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U-10Zr alloy smelting technology

A u-10wt.%zr alloy technology, applied in the field of U-10Zr alloy smelting process

Active Publication Date: 2017-07-07
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there is no U-10%wtZr alloy smelting and forming process specially used to solve the problem of metal-type fuel element core blank preparation, and relevant research is urgently needed

Method used

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  • U-10Zr alloy smelting technology
  • U-10Zr alloy smelting technology
  • U-10Zr alloy smelting technology

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0026] A kind of U-10Zr alloy smelting process of the present invention comprises the following steps:

[0027] (1) Preparation of master alloy.

[0028] Prepare U and Zr in an equal weight ratio, and repeatedly smelt the alloy for 5 to 8 times in a non-consumable electric arc furnace to prepare a U-50wt.% Zr master alloy with Zr as the matrix and uranium solid-dissolved in the matrix;

[0029] figure 2 The metallographic phase of the U-50wt.% Zr master alloy smelted 8 times, the sample was polished, and there was no undissolved matter in the sample. The black needle-like structure in the figure is the second phase, and the distribution is uniform. image 3 It is the XRD pattern of the sample U-50wt.%Zr, which is analyzed as the second phase UZr 2 .

[0030] In this example, the main technical indic...

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Abstract

The invention belongs to the technical field of metal mold alloy smelting and forming technologies, and particularly relates to a U-10Zr alloy smelting technology. The U-10Zr alloy smelting technology comprises the following steps: (1) a U-Zr intermediate alloy with the Zr content being 50wt.% is prepared; (2) a U-Zr intermediate alloy with the Zr content being 10wt.% is prepared since by employing a medium-frequency induction furnace, the U-Zr intermediate alloy with the Zr content being 50wt.% and depleted uranium are subjected to induction melting in a CaO ceramic crucible, the vacuum degree of the medium-frequency induction furnace is controlled to be less than 10<-1>Pa, and the smelting temperature is controlled at 1500-1600 DEG C; and (3) the U-Zr intermediate alloy with the Zr content being 10wt.% is cast since the U-Zr alloy obtained in the step (2) is put in the medium-frequency induction furnace and is cast in a graphite crucible uphill casting manner, a casting cup is arranged at the bottom of the graphite crucible, a ceramic foam filter is arranged between the casting cup and a mould, and the U-Zr intermediate alloy with the Zr content being 10wt.% and impurities being removed is obtained through the casting in this step. Through the technical scheme, the preparation quality of the U-Zr intermediate alloy with the Zr content being 10wt.% for a metal mold combustible metal core blank can be ensured, and favorable technology and equipment supports are provided for batch production of metal fuel elements.

Description

technical field [0001] The invention belongs to the technical field of metal type alloy melting and forming technology, and in particular relates to a U-10Zr alloy melting technology. Background technique [0002] The core material in the metal-type element of the fast reactor conversion zone is uranium-zirconium alloy, among which U-10%Zr alloy. Among the fast reactor metal fuels, uranium-zirconium alloys have the best properties, and the alloys with a zirconium content of 10wt.% have good thermal conductivity, high fissile atomic density, and low Zr thermal neutron cross-section. With excellent corrosion resistance and dimensional stability, it is considered a promising nuclear fuel for metal block neutron value-added reactors. At the same time, this new fuel can allow the reactor to operate at a higher output power and extend the operating cycle, thereby improving economics, safety and fuel performance. [0003] However, there is no U-10%wtZr alloy smelting and forming ...

Claims

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Application Information

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IPC IPC(8): C22C28/00C22C1/03
CPCC22C1/03C22C28/00
Inventor 白志勇韩小军杨哲陈超康泰峰孟剑雄郭洪赵瑞瑞
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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