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国外发动机缸套的寿命最高约70万公里,一般的为20～30万公里。我公司最高的是12万公里,一般的为8～10万公里;比较差的仅5～6万公里即需搪缸。对部分发动机缸套采用多孔镀铬,效果虽然较好,但工艺复杂、时间长、成本高且存在水质污染问题。有的虽用高磷铸铁及含硼铸铁作为缸套材料,但成分不易保证,组织亦不均匀。为提高缸套寿命,我公司参照大连冷冻机厂等兄弟单位的经验,对缸套内表面实行电加热淬火,设备及工艺均较简单,成本低,周期短,经行驶4万公里后拆检证明,效果优于镀铬缸套。具体情况见表1、表2。
Foreign cylinder liner life of about 700000 kilometers, the general is 20 to 300000 km. My company is the highest 120,000 km, the general is 8 to 100,000 km; relatively poor only 5 to 60,000 km that is required Bingbing. Part of the engine cylinder liner with chrome, the effect is better, but the process is complex, long time, high cost and the existence of water pollution. Although some high-phosphorus cast iron and boron-containing cast iron as a liner material, but the composition is not easy to ensure that the organization is not uniform. In order to improve the life of cylinder liner, our company refers to the experiences of brother units such as Dalian Freezing Machine Factory to conduct electric heating and quenching on the inner surface of cylinder liner. The equipment and technology are simple, low cost, short cycle and dismantled after 40,000 km Prove that the effect is better than chrome liner. See Table 1 and Table 2 for details.