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Application Study of Extreme Value Method in Inclusion Evaluation of High Quality Gear Steel |
Xiao-Fei HE |
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Abstract In this paper, high quality Mn-Cr system gear steels is selected as the research object. Through large-area analysis of automatic scanning electron microscope, it’s found that the equivalent size of the largest inclusion in the test steel is 34.17 μm. The Gumbel statistical extremum method is further used to predict the maximum inclusion in the Mn-Cr system gear steel. Under the condition of 99.9% probability, the detection area is about 100 000 square millimeters and the maximum inclusion size in the test steel is predicted to be 62.1μm, which satisfy industrial and routine scientific research detection and analysis.
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Received: 27 February 2020
Published: 16 October 2020
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