摘要
通过断口宏微观观察、金相组织检查、硬度和化学成分检测,分析了GH4033螺栓断裂原因。结果表明,由于螺栓晶粒较细小,在高温及载荷作用下发生蠕变损伤,最终在应力集中处造成蠕变断裂。提出了预防螺栓断裂的方法及建议。
Based on macro and micro appearance observation ,metallurgical structure inspection, hardness and chemical composition analysis, the fracture cause for GH4033 bolt were investigated. The results showed that creep injury took place in bolt under the high temperature combined with load because of finer grain, which results in creep failure in stress concentration places. The methods and suggestions for precaution against creep failure were proposed.
出处
《中国特种设备安全》
2009年第11期62-64,共3页
China Special Equipment Safety
关键词
高强螺栓
蠕变
断裂
Macro and micro appearance observation High strength bolt Creep fracture
