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May 22, 2026Discover Applied SciencesOpen Access

Fatigue fracture failure analysis and improvement research of main steam valve bolts in a 300 MW thermal power plant

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Authors

ZWZongjiang WangDCDongwa ChenWZWuwei Zhang

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Overview

Randomized trial assessed fatigue fractures in valve bolts, indicating enhanced operational reliability.

Key Points

  • The aim is to analyze fatigue fracture failures in main valve bolts and propose improvement measures.
  • On-site inspections and collection of fractured bolts
  • Scanning electron microscopy (SEM) used for microstructure analysis
  • Mechanical tests including hardness, tensile, and impact assessments
  • Identified fatigue crack initiation sites and propagation paths through SEM fractography
  • Mechanical testing confirmed material properties with deviations from design specifications
  • Proposed targeted improvement strategies that enhance reliability and operational stability

Cite This Study

Wang et al. (2026) studied this question.

synapsesocial.com/papers/6a0ff2a8d674f7c03778b36ehttps://doi.org/10.1007/s42452-026-08812-w
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