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首页> 外文会议>The 4th Australia-China-Japan joint symposium on iron and steelmaking >Occurrence State of Niobium and Titanium in High Pure Ferritic Stainless Steel
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Occurrence State of Niobium and Titanium in High Pure Ferritic Stainless Steel

机译：高纯铁素体不锈钢中铌和钛的赋存状态

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摘要

As stabilization elements added into high pure ferritic stainless steels,niobium and titanium react with carbon and nitrogen to form carbonitrides and promote their mechanical properties and corrosion resistance.Occurrence state of niobium and titanium is the first problem need to be solved.Therefore,combined with thermodynamic calculation by FactSage software,occurrence state of niobium and titanium in high pure ferritic stainless steel was investigated by optical microscope,scanning electron microscope,transmission electron microscope and energy disperse spectroscope.Results show that niobium and titanium exist as carbonitrides and solid solution except for a certain quantity titanium oxides.The additions of niobium,titanium,carbon and nitrogen have great effect on the precipitation temperature of carbonitrides and titanium oxides.Titanium oxides precipitate firstly and the precipitation temperature is higher than the liquidus of steel,and its carbonitrides precipitate secondly at the temperature near the liquidus,carbonitrides of niobium precipitate at a relatively lower temperature below 1200℃.
机译：铌和钛作为添加到高纯铁素体不锈钢中的稳定元素，会与碳和氮反应形成碳氮化物，并提高其机械性能和耐蚀性。首先要解决的问题是铌和钛的存在状态。因此，结合使用用FactSage软件进行热力学计算，用光学显微镜，扫描电子显微镜，透射电子显微镜和能谱仪研究了高纯铁素体不锈钢中铌和钛的存在状态。结果表明，铌和钛以碳氮化物和固溶体的形式存在，除了铌，钛，碳和氮的添加对碳氮化物和钛氧化物的析出温度有很大影响。钛氧化物首先析出，且析出温度高于钢的液相线，其次是碳氮化物析出。在在液相线附近的温度下，铌的碳氮化物在低于1200℃的相对较低的温度下沉淀。

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