Abstract
The solidification process of castings is prone to shrinkage porosity and macroscopic segregation defects. Utilizing a reduction technique to control the defects in the solidification process of castings is an effective method. In order to investigate the influence mechanism of reduction technology on the reduction-induced deformation at different positions during the solidification process of castings and the impact on the density of solidification structure, laboratory experiments on the reduction-induced deformation of steel ingots during solidification were conducted. Corresponding finite element numerical simulations were performed, and micro-CT detection was employed to analyze the pore distribution of the ingots. It was found that reduction-induced deformation during the solidification can effectively enhance the density of steel ingots. This study also innovatively introduces the concept of relative deformation displacement and reduction-induced deformation transfer coefficient, providing a measure of the actual compression deformation at different positions in the steel ingot during the reduction-induced deformation process. When the fraction solid is less than 0.70, the reduction-induced deformation transfer coefficient is ranging between 1.1 and 1.2. However, when the fraction solid is greater than 0.75, the reduction-induced deformation transfer coefficient rapidly decreases with an increase in the fraction solid until it reaches zero.
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This work was supported by the National Natural Science Foundation of China under Grant Nos. 52104317 and 51874001.
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Zhang, C., Nian, Y., Zhang, L. et al. Deformation Transmission Mechanism in Reduction Process During Steel Casting and Its Impact on Density. Metall Mater Trans B 55, 1351–1366 (2024). https://doi.org/10.1007/s11663-024-03032-2
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DOI: https://doi.org/10.1007/s11663-024-03032-2