螺杆式制冷压缩机球墨铸铁驱动轴断裂失效分析  

Analysis on Crack Failure of Ductile Iron Driving Shaft of Screw Refrigeration Compressor

作　　者：殷志碗[1] 汤葱葱 李广州[2] 师红旗[2,3] YIN Zhi-wan;TANG Cong-cong;LI Guang-zhou;SHI Hong-qi(School of Intelligent Manufacturing,Yangzhou Polytechnic Institute,Yangzhou 225127,China;College of Materials Science and Engineering,Nanjing Technology University,Nanjing 211816,China;Suqian Advanced Materials Industry Technology Innovation Center of Nanjing Tech University,Suqian 223800,China)

机构地区：[1]扬州工业职业技术学院智能制造学院,江苏扬州225127 [2]南京工业大学材料科学与工程学院,江苏南京211816 [3]南京工业大学宿迁市新材料产业技术创新中心,江苏宿迁223800

出　　处：《材料保护》2020年第8期149-152,共4页Materials Protection

摘　　要：螺杆式制冷压缩机球墨铸铁驱动轴在使用过程中发生了断裂,造成了设备停产。为了保障安全生产,采用宏观形貌、化学成分、金相显微组织、力学性能及扫描电镜微观形貌等分析方法,对发生断裂的驱动轴进行了失效原因分析。结果表明:驱动轴外表面石墨分布较少,且二次渗碳体呈网状分布是导致驱动轴疲劳断裂的根本原因。针对分析结果建议加强对轴的生产过程监控,并对铸造和后续热处理提出了改进措施。The ductile iron driving shaft of screw refrigeration compressor was fractured in the course of use,which resulted in the shutdown of equipment. In order to ensure safe production,the failure causes were analyzed by means of macro morphology analysis,chemical composition analysis,microstructure analysis,mechanical property test and SEM micro-morphology analysis. Results showed that the distribution of graphite on the outer surface of the driving shaft was less,and the secondary cementite was in a network distribution,which was the basic reason for the fatigue fracture of the driving shaft. According to the analysis results,it was suggested that the production process of the driving shaft should be monitored and the improvement measures for casting and subsequent heat treatment were put forward.

关 键 词：驱动轴 球墨铸铁 疲劳断裂 失效分析 

分 类 号：TG111.91[金属学及工艺—物理冶金]