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The Effect of Al‐Mg Deoxidation on the Cleanliness of Steel during the Electroslag Remelting Process
Author(s) -
Liu Weijian,
Li Jing,
Wang Hao,
Shi Chengbin
Publication year - 2019
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201900185
Subject(s) - metallurgy , materials science , oxygen , non metallic inclusions , inclusion (mineral) , mineralogy , chemistry , organic chemistry
Herein, the effect on inclusions and oxygen content of steel with Al‐Mg deoxidant addition during the electroslag remelting (ESR) process is studied. Combined with thermodynamics, the evolution mechanism of inclusions during the ESR process is analyzed. The results indicate that the inclusions in the consumable electrode are SiO 2 ‐Al 2 O 3 ‐MnO complex inclusions, where most are located in the 1873 K low‐melting‐temperature region. The inclusions in remelted ingots are mainly Al 2 O 3 and small amounts of MnS in the Al‐Mg deoxidant‐free trials, and the inclusions are in the size of 1–3 μm. In the Al‐Mg deoxidant addition trial, the main inclusions are Al 2 O 3 , MgO‐Al 2 O 3 , CaO‐Al 2 O 3 ‐MgO, and CaO‐Al 2 O 3 . The proportions of CaO‐Al 2 O 3 ‐MgO and CaO‐Al 2 O 3 inclusions increase with the increase in the deoxidant.