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Fluidized Bed CrN Coating Formation on Prenitrocarburized Plain Carbon Steel

机译:预氮碳共渗普通碳钢上的流化床CrN涂层形成

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CrN coatings were formed on plain carbon steel by prenitrocarburizing, followed by thermoreactive deposition and diffusion (TRD) in a fluidized bed furnace at 570 deg C. During TRD, Cr was transferred from Cr powder in the fluidized bed to the nitrocarburized substrates by gas-phase reactions initiated by reaction of HC1 gas with the Cr. The microstructural processes occurring in the white layer, caused by N diffusion toward the surface during this stage were studied. This study compares TRD atmospheres employing inert gas and HC1 or inert gas, H2, and HC1. Surface characterization was performed by scanning electron microscopy (SEM), x-ray diffraction (XRD), and glow-discharge optical-emission spectroscopy (GDOES).
机译:在普通碳素钢上通过预氮碳共渗形成CrN涂层,然后在流化床炉中在570℃下进行热反应沉积和扩散(TRD)。在TRD期间,Cr通过气化从流化床中的Cr粉末转移到氮碳共渗的基材上。 HCl气体与Cr的反应引发的相反应。研究了在此阶段中由N向表面扩散导致的在白色层中发生的微观结构过程。本研究比较了使用惰性气体和HCl或惰性气体,H2和HC1的TRD气氛。通过扫描电子显微镜(SEM),X射线衍射(XRD)和辉光放电发射光谱(GDOES)进行表面表征。

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