压力容器
壓力容器
압력용기
Pressure Vessel Technology
2015年
10期
61-66
,共6页
三通%应力腐蚀%应力疲劳%开裂%失效
三通%應力腐蝕%應力疲勞%開裂%失效
삼통%응력부식%응력피로%개렬%실효
tee%stress corrosion%stress fatigue%crack%failure
某石化企业制氢装置中，一材料为321不锈钢的三通管开裂，零件失效。采用金相、电镜、能谱检验和硬度测试等方法对裂纹断口进行了分析，通过应力分析、应力腐蚀环境的分析、管内流体介质的动态数值模拟，分析判断出管道上裂纹出现的机理是应力腐蚀与应力疲劳共同作用的结果。
某石化企業製氫裝置中，一材料為321不鏽鋼的三通管開裂，零件失效。採用金相、電鏡、能譜檢驗和硬度測試等方法對裂紋斷口進行瞭分析，通過應力分析、應力腐蝕環境的分析、管內流體介質的動態數值模擬，分析判斷齣管道上裂紋齣現的機理是應力腐蝕與應力疲勞共同作用的結果。
모석화기업제경장치중，일재료위321불수강적삼통관개렬，령건실효。채용금상、전경、능보검험화경도측시등방법대렬문단구진행료분석，통과응력분석、응력부식배경적분석、관내류체개질적동태수치모의，분석판단출관도상렬문출현적궤리시응력부식여응력피로공동작용적결과。
In the middle temperature shift gas heat exchanger of the hydrogen plant of a petrochemical company,some cracks were found in the upper tube of a tee made from 321 stainless steel material,by which,the part failure was caused and the production was interrupted.These cracks were located on the straight pipe nearby the welded joint.The cracks were analyzed through metallographic,scanning electron microscope,energy spectrum detections and hardness test.The stresses analysis,the stress corrosion envi-ronment analysis,the dynamic numerical simulation analysis for fluid in the pipe was done then.The mechanism of crack is the co-action of stress corrosion and stress fatigue,where corrosion elements are ex-ist and the crack position of the pipe is impacted by fluid fluctuation.
