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High-strength high-conductivity Pb-Li-Sc lead-lithium alloy for shielding material

A technology of shielding material and high electrical conductivity, applied in the field of alloys, can solve problems such as the inability to meet the requirements of combustion resistance, and achieve the effect of solving the problem of large hot cracking tendency, low liquid-solid solidification temperature range, and excellent mechanical properties.

Inactive Publication Date: 2018-06-19
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a structural material, it is far from enough to meet the requirements of only having combustion resistance during smelting. More importantly, the final lead-lithium alloy product must also have satisfactory mechanical strength, at least reaching the level commonly used. Mechanical properties of lead-lithium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-strength and high-conductivity Pb-Li-Sc lead-lithium alloy for smelting shielding materials at 350 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.9wt.%, Sc: 0.6wt.%, Nb: 0.3wt.%, Co: 1.2wt.%, Sb: 0.5wt.%, Th: 0.1wt .%, and the balance is lead. The preparation method of the alloy: add the above-mentioned raw materials into the atmosphere-protected induction furnace, and use a silicon carbide crucible; induction heat to 350 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; put the alloy liquid in After standing at 350°C for 10 minutes, it is cast into the equipment at the same level as the hot top for semi-continuous casting into the required square and round ingots, and the ingot moves down at a speed of 12m / min. The ingot is deformed at room temperature, and the amount of rolling in each pass is 10%; every 3 passes of rolling requires an intermediate heat tr...

Embodiment 2

[0020]A high-strength and high-conductivity Pb-Li-Sc lead-lithium alloy for smelting shielding materials at 370 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 1.4wt.%, Sc: 0.6wt.%, Nb: 0.3wt.%, Co: 0.8wt.%, Sb: 0.6wt.%, Th: 0.2wt .%, and the balance is lead. The preparation method of the alloy: add the above-mentioned raw materials into the atmosphere-protected induction furnace, and use a silicon carbide crucible; induction heat to 370 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; put the alloy liquid in After standing at 370°C for 10 minutes, it is cast into the equipment at the same level as the hot top for semi-continuous casting into the required square and round ingots. The ingot moves down at a speed of 10m / min. The ingot is deformed at room temperature, and the amount of rolling in each pass is 12%; every 3 passes of rolling need to be subjected to an intermedia...

Embodiment 3

[0022] A high-strength and high-conductivity Pb-Li-Sc lead-lithium alloy for smelting shielding materials at 390 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 1.2wt.%, Sc: 0.5wt.%, Nb: 0.3wt.%, Co: 0.8wt.%, Sb: 0.6wt.%, Th: 0.2wt .%, and the balance is lead. The preparation method of the alloy: add the above-mentioned raw materials into the atmosphere-protected induction furnace, and use a silicon carbide crucible; induction heat to 390 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; put the alloy liquid in After standing at 390 degrees for 10 minutes, it is cast into the equipment at the same level as the hot top for semi-continuous casting into the required square and round ingots. The ingot moves down at a speed of 10m / min. The ingot is deformed at room temperature, and the amount of rolling in each pass is 12%; every 3 passes of rolling need to be subjected to an int...

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Abstract

The invention discloses high-strength high-conductivity Pb-Li-Sc lead-lithium alloy for a shielding material and a processing technology thereof. The high-strength high-conductivity Pb-Li-Sc lead-lithium alloy comprises, by weight, 0.8-1.6wt.% of Li, 0.4-0.8wt.% of Sc, 0.2-0.5wt.% of Nb, 0.6-1.4wt.% of Co, 0.4-0.8wt.% of Sb, 0.1-0.2wt.% of Th, and the balance lead. The lead-lithium alloy has the high-strength high-conductivity performance which is not provided for traditional lead alloy for the shielding material. The high-strength high-conductivity Pb-Li-Sc lead-lithium alloy is applied to the fields of nuclear piles, medical radioactive source shielding, nuclear waste processing and the like, safe operation of a nuclear reactor system can be effectively ensured, and the system operationlife is prolonged.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a lead-lithium alloy. Background technique [0002] Nuclear energy will become the ultimate energy demand of mankind. The development of nuclear power can not only optimize my country's energy structure and maintain national energy security, but also help expand domestic demand and promote the upgrading of industrial structure. The reactor is the core part of the nuclear energy system. Nuclear fission (or fusion) produces different energy levels of neutrons, gamma rays, secondary gamma rays, other charged particles and high-energy rays. Radiation protection depends on the performance of shielding materials and the optimal design of radiation shielding structures. The research and preparation of radiation protection materials has become one of the most important topics in the field of scientific research and industry, and is of great significance to national defense and civilian ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/00C22C11/02C22C1/02C22F1/12C22F1/02
CPCC22C11/00C22C1/02C22C11/02C22F1/02C22F1/12
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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