A kind of aluminum alloy with electromagnetic shielding function and processing method thereof

Abstract

The invention relates to the field of material processing, in particular to aluminum alloy with an electromagnetic shielding function and a processing method thereof. The aluminum alloy comprises thefollowing components in percent by mass: 2-4% of magnesium, 0.5-1% of copper, 0.01-0.1% of silicon, 0.002-0.02% of lithium, 0.002-0.02% of antimony, 0.005-0.05% of iron, 0.002-0.02% of nickel, 0.011-0.075% of boron, 0.005-0.05% of cobalt, 0.003-0.03% of niobium, 0.02-0.3% of graphene, 0.024-0.72% of a conductive polymer, and the balance of aluminum and inevitable impurities. The material comprising iron, niobium and boron has strong capability of absorbing and consuming electromagnetic waves, and can absorb the electromagnetic waves outside an object so as to achieve a shielding effect; testsshow that the electromagnetic shielding performance of the material is 50-120 dB.

Description

technical field [0001] The invention relates to the field of material processing, in particular to an aluminum alloy with electromagnetic shielding function and a processing method thereof. Background technique [0002] Electromagnetic waves, also known as electromagnetic radiation, are oscillating particle waves emitted in space by the same and mutually perpendicular electric and magnetic fields. Electromagnetic waves can effectively transfer energy. All objects above absolute zero will release electromagnetic waves. Electromagnetic waves can be divided into radio waves, microwaves, infrared rays, visible light, ultraviolet rays, X-rays and gamma rays according to different frequencies. Electromagnetic wave pollution includes man-made electromagnetic wave pollution and natural electromagnetic wave pollution. Man-made electromagnetic radiation is also electromagnetic radiation in a narrow sense. It is mainly electromagnetic radiation generated when various electronic and el...

AI Technical Summary

Problems solved by technology

[0004] The electromagnetic shielding mechanism of the shielding body is composed of three different loss mechanisms. The electromagnetic shielding mechanism of the shielding body is composed of three different loss mechanisms, namely the reflection loss on the surface of the shielding body, the absorption loss inside the shielding body and the internal interface of the shielding body. The multiple reflection losses between the electromagnetic wave shielding methods currently used mainly include coating the electromagnetic shielding material on the surface of the object or sandwiching it between the materials to reduce electromagnetic pollution. However, the above methods may have the following points. incomplete shortcomings

[0005] The application number is CN201711474597.3, which discloses a magnesium alloy with high electromagnetic shielding efficiency and its preparation method. In the process of making magnesium alloy, Sn, Zn, Ce, Ca metals are added, melting, descumming, water cooling, sawing, rolling Made of magnesium alloy, the magnesium alloy has strong hardness, and the electromagnetic shielding performance of the magnesium alloy is increased to about 30dB, but the magnesium alloy is susceptible to damage due to the presence of most active metal elements in the casting process. corrosion problem

Images