Recently, at the processing site of Dongfang Electric Co., Ltd., TISCO-made yoke steels were sheared, cut, punched and slotted, before being stacked into a column shape that is 16.2m in diameter and 100mm in height. The column is a model of motor rotor for Baihetan Hydropower Project of Three Gorges Group. Later, a series of parameter simulation tests were done. Test results showed that, the stacking parameters of TISCO made yoke steel are all qualified. It means TISCO material is ready for further processing and assembly.
Baihetan Hydropower Station is the largest hydropower project under construction in the world, with a total installed capacity of 16 million kilowatts. Sixteen hydroelectric generating sets with independent intellectual property rights, each with a worldwide largest single capacity of 1 million kilowatts, are respectively arranged in the underground workshops on the left and right banks. The motor rotor of Baihetan Hydropower Project developed by Dongfang Electric Machinery Company has an excircle diameter of 16.2 meters, a maximum height of 4.1 meters and a total weight of about 2,000 tons, which is currently the largest rotor in hydropower stations under construction. Rotor is the core component of hydro-generator set. It is composed of central body, sector bracket, main stud, yoke and magnetic pole. The yoke, made of yoke steel, to which magnetic poles is attached, bears huge moment of inertia, and at the same time serves as a part of magnetic circuit. As high strength, high precision and high magnetism are all necessary properties to yoke steel, it imposes great difficulties and extreme accuracy requirements to the production technology of this material, leaving a void in Chinese market for a really long time.
Without a breakthrough in key materials, there would be no thrive for Chinese manufacturing industry. With the implementation of large-scale key projects in China, the steel production localization is accelerated. In recent years, TISCO has persisted in scientific and technological innovation, and gradually mastered the key production technologies of high-strength yoke steel materials for giant hydropower equipment. TISCO's high-grade yoke steel products have an outstanding flatness of less than 1mm/m, which successfully surpasses many world-famous high-strength steel manufacturers. Today, TISCO products and completely replaced imports.
During the negotiation of the contact, TISCO marketing team adhered to the "housekeeping" and "package" marketing concept and kept in-depth communication with users, close production tracking, and quick information feedback, which are highly praised and trusted by the owners and users. Their success in gaining the contact has expanded the application of the company’s products and enable the company to make contributions to many more national key projects.
At present, TISCO's high-grade yoke and magnetic pole steel products have been applied to more than 100 large-scale hydropower projects both home and abroad, including projects built on Jinsha River, Lancang River, Yalong River and Dadu River. With TISCO-made yoke steels present in Baihetan Hydropower Project, "TISCO Core" once again is applied to the most important projects of the nation.