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| Deoxidization Process With Low Aluminum Addition for Heavy Rail Steel |
| WU Wei,LIU Liu,LI Jun |
| Metallurgical Department, Central Iron and Steel Research Institute, Beijing 100081, China |
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Abstract Because of big influences of aluminum inclusions on the performance of heavy rail steel, and the reason why steel rail generates fatigue fracture is aluminum oxide inclusion in the steel by aluminum deoxidization, it is very necessary for heavy rail steel to reduce the quantities of Al2O3 inclusion in the deoxidization process with aluminum. So it is very important for heavy rail steel to adopt deoxidization methods with low aluminum addition. According to the characteristic of deoxidization with low aluminum addition, the control of aluminum content, the diffuse deoxidization technology in ladle furnace, vacuum deoxidization process by carbon, inclusion modification technology by calcium treatment are studied, which are applied to production practice. Results show that if deoxidization process with low aluminum addition is adopted, the total oxygen content in the steel is decreased below 20×10-6 by the methods of controlling slag composition, deoxidization technology by carbon in RH, calcium treatment process, which meets the requirement of clean heavy hail steel.
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Received: 01 January 1900
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2007, Vol. 42 
