ZHANG Conghui1, XUE Shaobo1,2, XIAO Guizhi1, YAN Xuebai2, SHU Ying2
1 College of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China 2 Northwest Institute For Non-ferrous Metal Research, Xi’an 710016, China
Abstract: With the rapid development of aerospace, electronic communications, military chemical, nuclear industry and submarine cable laying, the demand for high quality rare metal foils is increasing. In the definition of rare metal foils, it is mainly for products with a thickness less than 0.02 mm. Among them, a product with a thickness of less than 0.01 mm is referred as a micron order. Meanwhile, higher requirements have been put forward for the preparation technology and equipment of micron rare metal foil. The research and production of micron rare metal foil has become a hot spot in the industry. The preparation technology of the foil mainly includes mechanical rolling, electrolytic deposition, magnetron sputtering and vacuum thermal evaporation, among which the mechanical rolling method is the most extensive. In the micron foil rolling process, the control of the target size thickness and precision, the good shape, the smooth surface and no defects, the reduction of the broken belt, and the realization of long-roll continuous rolling are the key control points. Through the discussion of the problems in the foil rolling, the three key technologies to ensure the smooth rolling of the foil are analyzed and summarized: (1) foil plate type control technology, (2) foil rolling tension stability control technology, (3) roll grinding technology. When the thickness of the rolled piece is less than a certain thickness value, whether the rolling force is increased or the capacity of the equipment is increased, the thickness of the rolled piece cannot be further reduced, this thickness is called the minimum rollable thickness. In the micron foil rolling process, there are currently two main rolling methods, one is synchronous rolling, the other is asymmetric rolling, and the relevant rolling model is obtained. In the process of preparing micron-sized rare metal foils, many aspects that are contrary to conventional dimensional materials have also been found, and further research is needed on the mechanism of the phenomenon. This also provides a new direction for subsequent rare metal foils. This paper introduces the domestic and foreign foil preparation technology and equipment, and analyzes the research status of key technologies in the process of preparing micron rare metals. The minimum rolling thickness theory of two rolling conditions, synchronous rolling and asynchronous rolling, in micron-sized foil rolling is introduced, and simply analyzes the phenomenon that occurred during the rolling process of micron-sized foil.
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2020, Vol. 34 
