摘要
通过钢液与夹杂物之间的热力学平衡计算,研究了20CrMnTiH1精炼钢水中Al_2O_3夹杂物钙处理后可能变性的程度和CaS夹杂生成条件。计算结果表明,[S]0.020%～0.035%、[Al]0.02%～0.04%的钢水进行钙处理时易生成稳定的CaS,并且铝脱氧的产物Al_2O_3难以完全变性成低熔点钙铝酸盐12(CaO)·7(Al_2O_3)。为使Al_2O_3完全变性成低熔点(CaO)·(Al_2O_3)和12(CaO)·7(Al_2O_3)钙铝酸盐,在精炼过程应在低[S]和温度≥1600℃情况下对钢水进行钙处理,软吹氩搅拌后进行喂硫线操作,同时可以显著减少水口堵塞的发生。
The extent of modification of Al2O3 inclusion and factor of CaS inclusion formation in refining liquid of steel 20CrMnTiH1 after calcium treatment have been studied by thermodynamics equilibrium calculation between liquid steel and inclusions. Calculated results show that with calcium treatment of liquid steel containing 0. 020% - 0. 035% [ S] and 0. 02% -0.04% [Al] , the stable CaS forms easily and the aluminum deoxidizing product Al2O3 is not easily modified to low-melting calcium aluminate 12 （CaO）·7 （Al2O3）. In order to completely modify the Al2O3 to low-melting calcium aluminate（ CaO）·（Al2O3 ） and 12 （ CaO ）·7 （ Al2O3）, in refining process the calcium treatment of liquid steel should carry out in conditions of low [ S] and ≥1600℃, and the sulfur wire feeding operation carries out after soft argon stirring, it is available to obviously decrease the occurrence of nozzle blocking.
出处
《特殊钢》
北大核心
2010年第2期1-4,共4页
Special Steel
关键词
20CrMnTiH1含硫齿轮钢
钙处理热力学夹杂物变性控制
Gear Steel 20CrMnTiH1 Containing Sulfur, Calcium Treatment, Thermodynamics, Control of Inclusion Modification
