How To Roll Large-sized Tungsten Plates?

Pure tungsten plates are generally prepared through powder metallurgy methods, and different thicknesses, sizes and properties of tungsten plate billets are produced using the heating rolling method. The future development direction of tungsten plates is large size, high quality and low cost. By preparing large single weight and large size tungsten plate billets, performing hot rolling deformation and combining with heat treatment processes, better quality and performance can be achieved. Currently, the single weight of tungsten plate billets is generally less than 100 kg, and the thickness is mostly less than 50 mm. The research on hot rolling of tungsten plate billets with larger weight and thickness is not sufficient. This paper uses the DEFORM software to conduct hot rolling simulation of large-sized tungsten plate billets, providing basic theoretical guidance for the optimization of large-sized tungsten plate billet hot rolling technology and the improvement of comprehensive performance.

In actual production, a tungsten plate with dimensions of 64 mm × 660 mm × 530 mm and a single weight of 414 kg was prepared through sintering. The relative density of the sintering reached 96%, and the average grain size was ≤ 40 μm. Guided by the data and rolling method in Table 2 for hot rolling simulation, cross rolling was carried out with every pass reversing direction. After 5 passes, the average pass deformation was 26%, and a tungsten plate billet with an effective size of 14.1 mm × 1190 mm × 1235 mm was successfully rolled. The total deformation rate was 78%, and the macroscopic morphology is shown in Figure 7. This provides good technical preparation for the subsequent rolling of large-sized tungsten plate billets with a weight greater than 800 kg and a thickness greater than 80 mm.