含钛焊丝钢小方坯连铸水口的结瘤机制

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Abstract The properties of inclusions in the welding wire steel and phases of caster nozzles were investigated by SEM, and the forming mechanism of the nozzle clogging was also studied by thermodynamic calculation. The results shows that large amounts of Al2O3 and TiO2 inclusions exist in the molten steel at the end of LF refining, and precipitates on the inner nozzles to form the clogging of alumina type, titania type, and two both individually, the continuous heats are merely 4. By optimizing the relationship of ［Al］-［Ti］-［O］ to make the content of w(［Al］) above the equilibrium line between Al-Ti, w(［Ti］)/w(［Al］)4/3>84.49, and w(［Ti］)/w(［Al］)>7.46, when w(［Al］) less than 0.0068%, the Al2O3 inclusions decrease obviously, the nozzle clogging can be efficiently reduced, and the continuous casting heats increase to 6.

Received: 01 November 2012 Published: 18 July 2013

PACS:

TF065

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	MA De-Gang
	CHANG Jin-Bao

Cite this article:

MA De-Gang,CHANG Jin-Bao. Clogging Mechanism of Nozzles for Billet Continuous Casting of Welding Wire Steel Containing Titanium[J]. Iron and Steel, 2013, 48(7): 27-31.

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http://www.chinamet.cn/Jweb_gt/EN/ OR http://www.chinamet.cn/Jweb_gt/EN/Y2013/V48/I7/27

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