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Erica Zhu Feilong Jiangli

New automotive materials

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[Feilong Jiangli Edition]

Although the proportion of heat-resistant materials in automobiles is small, they are all important parts of the engine is very important, has a great impact. Such as the high temperature part of the combustion chamber, the diesel engine's pre combustion chamber exhaust system, turbocharger, catalytic converter and so on. These components have high performance requirements: high temperature strength, small thermal expansion coefficient, processing performance, high temperature oxidation resistance, high temperature corrosion resistance, lightweight and so on. The new materials currently used include: high silicon material, chromite heat-resistant alloy, austenitic stainless steel and so on.

Composite steel is a laminated material bonded by steel plate and plastic and other non-metallic materials, with corrosion resistance, vibration reduction, sound insulation, lightweight and other advantages, suitable for making automotive panels (such as engine cover), oil pan, air filter, etc.

As a substitute for steel, lightweight materials mainly include aluminum, magnesium, titanium and other light metals, aluminum alloy is the most widely used, is an important development direction of automotive materials in the future. Magnesium is the lightest metal, and its density is 2/3 of aluminum, but the cost of production is higher. The commonly used die casting magnesium alloys are mainly used for manufacturing grille, transmission handle, transmission housing, etc. The main characteristics of titanium alloy are high temperature strength, good corrosion resistance, density is 1/2 of iron, but also the disadvantages of high production costs, can not be used in large quantities at present, only for the manufacture of a few parts of high-grade cars.

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