TiN/Ni alloying of 38CrMoAl steel surface was carried out by continuous scanning electron beam. The effect of electron beam process parameters on the surface microstructures and mechanical properties of 38CrMoAl steel was studied. The results shows that the sample surface was divided into three regions: alloying layer, heat affected zone and substrate. Alloying layer made up with equiaxed crystals and short columnar crystals, microstructure of the heat affected zone was acicular and lath martensite, microstructure of substrate was tempered sorbate. The microhardness of the sample section first increased and then decreased, at a depth of 400 μm, the microhardness reached a maximum of 817.9 HV. When the beam current reached 12 mA and the moving speed reached 5.5 mm/s, the surface microhardness of the sample reached the highest 1209HV and the abrasion loss reached the lowest 4.6 mg.

采用连续扫描电子束对38CrMoAl钢表面进行TiN/Ni合金化。研究了电子束工艺参数对38CrMoAl钢表面显微组织和力学性能的影响。结果表明，样品表面分为合金层、热影响区和基体三个区域。合金层由等轴晶和短柱晶组成，热影响区显微组织为针状和板条马氏体，基体显微组织为回火山梨酸盐。试样断面显微硬度先升高后降低，在400 μm深度处，显微硬度最高达到817.9 HV。当束流达到 12 mA，移动速度达到 5.5 mm/s 时，