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One-step method for preparing high-density WRe/TZM gradient composite material

A composite material and dense technology, applied in X-ray tube parts, X-ray tube electrodes, etc., can solve the problems of high cost, complicated process, and difficulty in meeting the density requirements, and achieve high bonding strength and hardness, and process Simple, short sintering time effect

Active Publication Date: 2019-04-09
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent 106531599A "A Tungsten-Rhenium-Molybdenum Alloy Rotating Anode Target for X-ray Tubes and Its Preparation Method" discloses that tungsten-rhenium pre-alloyed powder and molybdenum alloy powder are used as raw materials, through molding, high temperature sintering, hot isostatic pressing, straightening The anode target material is prepared by processes such as straightening and shaping, but the process is complex, the cost is high, and the density is difficult to meet the requirements
In foreign countries, powder metallurgy plus forging is often used to prepare WRe / TZM composite materials, and the density can meet the requirements of target materials, but the process is relatively complicated and the cost is high

Method used

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  • One-step method for preparing high-density WRe/TZM gradient composite material

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Experimental program
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Effect test

Embodiment 1

[0033] The present embodiment manufactures the WRe / TZM gradient composite material for the X-ray tube of a CT machine as follows:

[0034] (1) Take WRe alloy powder and TZM alloy powder as raw materials as required;

[0035](2) First install the lower pressure head on the concave die of the gradient mold, then load TZM alloy powder, and use a manual hydraulic press to pre-press with a pressure of 10 MPa. After holding the pressure for 2 minutes, load WRe alloy powder, and also use 10 MPa for pre-pressing. , and finally put it into the upper indenter; add a layer of 0.2mm thick graphite paper between the sample and the mold and the indenter to prevent the sample from reacting with graphite and facilitate demoulding;

[0036] (3) Wrap a layer of 5mm thick carbon felt on the gradient mold after the raw materials are installed, and then put it into the SPS furnace cavity for sintering connection to obtain the WRe / TZM gradient composite material;

[0037] The sintering connection ...

Embodiment 2

[0041] The present embodiment manufactures the WRe / TZM gradient composite material for the X-ray tube of a CT machine as follows:

[0042] (1) Take WRe alloy powder and TZM alloy powder as raw materials as required;

[0043] (2) First install the lower pressure head on the concave die of the gradient mold, then load TZM alloy powder, and use a manual hydraulic press to pre-press with a pressure of 10 MPa. After holding the pressure for 2 minutes, load WRe alloy powder, and also use 10 MPa for pre-pressing. , and finally put it into the upper indenter; add a layer of 0.2mm thick graphite paper between the sample and the mold and the indenter to prevent the sample from reacting with graphite and facilitate demoulding;

[0044] (3) Wrap a layer of 5mm thick carbon felt on the gradient mold after the raw materials are installed, and then put it into the SPS furnace cavity for sintering connection to obtain the WRe / TZM gradient composite material;

[0045] The process of sintering...

Embodiment 3

[0049] The present embodiment manufactures the WRe / TZM gradient composite material for the X-ray tube of a CT machine as follows:

[0050] (1) Take WRe alloy powder and TZM alloy powder as raw materials as required;

[0051] (2) First install the lower pressure head on the concave die of the gradient mold, then load TZM alloy powder, and use a manual hydraulic press to pre-press with a pressure of 10 MPa. After holding the pressure for 2 minutes, load WRe alloy powder, and also use 10 MPa for pre-pressing. , and finally put it into the upper indenter; add a layer of 0.2mm thick graphite paper between the sample and the mold and the indenter to prevent the sample from reacting with graphite and facilitate demoulding;

[0052] (3) Wrap a layer of 5mm thick carbon felt on the outside of the gradient mold after pre-pressing, and then put it into the SPS furnace cavity for sintering connection to obtain the WRe / TZM gradient composite material;

[0053] The process of sintering con...

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Abstract

The invention discloses a one-step method for preparing a high-density WRe / TZM gradient composite material. The method comprises the following steps that 5% WRe alloy powder and TZM alloy powder are taken as raw materials, the TZM alloy powder and the WRe alloy powder are loaded into a specially designed gradient mold according to the sequence that the TZM alloy powder is located at the lower partand the WRe alloy powder is located at the upper part, then SPS sintering connection is carried out, and the WRe / TZM gradient composite material is obtained at one time. The obtained WRe / TZM gradientcomposite material prepared by the method is high in density, uniform in connecting surface diffusion and excellent in hardness and shearing strength.

Description

technical field [0001] The invention relates to a method for manufacturing a WRe / TZM gradient composite material, in particular to a method for preparing a high-density and high-performance WRe / TZM gradient composite material in one step. Background technique [0002] WRe alloy is an alloy composed of W and Re. W has high melting point, high temperature strength, good heat dissipation performance, and high atomic number. It can excite strong X-rays under electron bombardment, but W has a notch sensitive effect, which is easy to cause cracks. Recrystallization temperature of Re is 500°C higher than that of W, and Re has no plastic-brittle transition temperature. Therefore, the addition of Re can significantly improve the room temperature brittleness of W, reduce the plastic-brittle transition temperature, and enhance the mechanical properties of W in a certain high temperature region. With the rapid development of the national defense industry and the national economy, WRe a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/02B22F3/105B22F5/00H01J35/10
CPCB22F3/105B22F5/00B22F7/02B22F2003/1051B22F2207/01H01J35/10
Inventor 张久兴韩翠柳潘亚飞沈学峰杨新宇张凡高
Owner HEFEI UNIV OF TECH
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