中国特种设备安全
中國特種設備安全
중국특충설비안전
CHINA SPECIAL EQUIPMENT SAFETY
2015年
6期
72-75
,共4页
临氢管道%晶间腐蚀%失效分析
臨氫管道%晶間腐蝕%失效分析
림경관도%정간부식%실효분석
Hydrogen pipeline%Intergranular corrosion%Failure analysis
通过对断裂钢管的宏观断口、化学成分、微观组织、断口形貌等方法查找该管道的断裂原因。结果表明：该管道材质为0Cr18Ni9（美标牌号为304）。断口为典型的脆性断口，细晶区碳化物聚集严重，在金相制样浸蚀过程中晶粒大量脱落，细晶区敏化程度严重，热影响区的敏化作用是导致发生晶间腐蚀断裂的主要原因。
通過對斷裂鋼管的宏觀斷口、化學成分、微觀組織、斷口形貌等方法查找該管道的斷裂原因。結果錶明：該管道材質為0Cr18Ni9（美標牌號為304）。斷口為典型的脆性斷口，細晶區碳化物聚集嚴重，在金相製樣浸蝕過程中晶粒大量脫落，細晶區敏化程度嚴重，熱影響區的敏化作用是導緻髮生晶間腐蝕斷裂的主要原因。
통과대단렬강관적굉관단구、화학성분、미관조직、단구형모등방법사조해관도적단렬원인。결과표명：해관도재질위0Cr18Ni9（미표패호위304）。단구위전형적취성단구，세정구탄화물취집엄중，재금상제양침식과정중정립대량탈락，세정구민화정도엄중，열영향구적민화작용시도치발생정간부식단렬적주요원인。
In the present paper, the macroscopic, chemical composition, the microstructure and fracture morphology of fracture of the hydrogen pipelines were measured and analyzed. The results showed that the main reasons of the hydrogen pipelines fracture was intergranular corrosion by sensitization in the heat affected zone. Fracture was a typical rock-candy structure, carbide crystalline region had aggregated with countless carbides, and a great deal of crystalline grain had dropped in metallographic sample preparation. The stainless steel tubes was 0Cr18Ni9(304 stainless steel is USA).
