用热物理法制备ZnO纳米晶须和纳米粒子 ,该晶须从中心向空间三维拓展出四根针 ,针的直径由根部向顶部逐渐变小 ,使ZnO纳米晶须在很宽波段对光吸收。利用此特殊结构制备出纳米黑化吸收剂 ,并应用于激光表面强化。与传统黑化剂的效果相比 ,其 5Cr5MoSiV钢淬硬层的显微硬度达到 792Hv,增幅为 6 % ;淬硬层的最大深度为0 6 0mm ,上升的幅度为 2 0 % ;激光淬火功率下降了 30 0W ,节能高达 30 %。 ZnO nanocrystalline whiskers and nanoparticles were prepared by thermal physics method. The whiskers extended three-dimensionally from the center to the four needles, and the diameter of the needle gradually decreased from the root to the top, which made the ZnO nanowhiskers absorb light in a wide band . Nanometer blackening absorbent is prepared by using the special structure and is applied to laser surface strengthening. Compared with the effect of traditional blackening agent, the hardness of hardened layer of 5Cr5MoSiV steel reaches 792Hv, an increase of 6%; the maximum depth of hardened layer is 600mm, the rising amplitude is 20%; the laser quenching power Reduce 30 0W, energy saving up to 30%.