Relationship between solid fraction of slurry and property of
steel/mushy Al-20Sn semi-solid bonding
steel/mushy Al-20Sn semi-solid bonding
(1. Department of Mechanical Engineering, Northern Jiaotong University,
Beijing 100044, China;
2. Department of Mechanical Engineering, Tsinghua University,
Beijing 100084, China;
3. Metal Forming Department, Northeastern University,
Shenyang 110006, China;
4. Anshan Automobile Fittings Factory, Anshan 114014, China)
Beijing 100044, China;
2. Department of Mechanical Engineering, Tsinghua University,
Beijing 100084, China;
3. Metal Forming Department, Northeastern University,
Shenyang 110006, China;
4. Anshan Automobile Fittings Factory, Anshan 114014, China)
Abstract: 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 10mm/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+0.998φs-0.0144φs2 (where S is interfacial shear strength, φs is solid fraction). The largest interfacial shear strength is 70.2MPa when solid fraction is 34.6%. The interface of bonding plate is made up of Fe-Al compound and Fe-Al solid solution alternatively.
Key words: bonding of steel/mushy Al-20Sn; solid fraction; interfacial shear strength; interfacial structure