Direct hot isostatic pressing forming method for beryllium powder

Abstract

The invention discloses a direct hot isostatic pressing forming method for beryllium powder, and belongs to the technical field of beryllium piece manufacturing. The direct hot isostatic pressing forming method for the beryllium powder comprises the following steps that S1, a low-carbon steel sheath with the same shape and size as a formed beryllium piece to be prepared is manufactured; step S2, filling beryllium powder into a low-carbon steel sheath, and then welding and sealing; s3, the welded and sealed low-carbon steel ladle set is clamped into a degassing furnace to be subjected to degassing treatment, and a beryllium blank is obtained; and S4, the beryllium blank is sequentially subjected to hot isostatic pressing treatment, acid pickling and heat treatment, and the formed beryllium piece is obtained. According to the method, formed beryllium pieces of different shapes and sizes can be prepared, the process period is short, the working procedure is simple, the utilization rate and production efficiency of beryllium materials can be improved, cost is low, and market requirements are met.

Description

Technical Field

[0001] The invention belongs to the technical field of beryllium part manufacturing, and in particular relates to a direct hot isostatic pressing method of beryllium powder. Background Art

[0002] In today's advanced manufacturing industry, there is a growing demand for high-performance materials and complex-shaped parts. Beryllium metal is a unique structural and functional material with advantages such as low density, high stiffness, low melting point, low thermal neutron absorption cross-section, and high infrared reflectivity. Its excellent physical and nuclear properties are unmatched by other metals, leading to its application in the nuclear industry, aerospace, electronic information systems, X-ray instrumentation, and other fields.

[0003] In recent years, with the rapid development of my country's nuclear, aerospace, and other fields, the demand for special-shaped beryllium parts has increased significantly, requiring significant improvements in beryllium production efficiency and yield. Furthermore, the complex structures and high performance requirements of special-shaped, pancake-shaped, and tubular parts make traditional forming technologies difficult to meet. Therefore, optimizing and improving beryllium forming processes is imperative.

[0004] At present, the preparation and forming of beryllium and beryllium alloy materials mainly use cold isostatic pressing and hot isostatic pressing in powder metallurgy process. However, the isostatic pressing forming process of beryllium materials has problems such as long process cycle, complex procedures, long design and production cycle of cold isostatic pressing sleeves, difficulty in cold pressing and sealing, inability to produce pancake-shaped blanks, difficulty in producing special-shaped blanks and tubular blanks, etc., resulting in low utilization rate of beryllium materials, low production efficiency, high cost and inability to meet market demand. Summary of the Invention

[0005] The object of the present invention is to provide a method for direct hot isostatic pressing of beryllium powder, which can produce formed beryllium parts of different shapes and sizes, and has a short process cycle and simple procedures, which is conducive to improving the utilization rate and production efficiency of beryllium materials, and is low in cost, meeting market demand.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for direct hot isostatic pressing of beryllium powder, comprising the following steps:

[0008] Step S1, preparing a low-carbon steel sheath having the same shape and size as the formed beryllium part to be prepared;

[0009] Step S2, placing beryllium powder into a low-carbon steel sheath and welding and sealing the sheath;

[0010] Step S3, placing the welded and sealed low-carbon steel ladle set into a degassing furnace for degassing to obtain a beryllium billet;

[0011] Step S4: subjecting the beryllium blank to hot isostatic pressing, pickling, and heat treatment in sequence to obtain a formed beryllium part.

[0012] Furthermore, in step S3, the vacuum degree of the degassing treatment is 4×10 -2 ~5×10 -2 Pa, temperature is 680~760℃, and time is 2~3h.

[0013] Furthermore, in the step S3, the temperature of the degassing treatment is 710-750°C.

[0014] Furthermore, in step S4, the specific process of the hot isostatic pressing treatment is:

[0015] The beryllium billet is heated to 1090-1160°C under a pressure of 120-150 MPa, kept warm for 3-5 hours, and then cooled to 580-620°C after 8-9 hours, and then the power is turned off, and the billet is cooled and taken out of the furnace.

[0016] Furthermore, in the step S4, the pressure of the hot isostatic pressing treatment is 130-140 MPa and the temperature is 1110-1150°C.

[0017] Furthermore, in step S4, the specific process of the heat treatment is:

[0018] The pickled beryllium blank is heated to 1140-1190°C, kept warm for 3-5 hours, then cooled to 510-540°C with power on, and kept warm for 4-5 hours.

[0019] Furthermore, in the step S4, the temperature of the heat treatment is 1150-1180°C.

[0020] Furthermore, the shaped beryllium piece is a special-shaped beryllium piece, a pancake-shaped beryllium piece, and a tubular beryllium piece.

[0021] Furthermore, the formed beryllium part has a purity of ≥98.50%, a tensile strength of ≥410.0 MPa, a yield strength of ≥310.0 MPa, an elongation of ≥1.50%, and an elastic modulus of ≥289.0 GPa.

[0022] Furthermore, the formed beryllium part has a purity of 98.91-99.05%, a tensile strength of 542.0-584.0 MPa, a yield strength of 410.0-509.6 MPa, an elongation of 2.24-4.89%, and an elastic modulus of 307.5-311.0 GPa.

[0023] In summary, the solution proposed in the present invention has the following technical effects:

[0024] The present invention completes the production of beryllium parts of different shapes (such as special-shaped beryllium parts, pancake-shaped beryllium parts and tubular beryllium parts) through direct hot isostatic pressing of beryllium powder; the forming process cycle of the beryllium parts of the present invention is short and the process is simple, and the direct hot isostatic pressing of beryllium powder has great advantages for complex special-shaped blanks. Compared with the design and production of cold isostatic pressed rubber or silicone sheaths, hot isostatic pressed steel sheaths are easier to design and process; the present invention effectively solves the problems of long design and production cycle of cold isostatic pressed sheaths, difficulty in cold pressing sealing, inability to produce pancake-shaped blanks, difficulty in producing special-shaped blanks and tubular blanks, shortens the process flow of beryllium material forming, reduces costs, and improves the production efficiency and yield rate of beryllium material products; the purity, strength and elongation of the beryllium parts produced by the present invention are greatly improved, fully meet the product performance requirements, and provide reliable technical support for the manufacture of key components in my country's aerospace and nuclear industry fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 Schematic diagram of the shape of the special-shaped beryllium piece of Example 1;

[0027] Figure 2 Schematic diagram of the shape of the pancake-shaped beryllium piece of Example 3;

[0028] Figure 3 Schematic diagram of the shape of the tubular beryllium piece of Example 5. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] This embodiment provides a method for direct hot isostatic pressing of beryllium powder, which includes the following steps:

[0031] Step S1: preparing a low-carbon steel sheath having the same shape and size as the formed beryllium part to be prepared.

[0032] The low carbon steel sheath in this embodiment can be made of grade ST14. The low carbon steel sheath can be designed, manufactured and welded according to the shape and size of the blank (the formed beryllium part to be prepared) with a 20% shrinkage.

[0033] Step S2: putting beryllium powder into a low-carbon steel sheath and welding and sealing it.

[0034] In this embodiment, mechanical vibration can be used to load the powder. The beryllium powder barrel is sealed to the powder port of the mild steel ladle, and the beryllium powder is then loaded into the mild steel ladle. Alternatively, the beryllium powder can be directly poured into the mild steel ladle and compacted. The powder port is then welded to the plug and the exhaust pipe to seal it.

[0035] Step S3: The welded and sealed low-carbon steel ladle set is clamped into a degassing furnace for degassing to obtain a beryllium billet.

[0036] In order to prevent the oxidation of beryllium powder and the presence of internal defects in the formed beryllium material, and to effectively extract the gas in the beryllium powder, this embodiment installs the welded steel ladle through the exhaust pipe and clamps it into the degassing furnace for degassing treatment to remove the oxygen, hydrogen, nitrogen and other gases released by the beryllium powder, while reducing the cost of equipment use. The vacuum degree of the degassing treatment in this embodiment is 4×10 -2 ~5×10 -2 Pa, the temperature is 680-760°C, preferably 710-750°C, and the time is 2-3h.

[0037] Step S4: subjecting the beryllium blank to hot isostatic pressing, pickling, and heat treatment in sequence to obtain a formed beryllium part.

[0038] In order to ensure that the beryllium parts can be fully formed, promote the densification of the beryllium parts, and improve the consistency and stability of the performance of the beryllium parts, this embodiment adopts hot isostatic pressing. The specific process of hot isostatic pressing is as follows:

[0039] The beryllium blank is heated to 1090-1160°C under a pressure of 120-150 MPa, held at this temperature for 3-5 hours, and then cooled to 580-620°C after 8-9 hours, then the power is turned off, and the blank is allowed to cool and be removed from the furnace. The pressure during hot isostatic pressing is preferably 130-140 MPa, and the temperature is preferably 1110-1150°C.

[0040] In order to avoid thermal stress concentration caused by rapid cooling and prevent defects such as cracks and deformation in the beryllium parts, this embodiment cuts off the power at 580-620°C and then cools naturally, thereby ensuring the dimensional accuracy and performance stability of the beryllium parts.

[0041] In order to ensure the uniformity of the beryllium grains and improve the elongation of the beryllium part, the specific process of the heat treatment in this embodiment is as follows:

[0042] The pickled beryllium blank is heated to 1140-1190° C., preferably 1150-1180° C., kept at this temperature for 3-5 hours, then cooled to 510-540° C., and kept at this temperature for 4-5 hours.

[0043] This embodiment adopts a method of cooling the temperature to 510-540° C. under power and then continuing to keep the temperature, which promotes the full release of thermal stress and reduces the residual stress inside the material. At the same time, it further optimizes the grains, makes the grain size more uniform, and improves the overall performance of the beryllium parts.

[0044] The formed beryllium parts in this embodiment include special-shaped beryllium parts, pancake-shaped beryllium parts, and tubular beryllium parts. The formed beryllium parts in this embodiment have a purity of ≥98.50%, a tensile strength of ≥410.0 MPa, a yield strength of ≥310.0 MPa, an elongation of ≥1.50%, and an elastic modulus of ≥289.0 GPa. Preferably, the beryllium parts have a purity of 98.91-99.05%, a tensile strength of 542.0-584.0 MPa, a yield strength of 410.0-509.6 MPa, an elongation of 2.24-4.89%, and an elastic modulus of 307.5-311.0 GPa.

[0045] This embodiment uses direct hot isostatic pressing of beryllium powder to produce beryllium parts of different shapes (such as special-shaped beryllium parts, pancake-shaped beryllium parts and tubular beryllium parts); the forming process cycle of the beryllium parts of the present invention is short and the process is simple. Direct hot isostatic pressing of beryllium powder has great advantages for complex special-shaped blanks. Compared with the design and production of cold isostatic pressed rubber or silicone sheaths, hot isostatic pressed steel sheaths are easier to design and process; this embodiment effectively solves the problems of long design and production cycle of cold isostatic pressed sheaths, difficulty in cold pressing sealing, inability to produce pancake-shaped blanks, difficulty in producing special-shaped blanks and tubular blanks, shortens the process flow of beryllium material forming, reduces costs, and improves the production efficiency and yield rate of beryllium material products; the purity, strength and elongation of the beryllium parts produced in this embodiment are greatly improved, fully meet the product performance requirements, and provide reliable technical support for the manufacture of key components in my country's aerospace and nuclear industries.

[0046] The technical solution of this application is introduced below with specific embodiments:

[0047] Example 1:

[0048] Step S1, design and manufacture the special-shaped beryllium parts to be prepared (such as Figure 1 The shape and size of the ST14 low carbon steel sheath are the same as shown.

[0049] Step S2: Use mechanical vibration to load the beryllium powder into the powder barrel, then seal the powder barrel with the powder loading port of the ST14 low-carbon steel ladle, and load the beryllium powder into the ST14 low-carbon steel ladle through the powder loading port.

[0050] Step S3: Put the ST14 low carbon steel ladle containing beryllium powder into the degassing furnace and -2 Pa and a temperature of 730 ° C, degassing treatment is carried out for 2.5 hours to obtain a beryllium blank. After the degassing treatment is completed, it is sealed and welded, and the material enters the next process after cooling.

[0051] Step S4: The degassed, sealed, and welded beryllium blank is placed in a hot isostatic press and heated to 1145°C at a pressure of 130 MPa. After holding for 4 hours, the temperature is reduced to 605°C after 8.5 hours (i.e., hours), and the power is turned off. The hot isostatically pressed beryllium blank is then placed in a pickling tank and pickled to remove the ST14 low-carbon steel sheath, resulting in a shaped beryllium blank. Finally, the shaped beryllium blank is heat treated to obtain a shaped beryllium part.

[0052] The specific process of heat treatment in this embodiment is as follows:

[0053] The special-shaped beryllium blank was heated to 1170°C, kept at this temperature for 3.5 hours, then cooled to 535°C with electricity, and kept at this temperature for another 4 hours.

[0054] The special-shaped beryllium piece of this embodiment (refer to Figure 1 ) has a purity of 99.05%, a tensile strength of 542.0 MPa, a yield strength of 410.0 MPa, an elongation of 4.70%, and an elastic modulus of 307.8 GPa.

[0055] Example 2:

[0056] Step S1: designing and manufacturing an ST14 low-carbon steel sheath having the same shape and size as the special-shaped beryllium part to be prepared according to a 20% shrinkage amount.

[0057] Step S2: Use mechanical vibration to load the beryllium powder into the powder barrel, then seal the powder barrel with the powder loading port of the ST14 low-carbon steel ladle, and load the beryllium powder into the ST14 low-carbon steel ladle through the powder loading port.

[0058] Step S3: Put the ST14 low carbon steel ladle containing beryllium powder into the degassing furnace and -2 Pa and a temperature of 720 ° C, degassing treatment is carried out for 2.5 hours to obtain a beryllium blank. After the degassing treatment is completed, it is sealed and welded, and the material enters the next process after cooling.

[0059] Step S4: The degassed, sealed, and welded beryllium blank is placed in a hot isostatic press and heated to 1130°C at a pressure of 135 MPa. After holding for 4.5 hours, the temperature is reduced to 600°C after 8.5 hours, and the power is turned off. The blank is then cooled and removed from the furnace. The hot isostatically pressed beryllium blank is then placed in a pickling tank and pickled to remove the ST14 low-carbon steel sheath, resulting in a shaped beryllium blank. Finally, the shaped beryllium blank is heat treated to obtain a shaped beryllium part.

[0060] The specific process of heat treatment in this embodiment is as follows:

[0061] The special-shaped beryllium blank was heated to 1160°C, kept at this temperature for 4 hours, then cooled to 530°C with electricity, and kept at this temperature for another 4 hours.

[0062] The special-shaped beryllium piece of this embodiment has a purity of 99.01%, a tensile strength of 545.0 MPa, a yield strength of 413.0 MPa, an elongation of 4.50%, and an elastic modulus of 308.5 GPa.

[0063] Example 3:

[0064] Step S1: Design and manufacture a pancake-shaped beryllium piece (such as Figure 2 As shown, the ST14 low carbon steel sheath (Φ200×50mm) has the same shape and size.

[0065] Step S2: Use mechanical vibration to load the beryllium powder into the powder barrel, then seal the powder barrel with the powder loading port of the ST14 low-carbon steel ladle, and load the beryllium powder into the ST14 low-carbon steel ladle through the powder loading port.

[0066] Step S3: Put the ST14 low carbon steel ladle containing beryllium powder into the degassing furnace and -2 Pa and a temperature of 750 ° C, degassing treatment is carried out for 2 hours to obtain a beryllium blank. After the degassing treatment is completed, it is sealed and welded, and the material enters the next process after cooling.

[0067] Step S4: The degassed, sealed, and welded beryllium blank is placed in a hot isostatic press and heated to 1160°C at a pressure of 120 MPa. After holding for 3.5 hours, the temperature is reduced to 615°C after 9 hours, and the power is turned off. The hot isostatically pressed beryllium blank is then placed in a pickling tank and pickled to remove the ST14 low-carbon steel sheath, resulting in a pancake-shaped beryllium blank. Finally, the pancake-shaped beryllium blank is heat treated to obtain a pancake-shaped beryllium component.

[0068] The specific process of heat treatment in this embodiment is as follows:

[0069] The pancake-shaped beryllium blank was heated to 1180°C, kept at this temperature for 3 hours, then cooled to 525°C with electricity, and kept at this temperature for another 5 hours.

[0070] The pancake-shaped beryllium element of this embodiment (refer to Figure 2 ) has a purity of 98.91%, a tensile strength of 557.4 MPa, a yield strength of 462.0 MPa, an elongation of 4.89%, and an elastic modulus of 307.5 GPa.

[0071] Example 4:

[0072] Step S1: designing and manufacturing an ST14 low-carbon steel sheath having the same shape and size as the pancake-shaped beryllium piece to be prepared according to a 20% shrinkage amount.

[0073] Step S2: Use mechanical vibration to load the beryllium powder into the powder barrel, then seal the powder barrel with the powder loading port of the ST14 low-carbon steel ladle, and load the beryllium powder into the ST14 low-carbon steel ladle through the powder loading port.

[0074] Step S3: Put the ST14 low carbon steel ladle containing beryllium powder into the degassing furnace and -2 Pa and a temperature of 760 ° C, degassing treatment is carried out for 2 hours to obtain a beryllium blank. After the degassing treatment is completed, it is sealed and welded, and the material enters the next process after cooling.

[0075] Step S4: The degassed, sealed, and welded beryllium blank is placed in a hot isostatic press and heated to 1150°C at a pressure of 125 MPa. After holding for 4 hours, the temperature is reduced to 620°C after 9 hours, and the press is then powered off. The blank is then cooled and removed from the furnace. The hot isostatically pressed blank is then placed in a pickling tank and pickled to remove the ST14 low-carbon steel sheath, resulting in a pancake-shaped beryllium blank. Finally, the pancake-shaped beryllium blank is heat treated to obtain a pancake-shaped beryllium component.

[0076] The specific process of heat treatment in this embodiment is as follows:

[0077] The pancake-shaped beryllium billet was heated to 1190°C, kept at this temperature for 3 hours, then cooled to 540°C with electricity, and kept at this temperature for another 5 hours.

[0078] The pancake-shaped beryllium piece of this embodiment has a purity of 98.95%, a tensile strength of 584.0 MPa, a yield strength of 473.0 MPa, an elongation of 4.56%, and an elastic modulus of 309.1 GPa.

[0079] Example 5:

[0080] Step S1, design and manufacture a tubular beryllium piece (such as Figure 3 The shape and size of the ST14 low carbon steel sheath are the same as shown.

[0081] Step S2: Use mechanical vibration to load the beryllium powder into the powder barrel, then seal the powder barrel with the powder loading port of the ST14 low-carbon steel ladle, and load the beryllium powder into the ST14 low-carbon steel ladle through the powder loading port.

[0082] Step S3: Put the ST14 low carbon steel ladle containing beryllium powder into the degassing furnace and -2 Pa and a temperature of 710 ° C, degassing treatment is carried out for 3 hours to obtain a beryllium blank. After the degassing treatment is completed, it is sealed and welded, and the material enters the next process after cooling.

[0083] Step S4: The degassed, sealed, and welded beryllium blank is placed in a hot isostatic press and heated to 1110°C at a pressure of 140 MPa. After holding for 4.5 hours, the temperature is reduced to 590°C after 8 hours, and the power is turned off. The hot isostatically pressed beryllium blank is then placed in a pickling tank and pickled to remove the ST14 low-carbon steel sheath, resulting in a tubular beryllium blank. Finally, the tubular beryllium blank is heat treated to obtain a tubular beryllium part.

[0084] The specific process of heat treatment in this embodiment is as follows:

[0085] The tubular beryllium billet was heated to 1140°C, kept at this temperature for 5 hours, then cooled to 520°C with electricity, and kept at this temperature for another 4.5 hours.

[0086] The tubular beryllium member of this embodiment (refer to Figure 3 ) has a purity of 99.00%, a tensile strength of 584.0 MPa, a yield strength of 509.6 MPa, an elongation of 2.24%, and an elastic modulus of 311.0 GPa.

[0087] Example 6:

[0088] Step S1: designing and manufacturing an ST14 low-carbon steel sheath having the same shape and size as the tubular beryllium component to be prepared according to a 20% shrinkage amount.

[0089] Step S2: Use mechanical vibration to load the beryllium powder into the powder barrel, then seal the powder barrel with the powder loading port of the ST14 low-carbon steel ladle, and load the beryllium powder into the ST14 low-carbon steel ladle through the powder loading port.

[0090] Step S3: Put the ST14 low carbon steel ladle containing beryllium powder into the degassing furnace and -2 Pa and a temperature of 680 ° C, degassing treatment is carried out for 3 hours to obtain a beryllium blank. After the degassing treatment is completed, it is sealed and welded, and the material enters the next process after cooling.

[0091] Step S4: The degassed, sealed, and welded beryllium blank is placed in a hot isostatic press and heated to 1090°C at a pressure of 150 MPa. After holding for 5 hours, the temperature is reduced to 580°C after 8 hours, and the power is turned off. The hot isostatically pressed beryllium blank is then placed in a pickling tank and pickled to remove the ST14 low-carbon steel sheath, resulting in a tubular beryllium blank. Finally, the tubular beryllium blank is heat treated to obtain a tubular beryllium part.

[0092] The specific process of heat treatment in this embodiment is as follows:

[0093] The tubular beryllium billet was heated to 1150°C, kept at this temperature for 4.5 hours, then cooled to 510°C with electricity, and kept at this temperature for another 4.5 hours.

[0094] The tubular beryllium piece of this embodiment has a purity of 99.03%, a tensile strength of 575.0 MPa, a yield strength of 504.3 MPa, an elongation of 2.35%, and an elastic modulus of 309.0 GPa.

[0095] The above embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A method for direct hot isostatic pressing of beryllium powder, characterized in that: The beryllium powder direct hot isostatic pressing method comprises the following steps: Step S1, preparing a low-carbon steel sheath having the same shape and size as the formed beryllium part to be prepared; Step S2, placing beryllium powder into a low-carbon steel sheath and welding and sealing the sheath; Step S3, placing the welded and sealed low-carbon steel ladle set into a degassing furnace for degassing to obtain a beryllium billet; Step S4: subjecting the beryllium blank to hot isostatic pressing, pickling, and heat treatment in sequence to obtain a formed beryllium part.

2. The direct hot isostatic pressing method of beryllium powder according to claim 1, characterized in that: In step S3, the vacuum degree of the degassing treatment is 4×10 -2 ~5×10 -2 Pa, temperature is 680~760℃, and time is 2~3h.

3. The direct hot isostatic pressing method of beryllium powder according to claim 2, characterized in that: In the step S3, the temperature of the degassing treatment is 710-750°C.

4. The direct hot isostatic pressing method of beryllium powder according to any one of claims 1 to 3, characterized in that: In step S4, the specific process of the hot isostatic pressing treatment is: The beryllium billet is heated to 1090-1160°C under a pressure of 120-150 MPa, kept warm for 3-5 hours, and then cooled to 580-620°C after 8-9 hours, and then the power is turned off, and the billet is cooled and taken out of the furnace.

5. The direct hot isostatic pressing method of beryllium powder according to claim 4, characterized in that: In step S4, the hot isostatic pressing treatment is performed at a pressure of 130-140 MPa and a temperature of 1110-1150°C.

6. The direct hot isostatic pressing method of beryllium powder according to claim 5, characterized in that: In step S4, the specific process of the heat treatment is: The pickled beryllium blank is heated to 1140-1190°C, kept warm for 3-5 hours, then cooled to 510-540°C with power on, and kept warm for 4-5 hours.

7. The direct hot isostatic pressing method of beryllium powder according to claim 6, characterized in that: In step S4, the temperature of the heat treatment is 1150-1180°C.

8. The direct hot isostatic pressing method of beryllium powder according to claim 7, characterized in that: The shaped beryllium pieces are special-shaped beryllium pieces, pancake-shaped beryllium pieces and tubular beryllium pieces.

9. The direct hot isostatic pressing method of beryllium powder according to claim 8, characterized in that: The purity of the formed beryllium part is ≥98.50%, the tensile strength is ≥410.0 MPa, the yield strength is ≥310.0 MPa, the elongation is ≥1.50%, and the elastic modulus is ≥289.0 GPa.

10. The direct hot isostatic pressing method of beryllium powder according to claim 9, characterized in that: The formed beryllium part has a purity of 98.91-99.05%, a tensile strength of 542.0-584.0 MPa, a yield strength of 410.0-509.6 MPa, an elongation of 2.24-4.89%, and an elastic modulus of 307.5-311.0 GPa.

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