科技与创新
科技與創新
과기여창신
Science and Technology & Innovation
2015年
2期
74-75
,共2页
T91钢%焊接接头%裂纹%热影响区
T91鋼%銲接接頭%裂紋%熱影響區
T91강%한접접두%렬문%열영향구
T91 steel%welded joints%crack%heat-affected zone
某电厂600 MW亚临界机组过热器管T91焊接接头泄漏,通过对开裂部位进行一系列试验分析,结果表明,该过热器管焊接工艺执行不严格,使焊缝和热影响区产生粗大淬硬马氏体组织,在多处应力作用下产生热影响区冷裂纹,扩展形成宏观开裂失效。
某電廠600 MW亞臨界機組過熱器管T91銲接接頭洩漏,通過對開裂部位進行一繫列試驗分析,結果錶明,該過熱器管銲接工藝執行不嚴格,使銲縫和熱影響區產生粗大淬硬馬氏體組織,在多處應力作用下產生熱影響區冷裂紋,擴展形成宏觀開裂失效。
모전엄600 MW아림계궤조과열기관T91한접접두설루,통과대개렬부위진행일계렬시험분석,결과표명,해과열기관한접공예집행불엄격,사한봉화열영향구산생조대쉬경마씨체조직,재다처응력작용하산생열영향구랭렬문,확전형성굉관개렬실효。
A power plant 600 MW subcritical unit T91 superheater tubes welded joints leak through cracks parts of a series of tests, the results showed that the superheater tube welding process execution is not strict, the weld and heat affected zone to produce thick quenched hard martensite, resulting in heat affected zone cold cracking under multiple stress, extended to form a macroscopic crack failure.