Behaviour of Rare Earths in Low Sulphur Steel

Qin LIN+;Aisheng LIU;Wen YE;Zongsen YU, Dept. of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China

摘 要：<正> In steels 16Mn and X60 with low S content （0. 003～0. 005%）, rare earth metals （REM） still show ef-fects on purifying the molten steel and controlling the sulphide morphology. The optimum ratio ofRE/S is about 2. 0, which causes lower content of oxygen and inclusions and higher impacttoughness. The amount of REM in solid solution in the steel was determined by means of inductivecoupling plasma （ICP） spectroscopy. The dissolved REM in low S steel could decrease the propor-tion of pearlite and increase the strength of the steel.

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