Recent research published in ‘Teshugang’, which translates to “Metal Materials,” has unveiled significant findings regarding the influence of nickel on the continuous cooling transition (CCT) and impact energy of a new type of hot work die steel. This study, led by a team from Jiangsu Hongsheng Die Steel Material Technology Co., Ltd. and Northeastern University, highlights how even a small percentage of nickel—0.8%—can dramatically enhance the properties of QDH steel, a material crucial for various construction applications.
Nickel’s role in modifying the CCT curve is particularly noteworthy. The research indicates that the presence of nickel lowers critical phase transition points, effectively expanding the austenite phase region. This shift not only enhances the steel’s hardenability but also reduces the critical cooling rates necessary for achieving desirable microstructures. As a result, the cooling rate for forming pearlite has dropped from 0.03 °C/s to less than 0.02 °C/s, while the rate for martensitic transformation decreased from 0.4 °C/s to 0.2 °C/s. This improvement in hardenability means that manufacturers can produce stronger and more resilient steel components, which are essential in high-stress environments typical in construction.
“The increased toughness and hardenability of nickel-containing QDH steel can lead to longer-lasting tools and components, which is a game-changer for the construction sector,” remarked Guan Hailong, one of the lead authors of the study. “This research not only enhances our understanding of material science but also opens new avenues for developing more effective construction materials.”
Moreover, the study’s findings on impact energy are equally compelling. The research reveals that the impact energy of nickel-containing steel consistently surpasses that of its nickel-free counterpart across various tempering temperatures. This characteristic is particularly vital for applications requiring high durability and resistance to impact, such as in the manufacturing of die tools used in construction machinery.
As the construction industry continues to evolve, integrating advanced materials like nickel-enhanced hot work die steel could lead to significant advancements in tool longevity and performance. With the potential for reduced material costs and improved efficiency, this research could ultimately influence the way construction projects are designed and executed.
The implications of this study extend beyond just the technical specifications of steel; they resonate throughout the construction industry by promising enhanced safety and reliability in construction practices. As professionals in the field look for ways to innovate and improve their processes, the insights from this research provide a valuable resource.
For more information on the research, you can visit the lead author’s affiliation at Jiangsu Hongsheng Die Steel Material Technology Co., Ltd. and the School of Metallurgy at Northeastern University.
