其阻氫性能的影響①
(1.北京航空航天大學(xué)理學(xué)院材料物理與化學(xué)研究中心,北京100083; 2.西北工業(yè)大學(xué)凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室,西安710072)
摘 要: 采用X射線衍射儀、掃描電鏡及熱充氫等方法,研究了激光重熔對不銹鋼表面熱噴涂鋁涂層的微觀結(jié)構(gòu)及其阻氫性能的影響。結(jié)果表明：激光重熔后涂層組織均勻、致密,主要由AlFe(Ni,Cr)固溶體、CrFeNi奧氏體等相組成,而且涂層與基體形成了良好的冶金結(jié)合。此外,激光表面重熔后涂層的阻氫性能亦得到改善。
關(guān)鍵字: 激光表面重熔;微觀結(jié)構(gòu);阻氫性能
（1. Center of Materials Physics and Chemistry, College of Science,Beijing University of Aeronautics and Astronautics, Beijing100083, P.R.China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi′an 710072, P.R.China）
Abstract:The effects of laser surface remelting on the microstructure and hydrogen permeation resistance of thermal spraying aluminum coatings on the surface of austenitic stainless steel was studied by using XRD, SEM and thermal hydrogen-charging. The results indicate that the microstructure of laser remelted coating is both homogeneous and dense, the main phases of laser remelted coating are AlFe(Ni, Cr), CrFeNi and so on. Also metallurgical bond between coating and base metal has been formed. Moreover, the hydrogen permeation resistance of aluminum coatings was improved to a certain extent after laser remelting.
Key words: laser surface remelting; microstructure; hydrogen permeation resistance
