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Deformation and Properties on Steel/Aluminum Metal-laminate Material

Author: LiMinQuan
Tutor: ZhangHui
School: Hunan University
Course: Materials Processing Engineering
Keywords: Steel / aluminum composite panels Rolling compound Diffusion annealing Thickness ratio allocation Binding strength Bonding interface
CLC: TG331
Type: Master's thesis
Year: 2009
Downloads: 167
Quote: 4
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Abstract


The overall performance of the steel / aluminum composite panels have the mechanical properties of steel and aluminum corrosion resistance, high conductivity and high thermal conductivity to be more widely used in various fields of industrial and civil. Rolling complex is great potential for large-scale production of steel / aluminum composite panel preparation and processing methods, but the interface bonding strength by diffusion annealing composite rolling process and rolling process seriously affected. This article with rolling composite method succeeded in producing a steel / aluminum composite material, the use of the bending test, metallographic and scanning electron microscopy to study the preheating temperature, the amount of deformation of hot-rolled steel / aluminum composite panels composite bonding strength, the interface status and thicker than the allocated. The results showed that: when the total amount of reduction, With the preheat temperature increases, the reduction of aluminum element increases, the amount of reduction of the steel component decreases, the increase in the difference between the amount of reduction of the steel and aluminum; when the preheating temperature is below 400 ° C, the bending frequency and increases with increasing preheating temperature, after which they gradually reduce the preheating temperature of 400 ° C when combined with good solid interface bonding strength. When the preheating temperature is constant, increasing total reduction, steel and aluminum element amount of reduction is proportional to the increase in the same trend, but the difference between the amount of reduction of element with a total reduction amount increases plus the reduced deformation resistance to force convergence; rolling reduction increases, the more the number of bending, bonding interface, and bonding strength as possible; when the total reduction of 20% to 30%, bending number of relatively slow, with the increase in the amount of pressure when the total reduction gt; when 30%, the increase of the number of bending reduction and a rapid increase. This paper studies the different diffusion annealing process systems and different aluminum alloy (1050,4045 and 7072 aluminum alloy) bond strength, the interface morphology of hot-rolled steel / aluminum composite panels. The results showed that: a reasonable annealing system is conducive to hot-rolled steel / aluminum composite panels combine to increase the strength, the temperature of 600 ° C annealing for 1 hour, the number of bending up to 11 times, combined with better strength of the interface is higher. 1050 aluminum composite panels during heat treatment is easy to interface the formation of intermetallic compounds and empty, 4045 and 7072 aluminum composite panel interface after diffusion annealing significantly improved bond strength and intermetallic compounds and empty, indicating that the aluminum alloy containing Si or Zn-containing steel / aluminum composite panel interface intermetallic compounds and cavity formation barriers.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling theory
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