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| Influence of total heat flux on thermal fatigue cracks of casting mold copper |
| ZHANG Hong-jie1,2, SHEN Ming-gang2, WEN Mao-yuan1, CAI Chang-you2 |
1. No.1 Steelmaking and Metallurgical Repair Plant, Ansteel Subsidiary Company, Anshan 114011, Liaoning, China;
2. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China |
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Abstract With the increasing number of high speed continuous casting machine in China, the failure of mold copper has become the main form of thermal fatigue crack. The influence of temperature and total heat flux on the thermal fatigue crack of copper plate is studied by ANSYS software. The simulation results show that the temperature distribution of the mold copper is different from that of the thermal fatigue crack in production.The main reason for the thermal crack failure in the meniscus of coppers is that the concentrated area of heat flux moving up and down at certain temperature, namely the "energy flow", tears the copper plate. Therefore, reducing the total heat flux at the meniscus of the mold copper may reduce the generation of thermal fatigue cracks.The design of mold with uniform heat transfer and reducing the cracks of mold copper and continuous casting slab is the direction of future technology development. The calculation results show that groove mold is carved on the surface of copper plate, the total heat flux in the meniscus area can be reduced and the uneven heat transfer of the mold copper can be improved.
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Received: 24 April 2020
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2020, Vol. 39 
