Quasi-hot isostatic pressing diffusion connecting mechanism and method

A technology of diffusion joining and isostatic pressing, applied in cleaning methods and utensils, chemical instruments and methods, cleaning methods using liquids, etc. Small, high productivity, uniform heating effect

Inactive Publication Date: 2009-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of expanding the indenter into a high-precision flat plate in order to solve the traditional diffusion connection, and the single axial pressure is easy to make the component thicker, it is difficult to control the connection accuracy, and the uneven heating of different regions of

Method used

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  • Quasi-hot isostatic pressing diffusion connecting mechanism and method
  • Quasi-hot isostatic pressing diffusion connecting mechanism and method
  • Quasi-hot isostatic pressing diffusion connecting mechanism and method

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specific Embodiment approach 1

[0008] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment includes cylinder body 1, top slider 2, bottom slider 3 and powder 4, bottom slider 3 is arranged at the lower end of cylinder body 1, top slider 2 is arranged at the upper end of cylinder body 1 and At least half of the upper end of the top slider 2 is exposed outside the upper end surface of the cylinder 1 , and the inner cavity of the cylinder 1 is filled with powder 4 . Powder particles are used as the pressurized medium to replace the liquid or gas pressurization of the hot isostatic press, so as to assist the corresponding device on the ordinary diffusion welding machine to use the powder flow to apply equal pressure and realize the precise connection of components. The size of the cylinder body 1 is determined according to the size of the inner cavity of the diffusion welding machine; when in use, first place the bottom slider in the cylinder body 1, then put a certain a...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination figure 1 The present embodiment will be described. The materials of the cylinder body 1 , the top slider 2 and the bottom slider 3 in this embodiment are superalloys. The high-temperature alloy can guarantee the strength of the device during the connection process; under the conditions of the connection pressure and temperature required by the components to be connected, the material of the cylinder 1, the top slider 2 and the bottom slider 3 can be selected from high-strength graphite to save costs.

specific Embodiment approach 3

[0010] Specific implementation mode three: combination figure 1 Describe this embodiment, the quasi-hot isostatic pressure diffusion connection method of this embodiment is realized through the following steps: 1. Surface finishing and ultrasonic cleaning of the two components to be connected; 2. The two components to be connected in step 1 The surfaces of the components are relatively superimposed, and the side surfaces after the butt joint are covered with 50-100 μm metal foil (this is to prevent the powder 4 from penetrating into the surface to be connected under pressure), and the metal foil is wound with a metal wire to fix it. Embed in the powder 4 in the inner cavity of the cylinder body 1; 3. Put the quasi-hot isostatic pressure diffusion connection device equipped with the components to be connected into the furnace of the diffusion welding machine, and the pressure head on the welding machine directly acts on the top slider 2 First, the connection temperature is 0.5...

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Abstract

The invention discloses a standard hot isostatic pressing diffusion bonding device and a method thereof, and relates to a diffusion bonding device and a method. The invention aims to solve the problems that the bonding precision of the conventional diffusion bonding is not easy to control, and the prior hot isostatic pressing diffusion bonding needs to be completed on hot isostatic pressing equipment. In the device, a top sliding block and a bottom sliding block are arranged at the upper end and the lower end of a cylinder respectively, and an inner cavity of the cylinder is filled with powder. The method comprises that: the surfaces of members to be bonded are subjected to finish machining and ultrasonic cleaning; the surfaces to be bonded are overlapped oppositely, the butted side surface is covered with a 50 to 100 mu m metal foil, and the members are fixed by winding metal wires on the metal foil and then buried into the powder of the inner cavity of the cylinder; the device is put into a furnace hearth of a diffusion welding machine, and a pressure head on the welding machine directly acts on the top sliding block; and the members are heated, insulated and cooled to room temperature. The invention adopts the flowing powder as a pressurizing medium to replace single axial pressurization, and the members are uniformly heated and have little deformation; and a common diffusion welding machine can realize hot isostatic pressing precision diffusion bonding of complicated members.

Description

technical field [0001] The invention relates to a diffusion connection device and method. Background technique [0002] The traditional diffusion connection is a precise connection method, which refers to the surfaces that are in contact with each other. At high temperature, the axial pressure is used to make the connected surfaces close to each other, and the local plastic deformation occurs. After a certain period of time, the atoms in the bonding layer diffuse each other to form a whole. Reliable connection, in order to successfully connect multiple sets of precision components at one time, it is necessary to expand the indenter 7 to a flat plate 8, see figure 2 , and the flatness of the surface of the flat plate is high, the uneven heating of different areas of the components is easy to cause internal stress to cause post-weld deformation, and the single axial pressure is easy to cause deformation of the components (thickening), and it is difficult to achieve precise con...

Claims

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Application Information

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IPC IPC(8): B23K20/00B08B3/12
Inventor 曹健崔红军冯吉才何鹏李卓然张丽霞
Owner HARBIN INST OF TECH
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