A kind of preparation method of uranium niobium molybdenum alloy

A niobium alloy, niobium-molybdenum technology, applied in the field of metal smelting and forming process and alloy preparation, can solve the problems of material loss and impurity increase, long cycle, complicated process, etc., to achieve increased superheat, high purity, dissolution and diffusion full effect

Active Publication Date: 2019-06-18
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the preparation of uranium-niobium-molybdenum alloy by vacuum induction melting or electric arc melting requires repeated melting, complex process, long cycle, and increased risk of material loss and impurity. , providing a preparation method of uranium-niobium-molybdenum alloy

Method used

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  • A kind of preparation method of uranium niobium molybdenum alloy
  • A kind of preparation method of uranium niobium molybdenum alloy
  • A kind of preparation method of uranium niobium molybdenum alloy

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Embodiment 1

[0050] The raw materials of uranium, niobium and molybdenum are prepared, the uranium metal is an ingot with a carbon content of ≤100μg / g, the niobium raw material is a wire with a purity greater than 99.9%, and the molybdenum raw material is a wire with a purity greater than 99.9%.

[0051] The operation steps of preparing U-5Nb-3Mo alloy are as follows:

[0052] (1) When batching, the weight ratio of niobium is 5.2wt.%. The uranium metal and niobium raw materials are cleaned and put into the electron beam melting furnace, and the combined furnace is vacuumed to 2*10 -2 Power transmission after Pa, preheating at 800°C for 6 minutes, then gradually raising the temperature to 2800°C to completely melt the uranium and niobium raw materials, then cooling down to 2550°C for 30 minutes, adjusting the scanning frequency of the electron beam to 10Hz, using circular wave scanning, Make the electron beam spot spirally move from the center of the water-cooled copper crucible to the edge...

Embodiment 2

[0056] The raw materials of uranium, niobium and molybdenum are prepared, the uranium metal is an ingot with a carbon content of ≤100μg / g, the niobium raw material is a rod with a purity greater than 99.9%, and the molybdenum raw material is a wire with a purity greater than 99.9%.

[0057] The operation steps of preparing U-4Nb-4Mo alloy are as follows:

[0058] (1) When batching, the weight ratio of niobium is 3.9wt.%. The uranium metal and niobium raw materials are cleaned and put into the electron beam melting furnace, and the combined furnace is vacuumed to 2*10 -2 Power transmission after Pa, preheat at 600°C for 6 minutes, then gradually increase the temperature to 3000°C to completely melt the uranium and niobium raw materials, then cool down to 2500°C for 25 minutes, adjust the scanning frequency of the electron beam to 10Hz, and use circular wave scanning. Make the electron beam spot spirally move from the center of the water-cooled copper crucible to the edge of the...

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Abstract

The invention discloses a preparation method of a uranium, niobium and molybdenum alloy. The preparation method aims at solving the problem that at present, the uranium, niobium and molybdenum alloy is prepared through the methods of vacuum induction melting or electric arc melting and the like, repeated smelting is needed, the process is complex, the period is long, and meanwhile, the risks of material losses and impurity increasing are increased. According to the preparation method, through the reasonable processes of electron beam smelting and ceramic crucible induction melting, solubilityand diffusion of alloy elements are more sufficient; the high effect is achieved through removal of impurities by means of electron beam high-temperature high vacuum overheating smelting, the better effect is achieved through control over inclusion in the alloy by means ceramic crucible smelting, and the obtained alloy purity degree is high. The component homogeneity of the alloy is good, the process period is short, two to three smelting processes are adopted, and therefore the high-quality uranium, niobium and molybdenum alloy can be obtained, and the industrial application need can be met.Meanwhile, the preparation method can be suitable for smelting preparation of other uranium alloys, and the preparation method also has certain universality in other similar materials.

Description

technical field [0001] The invention relates to the field of alloy preparation, in particular to the technical field of metal smelting and forming technology, and specifically relates to a method for preparing a uranium-niobium-molybdenum alloy. Background technique [0002] One of the key technical issues in the field of nuclear reactors is the selection and preparation of fuel materials. Metal-type nuclear fuels require good high-temperature mechanical properties and radiation resistance. In order to improve the characteristics of nuclear fuels, the preparation of alloys has become a better choice. Both uranium-molybdenum and uranium-niobium alloys are very important nuclear materials. The alloy formed by adding a small amount of elements such as zirconium, molybdenum, and niobium to uranium has good dimensional stability. [0003] Among them, the ternary alloy of uranium, niobium and molybdenum has important application prospects. The addition of a small amount of the thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C28/00C22C1/03
CPCC22C1/03C22C28/00
Inventor 陈道明曾钢苏斌刘泾源李文鹏阳家文
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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