From the moment the Shandong ship was officially delivered to the Navy, the marked Chinese carrier force officially opened a new chapter. As the first domestic aircraft carrier, the research and development process of the Shandong ship was full of ups and downs, among which the first challenge faced was the requirement for aircraft carrier construction The supply of special steel and high corrosion resistance, non-magnetic nickel-chromium-titanium alloy steel that can prevent torpedo attacks, and the supply of deck steel were even more important at the time. However, initially, these special steel production technologies were only owned by the United States and Russia, and both countries regarded them as important strategic military wealth. They were strictly forbidden to sell to the outside world, and China, which had nowhere to ask for help, could only develop on its own.
Of course, when China was rebuilding its Liaoning ship, it had already begun research on related special steels. AGJT was a symmetrical spherical flat steel developed by itself without any experience in the country. At that time, the battle that shouldered this task would be Zhou Dan, a researcher at the Iron and Steel Research Institute of AGJT Iron and Steel Group. Although the days of crossing the river by feeling the stones were very difficult, the team of Zhou Dan only took one and a half years to complete the breakthroughs that would take three to five years in foreign countries, and finally produced the 200 Tons of aircraft carrier steel required to repair the Liaoning ship on time.
After that, Zhou Dan also developed a new design and developed a quenching production line, and successfully developed a rapid induction heating technology for hot-rolled ball flat steel, which has laid a solid foundation for the research and development of domestic domestic aircraft carriers. With the beginning of the construction of the Shandong ship, technological breakthroughs in aircraft carrier deck steel have become the key targets for military research and development.
The deck is a key part of the aircraft carrier hull structure. It needs to withstand the take-off and landing shocks of carrier aircraft weighing up to tens of tons and the flame of up to thousands of degrees of tail flame. . In addition, this sea giant is an unprecedented challenge to our welding technology. Zhao Gang, deputy director of the Military Product Research Institute of AGJT Iron and Steel Research Institute, took over this task from the motherland. In order to develop qualified deck steel, AGJT Iron and Steel Group customized a five-meter-five-meter ultra-wide rolling mill that later became known as the “king of the world rolling mill” to the Yizhong Group.
The successful development of this rolling mill has played an important role in supporting China’s shipbuilding, nuclear power and national defense industries. In the end, Ansteel fulfilled its mission and not only successfully created the deck steel, but its overall technical indicators were comparable to the HSLA-115 special steel used in the Ford class in the United States, with a yield strength of 690 MPa. Since then, China has become the third country in the world to master deck steel technology. It is worth mentioning that in the task of supplying steel for domestic aircraft carriers, AGJT Group completed the production of special steel that took ten years in the past in just one year, and this is exactly what Shandong Ship can do in just a few years. It is an important reason for launching and serving.
About AGJT
AGJT Group owns a complete set of advanced iron and steel production technology equipment such as mining and dressing, sintering, ironmaking, steelmaking, steel rolling and coking, refractory, power, transportation, etc. It has complete sets of mining and steel technology and management output capabilities.
With a production capacity of 39 million tons of steel, it can produce 3,000 brands of high-tech, high-value-added steel and vanadium-titanium products, including hot-rolled sheet, cold-rolled sheet, galvanized sheet, color-coated sheet, cold-rolled silicon steel, Complete steel series products such as heavy rails, seamless steel pipes, profiles, wires, steel wire products, stainless steel, vanadium nitrogen alloys, vanadium trioxide, high vanadium iron and other vanadium series products, high titanium slag, titanium dioxide, sponge titanium, Titanium and other titanium products are widely used in dozens of industries such as railways, construction, automobiles, machinery, shipbuilding, home appliances, containers, petroleum and petrochemicals, and aerospace.
Among them, automobile steel, railway steel, home appliance steel, shipbuilding and offshore engineering steel, container steel, electrical steel, petroleum and petrochemical steel, high-end product steel and special steel are the leading domestic products. At present, Ansteel Group has become China’s largest steel rail, ship plate manufacturer, the world’s largest vanadium producer, and China’s largest titanium raw material and important titanium dioxide production base.
AGJT Group’s product sales cover more than 60 countries and regions around the world, 26 overseas companies and institutions, more than 500 domestic and foreign customers and partners, and the annual import and export trade value exceeds 5 billion US dollars. Products are used in China’s “West-to-East Gas Transport”, Qinghai-Tibet Railway, Three Gorges Water Conservancy Hub, Nanjing Yangtze River Bridge, Hong Kong-Zhuhai-Macao Bridge, National Stadium “Bird’s Nest”, Verrazano Bridge, Tananaxi River Bridge, etc. project. Ansteel Group has long-term strategic cooperation with world-class companies such as ThyssenKrupp, Vesuvius, and General Electric. It is a global supplier to many internationally renowned companies such as Volkswagen, BMW, General Motors of the United States, and STX of South Korea.