全铝发动机缸体的制备及缸套内表面处理工艺研究  

Fabrication of the all-aluminum engine cylinder and the treatment process of the internal surface of the cylinder liner

作　　者：林雪冬[1] 卢建波[1] 孙建[1] 彭敏 张荣[1] LIN Xue-dong;LU Jian-bo;SUN Jian;PENG Min;ZHANG Rong(College of Mechanical Engineering, Chongqing Vocational Institute of Engineering, Chongqing 402260, Chin)

机构地区：[1]重庆工程职业技术学院机械工程学院,重庆402260

出　　处：《轻合金加工技术》2018年第4期46-51,共6页Light Alloy Fabrication Technology

基　　金：重庆市教委科研项目资助(KJ1503310)

摘　　要：采用高压压铸对离心铸造制备的自生初生Si、Mg_2Si颗粒增强Al-Si-Mg复合材料汽缸套-铝合金缸体进行压铸成型,获得全铝发动机缸体。分别采用传统油石珩磨工艺及"油石珩磨-SiC颗粒毛毡抛光法"对缸套内表面进行表面处理,并对缸体进行台架试验。结果表明:采用传统珩磨工艺处理后,缸套内表面粗糙度较高,无法达到设计要求;采用"油石珩磨-SiC颗粒毛毡抛光法"联合处理后,缸套内表面形成网纹效果良好,表面粗糙度Ra=0.32μm,符合企业技术规范。台架试验后在缸体内孔仅观察到摩擦印痕,发动机运行正常,其最大功率、最大转矩分别达到了8.18 kW,10.77 N·m。The all-aluminum engine cylinder was obtained by the high pressure die-cast- ing, resulting from the A1-Si-Mg cylinder liner reinforced with Si/Mg2 Si particles fabricated by centrifugal casting. The traditional honing process and a new method of ＂SiC particles-- felt grinding and polishing＂ were used, respectively, to carry out the surface treatment on the inner hole of the cylinder block （cylinder liner）. Then, a bench test was performed for the engine assembled with the all-aluminum cylinder. The results show that the surface roughness of the cylinder bore is high by using the traditional honing process and cannot meet the design requirements; While a good surface crazing effect is obtained on the inner hole of the cylinder with the new method, the surface roughness Ra = 0.32 μm, and it can meet en- terprise technical specifications. The maximum engine runs normally and only friction marks are observed after the bench test. The maximum engine power output and torque of the en- gine reach 8.18 kW and 10.77N km. resneetively.

关 键 词：油石珩磨-SiC颗粒毛毡抛光 台架试验 A1-Si-Mg复合材料汽缸套 全铝发动机缸体 

分 类 号：TG146.21[一般工业技术—材料科学与工程]