The bonding of steel plate to aluminum liquid was conducted using rapid solidification. The influence of diffusion time on interfacial structure was studied. The results showed that under the condition of 750癈 for th...The bonding of steel plate to aluminum liquid was conducted using rapid solidification. The influence of diffusion time on interfacial structure was studied. The results showed that under the condition of 750癈 for the temperature of aluminum liquid and 200癈 for the preheat temperature of steel plate, when diffusion time was shorter than 4.3 s, there was only Fe-AI solid solution at the interface. When diffusion time was longer than 4.3 s, Fe-AI compound began to form at the interface. The relationships between diffusion time t and thickness of Fe-AI compound layer H are H=-9.72+2.62t-0.08t2 (4.3 s<t<15 s) and H=2.79+0.647t-0.033t2 (t>15 s).展开更多
The nonequilibrium diffusion of liquid aluminum atoms in cross direction in the innerpart of the solid steel base has been realized by using methods such as roughening steel plate surface, immersing flux on steel plat...The nonequilibrium diffusion of liquid aluminum atoms in cross direction in the innerpart of the solid steel base has been realized by using methods such as roughening steel plate surface, immersing flux on steel plate surface and short time diffusion, and the interface of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction was formed by using rapid solidification. The interfacial structure was studied by means of electron probe microanalysis. The results showed that the interfacial structure of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction is quite different from that of solid steel and liquid aluminum under conventional diffusion, that is, the interface of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction is made up of groups of Al 13 Fe 4 teeth (which grew from the contact surface to steel base inner) at the bulges of steel plate surface and Fe Al solid solution (whose Al content is less than 3.5%) at the concaves of steel plate surface between the groups of Al 13 Fe 4 teeth.展开更多
The bonding of solid steel to liquid aluminum was conducted using rapidsolidification. The influence of diffusion time on interfacial shear strength was studied. Theresults show that when the temperature of aluminum l...The bonding of solid steel to liquid aluminum was conducted using rapidsolidification. The influence of diffusion time on interfacial shear strength was studied. Theresults show that when the temperature of aluminum liquid is 700℃ and the preheat temperature ofsteel plate is 250℃, the relationship between diffusion time (t) and interfacial shear strength(σ) is σ =15.1+8.14t-037t^2 +0.005t^3, and the maximum interfacial shear strength is 71.1 MPa.展开更多
基金This project is supported by the Advanced Technical Committee of China, No.715-009-060.
文摘The bonding of steel plate to aluminum liquid was conducted using rapid solidification. The influence of diffusion time on interfacial structure was studied. The results showed that under the condition of 750癈 for the temperature of aluminum liquid and 200癈 for the preheat temperature of steel plate, when diffusion time was shorter than 4.3 s, there was only Fe-AI solid solution at the interface. When diffusion time was longer than 4.3 s, Fe-AI compound began to form at the interface. The relationships between diffusion time t and thickness of Fe-AI compound layer H are H=-9.72+2.62t-0.08t2 (4.3 s<t<15 s) and H=2.79+0.647t-0.033t2 (t>15 s).
文摘The nonequilibrium diffusion of liquid aluminum atoms in cross direction in the innerpart of the solid steel base has been realized by using methods such as roughening steel plate surface, immersing flux on steel plate surface and short time diffusion, and the interface of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction was formed by using rapid solidification. The interfacial structure was studied by means of electron probe microanalysis. The results showed that the interfacial structure of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction is quite different from that of solid steel and liquid aluminum under conventional diffusion, that is, the interface of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction is made up of groups of Al 13 Fe 4 teeth (which grew from the contact surface to steel base inner) at the bulges of steel plate surface and Fe Al solid solution (whose Al content is less than 3.5%) at the concaves of steel plate surface between the groups of Al 13 Fe 4 teeth.
基金This project is supported by China and Tsinghua-Zhongda Postdoctoral Science Foundation.]
文摘The bonding of solid steel to liquid aluminum was conducted using rapidsolidification. The influence of diffusion time on interfacial shear strength was studied. Theresults show that when the temperature of aluminum liquid is 700℃ and the preheat temperature ofsteel plate is 250℃, the relationship between diffusion time (t) and interfacial shear strength(σ) is σ =15.1+8.14t-037t^2 +0.005t^3, and the maximum interfacial shear strength is 71.1 MPa.
