活塞铝合金综合性能的研究讲解.docxVIP

设计型综合实验实验名称：活塞铝合金综合性能的研究 学 校： 学 院：材料与化工学院 专 业：金属材料工程 班 级： 学 号： 姓 名： 实验组员： 指导老师 实验时间：2016.08.31—2016.10.15摘要：活塞是发动机的心脏，时其关键零部件之一。由于活塞工作条件恶劣，所以对其性能要求很高。铸造铝硅合金具有良好的综合性能，故本课题以铝硅合金为基础做了两组对照试验：一组是对浇注成型的试样进行金相分析，另一组时对固溶时效处理后的试样进行金相显微分析，并对比两组金相组织。第一组未精炼的试样组织其铸造组织缺陷多而明显，精炼后的使用组织由于铸型的预热和浇注温度的提高，缺陷铸件减少，且有明显的CuAl2、Al2Si等相。固溶时效处理过程中炉温过高，导致了试样过烧。关键词：活塞；铝硅合金；固溶时效；过烧Abstract:As one of the important components,a pistons is the hurt of automobile engine.The high demand of pistons was due to abominable operating conditions.The nice combination property was provided with casting Al-Si alloy,and there are two groups of control experiment was based on Al-Si alloy in project:one to metallographic analysis with contact molding sample and another to observe metallographic structure with the specimen was be solid solution and aging.There are many obvious casting defect of sample structure wasn’t refined in the first group.The defect decreases with the increasing pouring temperature,of sample structure after the refine,and the phase of CuAl2、Al2Si was apparent.Oversintering was leaded to higher furnace temperature in the solid solution and aging.Keywords:pistons;Al-Si alloy;solid solution and aging;oversintering 目录绪论......................................................1选题....................................................1 1.1选题背景和目的.......................................1 1.2课题的研究内容.......................................12.活塞铝合金概述..........................................2 2.1铝合金概述...........................................2 2.2活塞简述.............................................22.2.1活塞定义.........................................22.2.2活塞工作条件.....................................22.2.3活塞性能要求.....................................23.铝合金组成成分..........................................3 3.1各合金元素对铝合金的影响.............................3