随着国民经济发展的需要,应努力提高大修发动机的质量,以便延长汽车大修间隔里程。为此,我们用稀土镁球墨铸铁制造缸套‘并装上我区701车队660型客车的CA10B发动机上进行运行试验。从1973年12月1日装车到1977年4月20日共行驶334892公里。实践证明稀土镁球墨铸铁缸套比一般灰口铸铁缸套耐磨性能好,可大大提高大修发动机质量,延长大修发动机的间隔里程,减少保修费用,并节约汽油,现将我们试验的一些情况作一介绍。 With the needs of national economic development, efforts should be made to improve the quality of engine overhauls in order to extend the interval for car overhauls. To this end, we made the cylinder liner with rare earth magnesium nodular cast iron and put it on the CA10B engine of the 701 fleet 660 in our district for running test. From December 1, 1973 loading to April 20, 1977 a total of 334892 kilometers. Practice shows that rare earth magnesium nodular cast iron cylinder liner wear resistance than the average gray cast iron cylinder, which can greatly improve the quality of engine overhaul, extended engine overhaul interval mileage, reduce warranty costs, and save gasoline, now we test some of the conditions for An introduction.