退火温度对高轧制延展率Al/IF钢多层复合材料力学性能的影响

采用叠轧焊接方法制备Al/IF钢多层复合材料,随后进行300~450 ℃退火处理,并对叠轧态和退火态的微观结构及力学性能进行分析。结果表明:叠轧态Al/IF钢多层复合材料的抗拉强度介于纯Al和IF钢之间,断裂总延伸率相对较低,退火后Al和IF钢层的硬变均高于其原材料;随着退火温度的增加,抗拉强度逐渐降低,断裂总延伸率呈先增加后减小的趋势,在350 ℃退火时,复合材料的综合力学性能最优。退火温度对Al/IF钢多层复合材料力学性能的影响主要体现在对Al层的影响上。

Effect of annealing temperature on mechanical properties of Al/IF steel multilayer composites with high rolling ductility

Al/IF steel multilayer composites were prepared by roll-bonding, and then annealed at 300-450 ℃. The microstructure and mechanical properties of the as-rolled and as-annealed Al/IF steel multilayer composites were analyzed. The results show that the tensile strength of the roll-bonded Al/IF steel multilayer composites is between that of pure Al and IF steel, and the total extension at fracture is relatively low, while the hardness of botn Al layer and IF steel layer after annealing are higher than that of raw mateial. As the annealing temperature increases, the tensile strength gradually decreases, and the total extension at fracture increases first and then decreases. When annealed at 350 ℃, the comprehensive mechanical properties of the composites are the best. The effect of annealing temperature on the mechanical properties of the Al/IF steel multilayer composites is mainly reflected in the effect on the Al layer.