Abstract：The content of residual elements had become an important index to measure the quality of bearing steel. Therefore, it was necessary to monitor and control the residual elements in bearing steel. The sample preparation conditions were optimized. The determination method of eleven residual elements (including Ca, Ni, Mo, Cu, Nb, V, Ti, As, Sn, Pb and Sb) in bearing steel by spark discharge atomic emission spectrometry (Spark-AES) was established. It was found that the relative standard deviation of determination results was smallest under the following experimental conditions: the sample was prepared with milling machine; the total milling depth of sample was controlled at 1.0mm; the translational velocity of milling head was 150mm/min. The accuracy of instrument was verified with the certified reference material for steel spectral analysis. The systematic deviation was corrected by adjusting the response curves. Six parallel samples of GCr15 bearing steel were prepared and determined according to the experimental method. The relative standard deviations (RSD, n=6) of determination results of the above eleven elements were all less than 5%. The proposed method was applied for the determination of Ca, Ni, Mo, Cu, Nb, V, Ti, As, Sn, Pb and Sb in six certified reference materials of bearing steel, and the results were consistent with the certified values.
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