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粉末冶金制品,由于具有材料利用率高,能够进行大量生产的优点,因而在汽车零件的制造上得到了广泛的应用。1974—1978年间,汽车生产量增加约1.6倍,而粉末冶金机械零件的增长达3倍。达到如此高的增长率,是由于有效地利用了粉末冶金经济效益高的优点,以及1975年间汽车液压转向装置、自动变速箱、空气调节器等新装置的普及。为了扩大粉末冶金零件的应用范围,必须开发新的粉末冶金技术。作为结构零件用的烧结技术,如以提高强度为目标的烧结锻造技术及高强度材料用合金粉末的开发,为了降低成本进行的铸铁切屑利用技术的开发,以及烧结冷锻、复合成形等新技术的研究等正在进行并逐渐被应用。随着对汽车的轻型化要求越来越高,烧结铝材料的应用研究也很盛行,但由于成本方面的原因,目前
Powder metallurgy products have been widely used in the manufacture of automobile parts due to their advantages of high material utilization rate and mass production. Between 1974 and 1978, car production increased about 1.6 times, while powder metallurgy machinery parts up to 3 times. Achieving such a high growth rate is due to the effective utilization of the advantages of high economic efficiency of powder metallurgy and the popularity of new devices such as hydraulic steering, automatic transmissions and air conditioners for 1975. In order to expand the application of powder metallurgy parts, we must develop new powder metallurgy technology. Sintering technologies for structural components include development of sintering forging technology and high-strength alloy powder for increasing strength, exploitation of cast-iron chip utilization technology for cost reduction, and new technologies such as sintering, cold forging and composite forming Research is ongoing and gradually being applied. With the increasing demand for lightweight automotive, the application of sintered aluminum materials is also very popular, but due to cost reasons, at present