Effect of nitrogen-containing alloy and N2 injection on nitrogen absorption and cleanliness of molten steel in RH vacuum DOI
Wenliang Dong,

Yuan Fang,

Baisong Liu

et al.

Ironmaking & Steelmaking Processes Products and Applications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

The industrial trials of N 2 injection and nitrogen-containing alloy addition for increasing the nitrogen content in molten steel were carried out on a 300 t ladle Ruhrstahl–Heraeus (RH) treatment. effects order addition, as well vacuum chamber pressure dissolution rate investigated. A model RH was established predicted result good agreement with measured. equilibrium [N] contents corresponding to 7.5–8.5 kPa, 3.0–4.0 kPa <0.1 160–170 ppm, 110–130 ppm 90–100 respectively. increase slow only injection, not further increased after reaching equilibrium. fast while rapidly rised supersaturation state if amount brought by exceeded Thereafter, decreased near value. led deterioration cleanliness steel, earlier alloys had more time remove inclusions reduce T.O content.

Language: Английский

Effect of nitrogen-containing alloy and N2 injection on nitrogen absorption and cleanliness of molten steel in RH vacuum DOI
Wenliang Dong,

Yuan Fang,

Baisong Liu

et al.

Ironmaking & Steelmaking Processes Products and Applications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

The industrial trials of N 2 injection and nitrogen-containing alloy addition for increasing the nitrogen content in molten steel were carried out on a 300 t ladle Ruhrstahl–Heraeus (RH) treatment. effects order addition, as well vacuum chamber pressure dissolution rate investigated. A model RH was established predicted result good agreement with measured. equilibrium [N] contents corresponding to 7.5–8.5 kPa, 3.0–4.0 kPa <0.1 160–170 ppm, 110–130 ppm 90–100 respectively. increase slow only injection, not further increased after reaching equilibrium. fast while rapidly rised supersaturation state if amount brought by exceeded Thereafter, decreased near value. led deterioration cleanliness steel, earlier alloys had more time remove inclusions reduce T.O content.

Language: Английский

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