See the measurement conditions for each element selected. The test procedure establishes the distribution analysis method of arsenic, nickel, chromium and manganese, and puts the prepared sample into the special sample box for the distribution analysis of the bamboo shoot 30, loads the sample, and establishes the distribution analysis table according to the X Xin Y method, along the sample. The surface cross line takes 13 points and the distribution analysis of each element is performed.
Analytical method Because there is no standard material for steel distribution analysis suitable for the content of the measured element, the author uses the SQX calculation method. The full-scale cross-sectional scanning analysis of the SQX calculation results and the chemical analysis results within a relative error of less than 10%. However, due to the small spot area of ​​the distribution analysis (0.1 to 1 mm in diameter), the carbon detection limit is high, so no carbon is measured.
Analysis results The results of the distribution of arsenic, nickel, chromium and manganese (mass fraction) at various points on the surface of the bolt steel. It is a histogram of the distribution of arsenic, nickel, chromium and manganese. It can be seen from and 5 that the content distribution of arsenic and nickel elements is low in the center and high in the surrounding area. Although chromium has a tendency to be low in the center and high in the periphery, its change trend is much smaller than that of arsenic and nickel. The manganese distribution is fairly uniform. The relationship between element distribution and steel sample performance can be seen from the 5, the distribution of arsenic and nickel in the sample has obvious non-uniformity, the arsenic and nickel content in the edge region is significantly higher than the middle region, although the chromium also has a low center and surrounding The trend is high, but it is relatively unclear, and the distribution of manganese is relatively uniform.
Conclusion X-ray fluorescence spectrometry is used to analyze the element distribution in steel, which has the characteristics of fast, low detection limit and reliable results. It can clearly and accurately reflect the distribution trend of the content of various elements in steel, and has important guiding significance for improving steel smelting process and improving steel performance.
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