Study On Homogenization Of Al0.8Mn0.5Fe Stock Alloy Strips By Continuous Cast-rolling

Good deep-drawing property and no cracks on the surface is required for non-viscous pan materials. The homogenization annealing on A10.8Mn0.5Fe stock Alloy strips by continuous cast-rolling for new non-viscous pan materials were systematically studied in this article. Combining with mechanical property testing and microstructure analysis which with different homogenization temperature, effect of homogeneously annealing temperature and time on microstructure, heating-up speed on critical deformation value were studied. Main conclusion as follows:(1) Two aspects changes in microstructure of alloy in the course of homogenization annealing: On the one hand, equilibrium phase precipitated firstly from non-equilibrium supersaturated solid solution when homogenization temperature is below 500℃. The equilibrium phases resolve into the solution matrixes when homogenized above 580℃. On the other hand, the large intermetallic compound which formed when cast ingot solidificated dissolved and spheroidized. Dendrite microstructure disappeared when temperature is between 540℃-580℃, and the grains were coarsened remarkably when homogenization temperature above 580℃.(2) The fine second phase were dispersed and the grains were elliptical equiaxed grains after homogenization treatment at 540℃. So the appropriated homogenization treatment processing should be at 540℃for 4h.(3) Both of the tensile strength and elongation of final product almost appeared lower-most point when homogenization temperature at 540℃580℃. The varying rule like V pattern, and didn't like conventional scissors curve. So varying rule was different from conventional curve.(4) Tensile strength of final product appeared lower-most point and elongation appeared peak when treatment temperature at 460℃which the homogenization temperature at 540℃and 580℃. And it meet requirement of deep-drawing material as the non-viscous pan. So final product may obtained the best tensile strength and elongation when annealed at 460℃or 580℃.(5) The product occurred recrystallization and the mechanical property appeared lower Tensile strength and high elongation. The structure was fibrous grain along roll direction when homogenization at 540℃for 4h. And it occurred recrystallization when for 8h. So, the homogenization time litter, critical deformation of the product larger, when homogenization at same temperature(540℃) and same annealing technology.