火力发电机组捞渣机链条断裂原因  

Reasons for chain breakage of slag scraper in thermal power generation unit

作　　者：李晶 周浩 周德 LI Jing;ZHOU Hao;ZHOU De(China First Heavy Industries Innovation Institute,Beijing 100071,China;North China Electric Power Test and Research Institute,China Datang Group Science and Technology Research Institute Co.,Ltd.,Beijing 100043,China;College of Geographical Sciences,Shanxi Normal University,Taiyuan 030031,China)

机构地区：[1]中国一重集团有限公司创新研究院,北京100071 [2]中国大唐集团科学技术研究总院有限公司华北电力试验研究院,北京100043 [3]山西师范大学地理科学学院,太原030031

出　　处：《理化检验(物理分册)》2025年第4期75-78,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某火力发电机组捞渣机链条断裂。采用宏观观察、化学成分分析、渗碳层深度测试、金相检验等方法分析了链条断裂的原因。结果表明:链条的断裂性质为疲劳断裂,链条表面渗碳工艺不到位,导致链条的抗疲劳和抗磨损能力变差,在较大载荷和交变应力的综合作用下,链条发生疲劳脆性断裂。The chain of the slag scraper of a certain thermal power generation unit broke.The causes of chain fracture were analyzed using macroscopic observation,chemical composition analysis,depth testing of the carburized layer,metallographic examination.The results show that the fracture property of the chain was fatigue fracture,and the inadequate carburizing process on the surface of chains,led to a decrease in the resistance to fatigue and wear of chains.Under the combined action of large loads and alternating stresses,the chain ultimately underwent fatigue brittle fracture.

关 键 词：捞渣机 链条 脆性断裂 疲劳 表面渗碳处理 

分 类 号：TB31[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—物理冶金]