Hot Deformation Behavior Of 6016 Aluminum Alloy And Numerical Simulation Of Hot Rolling Process

6016 aluminum alloy is one of the Al-Mg-Si system alloy that can be significantly hardened by a proper heat treatment. Due to its good formability, corrosion resistance, weldability, fatigue strength and good static strength, it has broad used as sheet metal parts of aircraft fuel tanks, pipes, cars, ships, transportation equipment, and instruments, lights frame, the system Ling devices, television tower, drilling equipment, missile parts, rivets, wire, etc.. 6016 aluminum alloy is also the material of choice in European and American automobile cover. In this paper, tests were performed to study the microstructure evolution during hot rolling of 6016 aluminum alloy by combining hot deformation simulation and numerical simulation,and the rolling force were also predicted.Hot compression tests of 6016 aluminum alloy after homogenization at 550℃/12h were performed on Gleeble-1500 at deformation temperatures ranged between 350℃~500℃and strain rates ranged between 0.01s-1~10s-1. The results showed that: at low strain rates (≤1s-1) conditions, the flow stress of 6016 aluminum alloy increases with the strain after a peak value has stabilized, shows dynamic recovery; and in high strain rate (≥10s-1 ) conditions, as the strain increases, jagged fluctuations in flow stress after a peak value decreased gradually, shows discontinuous dynamic recrystallization. The structure analysis shows that: the hyperbolic sine can be used to describe the 6016 aluminum alloy high temperature compression deformation behavior. With the hot deformation activation energy of 270.257 kJ / mol. Relative errors between calculated peak stress and measured peak stress are all within±8%.Microstructures of the 6016 aluminum alloy under different conditions of hot deformation was observed by optical microscopy and TEM. Studies show that the 6016 aluminum alloy main softening mechanism in the high temperature deformation is dynamic recovery; the recrystallization grain size increased with the increasing of temperature and decreasing of strain rate.The reasonable boundary conditions on each pass during hot rolling were studied by plastic finite element method according to the data measured in factory during the multi-pass hot rolling of 5182 aluminum alloy,thermal radiation and heat convection coefficient of emissivity using the system default values.The results show that when the rolling speed is greater than the 90% of roll speed, the friction factor on the temperature field can be ignored,. The rolling temperature thermal was mostly affected by the heat conduction coefficient.In the computer-controlled production of hot strip rolling, rolling force is a very important part in setting the rolling process of order.And its impact on the quality of the strip directly. Before the simulation of rolling force, the effect of the friction factor and heat transfer coefficient to the rolling temperature on the hot rolling process were studyed based on the actual plant temperature data,to obtain the appropriate boundary conditions for computer simulation. Using the finite element analysis software DEFORM-3D to simulate the hot rolling process of 5182 aluminum alloy, and establish the mathematical model of rolling force. Compared the rolling force measured and predicted values, it shows that: the model error was less than 10% accuracy can well meet the actual needs of production; 6016 alloy aluminum rolling force model was build based on a 5182 model for a rolling reference parameter setting process.