In a significant advancement for the steel manufacturing industry, researchers have unveiled a groundbreaking method aimed at enhancing the quality of large steel ingots. The study, led by Wu Gang and his team from the College of Materials and Metallurgy at the University of Science and Technology Liaoning and the Shandong Metallurgical Design Institute, focuses on a 14-ton flat ingot, a critical component in various construction applications.
The innovative approach, termed mold removal controlled cooling, addresses a persistent issue in the solidification process of steel ingots—the detrimental effects of air gaps. By applying cooling specifically to the lower section of the ingot, the team has successfully promoted a bottom-to-top solidification sequence. This method not only improves the solidification quality but also significantly reduces the risks associated with central porosity and hot cracks, which can compromise the integrity of steel products.
Wu Gang remarked on the implications of their findings, stating, “Our method effectively alters the solidification front from a U-shape to a V-shape, which enhances the feeding channel between the riser and the solidification front. This leads to a more uniform distribution of material, ultimately boosting the quality of the ingot.” The research highlights that with increased cooling intensity, the central loose area of the ingot decreased by 2.03%, while the central loose length saw a dramatic reduction of 68.53%, concentrating primarily in the riser area.
The commercial impacts of this research are profound, particularly for the construction sector, which relies heavily on high-quality steel for structural integrity. As the demand for durable materials continues to rise, the ability to produce steel ingots with fewer defects will not only enhance product reliability but also reduce waste and costs associated with rework and material failure.
Moreover, the study introduces a predictive model for assessing cracking risk, which becomes increasingly relevant as cooling intensity escalates. This predictive capability is vital for manufacturers aiming to optimize their processes while maintaining high standards of safety and quality. “Understanding the thermal stress dynamics within the ingot allows us to mitigate risks before they manifest, paving the way for more resilient steel products,” added Wu Gang.
As the construction industry evolves, the integration of advanced cooling techniques like those explored in this research could redefine manufacturing practices, setting new benchmarks for quality and efficiency. The findings were published in ‘Teshugang,’ which translates to ‘Steel and Metal,’ underscoring the publication’s focus on innovations in metallurgical engineering.
For further details on this research and its implications, you can explore the work of the lead authors at the University of Science and Technology Liaoning.
