Abstract：Due to the influence of surface carbon, high frequency induction-infrared absorption method (conventional method) (GB/T20123-2006) was only applicable to the determination of carbon higher than 0.005% in steel. It could not meet the determination requirements of ultra-low carbon in steel in large-scale production process. The research results showed that the surface carbon on production sample after daily preparation for direct determination was adsorbed carbon. The surface of standard sample contained both adsorbed carbon and combined carbon. The standard sample certified by GB/T 20126-2006 (preheating method) was preheated and then cooled for conventional calibration, which could effectively eliminate the effect of surface carbon on determination of ultra-low carbon in steel by conventional method. Therefore, the conventional method could be also used in the routine determination of ultra-low carbon in steel.
杨琳;王明生;项秀智;张炯. 试样表面碳对红外吸收常规法测定钢中超低碳影响的研究[J]. 冶金分析, 2011, 31(4): 30-34.
YANG Lin;WANG Ming-sheng;XIANG Xiu-zhi;ZHANG Jiong. Influence of surface carbon of sample on the determination of ultra-low carbon in steel by infrared absorption routine method. , 2011, 31(4): 30-34.
