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| Influence of oxide metallurgy and pulsed magnetic field parameters on steel microstructure |
| ZHU Li-guang1, ZHENG Shi-wei2, ZHANG Qing-jun2,3, CAO Sheng-li2,3 |
1. Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China;
2. Hebei High Quality Steel Continuous Casting Engineering Technology Research Center, College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China;
3. Analysis and Testing Center, North China University of Science and Technology, Tangshan 063210, Hebei, China |
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Abstract Pulsed magnetic field treatment and oxide metallurgy technology are two common methods for refining microstructure and improving material properties,the organic combination can further optimize the performance of steel materials. A self-developed high-frequency induction coil heating furnace and a pulsed magnetic field generating device are used to non-contact apply a pulsed magnetic field to the solidification process of titanium-treated mild steel. The metallographic microscope,multifractal software and Vickers hardness tester are used. The effect of different pulsed magnetic field parameters on the solidification structure is investigated. The results show that the pulsed magnetic field induction intensity is 135-190 mT,and the magnetic field action time is 5-10 min,the metallographic structure of the test is the smallest and uniform. The original austenite grains are remarkably refined,the area reduced from 15.79 to 1.25 mm2,and the hardness of the test increased from 118.1 to 165.4HV. The pulsed magnetic field under this parameter has the best refinement of the solidification structure.
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Received: 03 June 2019
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2020, Vol. 55 
