YAG激光束与金属粉末流相互作用检测研究  

Detection Research on Interaction of YAG Laser Beam and Metal Powder Stream

作　　者：全衡 王云山[1] 董玲[1] 方艳[1] 胡鹏[1] 

机构地区：[1]天津工业大学激光技术研究所,天津300160

出　　处：《应用激光》2014年第1期67-71,共5页Applied Laser

基　　金：国家自然科学基金委员会与中国民用航空局联合资助项目(项目编号:U1333121);天津市科技支撑重点项目(项目编号:11ZCKFGX02500)

摘　　要：为研究同轴送粉熔覆中YAG激光束与粉末流的相互作用机理,采用CCD检测技术,对不同功率、不同送粉量下粉末流分布进行检测,得到不同参数下粉末流的图像、灰度分布图和伪彩色分布图。结果表明:随着激光功率增加,粉末流图像由暗变亮,最后到白炽状态,其温度逐渐升高。激光功率400W时,随着送粉量的增加,粉末流图像由暗变亮,到一定程度后变暗。该检测结果可用于激光熔覆工艺优化,提高熔覆的质量以及材料的利用率。In this paper, the mechanism of interaction between the YAG laser beam and powder stream in coaxial laser cladding was studied by CCD detection technology, temperature distributions of powder stream with different laser power and powder mass flow rate were detected. Experiment images, pseudo-color pictures and gray-scale pictures of powder stream were ob- tained with different process parameters. Experimental results show that the brightness of images varies from weak to strong , and the temperature of powder stream increases as well when the laser power increases, and finally the images become incandes- cence. With the increase of powder mass flow rate, when the laser power is 400W, the brightness of images varies from weak to strong and begin to be weak as the powder mass flow rate reaches to a certain quantity. The detection results can be used to optimize laser cladding parameters and improve the quality of laser cladding.

关 键 词：激光技术 激光熔覆 粉末流 温度分布 CCD检测 

分 类 号：TN249[电子电信—物理电子学]