不同加工工艺材料表面电子束改性粗糙度分析

Analysis on Surface Roughness of Material with Electron Beam on Different Finished Surface

针对工件表面的粗糙度对其使用起着至关重要的影响,对40Cr材料进行电子束正交实验并检测其粗糙度。结果表明:电子束参数对材料表面的粗糙度影响较大,参数不同,材料表面的粗糙度有可能升高或者降低。对原始表面低粗糙度试样进行电子束试验,表面粗糙度值随照射次数增加不断升高;对原始表面高粗糙度试样进行试验,表面粗糙度值随照射次数增加处于下降趋势。分析表明:电子束处理对材料表面形貌具有消除划痕和产生熔坑两方面的影响,电子束处理材料表面粗糙度的变化是以上两个过程综合作用的结果。

Surface roughness of part was vital to its application.40Cr material was irradiated by large scale pulse electron beam with orthogonal experiment and the surface roughness was checked.The results indicate that the surface roughness of 40Cr is changed by different electron beam parameters.Surface roughness of part increases or decreases in terms of electron beam parameter.The samples with high and low surface roughness are tested with electron beam respectively.The results show that the surface roughness decreases with irradiation numbers increasing in high original surface roughness,contrary surface roughness increases with irradiation numbers increasing in low original surface roughness.It is analysed that the surface roughness is influenced in two opposite sidedness when it is modified on the surface with pulsed electron beam.