Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Technical Report
Measurement of Carbon Content in Steel by LIBS Which Transmits a Laser Beam in Optical Fiber
Ryoichi OhtaniMakoto IshibashiEiji SekiYutaka Tanaka
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2009 Volume 95 Issue 9 Pages 660-664

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Abstract

Utilizing new laser transmission technology, we have developed a laser induced breakdown spectrometer (LIBS) that allows to obtain uniform energy profile by transmitting high-energy laser emitted from GP-YAG through optical fiber, implemented measurement of carbon content in steel and demonstrated its capability of accurate and fast measurement. The spectrometer made it possible to measure both carbon content distribution in the depth direction and average carbon content in steel at the same time by setting the diameter of the laser light with energy of 90 mJ to 0.9 mm on samples after transmitting it by the optical fiber. In addition, we were able to find carbon content in steel in a coefficient of correlation over 0.99 by using 50 shots average data after 3.6 μm from surface.

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© 2009 The Iron and Steel Institute of Japan
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