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本文探讨了河门口电厂主蒸汽管道阀门螺栓断裂的主要原因是初紧力过大。过大的初紧力,一方面会加速材料脆化;另一方面在初紧时个别螺栓已产生微裂纹,造成过早断裂。最后提出了改善措施。
This article discusses the main reason why the main steam pipe valve bolt of Hemenkou Power Plant is broken when the initial tightening force is too large. Excessive initial tightening force will accelerate material embrittlement on the one hand; on the other hand, individual bolts at the beginning of tightening will generate micro-cracks, causing premature rupture. Finally proposed improvement measures.