1、MnS CaS CaO-CaS TiN NbN AlN 2 3 1. 2011 50% 80% 2. Ti Ds 3. MnS 4 5 10 6 7 8 9 Al2O3 10 Al2O3 11 , 17 2004 p107 12 13 Ar +Al2O3 Takashi MIYAKE, Influence of Sulphur Content and Molten Steel Flow on Entrapment of Bubbles to Solid/ Liquid Interface, ISIJ International, Vol. 46 (2006, No. 12, pp. 18171

2、822 14 - SEN 15 Ar +Al2O3 16 1. Al2O3 (O RH FeO 2. FC 3. Ar +Al2O3 hook 17 - 18 19 1. ASTM A B C D Ds SKF 2. ( +EDS +EPMA EDS PDA Pulse Distribution Analysis 20 JFEY. Awajiya, Entrapment Location in Solidified Shell of Ultra Low Carbon Steel Slab AISTech 20053030 mm 23 3 ASPEX PSEM eXplore2580m m,m

3、10(100m 29Al2O3+AlAl20.480.51(1.5m/min52061mm50m0.210.45/cm2JFEmJFE>100m0.0280.057 /cm2m/min20-50m50-100m100-200m m m m mm2 Al O106317102Al OAl O hook1650C+O=CO 16128446(210t N (- J. Monnot, et al., Amer. Soc. For Test Mat., 1988, p.149 57 DC aO-MgO-Al CaO-CaO-Al2O3T.O36ppm1.RHDS T.O36ppmRHLFH NL

4、F or RHFe t O 65 - JFE 67 69 71 75 77130kg/cm 2182183NMS-ISIJ 200415001500/1./(O Ca Al;2. (O Ca AlxMyO(M y a xMyO(M y xMyO(M (1xMyO(M 13y MxOy (y MxOy (a lnRT a lnRT 00/G =G 567/SiO 2(% CaO (% 5.78.041.644.011.211.854.656.40.050.09Al 3MgO-Al 72.4%1500MgO-Al 2O 315.1% CaO-MgO-Al 2O 381.7%MgO (wt% A30minMgO-Al 2O 378.7%60minMgO-Al 2O 348.5%90minMgO-Al 2O 312.8%.(20CrMnTiAl 3: 45min: 30minT.O<10ppmAl 2O 3MgO-Al 2O 3Al 2O 3MgO-Al 2O 380% Al 2O 3, 17 %MgO3% CaOMgO-Al 2O 3CaO-MgO-Al 3LF MgO -Al 2O 3MgO-Al 2O 3 CaO-MgO-Al 2O 3RHMgO Al 2O 3CaO CaO Al 2O 3: CaO xCaO yMgO zAl (x+1CaO (y-1Mg