Based on the twin roll cast-rolling composite technology,the solid-liquid-solid twin roll casting(SLS-TRC)process of the 4343/3003/4343 aluminum alloy brazing plate was proposed,and the manufacturing of 3.65 mm thick cast-rolled composite sheet under laboratory conditions was realized.Then,the cast-rolled composite sheet was cold rolled to the target thickness of 0.5 mm.The microstructure of the cast-rolled composite sheet was studied by SEM and EDS,and the clad ratio and tensile properties of the rolled composite strip were tested.The results show that the interface of the cast-rolled composite aluminum plate is flat with no gap and impurity defects,and there is 1.4 μm thick diffusion layer between the core and the cladding layer,the combination between the two layers is metallurgical combination.The clad ratio of the rolled composite sheet is 9.97％,the deviation is±0.15％,the tensile strength is 234.8 MPa and the elongation is 3.74％,which meets the national standard requirements.The application of the SLS-TRC process can realize the bonding combination between the core and the cladding layer quickly,meanwhile the casting rolling outlet thickness is small,the pass number for rolling to the finished product is small,and it has the advantages of high production efficiency,low energy consumption and low cost.
关键词
固-液-固双辊铸轧/铝合金钎焊板/冶金结合/包覆率
Key words
solid-liquid-solid twin roll casting/aluminum alloy brazing sheet/metallurgical bonding/clad ratio
维普
万方数据