1992 Volume 78 Issue 3 Pages 463-468
An analytical method has been developed in order to determine ultra-low content of carbon in steel. In the method the specimen is heated up with relatively slow speed in electro-resistance furnace and the infrared spectrum detector has been linked with data analyzer, so that the combustion behavior of carbon has been able to be detected and analyzed in real time.
By the method CO2 originated from carbon adsorbed on the surface of a specimen can be separated from CO2 taken rise from carbon in the specimen.
Thus less than 10 ppm of carbon in steel can be analyzed rapidly with high precision.