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High-strength low-temperature-resistant Pb-Li-Mn lead-lithium alloy for shielding material

A pb-li-mn, shielding material technology, 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, overcoming the difference in specific gravity, and excellent flame retardant performance.

Inactive Publication Date: 2018-07-13
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 low-temperature resistant Pb-Li-Mn lead-lithium alloy for melting shielding materials at 350 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.9wt.%, Mn: 1.2wt.%, Se: 0.3wt.%, Cr: 0.8wt.%, Ba: 0.3wt.%, In: 0.7wt .%, 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 15%; every 3 passes of rolling requires an intermediate ...

Embodiment 2

[0021]A high-strength and low-temperature resistant Pb-Li-Mn lead-lithium alloy for melting shielding materials at 370 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 1.4wt.%, Mn: 1.2wt.%, Se: 0.3wt.%, Cr: 1.2wt.%, Ba: 0.3wt.%, In: 0.6wt .%, 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 18%; every 3 passes of rolling require an intermediate heat t...

Embodiment 3

[0024] A high-strength and low-temperature resistant Pb-Li-Mn lead-lithium alloy used for melting shielding materials at 390 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 1.5wt.%, Mn: 1.2wt.%, Se: 0.3wt.%, Cr: 1.2wt.%, Ba: 0.3wt.%, In: 0.7wt .%, 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 18%; every 3 passes of rolling require an interme...

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Abstract

The invention discloses a high-strength low-temperature-resistant Pb-Li-Mn lead-lithium alloy for a shielding material and a processing technology thereof. The alloy comprises the following components, by weight percentage: 0.8-2.4wt% of Li, 0.6-1.8wt% of Mn, 0.2-0.4wt% of Se, 0.6-1.5wt% of Cr, 0.2-0.4wt% of Ba, 0.6-0.9wt% of In and the balance Pb. The lead-lithium alloy has the high strength which a traditional lead alloy for a shielding material does not have, and excellent plasticity can be achieved at extremely low temperature. The lead-lithium alloy is applied to the fields of nuclear reactor polar environment, medical radioactive source shielding, nuclear waste treatment and the like in the polar environment, safe operation of a nuclear reactor system can be effectively guaranteed, and the service life of the system can be 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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