloy structure of the prepared alloy changes, and grain growth and an increase in precipitates are likely to occur; 2. Excessive stretching may cause oxidation and decarburization on the surface of the alloy plate, affecting the surface quality of the material; 3. The processing technology is difficult to operate, and excessive stretching is prone to occur, which may easily lead to a decrease in alloy performance. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a high-strength, corrosion-resistant copper-beryllium alloy sheet and a preparation process thereof to solve the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A high-strength, corrosion-resistant copper-beryllium alloy sheet comprises the following components by mass percentage: Be: 1.6%-2.5%; Ni: 0.5%-1.5%; Cr / Zr / Nb: 0.3%-0.8%; Re: 0.05%-0.15%; the balance is Cu and unavoidable impurities.

[0007] Preferably, the copper-beryllium alloy sheet has a tensile strength of ≥1000 MPa, a yield strength of ≥900 MPa, an elongation of ≥10%, a corrosion rate of ≤0.01 mm / a in a 3.5% NaCl solution, and a thickness range of 0.5 mm to 1 mm.

[0008] A preparation process of a high-strength, corrosion-resistant copper-beryllium alloy sheet is also provided, which is applied to the preparation of the high-strength, corrosion-resistant copper-beryllium alloy sheet, and comprises the following steps: The raw materials Be and Cu are first mixed, and the mixed raw materials are divided into piles at a ratio of 1:4, and Ni, any one or more of Cr / Zr / Nb, and Re are added to the raw materials accounting for 1%, and then smelted in a vacuum induction melting furnace, and then the raw materials accounting for 4 are cast once to obtain an ingot core, and the temperature of the ingot core is waited to drop, and then the raw materials accounting for 1 are cast twice to obtain an ingot; The ingot is electroslag remelted, forged and opened, the head and tail are cut off, the ingot is homogenized, and then hot rolled to obtain hot-rolled plates; The hot rolled plates are subjected to solution heat treatment, rough rolling, side milling and second solution heat treatment; Then, the finished plate is cleaned, ground, and finished rolled to obtain the finished plate; the finished plate is subjected to aging heat treatment; The finished rolled plate after aging treatment is cleaned and degreased, stretched, bent and straightened, and the finished product is cut to obtain the final high-strength and corrosion-resistant copper-beryllium alloy sheet.

[0009] Preferably, the smelting temperature is 1400-1600°C, the primary casting and secondary casting temperatures are both 1200-1300°C, and the ingot core temperature drops specifically to 600-800°C; the resulting ingot size is 400x600x(800-1200) mm.

[0010] Preferably, the electroslag remelting heat treatment process uses an electroslag remelting furnace at a temperature of 1000-1150° C., and carbon powder is added; The forging process is specifically to heat the blank in a furnace at 980°C for 8 hours and keep it warm for 2 hours. After forging by a forging press, the blank is returned to the furnace and heated at 980°C for 2 hours. After being taken out of the furnace, secondary forging is performed to produce a blank. The homogenization treatment temperature is 800-900° C., and the heat preservation time is 10-15 hours; the hot rolling temperature is 900-1100° C., and the thickness of the hot-rolled plate after hot rolling is 10-20 mm.

[0011] Preferably, the solution heat treatment is specifically performed by using an air cushion continuous annealing furnace at a temperature of 850-950°C and a holding time of 1-3 hours; during the rough rolling process, a four-roll rough rolling mill is used, and the final cold rolling is performed to a thickness of 3-6 mm and 6 passes; the side milling treatment is specifically performed by a single-side milling amount of 2 mm; The second solution heat treatment is specifically an air cushion continuous annealing furnace, the annealing temperature is 820-850° C., the annealing speed is 51-54 / min, and the holding time is 2-3 hours.

[0012] Preferably, the cleaning and grinding adopts a thin belt cleaning machine, the grinding brush is made of SiC material, the mesh number is: 3000 mesh, and the grinding current is 7~9A; The finishing rolling process specifically adopts a twenty-roll finishing mill to roll to 0.5mm~1mm, with a total of 6~7 rolling passes, a rolling speed of 120~180m / min, and the front and rear tensions are controlled at 20~40KN.

[0013] Preferably, the aging heat treatment process is specifically performed using a bell furnace in an inert gas environment at a temperature of 380-450° C. and a holding time of 4-8 hours.

[0014] In summary, the present invention mainly has the following beneficial effects: The high-strength corrosion-resistant copper-beryllium alloy sheet and preparation process of the present invention, and rare earth elements are added to the copper-beryllium alloy components. Under the condition of ensuring high-strength performance, during the casting process, the molten alloy with corrosion resistance is wrapped in the outer layer of the core with high-strength performance. In this way, the high-strength performance of the core material is achieved to ensure the strength and bearing capacity of the overall structure. The outer layer of corrosion-resistant alloy effectively resists the erosion of corrosive media and prolongs the service life of the material; In addition, this casting process can complete the bonding of the core and the outer layer at one time, avoiding complicated post-processing processes. This preparation method helps to simplify the production process, improve production efficiency, and is simple to operate. It can better guarantee the performance of the finished alloy material. At the same time, since the core and the outer layer are tightly bonded together through the casting process, the bonding strength between them is relatively high. This tight bonding helps to enhance the reliability and stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall production process flow chart of the present invention; Figure 2 It is a rough rolling process parameter diagram of the present invention; Figure 3 This is a finishing rolling process parameter diagram of the present invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Example

[0017] like Figure 1 As Figure 3 As shown, a high-strength, corrosion-resistant copper-beryllium alloy sheet comprises the following components by mass percentage: Be: 1.6%-2.5%; Ni: 0.5%-1.5%; Cr / Zr / Nb: 0.3%-0.8%; Re: 0.05%-0.15%; the remainder is Cu and unavoidable impurities.

[0018] After testing, the properties of copper-beryllium alloy thin plates are as follows: tensile strength ≥1000MPa, yield strength ≥900MPa, elongation ≥10%, corrosion rate in 3.5% NaCl solution ≤0.01mm / a, and the finished product thickness ranges from 0.5mm to 1mm.

[0019] The following specific preparation method of high-strength corrosion-resistant copper-beryllium alloy sheet comprises the following steps: The raw materials Be and Cu are first mixed, and the mixed raw materials are divided into piles at a ratio of 1:4, and Ni, any one or more of Cr / Zr / Nb, and Re are added to the raw materials accounting for 1%, and then smelted in a vacuum induction melting furnace, and then the raw materials accounting for 4 are cast once to obtain an ingot core, and the temperature of the ingot core is waited to drop, and then the raw materials accounting for 1 are cast twice to obtain an ingot; The ingot is electroslag remelted, forged and opened, the head and tail are cut off, the ingot is homogenized, and then hot rolled to obtain hot-rolled plates; The hot rolled plates are subjected to solution heat treatment, rough rolling, side milling and second solution heat treatment; Then, the finished plate is cleaned, ground, and finished rolled to obtain the finished plate; the finished plate is subjected to aging heat treatment; The finished rolled plate after aging treatment is cleaned and degreased, stretched, bent and straightened, and the finished product is cut to obtain the final high-strength and corrosion-resistant copper-beryllium alloy sheet.

[0020] The melting temperature is 1400-1600°C, the primary casting and secondary casting temperatures are both 1200-1300°C, and the ingot core temperature drops specifically to 600-800°C; the size of the obtained ingot is 400x600x(800-1200) mm.

[0021] The electroslag remelting heat treatment process uses an electroslag remelting furnace with a temperature of 1000~1150℃ and adds carbon powder; The forging process is to heat the blank in a furnace at 980℃ for 8 hours and keep it warm for 2 hours. After forging with a forging press, the blank is returned to the furnace and heated at 980℃ for 2 hours. After it is taken out of the furnace, it is forged again and the blank is punched out. The homogenization treatment temperature is 800~900℃, and the holding time is 10~15 hours; the hot rolling temperature is 900~1100℃, and the thickness of the hot rolled plate after hot rolling is 10~20mm.

[0022] The solution heat treatment is specifically performed by using an air cushion continuous annealing furnace at a temperature of 850-950°C and a holding time of 1-3 hours; the rough rolling process is performed by using a four-roll rough rolling mill, and finally cold rolling is performed to a thickness of 3-6 mm and 6 passes; the side milling treatment is specifically performed by a single-side milling amount of 2 mm; The second solution heat treatment is specifically an air cushion continuous annealing furnace, with an annealing temperature of 820~850℃, an annealing speed of 51~54 / min, and a holding time of 2~3 hours.

[0023] The cleaning and grinding adopts a thin belt cleaning machine, the grinding brush is made of SiC material, the mesh size is: 3000 mesh, and the grinding current is 7~9A; The specific finishing rolling process is to use a twenty-roll finishing mill to roll to 0.5mm~1mm, with a total of 6~7 rolling passes, a rolling speed of 120~180m / min, and the front and rear tensions are controlled at 20~40KN.

[0024] The aging heat treatment process specifically uses a bell furnace in an inert gas environment, with a temperature of 380~450℃ and a holding time of 4~8 hours.

[0025] Example 1: The following components are used: Be: 1.6%; Ni: 1%; Nb: 0.5%; Re: 0.05%; the balance is Cu as raw materials. Be can significantly improve the strength and hardness of the alloy, and the addition of Ni, Nb, and Re can enhance the corrosion resistance of the alloy, especially in a humid and corrosive environment.

[0026] The raw materials Be and Cu are first mixed, and the mixed raw materials are piled at a ratio of 1:4. Ni, Nb and Re are added to the raw materials accounting for 1%, and the raw materials are smelted in a vacuum induction melting furnace at a smelting temperature of 1400~1600℃. Subsequently, the raw materials accounting for 4% are cast once to obtain an ingot core at a temperature of 1200~1300℃. After the temperature of the ingot core drops by 600~800℃, the raw materials accounting for 1% are cast twice at a temperature of 1200~1300℃ to obtain an ingot size of 400x600x(800~1200)mm. The ingot is subjected to electroslag remelting heat treatment in an electroslag remelting furnace at a temperature of 1000~1150℃, and carbon powder is added to remove residual oxygen in the electroslag remelting furnace environment to prevent alloy oxidation and affect the performance of the finished product.

[0027] The forging process is to heat the blank in a furnace at 980℃ for 8h and keep it warm for 2h. After forging with a forging press, the blank is returned to the furnace and heated at 980℃ for 2h. After being taken out of the furnace, it is forged for a second time and the blank is punched out. Through forging, the core of the ingot and the outer layer are better fused to ensure the uniform metallographic structure of the finished product.

[0028] The temperature for cutting off the head and tail and homogenizing the ingot is 800~900℃, and the holding time is 10~15 hours; the hot rolling temperature is 900~1100℃, and the thickness of the hot rolled plate after hot rolling is 10mm.

[0029] Solution heat treatment of hot-rolled plates is carried out using an air cushion continuous annealing furnace at a temperature of 850-950°C and a holding time of 1-3 hours; During the rough rolling process, a four-roll rough rolling mill is used, and the final cold rolling is to 3 thicknesses, which are 10mm→8.2mm→6.7mm→5.2mm→4.1mm→3.5mm→3.0mm, and the rolling is 6 times, as shown in the following figure. Figure 2 shown.

[0030] The side milling treatment is specifically a single-side milling amount of 2mm to remove edge impurities. The second solid solution heat treatment is specifically an air cushion continuous annealing furnace with an annealing temperature of 820~850℃, an annealing speed of 51~54 / min, and a holding time of 2~3 hours. Then it is cleaned and ground using a thin belt cleaning machine. The grinding brush is made of SiC with a mesh size of 3000 and a grinding current of 7~9A. The finishing rolling process uses a 20-roller finishing mill to roll to 0.5mm, followed by 3.0mm→2.46mm→2.01mm→1.61mm→1.26mm→0.96mm→0.71mm→0.51mm, a total of 7 passes, the rolling speed is 120~180m / min, and the front and rear tensions are controlled at 20~40KN. Figure 3 shown.

[0031] The aging heat treatment process for 0.51mm fine rolled plate is specifically to use a bell furnace in an inert gas environment, the temperature is 380~450℃, and the insulation time is 4~8 hours; The 0.51mm fine-rolled plate after aging treatment is cleaned and degreased, then ground to a thickness of 0.01mm, stretched, bent and straightened, and the finished product is cut to obtain the final 0.5mm high-strength and corrosion-resistant copper-beryllium alloy sheet.

[0032] Example 2: The following components are used: Be: 2.5%; Ni: 1%; Cr: 0.5%; Re: 0.05%; the balance is Cu as raw materials; and the same processing method as Example 1 is used for preparation.

[0033] The raw materials Be and Cu are first mixed, and the mixed raw materials are piled at a ratio of 1:4. Ni, Cr, and Re are added to the raw materials accounting for 1%, and the raw materials are smelted in a vacuum induction melting furnace at a smelting temperature of 1400~1600℃. Subsequently, the raw materials accounting for 4% are cast once to obtain an ingot core at a temperature of 1200~1300℃. After the temperature of the ingot core drops by 600~800℃, the raw materials accounting for 1% are cast twice at a temperature of 1200~1300℃ to obtain an ingot size of 400x600x(800~1200)mm. The ingot is subjected to electroslag remelting heat treatment in an electroslag remelting furnace at a temperature of 1000-1150°C, and carbon powder is added to remove residual oxygen in the electroslag remelting furnace environment.

[0034] The forging process is to heat the blank in a furnace at 980℃ for 8 hours and keep it warm for 2 hours. After forging with a forging press, return it to the furnace and heat it at 980℃ for 2 hours. After it is taken out of the furnace, it is forged for a second time and the blank is punched out. The blank is forged.

[0035] The temperature for cutting off the head and tail and homogenizing the ingot is 800~900℃, and the holding time is 10~15 hours; the hot rolling temperature is 900~1100℃, and the thickness of the hot rolled plate after hot rolling is 10mm.

[0036] Solution heat treatment of hot-rolled plates is carried out using an air cushion continuous annealing furnace at a temperature of 850-950°C and a holding time of 1-3 hours; During the rough rolling process, a four-roll rough rolling mill was used, and the final cold rolling was to a thickness of 3, with 6 rolling passes; The side milling treatment is specifically a single-side milling amount of 2mm to remove edge impurities. The second solid solution heat treatment is specifically an air cushion continuous annealing furnace with an annealing temperature of 820~850℃, an annealing speed of 51~54 / min, and a holding time of 2~3 hours. Then it is cleaned and ground using a thin belt cleaning machine. The grinding brush is made of SiC with a mesh size of 3000 and a grinding current of 7~9A. The finishing rolling process uses a twenty-roll finishing mill to roll to 0.5mm, with a total of 7 passes, a rolling speed of 120~180m / min, and the front and rear tensions are controlled at 20~40KN.

[0037] The aging heat treatment process for 0.51mm fine rolled plate is specifically to use a bell furnace in an inert gas environment, the temperature is 380~450℃, and the insulation time is 4~8 hours; The finished rolled plate after aging treatment is cleaned and degreased, stretched, bent and straightened, and the finished product is cut to obtain the final 0.5mm high-strength and corrosion-resistant copper-beryllium alloy sheet.

[0038] After testing, the alloy properties of Example 1 and Example 2 can reach tensile strength ≥ 1000 MPa, yield strength ≥ 900 MPa, elongation ≥ 10%, and corrosion rate in 3.5% NaCl solution ≤ 0.01 mm / a.

[0039] Comparative Example 1: The following components are used: Be: 1.6%; Ni: 1%; Nb: 0.5%; Re: 0.05%; the balance is Cu as raw materials. Be can significantly improve the strength and hardness of the alloy, and the addition of Ni, Nb, and Re can enhance the corrosion resistance of the alloy, especially in humid and corrosive environments.

[0040] The raw materials Be and Cu are first mixed, and the mixed raw materials are piled at a ratio of 1:9. Ni, Nb and Re are added to the raw materials accounting for 9%, and smelted in a vacuum induction melting furnace at a smelting temperature of 1400~1600℃. Subsequently, the raw materials accounting for 9% are cast once to obtain an ingot core at a temperature of 1200~1300℃. After the temperature of the ingot core drops by 600~800℃, the raw materials accounting for 1% are cast twice at a temperature of 1200~1300℃.

[0041] Comparative Example 2: The following components are used: Be: 1.6%; Ni: 1%; Nb: 0.5%; Re: 0.05%; the balance is Cu as raw materials. Be can significantly improve the strength and hardness of the alloy, and the addition of Ni, Nb, and Re can enhance the corrosion resistance of the alloy, especially in humid and corrosive environments.

[0042] The raw materials Be and Cu are first mixed, and the mixed raw materials are piled according to 3:7. Ni, Nb and Re are added to the raw materials accounting for 7%, and smelted in a vacuum induction melting furnace at a smelting temperature of 1400~1600℃. Subsequently, the raw materials accounting for 7% are cast once to obtain an ingot core at a temperature of 1200~1300℃. After the temperature of the ingot core drops by 600~800℃, the raw materials accounting for 3% are cast twice at a temperature of 1200~1300℃.

[0043] Comparative Example 3: The following components are used: Be: 1.6%; Ni: 1%; Nb: 0.5%; Re: 0.05%; the balance is Cu as raw materials. Be can significantly improve the strength and hardness of the alloy, and the addition of Ni, Nb, and Re can enhance the corrosion resistance of the alloy, especially in humid and corrosive environments.

[0044] The raw materials Be and Cu are first mixed, and the mixed raw materials are piled at a ratio of 2:3. Ni, Nb and Re are added to the raw materials accounting for 3%, and the raw materials are smelted in a vacuum induction melting furnace at a smelting temperature of 1400~1600℃. Subsequently, the raw materials accounting for 3 are cast once to obtain an ingot core at a temperature of 1200~1300℃. After the temperature of the ingot core drops by 600~800℃, the raw materials accounting for 2 are cast twice at a temperature of 1200~1300℃.

[0045] The results of casting ingots by comparing Example 1 with Comparative Examples 1, 2 and 3 and the subsequent preparation process have the following problems: In the comparison between Example 1 and Comparative Example 1, the ratio is adjusted to be smaller, that is, the portion of the primary casting is reduced, and the portion of the secondary casting is increased: For the primary casting part, which accounts for 9%, increasing the amount of raw materials may cause the ingot core size to be too large. If it is not fully filled during the secondary casting, defects such as voids or shrinkage may form.

[0046] Similarly, the ingot as a whole may also have problems with uneven composition, but this time it is the increase in the proportion of raw materials (9%) in the ingot that leads to a decrease in the overall performance of the ingot.

[0047] In Example 1, Comparative Example 2 and Comparative Example 3, the ratio is increased, that is, the portion of the primary casting is increased, and the portion of the secondary casting is reduced: For the core part, reducing the amount of raw materials may result in a smaller size of the ingot core, affecting the filling effect of the subsequent secondary casting; a smaller size of the ingot core means that there is less space to accommodate the alloy melt for secondary casting. If the amount of alloy melt remains unchanged during the secondary casting, the alloy melt may not be able to completely fill the gap around the ingot core due to insufficient space, resulting in insufficient filling defects.

[0048] Voids and slag inclusions: Insufficiently filled areas may form voids after the casting cools and solidifies. In addition, due to insufficient filling, impurities and oxides in the melt may accumulate more easily in these areas, forming slag inclusion defects.

[0049] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-strength, corrosion-resistant copper-beryllium alloy sheet. Features , calculated by mass percentage, includes the following components: Be: 1.6%-2.5%; Ni: 0.5%-1.5%; Cr / Zr / Nb: 0.3%-0.8%; Re: 0.05%-0.15%; The balance is Cu and inevitable impurities.

2. A high-strength, corrosion-resistant copper-beryllium alloy sheet according to claim 1, It is characterized in that The copper-beryllium alloy thin plate has a tensile strength of ≥1000MPa, a yield strength of ≥900MPa, an elongation of ≥10%, a corrosion rate of ≤0.01mm / a in a 3.5% NaCl solution, and a thickness range of 0.5mm-1mm.

3. A preparation process of a high-strength, corrosion-resistant copper-beryllium alloy sheet, applied to a high-strength, corrosion-resistant copper-beryllium alloy sheet as claimed in any one of claims 1 to 2, It is characterized in that The following steps are involved: S1: Mix the raw materials Be and Cu first, divide the mixed raw materials into piles at a ratio of 1:4, add Ni, any one or more of Cr / Zr / Nb, and Re to the raw materials accounting for 1%, and smelt them in a vacuum induction melting furnace, then cast the raw materials accounting for 4% to obtain an ingot core, wait for the temperature of the ingot core to drop, and then cast the raw materials accounting for 1% to obtain an ingot; S2: electroslag remelting, forging and splitting of the ingot, cutting off the head and tail, homogenizing the ingot, and then hot rolling to obtain hot-rolled plates; S3: Solution heat treatment, rough rolling, side milling and second solution heat treatment of the hot rolled plate; S4: then cleaning and grinding, and finish rolling to obtain a finished plate; and performing aging heat treatment on the finished plate; S5: The finished rolled plate after aging treatment is cleaned and degreased, bent and straightened, and the finished product is cut to obtain the final high-strength and corrosion-resistant copper-beryllium alloy sheet.

4. A process for preparing a high-strength, corrosion-resistant copper-beryllium alloy sheet according to claim 3, It is characterized in that The smelting temperature is 1400-1600°C, the primary casting and secondary casting temperatures are both 1200-1300°C, and the ingot core temperature is specifically reduced to 600-800°C; the size of the obtained ingot is 400x600x(800-1200) mm.

5. A process for preparing a high-strength, corrosion-resistant copper-beryllium alloy sheet according to claim 3, It is characterized in that The electroslag remelting heat treatment process uses an electroslag remelting furnace with a temperature of 1000-1150°C and adds carbon powder; The forging process is specifically to heat the blank in a furnace at 980°C for 8 hours and keep it warm for 2 hours. After forging by a forging press, the blank is returned to the furnace and heated at 980°C for 2 hours. After being taken out of the furnace, secondary forging is performed to punch out a blank. The homogenization treatment temperature is 800-900° C., and the insulation time is 10-15 hours; the hot rolling temperature is 900-1100° C., and the thickness of the hot-rolled plate after hot rolling is 10-20 mm.

6. A process for preparing a high-strength, corrosion-resistant copper-beryllium alloy sheet according to claim 3, It is characterized in that The solution heat treatment is specifically performed by using an air cushion continuous annealing furnace at a temperature of 850-950°C and a holding time of 1-3 hours; the rough rolling process is performed by using a four-roll rough rolling mill, and finally cold rolling is performed to a thickness of 3-6 mm and 6 passes; the side milling treatment is specifically performed by a single-side milling amount of 2 mm; The second solution heat treatment is specifically an air cushion continuous annealing furnace, the annealing temperature is 820-850° C., the annealing speed is 51-54 / min, and the holding time is 2-3 hours.

7. A process for preparing a high-strength, corrosion-resistant copper-beryllium alloy sheet according to claim 3, It is characterized in that The cleaning and grinding adopts a thin belt cleaning machine, the grinding brush is made of SiC material, the mesh number is: 3000 mesh, and the grinding current is 7~9A; The finishing rolling process specifically adopts a twenty-roll finishing mill to roll to 0.5mm~1mm, with a total of 6~7 rolling passes, a rolling speed of 120~180m / min, and the front and rear tensions are controlled at 20~40KN.

8. A process for preparing a high-strength, corrosion-resistant copper-beryllium alloy sheet according to claim 3, It is characterized in that The aging heat treatment process specifically uses a bell furnace in an inert gas environment at a temperature of 380-450° C. and a heat preservation time of 4-8 hours.

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