在美国的汽车工业突然转向小汽车生产后,铝和镁的铸件取代了汽车中的部分铸铁部件。据报道,现在在福特汽车的一种独特形式的“复合汽车”上用85～90磅铝铸件,预计到85年,将增加到105～115磅。该种车的铸铁件约400～425磅,预计到85年会降到320～330磅。铸铁用量减少是因为使用了较小的引擎和驱动装置,还 After the automobile industry in the United States suddenly turned to car production, aluminum and magnesium castings replaced parts of the cast iron in the car. It is reported that now 85 to 90 pounds of aluminum castings are used on a unique form of “composite car” for Ford Motor Co., and it is estimated that it will increase to 105 to 115 pounds by 85 years. The cast iron is about 400 to 425 pounds and is expected to drop to 320 to 330 pounds by 85 years. The amount of cast iron is reduced because of the use of smaller engines and drives, also