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Application Potential of Magnesium Alloys in Automotive Field
Release time: 2024-03-01
Magnesium alloy has the characteristics of light weight, high specific strength, high stiffness, impact resistance, fast heat dissipation, anti-electromagnetic, and environmental protection. Magnesium alloys are currently lighter engineering structural materials. The density of magnesium alloy is about 2/3 of aluminum alloy and 1/4 of steel. At the same time, the heat dissipation performance of magnesium is almost twice that of steel and 10 times that of plastic. It also has the advantages of anti-electromagnetic and recyclable. These industrial properties and its abundant reserves in the natural environment make it unique. Wide application potential. The expansion of magnesium alloy application scenarios is expected to significantly stimulate magnesium consumption.
Automobile energy saving and emission reduction is an important development direction of the future industry. At present, the world is gradually transitioning to a low-carbon era. The world's major auto markets have enacted stricter carbon emission rules. The introduction of regulations such as the National VI emission standards and dual-point management measures has put forward higher requirements for the technical upgrade of the main engine plant. How to be effective in the future? Reducing average fuel consumption and carbon dioxide emissions will become an important direction for the development of the automobile industry. Automobile lightweight is one of the main schemes for energy saving and emission reduction. At present, the improvement of new energy fuels and fuel utilization is relatively slow, and the lightweight of automobiles has become a better way to reduce exhaust emissions and improve fuel economy. According to the "Analysis of Current Situation and Development Trend of Lightweight Vehicles", under NEDC working conditions, the vehicle weight can be reduced by 100kg, which can save fuel 0.39L. For every 10% reduction in vehicle weight, fuel consumption can be reduced by 6% and emissions can be reduced by 4%. In the current vehicle project development, determining the reasonable weight reduction target has become the key target of the vehicle material selection plan, and tracking the changes of the project development plan and formulating the weight reduction plan is an important means to achieve the goal.
The excellent characteristics of magnesium alloy can provide the best solution for automobile lightweight. As a new lightweight metal material, magnesium has a density of 2/3 of aluminum and 1/4 of zinc, and the specific strength of magnesium alloy is higher than that of aluminum alloy and steel. Compared with high-strength steel and aluminum alloy, the weight reduction effect of magnesium alloy is more obvious; on the other hand, although carbon fiber can reduce the weight of automobile by more than 50%, magnesium alloy may be eliminated due to the difficulty of large-scale production in carbon fiber industry and its obvious disadvantage in waste recycling compared with magnesium alloy. The best choice for current car lightweight.
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