| K62N68A高强度螺栓失效机理分析 |
| |
| 引用本文： | 董红年,王英华,王文欣,李思萌.K62N68A高强度螺栓失效机理分析[J].华北电力技术,2012(2):52-56. |
| |
| 作者姓名： | 董红年 王英华 王文欣 李思萌 |
| |
| 作者单位： | 1. 广东大唐国际潮州发电有限责任公司,广东潮州,515723
2. 华北电力科学研究院有限责任公司,北京,100045 |
| |
| 摘 要： | K62N68A材料具有较高的强度和优良的抗应力松弛性能,随着电站机组参数的不断提高,广泛应用于超超临界机组汽轮机进汽阀螺栓材料。针对某发电公司1 000 MW超超临界机组主汽阀、调节汽阀断裂的螺栓失效问题,通过宏观形貌、断口扫描电镜、化学成分、常温与高温力学性能、金相组织分析等试验,得出螺栓失效的原因。
|
| 关 键 词： | 1000MW机组 高强度螺栓 镍基螺栓 失效机理 |
Analysis on Failure Mechanism of High Strength Bolt Made of K62N68A |
| |
| Dong Hong-nian
,
Wang Ying-hua
,
Wang Wen-xin
,
Li Si-meng.Analysis on Failure Mechanism of High Strength Bolt Made of K62N68A[J].North China Electric Power,2012(2):52-56. |
| |
| Authors: | Dong Hong-nian Wang Ying-hua Wang Wen-xin Li Si-meng |
| |
| Affiliation: | 1. Guangdong Datang International Chaozhou Power Generation Co. Ltd. , Chaozhou 515723, China ; 2. North China Electric Power Research Institute Co. Ltd. , Beijing 100045, China) |
| |
| Abstract: | K62N68A was widely used in bolt of inlet valve of ultra-super critical steam turbine along with increase of equipment parameter in power plant for its high strength and excellent anti-stress relaxation property. According to bolt failure of main steam valve and governing valve in one 1 000 MW ultra-super critical steam turbine, macro-scopi- cal morphology, SEM observation on fracture surface, chemical content, mechanical properties under normal tempera- ture and high temperature and metallographic structure were analyzed and failure cause was obtained. |
| |
| Keywords: | 1000 MW unit high strength bolt nickel-based bolt failure mechanism |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
