Abstract
Cooling rate at core site (Rc, °C/s) of hot stamping die components affects the life cycle in use. To achieve accurate prediction of Rcs of Cr-Mo-V-W steels in dependence of tungsten content (w%), working temperature Ti and surface temperature Ts, we carried out real-time detection of the temperature of Cr-Mo-V-W steel cylinders cooling in quenching sand. Cr-Mo-V-W die steel with 1.5% of tungsten had the highest heat conductivity in working temperature range from 200°C to 600°C, and it was ascribed to tungsten reducing the interstitial atoms in matrix and improving the heat conductivity. A cooling temperature trend (CTT) model was constructed. Compared with the modified Fourier model, the CTT model can predict the Rc of Cr-Mo-V-W steels more precisely.
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This research has been supported by the Class III Peak Discipline of Shanghai—Materials Science and Engineering (High-Energy Beam Intelligent Processing and Green Manufacturing).
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Zhang, Y., Wu, R., Min, N. et al. Cooling Rate of Hot Stamping Dies by Constructed Cooling Temperature Trend Model. JOM 75, 5198–5207 (2023). https://doi.org/10.1007/s11837-023-05955-8
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DOI: https://doi.org/10.1007/s11837-023-05955-8