国产与进口TP310HNbN钢抗蒸汽氧化行为对比

Steam Oxidation Resistance Behavior of Domestic and Imported TP310HNBN Steel at 650℃

对国产与进口TP310HNbN钢在650℃下进行不同时间(100,200,410,650,1000 h)的蒸汽氧化试验,通过钢管内壁氧化膜组成、形貌分析,对比研究了二者的抗蒸汽氧化行为。结果表明:随着氧化时间延长,国产试验钢氧化膜由断续状变为连续状,形成了厚薄不均的双层结构,氧化膜外层存在孔洞,内层较为致密,而进口试验钢氧化膜在整个氧化过程中致密且较薄,厚度均匀;国产试验钢形成保护性能较差的铁氧化物,进口试验钢形成可以阻断氧化过程的铬氧化物;进口TP310HNbN钢的抗蒸汽氧化性能优于国产TP310HNbN钢。

Steam oxidation tests of domestic and imported TP310HNbN steel were carried out at 650℃for 100,200,410,650,1000 h.The steam oxidation resistance behavior of both was studied in contrast by the morphology,composition analysis of the inner wall of steel pipe.The results show that with the extension of oxidation time,the oxide film of domestic test steel changed from discontinuous to continuous,forming a double-layer structure with uneven thickness,and there were holes in the outer layer of the oxide film,and the inner layer was relatively dense.The oxide film of imported test steel was dense and thin during the whole oxidation process,and the thickness of the oxide film was even.The domestic test steel formed iron oxides with poor protective properties at high temperature,and the imported test steel formed chromium oxides those could block the oxidation process.The oxidation property of imported TP310HNbN steel was better than that of domestic TP310HNbN steel.