高强化柴油机铝活塞销孔失效分析  

Failure analysis on pin hole of enhanced diesel engine

作　　者：王星全 刘涛 王占宜 徐涛 丁文开 WANG Xingquan;LIU Tao;WANG Zhanyi;XU Tao;DING Wenkai(Binzhou Bohai Piston Co. , Ltd. ,Shandong, Binzhou 256602, China;Shaodong Province Key Laboratory of Engine Piston Cylinder Kites, Shandong, Binzhou 256602, China)

机构地区：[1]滨州渤海活塞有限公司,山东滨州256602 [2]山东省发动机活塞摩擦副重点实验室,山东滨州256602

出　　处：《内燃机与动力装置》2020年第3期52-56,62,共6页Internal Combustion Engine & Powerplant

基　　金：山东省重点研发计划(重大科技创新工程)项目(2019JZZY010114)。

摘　　要：针对某缸径为135 mm的高强化柴油机铝活塞销孔出现的异常磨损和开裂现象,综合分析活塞尺寸和探伤检测结果及材料检测结果等,结合活塞销孔失效机理,判定显微缩松是导致此次活塞销孔失效的根本原因,并对活塞铸造工艺进行优化改进。对优化后的活塞进行可靠性试验和小批量生产验证,活塞销孔没有出现失效故障,改进方案有效。In view of the abnormal wear and cracking of the aluminum piston pin hole of a 135 mm high strength diesel engine,through the comprehensive analysis including the piston sizw,flaw detection and material detection results,combined with the piston pin hole failure mechanism,it is determined that the micro shrinkage is the main cause of the failure of the piston pin hole.Based on this conclusion,the piston casting process is optimized and improved.Through the reliability test and small batch production verification of the optimized piston,it is found that the piston pin hole has no failure and the improved scheme is effective.

关 键 词：铝活塞 销孔 失效 显微缩松 金相组织 

分 类 号：TK423.33[动力工程及工程热物理—动力机械及工程]