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Titanium alloy with high impact toughness and low activation for nuclear reactor

A technology for nuclear reactors and titanium alloys is applied in the field of high impact toughness and low activation titanium alloys to achieve the effect of improving room temperature strength, low activation characteristics and improving impact toughness

Active Publication Date: 2018-07-20
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no titanium alloy specially developed for low activation requirements in the nuclear industry.

Method used

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  • Titanium alloy with high impact toughness and low activation for nuclear reactor
  • Titanium alloy with high impact toughness and low activation for nuclear reactor
  • Titanium alloy with high impact toughness and low activation for nuclear reactor

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Effect test

Embodiment 1

[0022] The titanium alloy with high impact toughness and low activation for nuclear reactor in this embodiment is composed of the following components by mass percentage: Al 3.5%, V 3.0%, Zr 3.0%, Cr 0.5%, Si 0.1%, and the balance is titanium and unavoidable impurities . The impurities include Ni, Fe, O, C, Cu, Co and H, and the mass percentages of the impurities in the titanium alloy are: Ni≤0.005%, Fe≤0.03%, O≤0.15%, C≤ 0.02%, Cu≤0.005%, Co≤0.0001%, H≤0.003%.

[0023]The preparation method of the titanium alloy with high impact toughness and low activation for the nuclear reactor in this embodiment is: prepare the titanium alloy material according to the nominal composition Ti-3.5Al-3V-3Zr-0.5Cr-0.1Si (mass percentage, %), and use grade 0 sponge as the raw material Titanium, Al-55V master alloy, Al-10Si master alloy, electrolytic chromium, zirconium sponge and aluminum beans, after mixing the materials, press the electrode, and use the vacuum consumable electric arc furnace...

Embodiment 2

[0026] The titanium alloy with high impact toughness and low activation for nuclear reactor in this embodiment consists of the following components by mass percentage: Al 4.0%, V 3.0%, Zr 3.0%, Cr 1.0%, Si 0.1%, and the balance is titanium and unavoidable impurities . The impurities include Ni, Fe, O, C, Cu, Co and H, and the mass percentages of the impurities in the titanium alloy are: Ni≤0.005%, Fe≤0.03%, O≤0.15%, C≤ 0.02%, Cu≤0.005%, Co≤0.0001%, H≤0.003%.

[0027] Titanium alloy materials are prepared according to the nominal composition Ti-4Al-3V-3Zr-1Cr-0.1Si (mass percentage, %), and the raw materials are 0-grade sponge titanium, Al-85V master alloy, Al-10Si master alloy, electrolytic chromium, fine strip Zirconium and aluminum beans are mixed, pressed into electrodes, and smelted in a vacuum consumable electric arc furnace for a second time to obtain alloy ingots. Control the content of impurity elements in the ingot: Ni≤0.005%, Fe≤0.03%, O≤0.15%, C≤0.02%, Cu≤0.005%, ...

Embodiment 3

[0030] The titanium alloy with high impact toughness and low activation for nuclear reactor in this embodiment consists of the following components by mass percentage: Al 5.0%, V 4.0%, Zr 2.0%, Cr 1.5%, Si 0.3%, and the balance is titanium and unavoidable impurities . The impurities include Ni, Fe, O, C, Cu, Co and H, and the mass percentages of the impurities in the titanium alloy are: Ni≤0.005%, Fe≤0.03%, O≤0.15%, C≤ 0.02%, Cu≤0.005%, Co≤0.0001%, H≤0.003%.

[0031] The titanium alloy material is prepared according to the nominal composition Ti-5Al-4V-2Zr-1.5Cr-0.3Si (mass percentage, %), and the raw materials are 0-grade sponge titanium, Al-55V master alloy, electrolytic chromium, sponge zirconium and aluminum beans. After mixing the materials, the electrodes are pressed, and the alloy ingots are obtained by secondary melting in a vacuum consumable electric arc furnace. Control the content of impurity elements in the ingot: Ni≤0.005%, Fe≤0.03%, O≤0.15%, C≤0.02%, Cu≤0.005%,...

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Abstract

The invention provides high-impact-toughness low-activation titanium alloy for a nuclear reactor. The high-impact-toughness low-activation titanium alloy is prepared from, by mass, 3.5%-5.5% of Al, 2.0%-5.0% of V, 2.0%-5.0% of Zr, 0.5%-2.0% of Cr, 0.1%-0.5% of Si and the balance Fe and inevitable impurities. Compared with traditional TC4 titanium alloy, the high-impact-toughness low-activation titanium alloy has the similar indoor temperature comprehensive mechanical property and is more suitable for being used in neutron irradiation environment due to the lower activation and better neutron irradiation structure stability, the titanium alloy material can be used as the shell structure material for shore nuclear power plants and water floating nuclear power plants in the future due to the good seawater corrosion resistance, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the field of structural titanium alloy materials, in particular to a titanium alloy with high impact toughness and low activation for nuclear reactors. Background technique [0002] The material problem has always been one of the "bottleneck" problems in whether nuclear energy can realize the final commercial application, and it is a major field of nuclear energy research in many countries in the world. Titanium alloys are more and more widely used in modern hull structures because of their unique mechanical properties, non-magnetic properties, low density, high melting temperature, good welding performance, and good corrosion resistance in various media, such as Parts of various mechanisms and devices, pipelines of nuclear energy equipment, special systems and outboard systems, etc. [0003] In the periodic table of elements, both titanium and zirconium belong to group IVB. The zirconium metal currently used in nuclear power ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22F1/18
CPCC22C14/00C22F1/183
Inventor 赵永庆赵彬张平祥侯智敏尹燕飞曾光
Owner 西部超导材料科技股份有限公司