Gupta, S K and Kumar, Sanjeev and Patwari, Anand Ganvir and Chatterjee, A and Ghosh, Somnath (2016) Control of sulphur and minimisation of centre line segregation for Rail Steel. Journal of Metallurgy and Materials Science, 58(4) (IF-0.04). pp. 243-250.
Rail is the most important constituent of the track structure and plays a very vital role in the reliability of railway system as a whole. Quality of rail steel with reference to its chemical composition has been a matter of prime importance for the manufacturers as well as Railways. Sulphur is a detrimental element in rails since it causes hot shortness during rolling, centerline segregation during casting, poor weldability for the rails etc. To improve quality of rails, a substantially low range of sulphur < 0.015% (Railway's specified norms <0.03%) has been targeted in Bhilai Steel Plant by adequate sulphur control measures in steelmaking process. A two stage desulphurisation treatment is now employed in which the blast furnace hot metal is first treated by co-injection of Mg and CaC reagents, and subsequent treatment with a 2 synthetic slag former (CaO-Al O ) added to the ladle during tapping from the Basic 2 3 Oxygen furnace. Improvement in the internal quality of the cast bloom has been established by introduction of Electro Magnetic Stirring. The centerline segregation is minimized vis-a-vis the properties of the cast product and rails improved by the successful implementation of step by step control measures.
|Uncontrolled Keywords:||Sulphur, Centreline segregation, Synthetic slag and Electro magnetic stirring.|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||17 Aug 2017 14:01|
|Last Modified:||15 Sep 2017 16:47|
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