含钇真空熔结NiCrBSi合金涂层组织结构的研究

Study on Structure of Vacuum Fusion Sintering NiCrBSi Alloy Coating Containing Rare Earth Yttrium

摘要:

利用电子能谱仪、X射线衍射仪、扫描电子显微镜等研究了稀土Y对真空熔结NiCrBSi合金涂层化学组成和组织结构的影响。结果表明：稀土Y改变了合金涂层的化学组成、减轻了因碳钢母材中的Fe向合金涂层扩散而造成的“稀释”现象，降低了涂层的Fe含量，基本消除了NiCrBSi合金涂层中的针状相，促进了球状相的析出和细化。含稀土Y的真空熔结NiCrBSi合金涂层还析出了新的第二相Cr7C3和Ni2B。

Abstract:

In virtue of electron energy spectrometer, X-ray diffractometer and scanning electron microscope, the effects of rare earth yttrium on chemical composition and structure of the vacuum fusion sintering NiCrBSi alloy coating were studied. The results show that rare earth yttrium changes chemical component of alloy coating and hinders the dilution of Fe for NiCrBSi alloy coating owing to the diffusion of Fe atom in alloy coating from steel matrix. Rare earth yttrium makes Fe content in alloy coating decrease, eliminates needle phase of alloy coating mostly, and gets globular phase of alloy coating deposited and refined further. New second phases Cr7C3 and Ni2B are also precipitated from vacuum fusion sintering NiCrBSi alloy coating containing rare earth yttrium.