Micron Aluminum And Copper Foils The Study Of Performance And Microstructure

Multi-high cold rolling technology is availability measure to obtain as thin as a wafer of metal strip, metal strip as thin as cicada wing could be obtained by rolling. With the technology developed, the use of metal strip is wider and wider. The thin strip plays a great operation in technology fields, such as space flight, electronics, modern weapon experimentation and so on. It is complex, refined and very difficulty technology to make metal thin strip, and its thickness only is a few microns.In this paper, aluminum and copper foils are made using multi-high rolling mill. The least thickness is less than 1.8 micron and 1.5 micron. The surface of quality of these foils is very good. The average roughness R_a and square roughness R_q are less than 50nm, and the consistency of thickness is more than 90%, within the range of 200 micron.Then, the mechanics performance test shows that σ_b increase with the rolling pass, the change of rigidity increases firstly and then decreases. There is a curve of rigidification and intenerate in the process of rolling. And the result of XRD measurement shows that the microstructure has been changed with the rolling pass, such as the grain become obviously thin, and crystal side deflects, and crystal lattice become abnormal.When the foils with same thickness were annealed, the results of test show thatthe mechanics performance of foils was changed with the anneal temperature. Andσ_b was decrease as the temperature increasing, and the rigidity appearintenerate-rigidification-intenerate circle mechanism. It is because of variety of themicrostructure in the process of annealing. The microstructure determined the...