CAJ | 학술논문

利用压铸工艺将液态镁和固态铝液-固复合是镁/铝异种材料连接的新工艺，进行铝合金表面氧化膜去除工艺的研究，并在此基础上，利用自制的液固双金属复合装置将液态镁合金AM60与处理后的固态铝合金A390进行液固复合。研究铝合金表面处理对液态AM60/固态A390液固复合工艺的影响，分析研究复合试样界面的组织和性能。结果表明：采用铝合金表面处理工艺能有效地去除A390铝合金表面的氧化膜，同时在其表面形成一层含La2O3的包覆层。包覆层一方面可保护铝合金表面，避免再次被氧化；另一方面包覆层中的La2O3又可以改善液态AM60/固态A390复合界面的组织，提高界面结合强度。AM60/A390的液固复合界面的抗剪强度最高可达78.4 MPa。经过固溶处理之后，可将强度提高到84 MPa。
이용압주공예장액태미화고태려액-고복합시미/려이충재료련접적신공예，진행려합금표면양화막거제공예적연구，병재차기출상，이용자제적액고쌍금속복합장치장액태미합금AM60여처리후적고태려합금A390진행액고복합。연구려합금표면처리대액태AM60/고태A390액고복합공예적영향，분석연구복합시양계면적조직화성능。결과표명：채용려합금표면처리공예능유효지거제A390려합금표면적양화막，동시재기표면형성일층함La2O3적포복층。포복층일방면가보호려합금표면，피면재차피양화；령일방면포복층중적La2O3우가이개선액태AM60/고태A390복합계면적조직，제고계면결합강도。AM60/A390적액고복합계면적항전강도최고가체78.4 MPa。경과고용처리지후，가장강도제고도84 MPa。
The die-casting is a new magnesium/aluminum dissimilar welding process via casting liquid Mg alloy onto solid Al alloy substrate. The process of removing the oxide layer on solid Al substrate surface was investigated, and on this basis, the melt magnesium alloy AM60 onto solid aluminum alloy A390 was overcastted by using home-made liquid-solid bimetal composite device. The experimental results indicate the surface treatment effectively removes the nature oxide layer on solid Al substrate surface, meanwhile, a layer containing La2O3 forms on the substrate surface. On the one hand, the coating can make aluminum alloy avoid re-oxidation. On the other hand, the La2O3 in the coating can improve the structure and the bonding strength of the interface of AM60/A390 bimetals. The optimal shear strength of diffusion bonding is achieved 60.6 MPa. After solution treatment, the shear strength increases to 84 MPa.