Study on Fiber Laser Color-Marking on 304 Stainless Steel Surface to Form Best RGB Parameters

• Main Authors: Shu-Ya Wu, 吳書亞
• Other Authors: Kum-Ming Hsu
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/nffqn4

碩士 === 國立虎尾科技大學 === 機械與電腦輔助工程系碩士班 === 105 === Due to the rapid development of industrial technology, the demands for stainless steel product diversity are increasing. In addition to good mechanical and chemical properties, it also requires excellent or specialized appearance to enhance product value. Stainless steel is easily machined and highly corrosion resistant; it has been commonly used in various industries. The domestic study shows anodization or printing are the primarly methods for coloring which can be easily peeled off. This study will use fiber laser color-marking technique, through laser parameters to color stainless steel. The goal is to produce three primary colors - red, green and blue and use spectroscope to analyze the target wavelengths. The red wavelength is 624.63nm, the green wavelength is 533.31nm and the blue wavelength is 438.18nm.This study applied Taguchi’s Nominal-The-Best and Larger-The- Better to find the best combine parameters and uses spectroscope to analyze red, green and blue L1~ L9 stainless steel oxide layer’s reflective light wavelength for wavelength data and spectrogram to confirm color; the red color uses Taguchi’s Nominal-The-Best and scan-speed predictive value (F) is 139mm/sec and wavelength is 625.97nm, compared to Taguchi’s L1~L9 test, it is closer to the target value 624.63nm. The green color uses Taguchi’s Nominal- The- Best and found laser frequency predictive value (F) is 755.17 kHz, the Spectral analysis shows wavelength is 533.31nm which meets the target value. The blue laser coloring changes the original study of the wavelength position to wave intensity, uses Taguchi’s Larger-The-Better and the Spectral analysis clearly states wavelength has increased to 655μw/nm but there is still a great difference with the target value. Lastly, the Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectrometer (EDS) are used to analyze stainless steel’s color surface and composition.