Recent advancements in metallurgy have unveiled significant insights into the forging process of nickel-based alloys, particularly the N08120 alloy used in corrosion-resistant applications. A study led by Liu Yu and Xu Wenliang from Baowu Special Metallurgy Co., Ltd., published in the journal ‘Teshugang’ (translated as ‘Special Steel’), has addressed a critical issue that has long plagued the manufacturing of flat ingots: forging cracking.
In their research, the team conducted rigorous experiments and on-site analyses to pinpoint the root causes of cracking in the 20-ton flat ingots. Their findings revealed that internal solidification defects and improper heating processes were the primary culprits. “During the solidification phase, defects such as porosity and shrinkage are likely to develop, particularly in the lower middle section of the ingot,” explained Liu Yu. This structural weakness creates significant tensile stress, which can cause cracks to form and propagate during the forging process.
The implications of this research extend beyond the laboratory. The construction sector, which increasingly relies on high-performance materials like nickel-based alloys for critical applications, stands to benefit significantly from these findings. By implementing the study’s recommendations—such as reducing casting speeds and optimizing heating methods—manufacturers can enhance the integrity of their products, leading to more reliable and durable components in construction projects.
Moreover, the study emphasizes the importance of material handling during the heating phase. The researchers found that a stacked charging mode of cold ingots could exacerbate internal stresses. “By strictly prohibiting the stacking of cold ingots and increasing the proportion of hot-feeding ingots, we can significantly mitigate the risk of cracking,” noted Xu Wenliang. This approach not only improves product quality but also enhances production efficiency, which is crucial for meeting the growing demands of the construction industry.
As the construction sector continues to evolve, the findings from this research could pave the way for new standards in material processing and quality assurance. The ability to produce more resilient alloys will undoubtedly lead to advancements in structural integrity and longevity, offering a competitive edge to manufacturers who adopt these practices.
This groundbreaking work by Liu Yu and Xu Wenliang not only addresses a longstanding manufacturing challenge but also sets a precedent for future research in metallurgy. The potential for improved material performance can have far-reaching effects, ensuring that construction projects are safer and more sustainable. For more information on their work, visit Baowu Special Metallurgy Co., Ltd..
