Daye Special Steel Creates a New Benchmark for High-End Bearing Steel Through Technological Innovation

With the rapid development of clean energy and efficient transportation, the stable operation of large equipment such as wind turbines and high-speed trains cannot be separated from the support of high-quality bearings. The core material of these bearings, bearing steel, is known as the "king of steel" because of its stringent performance requirements. Daye Special Steel Co., Ltd., a subsidiary of CITIC Pacific Special Steel Group, has made significant breakthroughs in this field with its strong R&D strength and innovation capabilities.

Daye Special Steel has always taken market demand as the research and development orientation, focusing on improving the purity and uniformity of bearing steel. The company's independently developed steel for high-power wind turbine main shafts of 16 megawatts and above has won market favor with its excellent reliability and ultra-long service life, becoming a leader in the industry.

Walking into the production workshop of Daye Special Steel, the heat wave hits you, and the huge forging equipment is running at high speed. A steel ingot with a diameter of more than 1 meter is processed by a 60 MN fast forging unit and forged into a steel bar of more than 5 meters in a few minutes. Subsequently, these products must undergo a number of rigorous tests such as ultrasonic flaw detection to ensure foolproof quality. According to technical personnel, this forging process can effectively improve the uniformity of materials and provide solid guarantees for subsequent applications.

The main bearing of the shield machine is called the heart of the "underground dragon" and is extremely difficult to manufacture. When developing the main bearing material of the 8.61-meter-diameter shield machine, Daye Special Steel innovatively adopted digital simulation technology and optimized casting technology to successfully solve the performance problems of large-size and high-tonnage materials. This achievement not only marks that the domestic ultra-large diameter main bearing technology has reached the world's leading level, but also provides strong support for the construction of major projects in my country.

In the field of high-speed rail, Daye Special Steel also performed well. The company took the lead in developing materials that meet the needs of high-speed rail bearings at a speed of 350 kilometers per hour and achieved batch supply. In addition, in response to the needs of future high-speed trains with a speed of 450 kilometers per hour, the company successfully broke through the technical bottleneck of "high-speed fatigue failure" by optimizing the composition design and adopting advanced low-titanium and low-oxygen smelting processes, further improving the reliability of the product.

The field of aviation engines is another important battlefield for high-end bearing steel. Daye Special Steel has successfully developed high-quality aviation bearing steel through a rigorous trial production and certification process, and has been recognized by many internationally renowned companies. This not only fills the domestic technology gap, but also helps my country's aerospace industry to reach a new level.