用N~+离子束将Cr元素混合于Cr4Mo4V钢形成新的表面合金层。通过FeCl_3浸泡试验和在0.1mol/L NaCl醋酸—醋酸钠pH5.9缓冲溶液中的极化试验,考察了抗局部腐蚀(点蚀)的能力;同时在H_2SO_4溶液中考察了抗均匀腐蚀的能力。 对混层作的X射线衍射,TEM和XPS微观分析辩明,这层与基体混合良好的表面合金形成晶粒高度细化的多晶;在混层中有CrN、Cr_2N以及更复杂的N、C等化合物形成。电化学性质的显著变化与这些元素的化合物以高度弥散的形式构成多晶结构的微合金密切相关。 The Cr element is mixed with Cr4Mo4V steel with N ~ + ion beam to form a new surface alloy layer. The ability of resistance to localized corrosion (pitting) was investigated by FeCl 3 immersion test and polarization test in 0.1 mol / L NaCl acetate-sodium acetate buffer solution pH5.9. The anti-uniform corrosion resistance was also investigated in H 2 SO 4 solution . X-ray diffraction, TEM and XPS microscopic analysis of the mixed layer revealed that the surface alloy mixed well with the matrix to form highly refined polycrystalline grains; CrN, Cr 2 N and more complex N, C Such compounds formed. Significant changes in electrochemical properties are closely related to the microalloying of the compounds of these elements to form polycrystalline structures in a highly dispersed form.