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| 循环流化床锅炉风帽合金的组织及抗高温氧化性能研究 | |
| 引用本文： | 戴炎彬,游碧龙,刘少光,苏茂,赵合勇,徐玉松. 循环流化床锅炉风帽合金的组织及抗高温氧化性能研究[J]. 功能材料, 2012, 43(8): 1068-1071,1075 |
| 作者姓名： | 戴炎彬 游碧龙 刘少光 苏茂 赵合勇 徐玉松 |
| 作者单位： | 1. 江苏科技大学材料科学与工程学院,江苏镇江,212003 2. 中国石油化工股份有限公司荆门分公司,湖北荆门,448039 3. 江苏科技大学材料科学与工程学院,江苏镇江212003／浙江科得力新材料有限公司,浙江温州325029 |
| 基金项目： | 温州市工业科技研发资助项目 |
| 摘 要： | 针对循环流化床锅炉风帽的严重高温氧化腐蚀问题,研制出适用于风帽的高温合金AN1(Cr23Ni32MoNb),结合金相(OM)、X射线衍射(XRD)、场发射扫描电镜(FE-SEM)、能谱(EDS)等分析方法对风帽试样的微观组织和高温氧化性能进行了研究,并与25-20钢和316钢进行对比分析。结果表明,AN1铸态组织为典型的树枝状晶结构,由奥氏体基体和Cr23C6、NbC等晶间碳化物组成,固溶处理后,枝晶结构基本消失;1000℃氧化100h,AN1的高温氧化抗力分别为25-20钢和316钢的2.2和3.8倍;AN1氧化实验后的表层相结构主要由γ奥氏体、Cr2O3和Cr与Mn的复合氧化膜组成。 |
| 关 键 词： | 循环流化床锅炉 风帽 高温合金 高温氧化腐蚀 |
Microstructure and high temperature oxidation resistance research on air nozzle alloy of circulating fluidized bed boilers |
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| DAI Yan-bin,YOU Bi-long,LIU Shao-guang,SU Mao,ZHAO He-yong,XU Yu-song. Microstructure and high temperature oxidation resistance research on air nozzle alloy of circulating fluidized bed boilers[J]. Journal of Functional Materials, 2012, 43(8): 1068-1071,1075 | |
| Authors: | DAI Yan-bin YOU Bi-long LIU Shao-guang SU Mao ZHAO He-yong XU Yu-song |
| Affiliation: | 1(1.College of Material Science and Engineering,Jiangsu University of Science and Technology, Zhenjiang 212003,China; 2.Jingmen Branch,China Petroleum & Chemical Corporation,Jingmen 448039,China; 3.Zhejiang Cadre New Material CO.LTD,Wenzhou 325029,China) |
| Abstract: | According to the severe high-temperature oxidation problem of CFB boiler air nozzles,a new superalloy AN1(Cr23Ni32MoNb) for air nozzles had been developed.The microstructure and high temperature oxidation properties of AN1 alloy had been studied and compared with those of steel 25-20 and steel 316 by using optical microscope,Vicker-hardness measurements,X-ray refraction observation,scanning electron microscope and energy dispersion spectrum analysis.The results show that the as-cast microstructure of AN1 alloy exhibit a typical dendritic structure composed of austenite matrix and intercellular carbides such as Cr23C6 and NbC,and the dendrite disappear after being solid-solution treatment.After being exposed to 1000℃ for 100h,the high-temperature oxidation resistance of AN1 alloy is found respectively to be 2.2 and 3.8 times that of steel 25-20 and steel 316,and the surface phase structures of AN1 alloy consist of γ,Cr2O3 and composite oxide Cr-Mn. |
| Keywords: | circulating fluidized bed boiler air nozzle superalloy high-temperature oxidation |
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