中文摘要：

文章报道了用千瓦级Nd：YAG脉冲激光器对灰铸铁HT200进行表面重熔的实验．对激光参数与重熔层熔池形貌、表面粗糙度、显微硬度及结构的关系进行了分析，并提出迅速有效地获得最佳激光加工工艺参数的方法．

英文摘要：

The experiment of surface remelting for gray cast iron with a pulsed lkw Nd.YAG laser was crried out. The relationship between the parameter for the laser remelting and the facial look for remelting pool, the surface rough degree, the micro hardness and microstructure was discussed, and the effective method for obtain the optimum technological parameters for the laser remelting was introduced.