激光表面重熔对热喷涂铝涂层微观结构及其阻氢性能的影响

Effects of laser surface remelting on microstructure and hydrogen permeation resistance of thermal spraying aluminum coatings

采用X射线衍射仪、扫描电镜及热充氢等方法 ,研究了激光重熔对不锈钢表面热喷涂铝涂层的微观结构及其阻氢性能的影响。结果表明 :激光重熔后涂层组织均匀、致密 ,主要由AlFe(Ni,Cr)固溶体、CrFeNi奥氏体等相组成 ,而且涂层与基体形成了良好的冶金结合。此外 。

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.