The project of “Wide and ultra-thin iron-based nanocrystalline strip” submitted by Qingdao Yunlu Joint Company won the Special Prize of Science and Technology Award of 2021 metallurgy

The 2021 of the China Iron and Steel Association and the China Metal Association's Metallurgical Science and Technology Award have been announced recently, five companies, including Qingdao Yunlu Advanced Material Technology Co. , Ltd. and Antai Science and Technology Co. , Ltd. , and Jiangsu JICUI Antai Pioneer Advanced Energy Materials Research Institute Co. , Ltd. , won the 2021 prize for “Engineering Technology Development and application of wide and ultra-thin iron-based nanocrystalline strip”.
The “Metallurgical Science and Technology Award” is the highest science and Technology award in the steel industry officially approved by the State Ministry of Science and Technology of the People's Republic of China. It is divided into four grades, namely, the grand prize, the first prize, the second prize and the third prize, it is of great significance to promote scientific and technological innovation and progress in China's metallurgical industry.
Project background
In recent years, with the invention of the third generation wide band-gap semiconductor and the breakthrough of industrial application technology, the design and application of high-frequency high-power, low-loss electromagnetic components become possible, nanocrystalline soft magnetic alloy has the advantages of high saturation magnetic induction, high permeability and low loss. It is the most excellent soft magnetic material in the frequency range of 3kHz-100kHz, it has become the core and basic material to promote the development of high frequency, high efficiency, miniaturization, light weight and low energy consumption in power electronics, new energy vehicle, smart grid and information communication. The performance requirements of ultra-thin (≤18μm) , high frequency permeability (μ100khz > 30000) and low loss (p0.5 t, 10kHz ≤3w/kg) are put forward in the fields of electronic components, information communication, new energy vehicle and consumer electronics High-power and high-frequency transformers in the fields of smart grid and rail transit require nanocrystalline materials with wide width (≥100mm) , ultra-thin (14-18μm) and low loss (p0.5 t, 10kHz ≤3w/kg) . The continuous emergence of new application fields provides a broad application prospect for the development of soft magnetic materials.
Before the project began, the strip production at home and abroad were adopted discontinuous single ladle process, single furnace molten steel only 200-300 kg, annual capacity less than 300 tons, low production efficiency. The width of nanocrystalline strip supplied in China is less than 60mm, the thickness of nanocrystalline strip is more than 20μm, the loss is high (p0.5 t, 20kHz > 30W/kg) , the consistency is poor and the cost is high. The problem of nanocrystalline nanocrystalline strip with wide width and ultra-thin width is very prominent in China, which restricts the advanced development of Power Electronics, information and communication, new energy automobile and the modernization of industrial chain, therefore, it is urgent to break through the bottleneck of industrial development and realize the continuous production of high-quality wide and ultra-thin nanocrystalline strip.

Cloud Drive results

Qingdao Yunlu has been adhering to independent innovation, industry for the country's original intention, through joint technical research, development of ultra-thin nanocrystalline strip continuous production equipment and manufacturing process, it fills the blank of wide-width ultra-thin nanocrystalline strip and continuous manufacturing technology. At present, the width of nanocrystalline ultrathin strip produced by Qingdao Yunlu is up to 142mm, which can meet the performance and size requirements of high power medium and high frequency magnetic devices, and the thickness of nanocrystalline ultrathin strip is up to 14 ~ 18μm, have High technical barriers and barriers. Since volume production in 2019 focus on emerging industry market expansion, gradually replace traditional magnetic materials such as ferrite market space.

Market applications

Wide and ultra-thin fe-based nanocrystalline strip has been highly recognized by the high-end market for its low loss, high magnetic conductivity, wide and ultra-thin properties, etc. , as a key strategic material widely used in the next generation of information technology, smart grid, rail transit, new energy vehicles and other fields, will support the one hundred billion yuan industrial cluster; Magnetic components are also widely used in traditional industries such as home appliances (microwave ovens, air conditioners, refrigerators, washing machines, LED televisions, air purifier, dishwashers, ovens, water heaters, etc.) , power supplies (UPS, PC computers, servers, medical care, etc.) , welders and solar inverter, good economic and social benefits have been achieved. In addition to the above applications, it can also be used in power electronics high-frequency transformer, support to solve the smart grid wind, solar and other renewable energy large-scale grid-connected problems.

The research and development of this product directly promotes the high-end, miniaturization and intelligentization of the inductive and resistive power electronic devices and equipment in our country, and drives the upgrade and replacement of the power transformer, for China's new energy vehicles, power electronics, smart grid, a new generation of communications, rail transit, wireless charging, consumer electronics and other fields to provide the rapid development of key core basic materials, it improves our country's independent guarantee ability, independent innovation ability, technical breakthrough and industrial development in the aspect of high-power power electronic equipment.