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Formula of radiation shielding lead alloy

A radiation shielding and lead alloy technology, applied in the field of alloy materials, can solve the problems of reduced toughness of boron-aluminum alloys, affecting shielding effect, and large material brittleness, so as to enhance plasticity and toughness, overcome secondary bremsstrahlung, and meet structural requirements. Effect

Active Publication Date: 2018-08-10
JIANGSU ZHONGHAI HUA HE ENVIRONMENTAL PROTECTION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the materials and products used for anti-nuclear radiation biological shielding mainly include the following categories: one is mainly lead used in ordinary industries, and it is rolled or poured into gapless metal block lead plates, lead bricks, lead-skinned concrete, etc. Practice has proved that although this type of product has a better anti-nuclear radiation effect, it has a large amount of use when building a shielding system, is difficult to build, has low work efficiency, has a lot of production waste, and has high potential toxicity; and lead plate products have poor conformability and are not easy to bend. It is not suitable for shielding of special-shaped equipment; the second category is flexible products, paints, adhesives, etc., which are mainly lead powder, rubber, polyethylene foam, etc. as base materials. It has a certain degree of flexibility, but because the lead powder particles are easy to accumulate, it is difficult to mix evenly in the base material, so the shielding performance is uneven; the third type uses a gapless metal block lead skin as the inner core, and the inner and outer layers are covered with cross-linked foam Materials and synthetic rubber cotton material products, this type of product has low lead equivalent, which affects the shielding effect and brings the risk of radiation to the staff
[0003] In addition to high shielding effect, anti-nuclear radiation biological shielding products must also have good physical and mechanical properties. The traditional shielding materials are lead and tungsten alloys, which have good neutron and γ-ray shielding properties, but The material is brittle; some new polymer-based and heavy metal-based shielding materials generally have poor flexibility; materials such as high-density alloys, lead glass, and boron-aluminum alloys also have high brittleness defects, and boron-aluminum alloys are prone to brittleness at grain boundaries. The formation of boron-rich borides increases the brittleness of the material and reduces the toughness of boron-aluminum alloys

Method used

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  • Formula of radiation shielding lead alloy
  • Formula of radiation shielding lead alloy

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Embodiment 1

[0024] The present invention provides a radiation shielding lead alloy formula. Specifically, the lead alloy of the present invention is used to produce a radiation shielding material with excellent performance. The radiation shielding material is a multilayer special-shaped mosaic structure, and the first layer is a molding property. Excellent first lead alloy metal layer. The first lead alloy metal layer contains lead, tungsten, boron, aluminum, titanium, copper, nickel, and molybdenum. Specifically, the composition of the first lead alloy metal layer The weight percentages are as follows:

[0025] Tungsten W 0.5% to 1.2%, preferably 0.8%;

[0026] Boron B is 0.1% to 1%, preferably 0.3%;

[0027] Aluminum 0.013%~0.027%, preferably 0.021%;

[0028] Titanium Ti 0.009% to 0.016%, preferably 0.011%;

[0029] Copper Gu 0.1%~0.23%, preferably 0.18%;

[0030] Nickel Ni 0.08%~0.13%, preferably 0.14%;

[0031] Mo 0.006%~0.019%, preferably 0.012%;

[0032] For the remaining amount of reduced lea...

Embodiment 2

[0041] The lead alloy metal layer is prepared by a high-density intelligent spray deposition gun. The high-density intelligent spray deposition gun includes a gas delivery tube 1, a primary feed port 2, a stirrer 3, an inert gas generator 4, and an induction heating furnace 5. , Molten metal transfer pipe 6, inert gas protective cover 7, spray gun base 8, first spray gun 9, second spray gun 10, pressure generator 11, graphite crucible 12, temperature sensor 13, secondary feed port 14, intelligent control 器15, the deposition gun body 16, the mixing chamber 17. The first-level feed port 2 is located on the top of the deposition gun body 16, and there are two in total, which are connected to the second-level feed port 14, which is located inside the deposition gun body 16, and is connected to the graphite. The crucible 12 is provided with two graphite crucibles 12 inside, the bottom of the graphite crucible 12 is connected with a molten metal transfer pipe 6, and a rotary spray gun...

Embodiment 3

[0043] First, glue the third and fourth layers of special-shaped radiation shielding materials such as flat panels or arc-shaped panels to form an integrated structure, and fix them on the three-dimensional intelligent motion platform. Then, the metals required for the second lead alloy metal layer are mixed according to the composition ratio and then injected into the stirring chamber. After stirring, they are injected into the graphite crucible. The metal liquid mixture flows into the spray gun through the molten metal transfer tube, and is atomized by the high-pressure gas into a uniform droplet spray. , The movement mode of the three-dimensional intelligent motion platform is controlled by the intelligent controller. According to the requirements of the cooling speed, it moves according to a certain rule. The injection density is controlled by the intelligent controller. The injection density composite function: m(r)=exp(-b× r 2 )×β, where m(r) is the spray density function,...

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Abstract

The invention provides a formula of a radiation shielding lead alloy, in particular to a radiation shielding material with a multilayer special-shaped inlay structure taking lead alloy as a main raw material. The synergistic protective effect of rays of different elements is made full use of, the rays are finally absorbed by material through the process of photoelectric effect, so when ray particles are scattered several times and the energy decreases to the range of extranuclear electron energy level difference, the cross section of the photoelectric effect increases significantly, and the phenomenon is called the absorption limit. Because each element is provided with a different absorption limit in the ray energy range, different functional elements are reasonably combined so that the radiation absorbing material has a wider radiation energy range absorption limit, and the cross section of the radiation absorbing material subjected to the photoelectric effect is obviously increased,and thus the shielding performance of a radiation protective material is obviously enhanced, the secondary toughening radiation of lead is effectively overcome, and the plasticity and toughness of the radiation shielding material are enhanced.

Description

Technical field [0001] The invention relates to the field of alloy materials, in particular to the formulation of radiation shielding lead alloys. Background technique [0002] With the development of science and technology and the diversification of nuclear operating conditions, the research and preparation of radiation protection materials has become one of the most important topics in the field of scientific research. Currently, the materials and products used for anti-nuclear radiation biological shielding mainly include the following categories: One type is based on common industrial lead, which is rolled or poured into non-gap metal block lead plates, lead bricks, lead-skin concrete, etc. , Practice has proved that although this type of product has better anti-nuclear radiation effects, it has a large amount of use when building a shielding system, difficult construction, low work efficiency, large production waste, and high potential toxicity; and lead plate products have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/00B22F3/115
CPCB22F3/115C22C11/00
Inventor 周宏宇岳仁亮徐俊波刘汉顺韩平飞陈洪生金政光谢弘莉
Owner JIANGSU ZHONGHAI HUA HE ENVIRONMENTAL PROTECTION CO LTD
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