Recrystallization Modeling And Microstructure Simulation Of Pb-Ca-Sn-Al Alloy Under Tensile Stress

Lead alloys are mainly used for production of the grid of lead-acid battery.Recently, the lead-acid battery of maintenance-free put forward higher requirements ofits corrosion resistance. While, the reaserch of the microstructure of lead alloys has animportant significance to the promotion of its corrosion resistance. At present, leadalloys are produced by continuous rolling. Through annealing after continuous rolling,lead alloys will go through the process of recovery and recrystallization, which willremarkablely change the microstructure. For the yield strength of lead alloys is quitelow and the tension in annealing is comparatively high, the tension field which has agreat influence on the recrystallization process can not be ignored.Therefore, Pb-Ca-Sn-Al alloys have been chosen as the research material. Singlefactor experiment and orthogonal experiment have been designd to discuss the actionforms of induced tension in the recrystallization kinetics model which has to bemodified. Inspection result of the model after modified seems to be more significant andlinear.The recrystallization process has been simulated with the key parameters in themodel that has been established, through the method of Monte Carlo(MC). First,algorithm have been ensured and key hypothesis in the simulation has been made. Andthen programs have been written through Matlab, which is a numerical recipes software.Simulation images have been showed and required data has been counted. The finerecrystallization structure can be observed in the images, which intuitively reflects theevolution process of the recrystallization behaviour under the effect of induced tension.Finally, the microstructure of annealed samples, which is similar to the microstructureof computer simulation, have been observed by EBSD test, which shows the accuracyof the simulation results.At last, a comparison that how the induced tension contributes to therecrystallization process has been done, respectively by computer simulation and thekinetics model established by orthogonal experiment. The results consistently confirmethat the induced tension have passive effect on the recrystallization behaviour of leadalloy. What’s more, the more the induced tension is, the more the recrystallizationprocess is delayed.