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1.实验条件及方法 实验采用JL-6型横向流动CO_2激光器,其输出功率为500～2000W连续可调。激光光束用焦距300mm的砷化镓透镜聚焦,依靠调节焦点与试验样品表面之间的距离来改变光斑的大小。处理的机械部分是通过可控硅控制伺服电机带动丝杆构成的机械装置,调节工件表面激光扫描所需要的动作和速度。 实验样品是以60钢为基体材料,并加工成20×
1. Experimental conditions and methods The experiment uses JL-6 horizontal flow CO_2 laser, the output power of 500 ~ 2000W continuously adjustable. The laser beam is focused by a GaAs lens with a focal length of 300 mm and the spot size is changed by adjusting the distance between the focal point and the surface of the test specimen. The mechanical part processed is a mechanical device composed of a screw controlled by a silicon controlled servo motor to adjust the action and speed required for laser scanning of the workpiece surface. The experimental sample is based on 60 steel as the base material, and processed into 20 ×