对于高比功率的汽油机,过共晶合金活塞的制造必须给以特殊的考虑。在生产这些高质量的活塞中,应当优先考虑严格的质量控制和采用金刚石刀具。 众所周知,当今的汽油机比以前的汽油机工作条件更苛刻,并且在温度高得多的工况下工作。数年前,船用、竞赛、以及其他高性能的用途已面对类似的工作负载要求。目前,在活塞制造中过共晶合金已发展到取代过去制造活塞使用的普通亚共晶和共晶合金,这些合金 For high specific power gasoline engines, the manufacture of hypereutectic alloy pistons must be given special consideration. In producing these high-quality pistons, priority should be given to strict quality control and the use of diamond tools. It is well-known that today’s gasoline engines are more demanding than previous gasoline engines and operate at much higher temperatures. A few years ago, similar workload requirements were encountered for marine, racing, and other high-performance uses. At present, hypereutectic alloys have been developed in piston manufacture to replace the usual hypoeutectic and eutectic alloys used in the manufacture of pistons. These alloys