CAJ | 학술논문

强流脉冲电子束表面改性过程中熔化层尺寸是改性效果的衡量指标之一。针对改性中不同束流情况引发的温度场和融化层情况进行了仿真研究。通过对温度场变化等结果的分析，发现仅增加辐照次数不能有效增加熔化层尺寸。在总功率、辐照时间等不变的情况下可以对束斑的电流分布进行控制来实现熔化层控制。对束斑直径聚焦的仿真显示束斑尺寸对熔化层熔深熔宽均有较大影响，熔深随着束斑增大有减小趋势，熔宽则在一定束斑直径下有最大值。同时发现优化电子束电流分布是获得特定熔池尺寸的有效方法。
강류맥충전자속표면개성과정중용화층척촌시개성효과적형량지표지일。침대개성중불동속류정황인발적온도장화융화층정황진행료방진연구。통과대온도장변화등결과적분석，발현부증가복조차수불능유효증가용화층척촌。재총공솔、복조시간등불변적정황하가이대속반적전류분포진행공제래실현용화층공제。대속반직경취초적방진현시속반척촌대용화층용심용관균유교대영향，용심수착속반증대유감소추세，용관칙재일정속반직경하유최대치。동시발현우화전자속전류분포시획득특정용지척촌적유효방법。
The dimension of melting zone is one of critical processing parameters in surface modification process using high current pulsed electron beam (HCPEB). We investigated the temperature field and the melting zone by numerical simulation for different electron beam configurations. The dimension of meting zone was not enlarged by increasing the number of pulsed HCPEM. The diameter of the electron beam has a substantial effect on the melting depth and width if the process is limited to the low power and short pulse time. The melting depth decreases with increasing electron beam diameter, and there exists a proper beam size to give the maximum meting width. Optimizing the current distribution of the electron beam is an effective way to achieve required dimensions of the melting zone.