CAJ | 학술논문

针对某设备的真空薄膜蒸发器发生个别叶片失效断裂现象，对断裂叶片进行了断口金相检验，从宏观和微观两方面深入分析了失效原因，探讨裂纹的产生、发展机理。指出叶片失效是加工缺陷和在交变应力的作用下低周疲劳破坏引起的，激励源为叶片与内壁碰摩时产生的瞬时碰撞力与摩擦力，使得叶片在振动应力下发生疲劳断裂，并结合工况给出具体改进措施，提高了设备可靠性。
침대모설비적진공박막증발기발생개별협편실효단렬현상，대단렬협편진행료단구금상검험，종굉관화미관량방면심입분석료실효원인，탐토렬문적산생、발전궤리。지출협편실효시가공결함화재교변응력적작용하저주피로파배인기적，격려원위협편여내벽팽마시산생적순시팽당력여마찰력，사득협편재진동응력하발생피로단렬，병결합공황급출구체개진조시，제고료설비가고성。
Since vacuum thin-iflm evaporator in some facility has individual blade failure fracture, metal urgical check is made on fracture surface of the blade and its failure causes are thoroughly analyzed from macro and microcosmic aspects. Crack initiation and growth mechanism is discussed in this paper. It points out that blade failure is caused by processing defects and low-cycle fatigue rapture under alternating stress, and excitation sources were transient impact force and friction occurring when blade and internal wal impacted and rubbed with each other, which brought blade under vibration stress fatigue fracture. Speciifc modiifed measures are provided in the paper by virtue of operating conditions and thus reliability of facility is improved.