"Hand-shredded steel" has been introduced several times, so everyone must be familiar with it. Today let's take a look at the new member of the steel family – "Cicada Wing Steel" (also known as "5G Steel"), which is as thin as a cicada wing and as light as a mirror!
Recently, the newly revised undergraduate admission notice of the University of Science and Technology Beijing was unveiled: using steel as paper! The main body of the admission notice is made of "Cicada's Wing Steel" which is as thin as a cicada's wing, as light as a mirror, as hard as iron, and as flexible as pine.
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The thickness of "Cicada Wing Steel" can be as thin as 0.07mm. It is mainly used for 5G base station signal receivers, signal transmission filters, integrated circuit boards, etc., also known as 5G steel.
In fact, this is not its first appearance. During the 2022 Beijing Winter Olympics, "Cicada Wing Steel" transformed into a Winter Olympics postcard. The 15 sports shapes and 15 sports icons of Beijing Winter Olympics mascot Bing Dundun are presented in the hard-tempered "cicada wing steel", composing the "Song of Ice and Fire".
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"Cicada Wing Steel" products are quite popular in the cultural and creative field. On October 16, 2022, China Post issued the national version of the "Cicada Wing Steel" postcard for the "Twentieth National Congress of the Communist Party of China". The postcard is made of the high-tech steel "Cicada's Wing Steel" produced by Shougang Jingtang Company. The Great Wall on the advertising surface of the "Cicada's Wing Steel" postcard adopts hollowing technology. The Great Wall's transparent steel technology is highly integrated with the picture, showing the "Great Wall of Steel".
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"Cicada Wing Steel" belongs to the steel for 5G equipment produced by Shougang Jingtang Company. The thickness range is 0.07~0.15mm, which is only equivalent to the diameter of a hair. It is very important for steel purity, mechanical properties, thickness accuracy, plate shape and surface. Quality requirements are very strict. "Thin" and "glossy" are the characteristics of this product, and they are also the difficulties in production. With more than 300 small processes and thousands of quality control points, Jingtang Company has successfully solved the ultra-high quality problem with its strong comprehensive manufacturing capabilities and refined management level. There are many bottlenecks and bottlenecks such as the high-efficiency control technology of tiny inclusions in thin specifications, the high-speed and stable strip threading and flatness control technology of ultra-thin acid continuous rolling with variable thickness, and the secondary cold rolling technology of ultra-thin specifications with a large aspect ratio.
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"It is very difficult to reduce the thickness by even 0.01 mm and requires the coordinated efforts of all production departments." Mo Zhiying, senior engineer of Shougang Metal Materials, has a deep understanding of this. In the steelmaking process, the carbon and oxygen content of the entire furnace of Shougang Jingtang Steelmaking Converter (a key indicator for measuring the cleanliness of molten steel) has reached the international leading level, and it has first produced pure slabs with a thickness of 230 mm and a width of 1 meter. In the hot rolling and cold rolling processes, the slab gradually becomes thinner during multiple rolling and annealing processes. In February 2022, the thickness of Shougang's "Cicada Wing Steel" was successfully reduced to an ultra-thin specification of 0.07 mm, marking a new level of Shougang Jingtang's high-end product manufacturing capabilities.
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After being launched on the market, "Cicada Wing Steel" has been favored by new energy vehicle companies, communications companies, and food companies at home and abroad, and orders are coming in like a snowflake.
