激光淬火过程中的激光束模式分析  

Laser Beam Mode Analysis in Laser Quenching Process

作　　者：姚建华[1,2] 傅纪斌[1,2] 陈君[1,2] 

机构地区：[1]浙江工业大学机械制造及自动化教育部重点实验室,浙江杭州310014 [2]浙江工业大学激光加工技术工程研究中心,浙江杭州310014

出　　处：《应用激光》2008年第1期25-29,共5页Applied Laser

摘　　要：光束质量及功率稳定性在激光热处理中起着至关重要的作用。本文检测了在激光淬火过程中连续CO2激光束能量的空间分布变化情况,分析了激光模式对激光淬火硬化层均匀性的影响。在激光耦合输出端附近的光轴上安置基于焦热电相机的新型在线激光束分析仪实时监测高功率激光束模式。结果表明,由于激光能量密度空间分布的不均匀,导致激光功率密度高的一端所形成的硬化层更深;此外在特定功率下,激光模式、激光能量平均值和标准偏差都比较稳定,因此沿激光扫描方向的硬化带层深较为均匀。The quality of laser beam and its stability play fundamental roles in laser material processing. In this paper, experiments were carried out to examine the variations of the continuous wave CO2 laser beam profile during the laser quenching process, and to analyze the effect of laser mode on the uniformity of quenching hardened layers. A pyroeleetric camera-based new industrial inline laser beam analyzer was installed inthe optical line near the laser output coupler to monitor high power laser beam profiles in real-time. It was indicated that because of the ununiformity of the laser power intensity in spatial distribution, one end where high laser power intensity located on resulted in deeper hardened layer. In addition, it was found that at a certain laser power, laser beam mode, average laser energy, and the standard deviations all remained stable during the laser quenching process, and the hardened layer along the laser scanning direction was uniform.

关 键 词：激光模式 激光淬火 在线激光束分析 实时监测 

分 类 号：TN248.22[电子电信—物理电子学] TG156.99[金属学及工艺—热处理]