Relationship between solid fraction of slurry and property of steel/mushy Al-20Sn semi-solid bonding

摘要

The slurry of Al-20Sn alloy was prepared using electromagnetic-mechanical stirring method. The bonding of steel/mushy Al-20Sn was conducted using casting rolling technique. The bonding parameters were 505℃ for preheat temperature of steel plate and 10 mm/s for rolling speed. The interfacial mechanical property and structure of steel/mushy Al-20Sn bonding plate were studied. The results show that the relationship between solid fraction of Al-20Sn slurry and interfacial shear strength of bonding plate is S = 52. 9 + 0. 998φ_s - 0. 014 4φ_s~2 (where S is interfacial shear strength, φ_s is solid fraction). The largest interfacial shear strength is 70. 2 MPa when solid fraction is 34.6% . The interface of bonding plate is made up of Fe-Al compound and Fe-Al solid solution alternatively.