超低碳IF钢脱氧合金化过程中夹杂物的行为

doi:10.13228/j.boyuan.issn0449-749x.20190452

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Abstract In order to deepen insight on the inclusions behavior in the ultra-low carbon IF steel during the deoxidation and alloying process, laboratory experiments were carried out to simulate the corresponding industrial process using a Si-Mo heated high-temperature furnace, and the inclusions were studied in detail by densely sampling during the experiment. It was found that before adding Al, the inclusions in the molten steel were mainly spherical FeO_x. After adding Al, the light-black sphere Al₂O₃ formed firstly, then transformed into spheroidal or bulk shaped Al₂O₃, followed by the irregular Al₂O₃ rapidly, and finally cluster Al₂O₃ formed by aggregating. The whole transformation of Al₂O₃ was completed within around 2 min after adding Al. After adding Ti, three types of Al-Ti complex inclusions formed. However, they would transform into stable Al₂O₃ around 4 min after adding Ti. The total oxygen content and the amount of inclusions showed a decreasing trend during the deoxidation and alloying process, and the cleanliness of molten steel improved gradually.

Key words： ultra-low carbon IF steel inclusion deoxidation and alloying evolution mechanism

Received: 08 October 2019

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	Articles by authors
	YU Hui-xiang
	PAN Ming
	YANG De-xin

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YU Hui-xiang,PAN Ming,YANG De-xin. Behavior of inclusions in ultra-low carbon IF steel during deoxidation and alloying process[J]. Iron and Steel, 2020, 55(6): 46-53.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190452 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I6/46

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