对断裂失效发电机定子进行分析，结果表明由于紫铜导线形变加工后退火再结晶组织不完全，在受拉应力形变最大处存在微裂纹形核的可能性，致使在长期运行中，空气中的Ｏ２不断由此扩散到导线内部与Ｃｕ形成Ｃｕ２Ｏ，同时环境中所含的Ｈ２和ＣＯ等还原性气体不断将形成的Ｃｕ２Ｏ还原成Ｃｕ，并释放出Ｈ２Ｏ和ＣＯ２，产生沿晶裂纹，最终导致该导线断裂。
The source of fracture failure of the Cu wire used in generator stator has been analyzed. ?he results sh that'since full recrystallization strucm of Cu has not been obtained by annealing after def-tion so sane micrc-cracks may be nuclear. Hence Q in the air may diffuse through along the micro-cracks and form GO with Cu, then Cu20 are reduced to Cu by fi and 0,meanwhile relax fiO and Q along grain baundary or micmcracks, results in intmular cracks and cracks elongating. Finally the precautionary measures have been suggested.
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