论文部分内容阅读
近年来,柴油机要求更高的性能和更长的寿命。由于气缸爆发压力高,活塞销衬套的工作负荷和温度变得更高。因此要求活塞销衬套具有高承载能力、耐磨性和耐腐蚀性。为了改善铜衬套材料的耐腐蚀性,研究了铜合金中添加元素的效果。研究发现,在铜中加入镍可降低铜合金的硫腐蚀。此外,还得知可以通过传统的烧结方法来生产铜镍合金。尝试在铜基体中加入硬颗粒来提高耐磨性。研究的首要目标是确定硬颗粒对耐磨性和切削加工工艺性的影响。研究发现,在铜基体中加入一种硬颗粒时耐磨性有所提高,但切削加工性却变差。为了解决这个问题,试验同时添加两种硬颗粒,细的AIN和Fe3P颗粒。结果是成功地提高了耐磨性,又不使切削加工性变差。在本研究的基础上成功地开发了活塞销衬套新材料,有效地提高了高性能柴油机活塞销衬套的耐磨性和耐腐蚀性。
In recent years, diesel engines demand higher performance and longer life. As the cylinder burst pressure is high, the working load and temperature of the piston pin bushing become higher. Therefore, the piston pin bushings are required to have high load carrying capacity, wear resistance and corrosion resistance. In order to improve the corrosion resistance of copper lining material, the effect of adding elements in copper alloy has been studied. The study found that the addition of nickel in copper can reduce the copper alloy sulfur corrosion. In addition, it is known that it is possible to produce a copper-nickel alloy by a conventional sintering method. Try to add hard particles in the copper matrix to improve the wear resistance. The primary goal of the study was to determine the effect of hard particles on wear resistance and machinability. It has been found that when a hard particle is added to a copper matrix, the abrasion resistance increases but the machinability deteriorates. In order to solve this problem, two hard particles, fine AIN and Fe3P particles were added simultaneously. As a result, wear resistance is successfully improved without deteriorating machinability. Based on the research, the piston pin bushing new material has been successfully developed, which effectively improves the wear resistance and corrosion resistance of the piston pin bushing of high performance diesel engine.