Effect Of Interface Properties On The Rolling Of Special Steel Plate

With the continuous progress of science and technology and economic strength of our country, the military, Bridges, Marine and other aspects of infrastructure projects is increased. At present, the production of special steel plate is mainly used in die casting method. Energy consumption, low efficiency, heavily polluted, and it is not in line with China’s energy-saving emission reduction of environmental protection idea. But using vacuum rolling composite method special heavy plate production, it is high efficiency, timber high rate, low energy consumption, environmental friendly and very suitable for the current special plate production. In the rolling process of extra thick composite slab, the condition of the composite interface has a direct influence on the composite condition of the slab. But now the characteristics of composite interface on the effect of compound mechanism is not yet clear. In this paper, the effect of different interface characteristics on the composite effect is analyzed, which provides a theoretical basis for the practical production.Firstly, considering the effect of shear stress of composite interface on the composite effect,the thick composite slab rolling force model is established. The mechanical properties of the composite rolling force and interface were calculated, and the corresponding composite effect determination criterion is proposed.Next, Through the ANSYS/LS-DYNA finite element software, simulate the rolling process of extra thick composite plate. The effects of different compression rate, interface roughness, rolling speed and rolling temperature on the composite effect of the composite plate were analyzed.Then, the simulation experiment was carried out by using the actual rolling and Gleeble-3800 experiment machine. The composite conditions of special thick composite slabs under different compression rate, interface roughness, rolling temperature and vacuum degree were analyzed. The compound influence law of each factor was determined.Finally, combined with the finite element simulation and laboratory experiments, the composite interface conditions for producing the composite slab with special thickness are determined. And put forward the relevant optimal and most economic actual production process conditions.