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| 汽轮机末级动叶片水蚀损伤修复与防护试验研究 | |
| 引用本文： | 李巍,李太江,王绍东,刘庆伏,王博.汽轮机末级动叶片水蚀损伤修复与防护试验研究[J].热力发电,2011,40(1). |
| 作者姓名： | 李巍 李太江 王绍东 刘庆伏 王博 |
| 作者单位： | 1. 西安热工研究院有限公司,陕西,西安,710032 2. 华能丹东电厂,辽宁,丹东,118300 3. 华能上安电厂,河北,石家庄,050310 |
| 基金项目： | 中国华能集团科技项目(HNKJ06—G22) |
| 摘 要： | 基于电厂汽轮机末级动叶片水蚀损伤机理,对受损叶片进行手工钨极氩弧焊(GTAW)修复,并对焊接接头的组织性能进行试验。结果表明,焊缝硬度满足使用要求,焊接接头力学性能优良,焊接接头抗高周疲劳性能满足叶片工况要求。为了提高叶片抗水蚀性能,延长叶片使用寿命,对比分析了叶片超音速火焰喷涂NiCr和WC-Co金属陶瓷2种不同涂层的组织结构、机械性能、热震性能、磨粒磨损及冲蚀磨损性能。与WC-Co涂层相比,NiCr涂层具有优异的耐磨性能及抗冲蚀性能,可作为耐水蚀涂层应用在汽轮机末级动叶片上。 |
| 关 键 词： | 汽轮机 末级动叶片 水蚀 焊接修复 超音速火焰喷涂 NiCr涂层 WC-Co涂层 |
TEST STUDY ON REPAIR AND PROTECTION FOR WATER EROSION DAMAGE OF FINAL-STAGE BLADES IN STEAM TURBINES |
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| LI Wei,LI Taijiang,WANG Shaodong,LIU Qingfu,WANG Bo.TEST STUDY ON REPAIR AND PROTECTION FOR WATER EROSION DAMAGE OF FINAL-STAGE BLADES IN STEAM TURBINES[J].Thermal Power Generation,2011,40(1). | |
| Authors: | LI Wei LI Taijiang WANG Shaodong LIU Qingfu WANG Bo |
| Affiliation: | LI Wei1,LI Taijiang1,WANG Shaodong2,LIU Qingfu3,WANG Bo11.Xi'an Thermal Power Research Institute Co Ltd,Xi'an 710032,Shaanxi Province,PRC2.Huaneng Dandong Power Plant,Dandong 118300,Liaoning Province,PRC3.Huaneng Shang'an Power Plant,Shijiazhuang 050310,Hebei Province,PRC |
| Abstract: | Based on the mechanism of water erosion damage occurred on the final-stage blades in steam turbines,the damaged blades have been repaired by using gas tungesten arc welding(GTAW),and the microstructure performance of welded joints being tested.Results show that the hardness of weld joints satisfies the requirements in application,the mechanical properties of weld joints is good,the high-cycle fatigue resistant behavior of the weld joints can meet the requirement of blades in service.In order to enhance the ... |
| Keywords: | weld repair high speed oxygen fuel spraying NiCr ceramet coating WC-Co coating |
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