Abstract：It is difficult to evaluate the quality of bearing steels with long fatigue life through conventional technology analyzing the purity and the homogenization of bearing steels. And a more scientific and intuitive method was proposed to evaluate the quality of bearing steels. The multidimensional and quantitative distribution of inclusions can be characterized by a scanning electron microscope. The type and size of inclusions can be analyzed in detail and accurately. In addition, the segregation of each element and density distribution of materials can be accurately analyzed through the quantitative analysis of homogenization by in-situ analysis. The application of those technologies can provide a technological basis for the quality evaluation of bearing steels with ultra-long fatigue life. The rotational bending fatigue property of bearing steels produced by Xingcheng Special Steel was larger than 1 000 MPa. And the rolling contact fatigue property was more than 2×107times.
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2020, Vol. 30 
