Spark spectrometry for inclusions content distribution on the surface of large size metallic materials

A method of spark spectrometry for inclusions content distribution on the surface of large size metallic materials, comprising the following steps:

• analyzing the surface of large-size metallic materials by spark discharge continuous excitation scanning, obtaining a mixture intensity distribution data of a solid solution of element and its inclusions on the surface of the large size metallic materials;
• summarizing the mixture intensity distribution data of the solid solution of element and its inclusions, obtaining a spectral intensity relative frequency distribution diagram of the solid solution of element and its inclusions;
• fitting the spectral intensity relative frequency distribution diagram to obtain a spectral intensity distribution data of the inclusions;
• taking a sample with a pre-set area on the surface of the large size metallic materials as a small sample, and obtaining quantity and a size information of the inclusions in the small sample;
• correlating the size information of the inclusions in the small sample with the spectral intensity distribution data of the inclusions;
• determining a corresponding relationship between the size of the inclusions and the spectral intensity, obtaining a result of content distribution of the inclusions on the surface of the large size metallic materials.