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Nitric acid corrosion resistant titanium-based neutron absorbing material and preparation method thereof

A technology of absorbing material and nitric acid, which is applied in the field of nitric acid corrosion-resistant titanium-based neutron absorbing material and its preparation, can solve the problems of high radioactivity and strong corrosiveness, high difficulty in equipment maintenance, and personnel injured by radiation, and achieves strong absorption. effect of sub-capacity, good hot workability, good weldability

Active Publication Date: 2022-05-17
西安稀有金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The working environment of key equipment has the characteristics of high radioactivity and strong corrosiveness, and the maintenance of equipment is difficult. The cost of maintenance and replacement of key equipment far exceeds the cost of the equipment itself, and may cause personnel to be injured by radiation and radioactive pollution

Method used

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  • Nitric acid corrosion resistant titanium-based neutron absorbing material and preparation method thereof
  • Nitric acid corrosion resistant titanium-based neutron absorbing material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] The nitric acid corrosion-resistant titanium-based neutron absorbing material of this embodiment is composed of the following components in mass content: Ta 6%, Gd 15%, and the balance is Ti and unavoidable impurities.

[0034] This embodiment includes the following steps;

[0035] Step 1. After mixing titanium-tantalum master alloy scraps, gadolinium scraps and titanium sponge, they are smelted to obtain titanium alloy ingots; the melting method is vacuum consumable arc melting; the amount of gadolinium scraps added is theoretically Increase by 30% on the basis of quantity;

[0036] Step 2, forging the titanium alloy ingot obtained in step 1 to obtain a titanium alloy forging; the forging process is: sequentially carry out billet forging, intermediate forging and finished product forging, wherein the temperature of billet forging is 1080°C, The temperature of the intermediate forging is 980°C, the firing times of the intermediate forging are 2 times, and the temperatu...

Embodiment 2

[0059] The nitric acid corrosion-resistant titanium-based neutron absorbing material of this embodiment is composed of the following components in mass content: Ta 6%, Gd 10%, and the balance is Ti and unavoidable impurities.

[0060] This embodiment includes the following steps;

[0061] Step 1: Melting titanium-tantalum master alloy scraps, gadolinium scraps and titanium sponge after mixing to obtain titanium alloy ingots; the smelting method is a non-consumable vacuum electric arc furnace melting method; the amount of gadolinium scraps added is theoretically Add 20% on the basis of the added amount;

[0062] Step 2. Forging the titanium alloy ingot obtained in step 1 to obtain a titanium alloy forging; the forging process is: sequentially carry out billet forging, intermediate forging and finished product forging, wherein the temperature of billet forging is 1060°C, The temperature of the intermediate forging is 950°C, the firing times of the intermediate forging are 3 tim...

Embodiment 3

[0067] The nitric acid corrosion-resistant titanium-based neutron absorbing material of this embodiment is composed of the following components in mass content: Ta 6%, Gd 5%, and the balance is Ti and unavoidable impurities.

[0068] This embodiment includes the following steps;

[0069] Step 1: Melting titanium-tantalum master alloy scraps, gadolinium scraps and titanium sponge after mixing to obtain titanium alloy ingots; the melting method is a cold hearth smelting method; the addition of the gadolinium scraps is within 15% increase on the basis;

[0070]Step 2, forging the titanium alloy ingot obtained in step 1 to obtain a titanium alloy forging; the forging process is: sequentially carry out blank forging, intermediate forging and finished product forging, wherein the temperature of blank forging is 1070°C, The temperature of the intermediate forging is 1000°C, the fire time of the intermediate forging is 1 time, and the temperature of the finished forging is 860°C; Th...

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Abstract

The invention discloses a nitric acid corrosion resistant titanium-based neutron absorption material, which is composed of the following components in percentage by mass: 5-7% of Ta, 1-15% of Gd and the balance of Ti and inevitable impurities, the alloy utilizes the excellent corrosion resistance of titanium-tantalum alloy in nitric acid and the excellent neutron absorption performance of gadolinium element, and the corrosion resistance of the titanium-tantalum alloy in nitric acid is improved. The titanium-tantalum-gadolinium ternary solid neutron poison material with good nitric acid corrosion resistance is formed, so that the requirement of the spent fuel post-treatment industry for a corrosion-resistant neutron poison material is met, and in addition, the invention further provides a method for preparing the nitric acid corrosion-resistant titanium-based neutron absorbing material. According to the method, titanium-tantalum intermediate alloy scraps, gadolinium scraps and sponge titanium are mixed and then smelted, the nitric acid corrosion resistant titanium-based neutron absorbing material is obtained through a series of forging, rolling and heat treatment, and the prepared nitric acid corrosion resistant titanium-based neutron absorbing material not only has good mechanical properties, but also has good corrosion resistance. The neutron absorption capability and the nitric acid corrosion resistance are excellent.

Description

technical field [0001] The invention belongs to the technical field of nitric acid corrosion-resistant titanium alloys, and in particular relates to a nitric acid corrosion-resistant titanium-based neutron absorbing material and a preparation method thereof. Background technique [0002] my country's nuclear power development speed is gradually accelerating, and the amount of nuclear spent fuel production and storage is also increasing. This puts forward higher requirements for my country's nuclear spent fuel reprocessing capacity, and it is urgent to further expand the scale of commercial reprocessing plants. [0003] At present, the Purex water process is widely used in the reprocessing of spent fuel in countries all over the world. The useful fissionable elements are extracted and recovered through reprocessing, and the radioactive waste is properly treated and safely disposed of. The Purex process first cuts the spent fuel assembly into short sections, and then leaches a...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03C22F1/18
CPCC22C14/00C22C1/03C22F1/183Y02E30/30Y02W30/50
Inventor 吴金平吴俊宇李欢赵恒章赵彬杨帆
Owner 西安稀有金属材料研究院有限公司
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