双相321不锈钢管的氧化失效行为  

Oxidation Failure of a Duplex Type 321 Stainless Steel Tube

作　　者：田青超[1] 林良道[1] 陈家光[1] 蔡海燕[1] 

机构地区：[1]宝钢股份有限公司技术中心,上海201900

出　　处：《机械工程材料》2004年第2期51-54,共4页Materials For Mechanical Engineering

摘　　要：321不锈钢管被用在热交换器中,当温度在约700℃时,钢管外表面氧化膜严重脱落。在热空气中进行了恒温氧化模拟试验,使用电子探针和X射线衍射仪等设备对钢管表面进行了研究,结果表明:不锈钢管中γ和α两相共存是氧化膜脱落的根本原因。WTStainless steel 321 is used in a heat exchanger. The oxide layer on the steel tube scaled off at a service temperature of about 700℃. Oxidation experiment was carried out in a hot-air furnace. Electron probe microanalyser, X-ray diffractometer were employed to investigate the surface of specimens'. It is concluded that the coexistence of α and γ phases in the steel is responsible for the scaling of oxide layers.

关 键 词：321奥氏体不锈钢 氧化 失效分析 

分 类 号：TG142.71[一般工业技术—材料科学与工程]