Yan X.-H.,Tianjin Steel and Iron Group Co. |
Bian L.-H.,Tianjin Steel and Iron Group Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2012
Carbon-manganese alloy ball can not be directly analyzed by routine method for it contains a large amount of carbon. A large amount of sample was ignited, and the percentage of residue after ignition to the original sample was calculated. A portion of sample after-ignition was accurately weighed, and then manganese and phosphorus content was determined by ammonium ferrous sulphate titration method and phosphomolyb-date blue spectrophotometric method, respectively. Finally, the manganese and phosphorus content in original sample was calculated according to the percentage of sample after-ignition. The measurement error due to the inhomogeneity of original sample was proved to be decreased by the established method and thus the accuracy and precision have been greatly improved.