Preparing method for U-Mo-Zr alloy

A technology of alloy and alloy ingot, which is applied in the field of U-Mo-Zr alloy preparation, can solve the problems of material loss and impurity increase, and long process cycle, so as to improve alloy uniformity, high alloy purity, and increase melting temperature and the effect of smelting time

Active Publication Date: 2018-02-23
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to: for the preparation of uranium-molybdenum-zirconium ternary alloys by methods such as vacuum induction melting or arc melting, multiple repeated meltings are required, which not only has a long process cycle, but also increases the risk of material loss and impurities. Problem, provide a kind of preparation method of U-Mo-Zr alloy

Method used

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  • Preparing method for U-Mo-Zr alloy
  • Preparing method for U-Mo-Zr alloy
  • Preparing method for U-Mo-Zr alloy

Examples

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Embodiment 1

[0054] Example 1 Preparation of U-8Mo-2Zr alloy

[0055] (1) U-8Mo alloy is prepared by one-time alloying with graphite crucible

[0056] The inner surface of the graphite crucible and the outer surface of the graphite sieve plate and the mesh holes are all plasma sprayed with calcium zirconate coating. Such as figure 1 As shown, the proportion of molybdenum raw material is adjusted to 8.3wt.%, and the molybdenum wire is placed under the graphite sieve plate, and the uranium ingot is placed on the graphite sieve plate. The sieve diameter of the graphite sieve plate is 5mm, and the center line of adjacent sieve holes The distance between them is 10mm, the sieve holes are evenly distributed, and the thickness of the sieve plate is 8mm. After the raw materials are placed, vacuum the furnace to 5*10 -2 After Pa, power is supplied, after the material is completely melted, the temperature is kept at 1500°C for 30min, and the temperature is reduced to 1200°C at a rate of 10°C / min, then t...

Embodiment 2

[0061] Example 2 Preparation of U-2Mo-8Zr alloy

[0062] (1) U-2Mo alloy is prepared by one-time alloying with graphite crucible

[0063] The inner surface of the graphite crucible and the outer surface of the graphite sieve plate and the mesh holes are all plasma sprayed with calcium zirconate coating. Such as figure 1 As shown, the proportion of molybdenum raw material is adjusted to 2.2wt.%, the molybdenum wire is placed under the graphite sieve plate, and the uranium ingot is placed on the graphite sieve plate. The sieve diameter of the graphite sieve plate is 5mm, and the center line of the adjacent sieve holes The distance between them is 10mm, the sieve holes are evenly distributed, and the thickness of the sieve plate is 8mm. After the raw materials are placed, vacuum the furnace to 5*10 -2 After Pa, the power is supplied, after the material is completely melted, the temperature is kept at 1450°C for 25min, the temperature is reduced to 1200°C at a rate of 12°C / min, and th...

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Abstract

The invention discloses a preparing method for a U-Mo-Zr alloy. The preparing method comprises the following steps of graphite crucible primary alloying, graphite sieve plate ingot leaking and ceramiccrucible secondary alloying. A primary ingot of a binary alloy is prepared through graphite crucible primary alloying firstly, then, a binary alloy ingot with few inclusions is obtained through ingotleaking in a graphite sieve plate, then, a tertiary alloy is prepared through ceramic crucible secondary alloying, and finally, the needed U-Mo-Zr alloy is obtained. In the preparing method, the graphite sieve plate is additionally arranged for conducting primary alloying, ceramic crucible secondary alloying and other optimization technology lines, technology parameters are reasonably controlled,and dissolving and diffusing of alloy elements are more sufficient. Meanwhile, the inclusions are further controlled through ingot leaking, ceramic crucible smelting is adopted for secondary alloying, the alloy purity is greatly improved, and the alloy uniformity is improved. In addition, the high-quality U-Mo-Zr alloy can be obtained by adopting three procedures, and the period of the preparingtechnology is short.

Description

Technical field [0001] The invention relates to the field of alloy preparation, in particular to the field of metal smelting and forming, in particular to a preparation method of U-Mo-Zr alloy. Background technique [0002] Adding a small amount of zirconium or molybdenum to uranium can prepare fine-grained alloys with good dimensional stability, and uranium-zirconium or uranium-molybdenum alloys have very important application value in the field of nuclear reactors. However, alloying elements have a high melting point, and their density is quite different from that of uranium. It is difficult to ensure the full dissolution of zirconium or molybdenum during the smelting process, which severely restricts the uniformity of alloy composition. In addition, during the smelting process, zirconium or molybdenum elements easily interact with carbon, nitrogen and other elements to form carbon-nitrogen inclusions, and the aggregation of inclusions is one of the reasons for the segregation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C43/00C22C1/02
CPCC22C1/02C22C43/00
Inventor 曾钢苏斌陈道明唐清富税毅龙波
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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