论文部分内容阅读
激光束的形状和能量分布限定了激光的应用范围,为满足不同的激光加工需要,必须对激光束进行变换。针对实验室用CO2激光器在热处理方面的应用,提出了激光扫描环形光斑光束优化法。基于温度场叠加原理建立了扫描环形光斑温度场的数学模型,模拟其温度场,可得到其温度分布特性;通过实验研究,分析了聚焦光斑与扫描环形光斑在激光淬火中对材料的热作用效果。结果表明,扫描环形光斑能改善激光热处理硬化层分布。理论和实验研究表明,激光扫描环形光斑技术可以实现激光热处理光束的优化,有一定的应用前景。
The shape and energy distribution of the laser beam define the application of the laser. To meet different laser processing needs, the laser beam must be transformed. Aiming at the application of CO2 laser in the laboratory for heat treatment, a laser beam scanning beam spot optimization method is proposed. Based on the principle of superposition of temperature field, the mathematical model of the temperature field of scanning annular spot is established and its temperature distribution is simulated. The experimental results show that the thermal effect of the focused spot and scanning annular spot on laser quenching . The results show that scanning the annular spot can improve the laser heat treatment of hardened layer distribution. Theoretical and experimental studies show that laser scanning ring spot technology can optimize the laser beam heat treatment, and has certain application prospects.