A helmet is a tool to protect the head. From 2020, the traffic law stipulates that riding a motorcycle without a helmet will be punished. Usually, people resist wearing helmets because they are heavy. Manufacturers are now applying magnesium alloys to make helmets lighter. The magnesium alloy die-casting thixotropic helmet is lighter than other materials. It can not only solve some of the existing shortcomings, but also has a good impact buffering effect, and is comfortable to wear, wash and disassemble freely. It is also very convenient to replace, the surface is easy to paint, has high-temperature resistance, is waterproof and moisture-proof, is durable, has heavy pressure, the seat does not change, and it is easy to recycle. In recent years, the industry's demand for lightweight materials has also increased. As a structural material, magnesium alloys have small specific gravity, high specific strength and specific stiffness, good thermal conductivity and electrical conductivity, excellent damping, and electromagnetic shielding. Therefore, it is...
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