Additive manufacturing method for aluminum-based boron carbide structures for neutron protection

Abstract

The invention discloses an additive manufacturing method for an aluminum-based boron carbide structure oriented to neutron protection, comprising the following steps: redesigning the aluminum alloy solid structure into a lattice structure through topology optimization, and applying laser selective melting technology to it. Manufacturing and forming; the lattice structure is a porous structure with a certain porosity inside, and the outer contour is closed, but the boron carbide powder filling port is left; the fine boron carbide powder is poured into the aluminum alloy lattice structure; The boron carbide powder filling port of the aluminum alloy lattice structure is re-added by the laser selective melting technology, so that the external contour of the re-added aluminum alloy lattice structure is physically complete. The present invention applies the feature of the high degree of freedom in forming the additive manufacturing structure to the forming and manufacturing of the anti-neutron radiation aluminum-based boron carbide material, which makes up for the inability of the traditional manufacturing method for the anti-neutron radiation-resistant aluminum-based boron carbide material to form an anisotropic structure. The spatial distribution of the sub-absorbent material has the defects of low protection efficiency and leakage.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to an additive manufacturing method for an aluminum-based boron carbide structure oriented to neutron protection. Background technique [0002] Laser selective melting is a metal additive manufacturing technology that has developed rapidly in recent years. It can form aluminum alloy parts of any shape. Compared with other metal additive manufacturing technologies, it has the advantages of good dimensional accuracy, high surface quality and high density. . Topological optimization lattice design is a structural design method in additive manufacturing. It can reduce the weight of the solid structure, and finally turn the solid structure into a porous structure composed of several unit structures through the idea of ​​finite elements. The material of the lattice structure is characterized by light weight, high strength ratio and high specific rigidity. And ...

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Problems solved by technology

[0005] The main purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, to provide a method for additive manufacturing of aluminum-based boron carbide structures for neutron protection, and to apply the characteristics of high degree of freedom in the formation of additive manufacturing structures to neutron protection In the forming and manufacturing of radiated aluminum-based boron carbide materials, it makes up for the defect that the traditional manufacturing method of anti-neutron radiation aluminum-based boron carbide materials cannot form complex structures

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