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采用热浸镀铝合金工艺在不锈钢上制备铝基隔离防护界面,再将含热浸镀铝合金层的不锈钢骨架与AZ91镁合金镶嵌铸造成形,并研究钢/铝界面和镁/铝/钢界面形貌、界面反应生长机理和界面元素扩散行为。结果表明,不锈钢骨架与热浸镀铝合金形成紧密冶金结合界面,界面生长由Al、Fe元素在化合物层上相互扩散反应控制;AZ91镁合金与浸镀铝不锈钢骨架形成良好的冶金结合,并形成了由Al、Mg金属在界面处熔化与扩散反应控制的复杂界面结构;镁合金与不锈钢之间未发生元素相互扩散,实现了镁合金与不锈钢之间的物理隔离效果。
The aluminum-based isolation and protection interface was prepared on stainless steel by hot-dipped aluminum alloy process. The stainless steel skeleton containing hot-dipped aluminum alloy layer was inlaid with AZ91 magnesium alloy and then the steel / aluminum interface and the magnesium / aluminum / steel interface Morphology, interface reaction growth mechanism and interface element diffusion behavior. The results show that the stainless steel skeleton forms a close metallurgical bonding interface with the hot-dipped aluminum alloy and the interfacial growth is controlled by the mutual diffusion reaction of Al and Fe on the compound layer. The AZ91 magnesium alloy forms a good metallurgical bond with the aluminum-plated stainless steel skeleton and forms The complex interfacial structure controlled by melting and diffusion reaction of Al and Mg metal at the interface, no inter-elemental diffusion occurs between magnesium alloy and stainless steel, and physical isolation effect between magnesium alloy and stainless steel is achieved.