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Preparation method of HP40 grade vacuum hot-pressing beryllium material and vacuum hot- pressing beryllium material

A technology of vacuum hot pressing and vacuum heat treatment, applied in the preparation of HP40 grade vacuum hot pressed beryllium material, and the field of HP40 vacuum hot pressed beryllium material, which can solve the problems of low elongation, poor strength and ductility, and low mechanical properties of beryllium material. , to achieve the effect of convenient operation, simple process, guaranteeing mechanical properties and ductility

Inactive Publication Date: 2020-02-28
西北稀有金属材料研究院宁夏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Beryllium is a rare metal with a high melting point and is easy to oxidize. It begins to oxidize when it exceeds 400°C in the air, and it oxidizes violently when it is 800°C. It is generally produced by powder metallurgy. Poor performance, low mechanical properties of beryllium material, tensile strength less than 400Mpa, low elongation less than 2

Method used

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  • Preparation method of HP40 grade vacuum hot-pressing beryllium material and vacuum hot- pressing beryllium material
  • Preparation method of HP40 grade vacuum hot-pressing beryllium material and vacuum hot- pressing beryllium material
  • Preparation method of HP40 grade vacuum hot-pressing beryllium material and vacuum hot- pressing beryllium material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1, using cold flow impact to prepare beryllium powder, the beryllium powder has a beryllium content of 99.8%, an iron content of 800ppm and an average particle size of 14 μm.

[0029] Step 2, preheating the isostatic graphite mold and drying it, then sequentially loading the beryllium powder and vacuum hot pressing to obtain a shaped beryllium blank.

[0030] Wherein, the preheating temperature is 200° C., and the drying time is 12 hours. Vacuum degree is 6×10 -2 Pa, the holding temperature is 1100°C, and the holding pressure is 20MPa / cm 2 , The heat preservation and pressure holding time is 8 hours.

[0031] Step 3, using a hydraulic press to eject the formed beryllium blank, that is, vacuum heat treatment after demoulding, to obtain a HP40 vacuum hot-pressed beryllium material. Vacuum degree is 6×10 -2 Pa, the holding temperature is 750°C, and the holding time is 30 hours.

[0032] The performance parameters of the HP40 grade vacuum hot-pressed beryllium mat...

Embodiment 2

[0035] Step 1, using cold flow impact to prepare beryllium powder, the beryllium powder has a beryllium content of 99.6%, an iron content of 700ppm and an average particle size of 9 μm.

[0036] Step 2, preheating the mold of isostatic graphite and C / C material and drying and then loading the beryllium powder and vacuum hot pressing to obtain the formed beryllium blank.

[0037] Wherein, the preheating temperature is 180° C., and the drying time is 12 hours. Vacuum degree is 3×10 -2 Pa, the holding temperature is 1150°C, and the holding pressure is 15MPa / cm 2 , The heat preservation and pressure holding time is 3 hours.

[0038] Step 3, using a hydraulic press to eject the formed beryllium blank, that is, vacuum heat treatment after demoulding, to obtain a HP40 vacuum hot-pressed beryllium material. Vacuum degree is 3×10 -2 Pa, the holding temperature is 650°C, and the holding time is 10 hours.

[0039] The performance parameters of the HP40 grade vacuum hot-pressed beryl...

Embodiment 3

[0042] Step 1, using cold flow impact to prepare beryllium powder, the beryllium powder has a beryllium content of 99.5%, an iron content of 750ppm and an average particle size of 6 μm.

[0043] Step 2, preheating the mold of isostatic graphite and C / C material and drying and then loading the beryllium powder and vacuum hot pressing to obtain the formed beryllium blank.

[0044] Wherein, the preheating temperature is 220° C., and the drying time is 20 hours. The vacuum degree is 4×10 -2 Pa, the holding temperature is 1190°C, and the holding pressure is 18MPa / cm 2 , The heat preservation and pressure holding time is 6 hours.

[0045] Step 3, using a hydraulic press to eject the formed beryllium blank, that is, vacuum heat treatment after demoulding, to obtain a HP40 vacuum hot-pressed beryllium material. The vacuum degree is 4×10 -2 Pa, the holding temperature is 700°C, and the holding time is 20 hours.

[0046] The performance parameters of the HP40 grade vacuum hot-press...

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Abstract

The invention discloses a preparation method of an HP40 grade vacuum hot-pressing beryllium material. The preparation method includes the following steps that 1, beryllium powder with the beryllium content greater than 99.5%, the iron content less than 800 ppm, and an average particle size of 6-14 [mu]m is prepared; 2, a mold is preheated and dried, and then the beryllium powder is filled in sequence, vacuum hot-pressing treatment is conduced, and a shaped beryllium billet is obtained; 3, the shaped beryllium billet is removed from the mold and then subjected to a vacuum heat treatment to obtain the HP40 grade vacuum hot-pressing beryllium material. The invention further discloses the HP40 grade vacuum hot-pressing beryllium material. The HP40 grade vacuum hot-pressing beryllium material has a tensile strength greater than 400 MPa and an elongation rate greater than 3%.

Description

technical field [0001] The invention belongs to the technical field of hot-pressed beryllium material preparation, and relates to a preparation method of HP40 vacuum hot-pressed beryllium material and HP40 vacuum hot-pressed beryllium material. Background technique [0002] Beryllium is a rare metal with a high melting point and is easy to oxidize. It begins to oxidize when it exceeds 400°C in the air, and it oxidizes violently when it is 800°C. It is generally produced by powder metallurgy. Poor performance, low mechanical properties of beryllium material, tensile strength less than 400Mpa, low elongation less than 2. Contents of the invention [0003] One of purpose of the present invention, is to provide a kind of preparation method of HP40 grade vacuum hot pressing beryllium material, the tensile strength height and elongation of the beryllium material prepared by this method are large. [0004] The second object of the present invention is to provide a HP40 vacuum ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/14B22F3/24
CPCB22F3/14B22F3/24B22F2003/248B22F1/05
Inventor 乔鹏王战宏钟景明李志年邵伟张鹏翔王蓓马琨周凯
Owner 西北稀有金属材料研究院宁夏有限公司
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