In china. greases power with the development and application of continuous casting round billet

China. greases power with the development and application of continuous casting round billet specifications - 2019 12 - 28 along with the rapid development of national economy, increasingly strengthen environmental protection, green development, traditional thermal power by inefficient high consumption 'subcritical units' to' ultra supercritical units' development of high efficiency low, at the same time have led to the introduction of clean and renewable 'wind'. To meet 'ultra supercritical unit thermal power required for large diameter steel pipe and' wind turbines needed a large diameter gear and bearing ring forging production requirements, in china. greases developed power continuous casting round billet with specifications. The product has a large number of replacing die casting material, instead of imported products. After years of technological innovation and development, china. greases are now able to high quality, high stability of production & phi; 500mm、φ φ600 mm; φ700 mm; φ800 mm; φ900 mm; 1000 mm large specification continuous casting round billet. Power with specifications continuous casting round billet production process is: the blast furnace hot metal ( KR) after processing + quality scrap Converter ( BOF） - Refining outside the furnace, LF） - The vacuum circulation degassed furnace ( RH) - Arc continuous casting of CCM ( EMS) - Slow cooling - （ Annealing) - Blasting surface treatment - Grinding - Inspection - Packaging - Logo - Measurement - Delivery of the goods. Which used in the process of continuous casting mold electromagnetic stirring, electromagnetic stirring and special mould protection slag at the end, has solved the big specification low-speed casting round billet surface of molten steel during solidification of technical problems, adopt the technology development of the continuous casting round billet has the composition of the narrow, high purity and good slab internal quality, surface defect, etc. The process equipment, production technology in domestic special steel industry leading level. In china. greases & phi; More than 500 mm specifications continuous casting round billet of main characteristics are as follows: 1) Carbon and alloy composition segregation; 2) Molten steel purity is high, based on ladle refining outside the furnace, the five elements and low content of nonmetallic inclusions, inclusion quantity and form has been effectively control; 3) Steel low gas content, 100% vacuum degassing treatment, make gas content in molten steel is reduced to a minimum; 4) Good mechanical properties, good comprehensive performance, strong namely has excellent strength and hardness at the same time, also has good plasticity; 5) Round billet surface cracks and other defects, high dimensional accuracy. The product with its high quality, low cost, high efficiency, large size and other advantages, to meet the urgent needs of the market, has been widely used in supercritical thermal power high pressure boiler tube and wind power required a large diameter gear and bearing ring forging, not only get the favour of domestic ring forging, steel enterprises, and foreign top power and equipment user certification and accreditation, and is designated as the raw material suppliers, high-end wind power, thermal power, steel market share of more than 65%. Extra-large (continuous casting round billet of successful development, improve the efficiency of the traditional power generation industry, greatly promoted the large-scale wind power clean energy, at the same time, the development of high-end, made contribution to energy conservation and emissions reduction. （ The product has won the China iron and steel product development for the year of 2018 market development award) The abstract from the world metal herald 2019 16 part B01