A gear with different finished surfaces was dealt with pulsed electron beam. Experiments of gear bending fatigue strength were complished and contrasted before and after they were dealt with pulsed electron beam for ground tooth surfaces. The microhardness,roughness,topography, organization structure and stress on gear surfaces were measured and their effects on gear bending fatigue strength were analysed and discussed. Experimental results demonstrate that bending fatigue strength of gear with grinding after irradiation is improved 6. 1% than that before irradiation in reliability 50%,while that of without grinding is reduced 14% after irradiation than before irradiation in reliability 50%. The bending fatigue properties of gere are influenced greatly by surface processing technology. The ground gear bending fatigue strength of original and electron beam treated are improved 52. 2% and 88. 2% respectively.%对不同工艺齿面下齿轮进行强流脉冲电子束强化处理,实验研究其弯曲疲劳性能,并对齿轮电子束处理前后的齿面硬度、表面粗糙度、齿根表面形貌及组织和表面应力进行对比,分析不同工艺齿面下电子束处理对齿轮弯曲疲劳性能的影响.实验结果证明,在恒幅载荷条件下,未磨削齿轮在经电子束处理后在可靠度50％下弯曲疲劳极限降低了14％,磨削齿轮经电子束处理后弯曲疲劳极限提高了6.1％.齿轮的表面工艺对弯曲疲劳强度影响较大,经过磨削工艺,原始齿轮和电子束处理的齿轮强度分别增加了52.2％和88.2％.
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