Quality control of 65# high carbon steel produced by MURC-LF-CC

According to the difficulties of the 65# steel-making, the BOF-LF-CC technology was used to produce the 65# high carbon steel. Some measures were taken in the following processes:controlling the raw materials and the charging system, using the MURC multi-functional combined blow, and holding slag in tapping process in BOF session; choosing the appropriate slag system to improve desulphurization, controlling the Al contain and stabilizing the component of hot steel and the temperature in LF refining; choosing the appropriate casting temperature, improving the second cooling, protecting the casting completely, and using the electromag-netic stirring in mold in the casting process. The results show that the low magnification microscopic structure in billet is fine and the carbon segregation exponent is below 1.1, which meets the demand of the steel series. Based on the sampling and analysis of the product quality, the test results meet the requirements of the relevant product standards and reach the advanced level of similar products in China.