摘要
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 quality of laser beam define its applications in laser processing. For different requests of laser processing, the input laser beam always needs to be transformed. Beam optimum method of laser scanning ring facula is put forward for the application of CO2 LASER on heat treatment in the laboratory. The mathematic model of laser scanning ring facula is built basing on the superposing principle of temperature field. And its temperature distribution characteristic is obtained by simulating its temperature field. Then its heat effect on material is studied by doing experiment. Heat effect on metal of focused facula and laser straining ring facula is analyzed. It is shown that distribution of the hardened case for laser heat treatment is im- proved. In terms of the theoretical simulation and experiment research, it is proved that scanning ring facula can realize laser beam optimum for heat treatment, and it has a wide application prospect.
出处
《光学技术》
CAS
CSCD
北大核心
2009年第6期828-831,共4页
Optical Technique
基金
天津市自然科学基金资助项目(08JCYBJC09200)
关键词
激光技术
激光热处理
扫描环形光斑
光束优化
数学模型
温度场模拟
laser technique
laser heat treatment
scanning ring facula
mathematic modle
beam optimum
temperature field simulation
