利用强流脉冲电子束对45^#钢进行表面改性

Surface modification of 45# steel by high-current pulsed electron beam

利用强流脉冲电子束对45#钢进行了表面改性处理,并对其显微组织和改性机制进行了分析和讨论。结果表明:材料近表层的显微组织沿电子束注入方向大致可分为4层:熔化层(3～10μm)、热影响层(10～50μm)、应力影响层(50～250μm)、基体组织(大于250μm);显微硬度随轰击次数的增加而增加,最大值出现在50μm左右;多次轰击可以提高耐磨性。

The surface modification of 45~# steel bombarded by high-current pulsed electron beam was studied and microstructure and surface modification were analysed and discussed. Experimental results show that microstructure of near-surface layers can be divided into four zones along the direction of electric beam: the white layer or melted layer (3～10μm), the heat effecting zone (10～50μm), stress effecting zone (50～250μm) and matrix (after 250μm).The microhardness increases with increasing of bombardment times,abrasion resistance property is enhanced by increasing of the bombardment times.