Interfacial mechanical property of steel-mushy Al-20Sn bonding  

作　　者：PengZhang YunhuiDu HanwuLiu DabenZeng JianzhongCui LiminBat 

机构地区：[1]DepartmentofMechanicalEngineering,BeijingJiaotongUniversity,Beijing100044,China [2]DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,China [3]MetalFormingDepartment,NortheasternUniversity,Shenyang110006,China [4]AnshanAutomobileFittingsFactory,Anshan114014,China

出　　处：《Journal of University of Science and Technology Beijing》2004年第2期165-168,共4页北京科技大学学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (No.50274047);Beijing Jiaotong University Foundation

摘　　要：The bonding of a steel plate to Al-20Sn slurry was conducted using thecasting rolling technique. The surface of the steel plate was defatted, descaled, immersed (inK_2ZrF_6 flux aqueous solution) and stoved. Al-20Sn slurry was prepared using the electromagneticmechanical starring method. The interfacial mechanical property of the bonding plate was researchedto determine the relationship between the diffusion time and the interfacial shear strength. Inorder to identify the mechanism of bonding, the interfacial structure of the bonding plate wasstudied. The results show that at a prebeat temperature of the steel plate of 505 deg C and a solidfraction of Al-20Sn slurry of 35 percent, the relationship between the interfacial shear strength Sand the diffusion time t is S=28.8+4.3t-0.134t^2 +0.0011t^3. When the diffusion time is 22 s, thelargest interfacial shear strength is 70.3 MPa, and the corresponding interface is a new one whichis made up of Fe-Al compound and Fe-Al solid solution alternatively and in a right proportion. Inthis interfacial structure, the interfacial embrittlement does not happen and Fe-Al compound canplay its role in strong combination adequately.The bonding of a steel plate to Al-20Sn slurry was conducted using thecasting rolling technique. The surface of the steel plate was defatted, descaled, immersed (inK_2ZrF_6 flux aqueous solution) and stoved. Al-20Sn slurry was prepared using the electromagneticmechanical starring method. The interfacial mechanical property of the bonding plate was researchedto determine the relationship between the diffusion time and the interfacial shear strength. Inorder to identify the mechanism of bonding, the interfacial structure of the bonding plate wasstudied. The results show that at a prebeat temperature of the steel plate of 505 deg C and a solidfraction of Al-20Sn slurry of 35 percent, the relationship between the interfacial shear strength Sand the diffusion time t is S=28.8+4.3t-0.134t^2 +0.0011t^3. When the diffusion time is 22 s, thelargest interfacial shear strength is 70.3 MPa, and the corresponding interface is a new one whichis made up of Fe-Al compound and Fe-Al solid solution alternatively and in a right proportion. Inthis interfacial structure, the interfacial embrittlement does not happen and Fe-Al compound canplay its role in strong combination adequately.

关 键 词：interfacial shear strength diffusion time interfacial structure 

分 类 号：TG40[金属学及工艺—焊接]