反应器分布器分布管断裂分析  

Fracture Analysis of Distributing Pipes of Fractured Reactor

作　　者：宋文明[1] 张玉福[1] 张金伟[1] 杨贵荣[2,3] 钟彦平[1] 马颖[2,3] 郝远[2,3] 

机构地区：[1]兰州石油机械研究所,甘肃兰州730050 [2]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [3]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《材料开发与应用》2008年第5期67-70,共4页Development and Application of Materials

摘　　要：对断裂反应器的分布管进行宏观、金相微观组织、化学成分分析、硬度检验、相结构分析和断口分析。结果表明,在分布器的工况条件下,分布管外表面氧化腐蚀,导致表面晶界氧化裂纹萌生;管内介质NH3分解导致内壁渗氮,生成氮化物材质脆化;在震动作用下,由管外壁起裂,导致失效。The macro-appearance, micro-structure, chemical component, hardness, phases composition and the appearance of fracture for distributing pipes of fractured reactor were investigated. The results show that the oxidation corrosion happened on outside surface of distributing pipe ,which resulted in the oxidation crack at the interface of crystal on the surface of the distributing pipe when the distributing pipe of reactor worked on its running conditions. The decomposing of NH3 induced the nitriding on the inside surface of the pipes. Nitride was synthesized conformed from the microstructure and chemical results,which belong to the brittle phases. The outside surface of pipe tends to crack under the condition of vibration, which induced the failure of the distributing pipes of fractured reactor.

关 键 词：分布管 表面氧化 渗氮脆化 

分 类 号：TG115.21[金属学及工艺—物理冶金]