Rolling of AZ31 Magnesium Alloy Strip Using Induction Heating Rolls

Abstract

Magnesium alloy strips are difficult to produce through cold forming process due to their poor deformation ability. In this article, fabrication of AZ31 alloy strip by Hot-roller warm rolling process was studied. Experiment using induction heating rolls was carried out, its results confirmed that this technique can improve plasticity of AZ31, and reduce its processing difficulty. The temperature change in deformation zone during Hot-roller warm rolling with a roll temperature of 150~350 °C was analyzed by numerical simulation. Finally, a prediction equation of deformation temperature in strips during Hot-roller warm rolling process was established.

Method for Outlet Temperature Control during Warm Rolling of AZ31 Sheets with Heated Rolls

“…8) As shown in Fig. 1(a), the square shape copper pipe was used as induction heater with a power of 40 kW, and it can quickly raise the temperature of roll surface to a constant value, which can be measured by thermal couple on five points with the same distance on the rolls and shown in Fig.…”

“…So the initial sheet temperature can be reduced to lower than 250°C without repetitive reheating and a warm-rolling temperature and improved process ability can be achieved. 8) Several studies had concentrated on warm rolling process of Mg alloy sheet with heated rolls. Cai et al 9) analyzed the…”