电站锅炉过热器管失效规律研究  

Failure Regularity of Superheater Tube in Power Plant Boiler

作　　者：黄鑫[1] 丁克勤[2] 赵军[1] 

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]中国特种设备检测研究院,北京100013

出　　处：《失效分析与预防》2012年第4期217-220,共4页Failure Analysis and Prevention

摘　　要：过热器管是锅炉受热面中工作环境最恶劣的炉管,频繁地出现由材料断裂造成的泄漏与爆管失效事故,对电力企业造成了严重的经济损失。根据过热器管不同的失效原因,将过热器管的断裂失效分为韧性断裂、脆性断裂、蠕变断裂及腐蚀断裂。通过对过热器管失效实际案例进行分析,建立了过热器管失效树,同时概括了引起失效的损伤因素。为避免在生产过程中出现引起过热器管失效的重要损伤因素,在设计、运行、维护等环节提出了相应的防范措施。At the boiler heating surface, superheater tubes are subjected to the worst working environment. As a result, leakage and burst frequently take place due to material fracture. These accidents also increase economic losses of power plants. According to different failure reasons, superheater tubes rupture failure modes can be divided into ductile fracture, brittle fracture, creep rupture and corrosion fracture. Through analysis on the actual failure cases, failure trees of superheater tube are built to summarize the injury factors. For avoiding serious injury factors in the process of production, corresponding preventive measures are presented for design, operation and maintenance.

关 键 词：过热器管 断裂失效 失效模式 失效树 损伤因素 

分 类 号：V258[一般工业技术—材料科学与工程] TB332[航空宇航科学与技术—航空宇航制造工程]