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National Key Laboratory of High-end Equipment Interface Science and Technology has made progress in the research of new pulse magnetic treatment technology to improve the rolling contact fatigue life of Hangfa bearing steel
Recently, Cai Zhipeng team of the National Key Laboratory of High-end Equipment Interface Science and Technology optimized the process parameters of pulse magnetic treatment to control bearing steel by using the chemical potential difference at the phase boundary between bearing steel carbide and martensite matrix as an evaluation index, and obtained new process parameters. After rolling contact fatigue comparison test, the new process parameters can simultaneously improve the average life and reduce the dispersion of fatigue life (as shown in Figure 1), compared with the original process (as shown in Figure 2), the average value of the unchanged difference is significantly improved, and the increase amplitude is significant, which has a good application prospect.
Fig. 1 optimized pulsed magnetic treatment process improves life and reduces life dispersion at the same time.
Fig. 2 Pulse magnetic treatment before optimization is mainly used to reduce the dispersion of rolling contact fatigue life of bearing steel.
Reprint | National Key Laboratory of High-end Equipment Interface Technology
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Tianjin High-end Equipment Research Institute, Tsinghua University, Copyright
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