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  本文選題：鋁涂層　切入點：熱噴涂　出處：《華東理工大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：310S不銹鋼作為環(huán)形退火爐設(shè)備的內(nèi)罩材料,由于長期使用在高溫環(huán)境下,易發(fā)生高溫氧化失效,因此本文研究了提高310S不銹鋼材料抗高溫氧化性能的方法,以及高溫條件下的鋁涂層與310S不銹鋼基體間的互擴(kuò)散機(jī)制。在金屬氧化的過程中,若金屬表面生成穩(wěn)定、致密的氧化膜,即可以起到隔離氧氣進(jìn)入基體避免金屬進(jìn)一步氧化的作用,使得金屬具有一定的抗氧化性能。鋁元素是生成優(yōu)良保護(hù)性氧化膜的首選元素,本文采用了電弧噴涂工藝和固體粉末滲鋁工藝分別在310S不銹鋼表面制備鋁涂層,在不同溫度下對鋁涂層進(jìn)行擴(kuò)散處理,制備得到了各種不同形態(tài)的擴(kuò)散鋁涂層,以提高基體材料的抗高溫氧化能力。借助于金相顯微鏡(OM)和電子顯微鏡(SEM)觀察、能譜分析儀(EDS)以及X射線衍射儀(XRD)分析等方法,分析了鋁化物涂層的組織結(jié)構(gòu)變化,基體表面擴(kuò)散層的形成以及它們對鋁元素擴(kuò)散規(guī)律的影響,并運(yùn)用俁野法(Boltzmann-Matano法)計算鋁原子在310S不銹鋼基體中的擴(kuò)散系數(shù)。將實驗得到的擴(kuò)散系數(shù)帶入有限元模型進(jìn)行數(shù)值仿真,并與實驗獲得的鋁元素在基體中的分布結(jié)果進(jìn)行對比,驗證了擴(kuò)散模型及擴(kuò)散系數(shù)的準(zhǔn)確性。最后,對擴(kuò)散試樣和未擴(kuò)散試樣分別進(jìn)行高溫氧實驗及氧化動力學(xué)分析,獲得最佳的表面處理工藝來提高310S不銹鋼材料的抗高溫氧化性能。
[Abstract]:The 310s stainless steel is used as the inner cover material of the annular annealing furnace. Because it is easy to be oxidized at high temperature for a long time, the method of improving the high temperature oxidation resistance of the 310S stainless steel is studied in this paper. And the interdiffusion mechanism between aluminum coating and 310S stainless steel substrate at high temperature. In the process of metal oxidation, a stable and dense oxide film is formed on the metal surface. That is, the oxygen can be isolated into the matrix to avoid further oxidation of the metal, and the metal has a certain oxidation resistance. Aluminum is the first choice element to form a good protective oxide film. In this paper, aluminum coatings were prepared on 310s stainless steel by arc spraying process and solid powder aluminizing process, and various kinds of diffused aluminum coatings were prepared by diffusion treatment at different temperatures. In order to improve the oxidation resistance of matrix materials at high temperature, the microstructure changes of aluminized coatings were analyzed by means of metallographic microscope (OM) and electron microscope (SEM) observation, energy spectrum analyzer (EDS) and X-ray diffractometer (XRD) analysis. The formation of diffusion layers on the matrix surface and their influence on the diffusion law of aluminum, The diffusion coefficient of aluminum atoms in 310s stainless steel matrix is calculated by using the Minamata field method and Boltzmann-Matano method. The diffusion coefficient obtained from the experiment is brought into the finite element model for numerical simulation, and the results are compared with the experimental results of the distribution of aluminum in the matrix. The accuracy of diffusion model and diffusion coefficient is verified. Finally, the high temperature oxygen test and oxidation kinetics analysis of diffusion and non-diffusion samples are carried out, respectively. The best surface treatment process was obtained to improve the oxidation resistance of 310s stainless steel at high temperature.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TG174.4

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相關(guān)期刊論文 前1條

1 周海軍;馮倩;闞艷梅;高樂;董紹明;;滲硅工藝制備ZrB_2-SiC涂層的微觀結(jié)構(gòu)與抗氧化性能（英文）[J];無機(jī)材料學(xué)報;2013年10期

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本文編號：1649754