Tungsten-rhenium-molybdenum alloy rotary anode target material for X-ray tube and preparation method thereof

A technology of X-ray tube and rotating anode, which is applied in the direction of X-ray tube electrodes, X-ray tubes, X-ray tube parts, etc., can solve the problems of low sintering density, many forging passes, high cost, etc., and achieve the content of impurity elements Low, increase the connection strength, the effect of high pass rate

Active Publication Date: 2017-03-22
安泰天龙钨钼科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the introduction of "Rare Metals and Cemented Carbide" 1987 Z1 Issue "Overview of Rotating Anode Targets for X-ray Tubes Abroad", there are three main processes for producing target discs: one is powder metallurgy, that is, in metal molds, according to According to the shape and requirements of the designed target, various powders are filled in layers, and then pressed and sintered by a certain process; this method has a simple process, but the sintered density is low
The second production process is to use powder metallurgy to prepare tungsten-rhenium-molybdenum alloy sintered blanks. After 3-4 times of forging, the product is prepared by mechanical processing. This process has many forging passes, and the local area of ​​the product is prone to stress. Concentration causes cracks, so the efficiency is low and the cost is high
The third production process is the process of vapor deposition of tungsten-rhenium alloy on the molybdenum alloy substrate. The disadvantage of this process is that the density of the tungsten-rhenium layer is low, and the bonding strength with t

Method used

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  • Tungsten-rhenium-molybdenum alloy rotary anode target material for X-ray tube and preparation method thereof
  • Tungsten-rhenium-molybdenum alloy rotary anode target material for X-ray tube and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] (1) Preparation of tungsten-rhenium pre-alloyed powder: Weigh respectively 238g of tungsten powder with a Fibonacci particle size of 3.0 μm and a purity of 99.95% and 18g of ammonium rhenate powder with a purity of 99.99% after grinding and passing through a 200 mesh sieve, and then mix the rhenium Add the ammonium acid powder into a mixer equipped with tungsten powder for mixing, the speed is 20r / min, and the mixing time is 1 hour; after mixing evenly, carry out the first hydrogen reduction treatment, that is, react at 420°C for 0.5 hours; then carry out The second hydrogen reduction treatment was to react at 850° C. for 0.5 hours. After the reduction reaction is completed, 250g of rhenium-tungsten pre-alloyed powder is obtained, that is, 5Re-W powder (the mass fraction of rhenium in the tungsten-rhenium pre-alloyed powder is 5%).

[0038] (2) Preparation of molybdenum alloy powder: Weigh 740g of molybdenum powder with a Fischer particle size of 4.0 μm and a purity of ...

Embodiment 2

[0047](1) Preparation of tungsten-rhenium pre-alloyed powder: take respectively 270 g of tungsten powder with a Fibonacci particle size of 4.0 μm and a purity of 99.95% and 43.5 g of ammonium rhenate powder with a purity of 99.99% after grinding and passing through a 200 mesh sieve, and then Add the ammonium rhenate powder into a mixer equipped with tungsten powder for mixing, the rotation speed is 15r / min, and the mixing time is 1 hour; after mixing evenly, carry out the first hydrogen reduction treatment, that is, react at 350°C for 1 hour, and then Carry out the second hydrogen reduction treatment, that is, react at 900°C for 0.5 hours. After the reduction reaction is completed, 300g of rhenium-tungsten pre-alloyed powder is obtained, that is, 10Re-W powder (the mass fraction of rhenium in the tungsten-rhenium pre-alloyed powder is 10%).

[0048] (2) Preparation of molybdenum alloy powder: take by weighing 885g of molybdenum powder with a Fibonacci particle size of 2.0 μm a...

Embodiment 3

[0057] (1) Preparation of tungsten-rhenium pre-alloyed powder: take respectively 247.5g of tungsten powder with a Fibonacci particle size of 2.0 μm and a purity of 99.95% and 3.6g of ammonium rhenate powder with a purity of 99.99% after grinding and grinding. Add the ammonium rhenate powder into a mixer equipped with tungsten powder for mixing, the rotation speed is 15r / min, and the mixing time is 2 hours; after mixing evenly, carry out the first hydrogen reduction treatment, that is, react at 500°C for 0.5 hours; Then carry out the second hydrogen reduction treatment, that is, react at 800° C. for 1 hour. After the reduction reaction is completed, 250g of rhenium-tungsten pre-alloyed powder is obtained, that is, 1Re-W powder (the mass fraction of rhenium in the tungsten-rhenium pre-alloyed powder is 1%).

[0058] (2) Preparation of molybdenum alloy powder: Weigh 695.5g of molybdenum powder with a Fischer particle size of 5.0 μm and a purity of 99.95%; TiH with a particle size...

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Abstract

The invention relates to a tungsten-rhenium-molybdenum alloy rotary anode target material for an X-ray tube and a preparation method thereof, wherein the target material relates to the technical field of powder metallurgy. The tungsten-rhenium-molybdenum alloy rotary anode target material for the X-ray tube comprises a tungsten-rhenium alloy layer and a molybdenum alloy layer. Tungsten-rhenium pre-alloy powder and molybdenum alloy powder are used as raw materials. The tungsten-rhenium-molybdenum alloy rotary anode target material is prepared through the steps of a compression molding step, a high-temperature sintering step, a hot isostatic pressing step, a straightening shaping step and a machining step, wherein the compression molding step, the high-temperature sintering step, the hot isostatic pressing step, the straightening shaping step and the machining step are successively performed. The tungsten-rhenium-molybdenum alloy prepared by the invention has excellent performances of small crystal grain, uniform tissue, relatively low impurity element content, high compactness, high strength, etc. The rotary anode target prepared by the tungsten-rhenium-molybdenum alloy for the X-ray tube has advantages of high product qualified rate, high heat dissipation performance, high heat impact resistance, long service life, etc.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and relates to a tungsten-rhenium-molybdenum alloy rotating anode target material for an X-ray tube and a preparation method thereof. Background technique [0002] The X-ray tube is the core of all X-ray instruments. The performance of the X-ray instrument depends largely on the quality of the X-ray tube; the anode target is an important part of the X-ray tube, which directly affects the X-ray emission intensity and pipe life. [0003] With the development of X-ray detection technology, rotating target X-ray tubes with large heat capacity and strong X-ray output are widely used in the field of medical diagnosis in order to withstand continuous load or instantaneous high load input. When modern X-ray tubes with strong power output are working, they apply a high voltage of up to 200KV to the electrons escaping from the incandescent filament. Under the action of high voltage, the escaped...

Claims

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Application Information

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IPC IPC(8): H01J35/24H01J35/10B22F1/00B22F3/02B22F3/10B22F3/15B22F3/24C22C27/04B22F5/00
CPCB22F1/0003B22F3/02B22F3/1007B22F3/15B22F3/24B22F2998/10C22C27/04H01J35/10H01J35/24
Inventor 董帝刘国辉吕周晋王寅
Owner 安泰天龙钨钼科技有限公司
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