20CrMnTiH gear steel is produced by EAF (tapping 45 t steel) -LF-CC process flow sheet al Special Steel Works

Bensteel. With controlling arc furnace liquid steel decarburizing amount ≥0. 25% C

insuring decarburizing rate 0. 02% C/min

adding 0. 2% manganese iron before tapping

end [C] ≥0. 10%

adding ferro-aluminium or Si-Ba-Ca-Al by 3. 0 kg/1 for killing

diffusion-deoxidizing by adding 3 〜5 kg/t deoxidant during LF refining

(FeO) ≤0. 5%

and before casting with 0. 1 〜0. 3 MPa argon blowing ≥ 15 min

the ratio of qualified 20CrMnTiH steel products with first inclusion examination increased to 92. 49% from original 88. 35%.