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以4A60铝合金和08Al低碳钢冷轧复合板为研究对象,通过变形区剥离、扫描实验,研究了复合变形区金属流动规律、压下量和初始厚度对界面结合效果的影响。结果表明,随着压下量的增加,变形区铝-钢厚度比先减小后增大,最后达到稳定,且增加压下量可提高金属间界面结合强度;初始铝层越薄,复合压下量最小值越小,且在压下量相同时,其结合强度越高。初始铝层厚度和压下量通过影响钢表面氧化膜层的破裂程度来影响界面结合。铝-钢界面结合强度与钢层表面氧化膜破裂率φ相关,当φ>21%时,铝-钢金属间发生初始结合。
Taking the cold rolled plate of 4A60 aluminum alloy and 08Al low carbon steel as the research object, the effects of metal flow, reduction and initial thickness on the interfacial bonding effect were studied by stripping and scanning experiments in the deformation zone. The results show that with the increase of the reduction, the thickness ratio of aluminum-steel in the deformed zone decreases firstly and then increases, finally stabilizes, and the increase of the reduction amount can increase the bonding strength of the intermetallic interface. The thinner the initial aluminum layer, The lower the minimum value of the smaller, and the amount of the same reduction, the higher the bond strength. The initial aluminum layer thickness and reduction affect the interfacial bonding by affecting the degree of cracking of the oxide film on the steel surface. The bond strength of the aluminum-steel interface is related to the rupture rate of the oxide film on the surface of the steel layer. Initial initial bonding occurs between the aluminum and steel when φ> 21%.