电厂锅炉防护用两种镍基合金涂层高温氧化行为研究  

Oxidation Behaviors of Two Nickel-based Alloy Coatings Used in Power Plants at High Temperatures

作　　者：高慎富 何祥义 李学锋[3] 

机构地区：[1]泰安立人热电有限责任公司,山东泰安271204 [2]泰安市东山能源技术工程有限公司,山东泰安271000 [3]北京有色金属研究总院,北京100088

出　　处：《山东电力技术》2006年第2期9-11,共3页Shandong Electric Power

摘　　要：采用增重法对铬含量分别为30%和40%-45%的两种常用于电厂锅炉受热面管道防护的镍基合金涂层在500℃、650℃和800℃下的高温氧化行为进行了研究。并使用配有能谱分析仪的扫描电镜以及X射线衍射仪等检测设备对涂层氧化产物的形貌、成分和相组成进行了分析。发现铬含量对镍基合金涂层的抗高温氧化性能和氧化机理有着重要的影响。铬含量为40%-45%的涂层,其表面生成了连续的Cr2O3保护膜,具有相对较低的氧化速度。Thermogravimetric method was used to investigate the oxidation behavior of two nickel-based alloy coatings at 500℃, 650℃ and 800℃. One of the coatings was made from commercial NiTOCr30 alloy, the other a high-Cr-content （40- 45wt.%） nickel-based alloy newly developed in the author＇s research group. SEM and XRD were used to reveal the morphologies and compositions of the oxidation products and to determine their phase structures respectively. The experimental results indicate that the Cr content plays an important role in the coatings＇ oxidation resistance and their oxidation mechanisms. The coating made from the high-Cr alloy develops a continuous Cr2O3 layer, which can further restrain the oxidation process effectively.

关 键 词：锅炉 镍基合金涂层 高温氧化 

分 类 号：TK22[动力工程及工程热物理—动力机械及工程]