A kind of vanadium alloy with high strength and high toughness and preparation method thereof

A high-strength, high-toughness, vanadium alloy technology, which is applied in the field of metal materials and metal material processing, can solve the problems of plasticity and toughness reduction, alloy plasticity reduction, and influence on alloy mechanical properties, etc., to achieve high temperature tensile strength and plasticity improvement, and increase strength and toughness, excellent high temperature stability

Active Publication Date: 2018-11-27
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology

However, the room temperature mechanical properties of vanadium alloys in the prior art need to be improved, and they are easy to oxidize or absorb oxygen at high temperatures, resulting in a sharp decline in their mechanical properties at high temperatures, which is manifested in the decrease in their plasticity and toughness. In addition, the hot workability of the alloy will also be adversely affected
[0003] In recent years, a small number of research workers have adopted certain methods to strengthen V-Cr-Ti alloys. For example, the invention patent application document with publication number CN103422039A discloses a method for strengthening V-4Cr-4Ti alloys. Through the combination of certain heat treatment and cold working, the tensile strength at room temperature is 692MPa, and the tensile strength at 700°C is 562MPa. It can be seen that this method significantly improves the strength of V-4Cr-4Ti alloy. However, this method will make the plasticity of the alloy The strengthening phase used in this method is a Ti-(CON) precipitate, which will dissolve in a large amount in the matrix above 700°C, which will seriously affect the mechanical properties of the alloy above 700°C
The invention patent application document with publication number CN103320664 discloses a kind of Ti 3 SiC 2

Method used

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  • A kind of vanadium alloy with high strength and high toughness and preparation method thereof
  • A kind of vanadium alloy with high strength and high toughness and preparation method thereof
  • A kind of vanadium alloy with high strength and high toughness and preparation method thereof

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Embodiment

[0039] The invention provides a high-strength and high-toughness vanadium alloy, which is a V-Cr-Ti-(Y+Zr) alloy. 3.2 to 6.0 wt%, Y (yttrium) 0 to 1.0 wt%, Zr (zirconium) 0.1 to 3.0 wt%, and the balance is V.

[0040] The steps of the method for preparing the above-mentioned high-strength and high-toughness vanadium alloy are: batching→smelting→homogenization treatment→coating→thermal deformation→annealing→cold deformation→recrystallization annealing, specifically, including the following steps:

[0041] 1) Ingredients: using pure vanadium dendrites, pure titanium particles, pure chromium particles, pure zirconium particles and titanium-yttrium master alloy as raw materials, after surface pretreatment, prepare materials according to the weight percentage of the vanadium alloy components;

[0042] 2) Melting: put the above-mentioned prepared raw materials into the induction magnetic levitation melting furnace for melting, stirring, pouring and cooling, and prepare V-Cr-Ti-(Y+Zr...

example 1

[0051] (1) Design and select the V-4.5Cr-4.2Ti-1.0 (Y+Zr) alloy composition ratio to form a vanadium alloy. The preparation method includes the following steps:

[0052] 1) Ingredients: Pure V dendrites (99.9wt.%), pure Ti particles (99.9wt.%), pure Cr particles (99.9wt.%), Ti-20Y master alloy (the actual detection content of yttrium is 20.3wt.%) ) and pure zirconium particles (99.9wt.%) are alloying raw materials, and are proportioned according to the weight percentage of the above-mentioned vanadium alloy;

[0053] 2) Melting: Under an argon protective atmosphere with a purity higher than 99..99%, put the above raw materials into an induction magnetic levitation melting furnace for melting, stirring, pouring, cooling and solidification to prepare alloy ingots;

[0054] 3) Homogenization treatment: cast the alloy ingot obtained in the previous step in a vacuum of 1×10 -3 Homogenization annealing under the condition of Pa, the annealing temperature is 750°C, the time is 18 ho...

example 2

[0064] (1) Design and select the V-4.5Cr-4.2Ti-0.5 (Y+Zr) alloy composition ratio to form a vanadium alloy. The preparation method includes the following steps:

[0065] 1) Ingredients: Pure V dendrites (99.9wt.%), pure Ti particles (99.9wt.%), pure Cr particles (99.9wt.%), Ti-20Y master alloy (the actual detection content of yttrium is 20.3wt.%) ) and pure zirconium particles (99.9wt.%) are alloying raw materials, and are proportioned according to the weight percentage of the above-mentioned vanadium alloy;

[0066] 2) Melting: Under an argon protective atmosphere with a purity higher than 99.99%, put the above-mentioned raw materials into an induction magnetic levitation melting furnace for melting, stirring, pouring, cooling and solidification to prepare alloy ingots;

[0067] 3) Homogenization treatment: cast the alloy ingot obtained in the previous step in a vacuum of 2×10 -3 Homogenization annealing under the condition of Pa, the annealing temperature is 850°C, the time...

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Abstract

The invention discloses a high-strength high-toughness vanadium alloy which comprises the following components in percentage by weight: 3.2-6.0 wt% of Cr (chromium), 3.2-6.0 wt% of Ti (titanium), and 0.1-4.0 wt% of Y (yttrium) and Zr (zirconium). The preparation method comprises the following steps: after adding the Y element and Zr element on the basis of a V-Cr-Ti three-component alloy system, carrying out smelting, homogenizing treatment, coating, hot deformation, annealing, cold deformation, recrystallization annealing and the like to synthesize the V-Cr-Ti-(Y+Zr) alloy. The vanadium alloy gives consideration to the strength and toughness at both room temperature and high temperature, and can be used as a potential structural material for fusion reactors and fission reactors. The preparation method can be used for large-scale production of the vanadium alloy.

Description

technical field [0001] The invention relates to the field of metal materials and metal material processing, in particular to a high-strength and high-toughness vanadium alloy and a preparation method thereof. Background technique [0002] Vanadium alloy is an alloy composed of vanadium-based and other alloying elements. Compared with other structural materials, it has the advantages of high-temperature strength, low ductile-brittle transition temperature, and excellent low activation characteristics. Therefore, it is the first in fusion reactors. Alloy materials are preferred for structures such as walls, cladding, and divertors, and are most likely to be used in Li / V cladding. After systematic and in-depth research and multiple performance evaluation results, the United States, Japan and other countries first recommended V-4Cr-4Ti as a candidate material for fusion reactor structural materials. However, the room temperature mechanical properties of vanadium alloys in the p...

Claims

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Application Information

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IPC IPC(8): C22C27/02C22C1/03C22F1/18
CPCC22C1/03C22C27/025C22F1/18
Inventor 彭丽霞赖新春蒋春丽周萍
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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