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A tungsten-based material with both solid solution and dispersion strengthening and its preparation method

A dispersion-strengthening, tungsten-based technology, which is applied in the field of both solid solution and dispersion-strengthened tungsten-based materials and its preparation, can solve the problems of material performance degradation, low Zr diffusion/solution efficiency, grain boundary segregation, etc., to reduce Production cost, improvement of strengthening and toughening effects, improvement of yield and production efficiency

Active Publication Date: 2022-03-29
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a tungsten-based material with both solid solution and dispersion double strengthening effects and its preparation method to solve the problem of low Zr diffusion / solution efficiency and ZrO 2 Grain boundary segregation and the resulting degradation of material properties

Method used

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  • A tungsten-based material with both solid solution and dispersion strengthening and its preparation method
  • A tungsten-based material with both solid solution and dispersion strengthening and its preparation method
  • A tungsten-based material with both solid solution and dispersion strengthening and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 (W 99 Zr 1 ) 99.7 Fe 0.3 Alloy preparation

[0021] Step one, Zr 76 Fe 24 Preparation of Master Alloy Amorphous Powder

[0022] Using industrially pure Zr (>99.5%) and Fe (>99.5%) metals as raw materials, the composition of Zr by atomic percentage 76 Fe 24 Conversion, weighing, and alloy preparation; the raw materials are mixed and placed in a water-cooled copper crucible of a non-consumable arc melting furnace, and then vacuumed to about 6×10 -3 Pa, filled with 0.05MPa industrial pure Ar atmosphere for smelting, the arc melting working current is 150A; then the alloy ingot is turned upside down, so repeated smelting 4 times to obtain an alloy ingot with uniform composition. Next, crush the alloy ingot and put it into a quartz tube, place the quartz tube in an induction heating coil, and then evacuate to about 1×10 -2 Pa, filled with 0.05MPa commercially pure Ar; using copper roll single roll spin quenching technology, the alloy sample is melted an...

Embodiment 2

[0026] Embodiment 2 (W 95 Zr 5 ) 99.1 Fe 0.9 Alloy preparation

[0027] Step one, Zr 85 Fe 15 Preparation of Master Alloy Amorphous Powder

[0028] Using industrial pure Zr (>99.5%) and Fe (>99.5%) as raw materials, the composition of Zr by atomic percentage 85 Fe 15 Conversion, weighing, and alloy preparation; the raw materials are mixed and placed in a water-cooled copper crucible of a non-consumable arc melting furnace, and then vacuumed to about 6×10 -3 , filled with industrial pure Ar atmosphere of 0.1MPa for smelting, the working current of arc melting is 180A; then the alloy ingot is turned upside down, and the alloy ingot with uniform composition is obtained by repeated melting for 4 times. Next, crush the alloy ingot and put it into a quartz tube, place the quartz tube in an induction heating coil, and then evacuate to about 1×10 -2 Pa, filled with 0.1MPa commercially pure Ar; using copper roll single roll spin quenching technology, the alloy sample is melted...

Embodiment 3

[0032] Embodiment 3 (W 92 Zr 8 ) 97 Fe 3 Alloy preparation

[0033] Step one, Zr 72 Fe 28 Preparation of Master Alloy Amorphous Powder

[0034] Using industrial pure Zr (>99.5%) and Fe (>99.5%) as raw materials, the composition of Zr by atomic percentage 72 Fe 28 Conversion, weighing, and alloy preparation; the raw materials are mixed and placed in a water-cooled copper crucible of a non-consumable arc melting furnace, and then vacuumed to about 6×10 -3 , filled with industrial pure Ar atmosphere of 0.1MPa for smelting, the working current of arc smelting is 150A; then the alloy ingot is turned upside down, and smelting is repeated 4 times in this way to obtain an alloy ingot with uniform composition. Next, crush the alloy ingot and put it into a quartz tube, place the quartz tube in an induction heating coil, and then evacuate to about 1×10 -2 Pa, filled with 0.1MPa commercially pure Ar; using copper roll single roll spin quenching technology, the alloy sample is mel...

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Abstract

A tungsten-based material with both solid solution and dispersion strengthening and a preparation method thereof belong to the technical field of powder preparation engineering. The preparation method uses industrially pure W powder and Zr and M metals as raw materials. First, ZrM amorphous strips are obtained by arc melting and strip quenching technology; Mixing and preparing materials; finally, the materials are ball milled, pressed and sintered to obtain blocks (W 100‑a Zr a ) 100‑b m b Tungsten-based materials. The tungsten-based material includes W, Zr and M elements, wherein M is one of Fe, Co and Ni elements, a and b are atomic percentages, and their values ​​are 0.5≤a≤8, 0<b≤3. The invention can fully fill the gap between W powder particles to obtain a high-density sintered body of tungsten-based materials; the obtained product has both solid solution and dispersion double strengthening characteristics; it is beneficial to improve the strengthening and toughening effect of tungsten-based materials, and greatly broadens the The preparation of materials controls process parameters, which helps to reduce material production costs and improve material yield and production efficiency.

Description

technical field [0001] The invention relates to a tungsten-based material with both solid solution and dispersion strengthening and a preparation method thereof, belonging to the technical field of powder preparation engineering. Background technique [0002] Because of its high melting point (3410°C), high creep resistance, high sputtering threshold, low tritium retention, and low thermal expansion coefficient, tungsten (W) and its alloys have been widely used in aerospace, nuclear energy engineering and other fields. . For example, W may serve as a divertor and first wall member for a magnetic confinement fusion device facing the plasma material. The ductile-brittle transition temperature of pure W is higher than room temperature, which is not conducive to component processing, and its recrystallization temperature cannot fully meet the high-temperature service requirements, which largely limits the application range of pure W. [0003] Studies have shown that the segreg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C1/10C22C32/00C22C45/10B22D11/06B22F9/04B22F3/105
CPCC22C27/04C22C32/0031C22C45/10B22D11/0611B22F9/04C22C1/10B22F3/105B22F3/1039B22F2009/043
Inventor 王英敏羌建兵杨兵魏明玉
Owner DALIAN UNIV OF TECH
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