折叠屏、新能源汽车上有它们！世界上最薄的钢、最“小”的钢是怎样炼成的？

Group 1 - The core viewpoint of the articles highlights the recovery of China's steel industry, with the PPI index for the steel sector reaching 99.5% in September, an increase of 3.9 percentage points compared to the previous month [1] - The PPI index has shown a significant upward trend since May, coinciding with the industry's first initiative to address "involution" competition [1] - Several steel companies are adopting transformation and upgrading strategies, focusing on differentiated development to maintain the overall interests of the industry chain [3] Group 2 - Wang Wenjin, Executive Chairman of the China Special Steel Enterprises Association, emphasizes the need for a new growth path to resolve the issue of involution, advocating for a specialized and innovative development approach [5] - The first China Special Steel and New Materials Specialized and Innovative Summit recently released a report promoting differentiated development routes for related enterprises, aiming for intelligent and high-end transformation [5] - The production of "hand-tear steel," which is the world's thinnest steel at 0.015 mm thick, has recently achieved full-scale production, with a daily output of approximately 3 tons [7] Group 3 - The "hand-tear steel" is being integrated into various applications, including soft-pack materials for new energy vehicle batteries and components in consumer electronics, enhancing battery capacity and extending device lifespan [9] - The introduction of "hand-tear steel" has significantly improved the durability of foldable screens, increasing their lifespan from 40,000-50,000 folds to potentially 80,000-100,000 folds [11] - The production process of "hand-tear steel" is complex, requiring precise control and collaboration among multiple operators to achieve the desired thickness and quality [13] Group 4 - The articles also discuss the emergence of the world's smallest steel, with particles measuring only 500 microns in diameter, which can be used in advanced applications such as new energy vehicle casting equipment [16] - Powder metallurgy products have a significantly longer lifespan compared to traditional methods, with potential usage life extending from 6,000 to 20,000 molds, and possibly up to 50,000 or 80,000 molds in the future [18] - The annual production capacity of powder metallurgy at Tiangong International has reached 8,000 tons, with applications spanning from complex tools to high-end components for humanoid robots and fusion reactors [20]