| 低合金钢尘化演化模型的建立及应用 |
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| 引用本文： | 陈成,周昌玉,胡桂明. 低合金钢尘化演化模型的建立及应用[J]. 压力容器, 2010, 27(3): 1-6. DOI: 10.3969/j.issn.1001-4837.2010.03.001 |
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| 作者姓名： | 陈成 周昌玉 胡桂明 |
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| 作者单位： | 1. 广州市特种承压设备检测研究院,广东,广州,510050
2. 南京工业大学,机械与动力工程学院,江苏,南京,210009 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 金属尘化是铁基、镍基合金在高温高碳活度环境下发生的一种灾难性腐蚀。讨论了低合金钢的尘化腐蚀,根据Hochman-Grabke机理,将腐蚀过程分为:渗碳、碳化物析出和碳化物分解3个阶段,初步建立了描述尘演化过程的数学模型。以此模型对Cr5Mo钢在600℃下、CO-H2-H2O气氛中的尘化腐蚀演化进行模拟,计算值与试验值相符,计算结果表明该模型在工程应用上具有可行性。
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| 关 键 词： | 金属尘化 低合金钢 扩散 演化模型 |
Evolution Modeling of Metal Dusting for Low Alloy Steel and Its Application |
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| CHEN Cheng,ZHOU Chang-yu,HU Gui-ming. Evolution Modeling of Metal Dusting for Low Alloy Steel and Its Application[J]. Pressure Vessel Technology, 2010, 27(3): 1-6. DOI: 10.3969/j.issn.1001-4837.2010.03.001 |
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| Authors: | CHEN Cheng ZHOU Chang-yu HU Gui-ming |
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| Affiliation: | 1.Guangzhou Special Pressure Equipment Inspection and Research Institute,Guangzhou 510050,China;2.School of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | Metal dusting is a catastrophic corrosion in Fe-based and Ni-based alloys,which occurs in the hydrocarbon atmosphere at high temperature,the process of metal dusting in low alloy steels is discussed in this paper.According to Hochman-Grabke′s mechanism,the improvement of this corrosion can be divided into three phases： carburizing,precipitating of carbide and decomposing of carbide,then a preliminary mathematical model to describe this process is established.Applying this model to simulate Cr5Mo samples subjected to attack of metal dusting at 600 ℃,in CO-H2-H2O atmosphere,the simulating result is fit for calculating metal dusting rate of experimental samples′ result,which verifying the rationality of this model in engineering application. |
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| Keywords: | metal dusting low alloy steels diffusion evolution model |
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