压力容器
壓力容器
압력용기
2013年
11期
52-55
,共4页
封头%开裂%蒸汽管道%失效分析
封頭%開裂%蒸汽管道%失效分析
봉두%개렬%증기관도%실효분석
head%fracture%steam pipe%failure analysis
为了查明高温蒸汽管道封头开裂失效原因，针对封头进行了开裂形貌、裂纹断口和金相组织等检测分析。结果表明：封头开裂的失效性质是热疲劳，造成封头开裂的主要原因是雨水长期泄漏对高温封头外壁急冷产生热应力，封头锻造工艺造成的组织缺陷也促进了裂纹的萌生和扩展。结合现场实际情况，提出了一些建议措施，避免了类似失效事故的发生。
為瞭查明高溫蒸汽管道封頭開裂失效原因，針對封頭進行瞭開裂形貌、裂紋斷口和金相組織等檢測分析。結果錶明：封頭開裂的失效性質是熱疲勞，造成封頭開裂的主要原因是雨水長期洩漏對高溫封頭外壁急冷產生熱應力，封頭鍛造工藝造成的組織缺陷也促進瞭裂紋的萌生和擴展。結閤現場實際情況，提齣瞭一些建議措施，避免瞭類似失效事故的髮生。
위료사명고온증기관도봉두개렬실효원인，침대봉두진행료개렬형모、렬문단구화금상조직등검측분석。결과표명：봉두개렬적실효성질시열피로，조성봉두개렬적주요원인시우수장기설루대고온봉두외벽급랭산생열응력，봉두단조공예조성적조직결함야촉진료렬문적맹생화확전。결합현장실제정황，제출료일사건의조시，피면료유사실효사고적발생。
In order to find out the cracking causes of a head of high pressure steam pipe,the head was an-alyzed for the cracking morphology analysis,the fracture analysis and microstructure analysis.The results showed that the cracking failure character of the head was thermal fatigue.The main factor of the head cracking cause was the leakage of rain for a long time on high temperature head outer wall quench and produce thermal stress.Head forging process produce microstructure defects that promote the crack initia-tion and propagation.Combining with the actual situation,remedial measures were taken to avoid the simi-lar failure accidents.
