材料期刊网

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，空气中的不断由此扩散到导线内部与Cu形成同时环境中所含的和CO等还原性气体不断将形成的还原成Cu，并释放出产生沿晶裂纹，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. The results show that since full recrystallization structure of Cu has not been obtained by annealing after deformation so some micro-cracks may be nuclear. Hence in the air may diffuse through along the micro-cracks and form are reduced to Cu by and CO, meanwhile relax boundary or micro-cracks, results in intergranular cracks and cracks elongating. Finally the precautionary measures have been suggested.