内蒙古电力技术
內矇古電力技術
내몽고전력기술
INNER MONGOLIA ELECTRIC POWER
2014年
5期
41-44
,共4页
张涛%田峰%贺飞雄%侯国新%王文豪
張濤%田峰%賀飛雄%侯國新%王文豪
장도%전봉%하비웅%후국신%왕문호
300 MW汽轮机%低压转子%0Cr17Ni4Cu4Nb动叶片%腐蚀坑%腐蚀疲劳断裂
300 MW汽輪機%低壓轉子%0Cr17Ni4Cu4Nb動葉片%腐蝕坑%腐蝕疲勞斷裂
300 MW기륜궤%저압전자%0Cr17Ni4Cu4Nb동협편%부식갱%부식피로단렬
300 MW steam turbine%low-pressure blade%0Cr17Ni4Cu4Nb rotor blade%corrosion pits%corrosion-fatigue cracking
某电厂300 MW汽轮发电机组在运行过程中发生低压转子0Cr17Ni4Cu4Nb动叶片断裂事故。利用化学成分分析、力学性能检测、显微组织分析及断口分析等方法对叶片断裂原因进行了综合分析。结果表明：叶片断裂的主要机理为腐蚀疲劳断裂，即叶片在循环激振力作用下沿腐蚀坑形成疲劳裂纹并扩展，直至断裂。针对本次叶片断裂原因，提出应加强机组汽水品质监测及对叶片安装过程和运行状态进行监督等建议。
某電廠300 MW汽輪髮電機組在運行過程中髮生低壓轉子0Cr17Ni4Cu4Nb動葉片斷裂事故。利用化學成分分析、力學性能檢測、顯微組織分析及斷口分析等方法對葉片斷裂原因進行瞭綜閤分析。結果錶明：葉片斷裂的主要機理為腐蝕疲勞斷裂，即葉片在循環激振力作用下沿腐蝕坑形成疲勞裂紋併擴展，直至斷裂。針對本次葉片斷裂原因，提齣應加彊機組汽水品質鑑測及對葉片安裝過程和運行狀態進行鑑督等建議。
모전엄300 MW기륜발전궤조재운행과정중발생저압전자0Cr17Ni4Cu4Nb동협편단렬사고。이용화학성분분석、역학성능검측、현미조직분석급단구분석등방법대협편단렬원인진행료종합분석。결과표명：협편단렬적주요궤리위부식피로단렬，즉협편재순배격진력작용하연부식갱형성피로렬문병확전，직지단렬。침대본차협편단렬원인，제출응가강궤조기수품질감측급대협편안장과정화운행상태진행감독등건의。
The low-pressure rotor 0Cr17Ni4Cu4Nb blade of a 300 MW steam turbine was broken when the unit was running. The methods of chemical composition analysis, mechanical properties measurement, microstructure observation and fracture patterns examination were used in order to analyze fracture cause of blade. The results showed that the main fracture mechanics of blade was corrosion-fatigue cracking. The cracks generated from corrosion pits and extended when the circulate stress was acted on blade. Suggested to monitor the steam-water quality and running state in installing and running.
