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采用等辊径、等辊速冷轧复合技术制备了AgNi10/Cu/Fe三层复合材料,对其界面结合机制进行了研究。复合前对三层材料分别进行再结晶退火,获得均匀的原始组织及相近的硬度,并用钢丝刷清理复合面。利用扫描电镜和能谱仪对复合材料的剥离面进行了形貌观察和成分分析。结果发现,AgNi10/Cu/Fe的界面结合机制主要是裂口机制。各层复合面的硬化层在轧制时开裂,其中较软金属(AgNi10和Cu)从裂口中挤出,与硬金属(Cu和Fe)产生结合;其结合强度分别大于AgNi10和Cu的基体强度。
The three-layer AgNi10 / Cu / Fe composites were prepared by the same roll diameter and roll-speed cold rolling technology, and the interface bonding mechanism was studied. The three layers of materials were recrystallized and annealed respectively before the composite to obtain a uniform original structure and a similar hardness, and the composite surface was cleaned with a wire brush. The morphology and composition of the peeled surface of the composite were observed by SEM and EDS. The results show that the interface mechanism of AgNi10 / Cu / Fe is mainly the cleavage mechanism. The hardened layer of the composite surface of each layer is cracked during rolling, and the softer metal (AgNi10 and Cu) is extruded from the crack and combined with the hard metal (Cu and Fe); the bonding strength is greater than that of AgNi10 and Cu respectively .