Embedded aluminum-steel composite sheets used in heat exchanger were produced by cold roll bonding (CRB). The influences of annealing temperature and annealing time on the microstructure and the bonding strength of the composite sheet were investigated. The recrystallization of the steel layer began at 525 °C and finished at 600 °C. With the increase of the annealing temperature, the peel strength of the composite sheet whose original steel sheet surface was treated by scratch brush initially increased and then decreased, which was resulted from the competition of the mechanical locking and metallurgical bonding. After annealing, the cracks which formed between the broken work-hardened steel surface layer and its matrix during cold roll bonding remained. The composite sheet produced by CRB with the steel surface treatment of flap disc had less interfacial defects, higher bonding quality, higher diffusion rate of Al and Fe atoms at the interface and larger metallurgical bonding extent than the composite sheet produced by CRB with the steel surface treatment of scratch brush under the same conditions of annealing, which was helpful to shorten annealing time, reduce energy consumption and improve production efficiency.

用于换热器的嵌入式铝钢复合板采用冷轧压合（CRB）工艺生产。研究了退火温度和退火时间对复合板显微组织和结合强度的影响。钢层的再结晶开始于 525 °C，结束于 600 °C。随着退火温度的升高，原钢板表面经刮刷处理的复合板的剥离强度先升高后降低，这是机械锁紧和冶金结合竞争的结果。退火后，冷轧压焊时断裂的加工硬化钢表层与基体之间形成的裂纹依然存在。