The thinnest stainless steel foil in the world developed by TYGT Stainless Steel Technology Group has a thickness of 0.02 mm, only a quarter of A4 paper, and a width of 600 mm.
In the past, "ultra-thin stainless steel foil" was only produced in Germany, Japan and other countries. It produced narrow-width "ultra-thin stainless steel foil". The 600mm wide "ultra-thin stainless steel foil" developed by TYGT filled the gap in this field in China. , And received widespread attention at home and abroad.
As early as 1998, China invested in the construction of a precision strip production line, but in the initial stage it was unable to produce precision stainless steel strips of about 0.01-0.1 mm and could only be imported.
"Ultra-thin stainless steel foil" is a wide-width soft stainless steel foil, which is a high-end product in the field of stainless steel strip. Different from conventional stainless steel sheet, stainless steel precision strip refers to cold-rolled stainless steel strip with special ultra-thin specifications. Its thickness is generally between 0.05 mm and 0.5 mm, and it is called stainless steel foil below 0.05 mm. At present, most of the soft stainless steels on the market are 0.05 mm.
"Ultra-thin stainless steel foil" is a precision product, or a high-end product in the field of strips, so it must meet strict dimensional accuracy, brightness, mechanical properties, etc. requirements, so the quality control requirements are very high, and the production is very difficult .
From the perspective of dimensional accuracy, to reach the standard of "ultra-thin stainless steel foil", its thickness must be controlled below 0.025 mm, and the error must be controlled at the level of one thousandth of a millimeter.
From the point of view of mechanical properties, the grain size should be controlled between 7-9 levels. Reaching level 9 indicates that it is already an ultra-fine fine particle size. The smaller the fine particle size, the higher the strength and hardness, and the ductility and toughness. Also stronger.
In terms of brightness, due to its low surface roughness, its ability to reflect light is very strong, and it can even be used as a "mirror".
As early as 2008, TYGT set the production of the thinnest stainless steel as its research and development goal. To this end, a set of world-class process equipment is specially configured, and process management is continuously strengthened, and the level of process technology is improved. After years of accumulation, a R&D team of "ultra-thin stainless steel foil" was formed in 2016.
The production of "ultra-thin stainless steel foil" needs to overcome four major technical problems: rolling, annealing, high-grade surface control and performance control. The "ultra-thin stainless steel foil" bright annealing line has to pass through a 260-meter-long strip channel, and the most likely problem is that the strip is broken.
After more than two years of continuous attempts, the R&D team has overcome 175 equipment problems, 452 process problems, and experienced more than 700 failures, and finally achieved mass production of "ultra-thin stainless steel foil" in 2018.
Compared with the narrow "ultra-thin stainless steel foil" produced in Japan, Germany and other countries, the 600 mm wide "ultra-thin stainless steel foil" developed by TYGT is a cutting-edge product higher than the industry standard and is popular in the market. The sales manager of TYGT said: "In the past, salespeople took the initiative to find customers. However, the number of orders from customers who took the initiative to find door-to-door cooperation has increased exponentially, and there are some application areas that we can't even think of."
TYGT`s newly put into production the world`s toughest “ultra-thin stainless steel foil”—flexible screen steel is characterized by its thickness as thin as a cicada's wings, soft as silk, translucent, reflecting mirror-like luster, and reflecting the human face. Only 0.03 mm, can withstand 200,000 consecutive folds. Flexible screen steel has been applied to high-tech fields such as flexible display screens, flexible solar modules, sensors, and energy storage batteries.
What is the use of "ultra-thin stainless steel foil"?
The technical indicators of precision stainless steel strip are extremely demanding, which also makes the strip excellent in performance indicators, such as high strength, corrosion resistance, oxidation resistance, abrasion resistance, heat resistance and light resistance, exquisite appearance and easy processing, so It has become an important part of enhancing product style. For example, in 2015 the company's precision stainless steel strip material passed Apple's certification and became the logo material for the manufacture of iPhone and iPad!
Of course, the use of precision stainless steel strip is not limited to the production of Apple LOGO. For example, it is used in engine combustion chamber accessories with high material requirements, and lithium-ion batteries. The former is resistant to high temperature, the latter requires corrosion resistance, and these positions have extremely high requirements on the thickness and strength of the material.
At present, TYGT`s high-end product creation efficiency has reached 80%, 18 kinds of special steel products have become the first in China, 26 kinds of market share are the first, more than 40 kinds have replaced imports, stainless steel exports are the world’s largest, and the company owns more than 800 There are more than 100 world-leading stainless steel core patent technologies.