采用经过二元光学变换后呈二维点阵分布的脉冲激光束对球铁试样作了表面强化处理。对强化前后试样表面的粗糙度、强化层深度、强化层显微硬度分布和耐磨性进行了研究。结果表明,在保证试样表面粗糙度(表面微熔或不熔)的前提下,随脉宽增加强化区层深增加。耐磨性测试表明,脉冲激光强化处理可提高材料耐磨性1.8倍以上。

Pulse laser with two-dimensional lattice distribution by optical transformation, was used to modify surface processing for ductile iron. The surface roughness of modified sample and original sample, modified layer depth, micro-hardness distribution and abrasion resistance were measured. On the condition of ensuring surface roughness (not melting or little melting) . the modified layer depth increased with pulse time. The wear resistance experiments showed that the wear resistance of ductile iron modified by pulse laser was increased by 1. 8 times.