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Preparation apparatus of graphite metal wrap for thermal isostatic pressing

A technology of metal cladding and preparation device, which is applied in the field of preparation of high-performance graphite sealing materials, can solve the problems of waste products, cladding cracking, etc., and achieve the effects of reducing manufacturing cost, reducing cracking, and narrowing gaps

Inactive Publication Date: 2009-06-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, because the expansion coefficient of metallic silver is much greater than that of graphite, if the thickness of the silver sheath is too thick, the sheath will crack and waste products will appear.

Method used

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  • Preparation apparatus of graphite metal wrap for thermal isostatic pressing
  • Preparation apparatus of graphite metal wrap for thermal isostatic pressing

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Embodiment Construction

[0018] The present invention uniformly coats metal on the graphite surface by casting method before hot isostatic pressing to form a closed graphite metal sheath, and the coating metal can be silver, copper, aluminum or babbitt alloy and the like.

[0019] Taking the outer surface of a graphite column coated with metallic silver as an example, before the hot isostatic pressing treatment, the cylindrical graphite to be impregnated with silver (hereinafter referred to as the graphite column) is placed in the center of the bottom of the graphite crucible by axial fixing and radial fixing methods, and cast Metal silver, coating the outer surface of the graphite column with metal silver to prepare a closed silver sheath. Such as figure 1 As shown, the graphite to be impregnated with silver is processed into a cylinder, a graphite column I1 has a cylindrical boss on one side, and a cylindrical concave hole of the same size on the other side; another graphite column II2 has cylindric...

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Abstract

The invention relates to technology for preparing a high-performance graphite sealing material, in particular to a device for preparing a graphite metal clad for hot isostatic pressing. The device is provided with a graphite column, a metal bar, a graphite gasket, a metal gasket, a graphite crucible cover, a graphite crucible and a pouring gate, wherein the graphite column is arranged in the graphite crucible; the lower surface of the graphite column is contacted with the bottom of the graphite crucible through the metal gasket; gaps for filling metal are reserved on the upper surface and lateral sides of the graphite column; the metal bar is inserted between the upper surface of the graphite column and the graphite crucible cover arranged on the top of the graphite crucible; the graphite gasket is arranged on the upper surface of the graphite column; the upper surface of the graphite gasket is provided with the metal bar; and the graphite crucible cover is provided with the pouring gate. In the device, the metal graphite to be steeped is placed in the center of the bottom of the graphite crucible by axial fixation and radial fixation methods, so as to reduce immersion allowance of metal silver and manufacturing cost.

Description

Technical field: [0001] The invention relates to a preparation technology of a high-performance graphite sealing material, in particular to a preparation device for a graphite metal sheath for hot isostatic pressing. Background technique: [0002] Silver-impregnated graphite material has the advantages of high density, high strength, wear resistance, especially good thermal conductivity, electrical conductivity and sealing performance, and has been applied in many fields such as national defense, electronics, and machinery. But because silver is a precious metal, hot isostatic pressing treatment is required in the preparation process, making its manufacturing cost very high. Therefore, it is particularly important to improve production efficiency, improve yield and reduce silver consumption. [0003] The manufacture of silver-impregnated graphite requires hot isostatic pressing to allow molten metallic silver to penetrate evenly into the pores of the graphite material. Befo...

Claims

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Application Information

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IPC IPC(8): C04B41/51
Inventor 白朔徐红军成会明杜海峰巴力学周序科罗川吴俊峰赵金福周金玉
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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