宋明明等：稀土处理C-M钢显微组织和夹杂物演化 ·1569· 2a]+2[O]+[S=La,0,S(s), 2014,54(3):536 △，G9=-1425956+351.10T,Jmol-: (2) ]Zheng W,Wu Z H,Li G Q,et al,Effeet of Al content on the [La]+[S]Las(s), characteristics of inclusions in Al-Ti complex deoxidized steel with △，G9=-445225+141.47T,Jmol-1: calcium treatment.IS/J Int,2014,54(8)1755 (3) 8] Kang Y,Jang J,Park J H,et al.Influence of Ti on non-metallic 2a]+3[S]=la,S3(s), inclusion formation and acicular ferrite nucleation in high-strength △，G9=-1201018+425.00T,Jmol-: (4) low-alloy steel weld metals.Met Mater Int,2014,20(1):119 La]+[Al+3 O]=LaAlO,(s) [9]Shim J,Byun J,Cho Y W,et al.Effects of Si and Al on acicular △，G9=-801616+28.90T,Jml-1. (5) ferrite formation in C-Mn steel.Metall Mater Trans A,2001,32 (1):75 3结论 [10]Zhang Z,Farrar R A.Role of non-metallic inclusions in forma- tion of acicular ferrite in low alloy weld metals.Mater Sci (1)稀土处理C-Mn钢后，统计结果表明能够诱 Technol,1996,12(3):237 导晶内针状铁素体有效形核的核心主要是含稀土的球 [11]Sarma D S,Karasev A V,Jonsson P G.On the role of non-me- 形复合夹杂物，尺寸主要集中在1~4um. tallic inclusions in the nucleation of acicular ferrite in steels.ISI (2)稀土处理C-Mn钢中晶内针状铁素体有效形 1t,2009,49(7):1063 [12]Koseki T,Thewlis G.Inclusion assisted microstructure control in 核核心主要是在钢液中形成的，冷却和凝固过程中形 C-Mn and low alloy steel welds.Mater Sci Technol,2005,21 成的数量较少 (8):867 (3)稀土夹杂物在钢液温度和冷却和凝固过程下 [13]Barbaro F J,Krauklis P,Easterling K E.Formation of acicular 容易碰撞黏合长大，然后上浮从钢液中去除，MS能在 ferrite at oxide particles in steels.Mater Sci Technol,1989,5 稀土夹杂物颗粒间析出. (11):1057 (4)稀土处理C-Mn钢的夹杂物成分从MnS+硅 04 Yamamoto K,HasegawaT,Takamura J.Effect of boron on intra- 铝酸盐夹杂转变为La,0,S+LaAlO,+MnS+硅铝酸盐 granular ferrite formation in Tioxide bearing steels.ISI/Int, 1996,36(1):80 夹杂，尺寸细化明显 [15]Lee J L.Evaluation of the nucleation potential of intragranular acicular ferrite in steel weldments.Acta Metall Mater,1994,42 参考文献 (10):3291 [Takamura J,Mizoguchi S.Roles of oxides in steel performance// [16]Lee T K,Kim H J,Kang B Y,et al.Effect of inclusion size on Proceedings of the 6th International Iron and Steel Congress.Nago- the nucleation of acicular ferrite in welds.IS/J Int,2000,40 ya,1990:591 (12):1260 2]Mizoguchi S.Control of oxides as inoculants//Proceedings of the [17]Thewlis G.Effect of cerium sulphide particle dispersions on acic- 6th International Iron and Steel Congress.Nagoya,1990:598 ular ferrite microstructure development in steels.Mater Sci B]Suzuki S,Ichimiya K,Akita T.High tensile strength steel plates Technol,2006,22(2):153 with excellent HAZ toughness for shipbuilding:JFE EWEL tech- 18] Wen B,Song B.In situ observation of the evolution of intragran- nology for excellent quality in HAZ of high heat input welded ular acicular ferrite at Ce-containing inclusions in 16Mn steel. joints.JFE Tech Rep,2005,5:24 Steel Res Int,2012,83(5):487 4]Kimura T,Sumi H,Kitani Y.High tensile strength steel plates 9] Wen B,Song B,Pan N,et al.Effect of austenitizing tempera- and welding consumables for architectural construction with excel- ture on microstructure in 16Mn steel treated by cerium.Int J lent toughness in welded joint:JFE EWEL technology for excellent Miner Metall Mater,2011,18(6):652 quality in HAZ of high heat input welded joints.JFE Tech Rep, 20]Wen B,Song B,Pan N,et al.Influence of Ce on characteristics 2005,5:45 of inclusions and microstructure of pure iron.fron Steel Res Int [5]Nako H,Okazaki Y,Speer JG.Acicular ferrite formation on Ti- 2011,18(2):38 rare earth metal-Zr complex oxides.ISI/Int,2015,55(1):250 1]Song MM,Song B,Xin W B,et al.Effects of rare earth addi- 6]Ma W,Bao Y,Wang M,et al.Effect of Mg and Ca treatment on tion on microstructure of C-Mn steel.Ironmaking Steelmaking, behavior and particle size of inclusions in bearing steels.IS//Int, 2015,44(8):594宋明明等: 稀土处理 C--Mn 钢显微组织和夹杂物演化 2［La］+ 2［O］+［S］La2O2 S( s) ， ΔfG = － 1425956 + 351. 10T，J·mol － 1 ; ( 2) ［La］+［S］= LaS( s) ， ΔfG = － 445225 + 141. 47T，J·mol － 1 ; ( 3) 2［La］+ 3［S］La2 S3 ( s) ， ΔfG = － 1201018 + 425. 00T，J·mol － 1 ; ( 4) ［La］+［Al］+ 3［O］LaAlO3 ( s) ， ΔfG = － 801616 + 28. 90T，J·mol － 1 ． ( 5) 3 结论 ( 1) 稀土处理 C--Mn 钢后，统计结果表明能够诱 导晶内针状铁素体有效形核的核心主要是含稀土的球 形复合夹杂物，尺寸主要集中在 1 ～ 4 μm． ( 2) 稀土处理 C--Mn 钢中晶内针状铁素体有效形 核核心主要是在钢液中形成的，冷却和凝固过程中形 成的数量较少． ( 3) 稀土夹杂物在钢液温度和冷却和凝固过程下 容易碰撞黏合长大，然后上浮从钢液中去除，MnS 能在 稀土夹杂物颗粒间析出． ( 4) 稀土处理 C--Mn 钢的夹杂物成分从 MnS + 硅 铝酸盐夹杂转变为 La2O2 S + LaAlO3 + MnS + 硅铝酸盐 夹杂，尺寸细化明显． 参 考 文 献 ［1］ Takamura J，Mizoguchi S． Ｒoles of oxides in steel performance / / Proceedings of the 6th International Iron and Steel Congress． Nago￾ya，1990: 591 ［2］ Mizoguchi S． Control of oxides as inoculants / / Proceedings of the 6th International Iron and Steel Congress． Nagoya，1990: 598 ［3］ Suzuki S，Ichimiya K，Akita T． High tensile strength steel plates with excellent HAZ toughness for shipbuilding: JFE EWEL tech￾nology for excellent quality in HAZ of high heat input welded joints． JFE Tech Ｒep，2005，5: 24 ［4］ Kimura T，Sumi H，Kitani Y． High tensile strength steel plates and welding consumables for architectural construction with excel￾lent toughness in welded joint: JFE EWEL technology for excellent quality in HAZ of high heat input welded joints． JFE Tech Ｒep， 2005，5: 45 ［5］ Nako H，Okazaki Y，Speer J G． Acicular ferrite formation on Ti-- rare earth metal--Zr complex oxides． ISIJ Int，2015，55( 1) : 250 ［6］ Ma W，Bao Y，Wang M，et al． Effect of Mg and Ca treatment on behavior and particle size of inclusions in bearing steels． ISIJ Int， 2014，54( 3) : 536 ［7］ Zheng W，Wu Z H，Li G Q，et al，Effect of Al content on the characteristics of inclusions in Al--Ti complex deoxidized steel with calcium treatment． ISIJ Int，2014，54( 8) : 1755 ［8］ Kang Y，Jang J，Park J H，et al． Influence of Ti on non-metallic inclusion formation and acicular ferrite nucleation in high-strength low-alloy steel weld metals． Met Mater Int，2014，20( 1) : 119 ［9］ Shim J，Byun J，Cho Y W，et al． Effects of Si and Al on acicular ferrite formation in C--Mn steel． Metall Mater Trans A，2001，32 ( 1) : 75 ［10］ Zhang Z，Farrar Ｒ A． Ｒole of non-metallic inclusions in forma￾tion of acicular ferrite in low alloy weld metals． Mater Sci Technol，1996，12( 3) : 237 ［11］ Sarma D S，Karasev A V，Jnsson P G． On the role of non-me￾tallic inclusions in the nucleation of acicular ferrite in steels． ISIJ Int，2009，49( 7) : 1063 ［12］ Koseki T，Thewlis G． Inclusion assisted microstructure control in C--Mn and low alloy steel welds． Mater Sci Technol，2005，21 ( 8) : 867 ［13］ Barbaro F J，Krauklis P，Easterling K E． Formation of acicular ferrite at oxide particles in steels． Mater Sci Technol，1989，5 ( 11) : 1057 ［14］ Yamamoto K，Hasegawa T，Takamura J． Effect of boron on intra￾granular ferrite formation in Ti-oxide bearing steels． ISIJ Int， 1996，36( 1) : 80 ［15］ Lee J L． Evaluation of the nucleation potential of intragranular acicular ferrite in steel weldments． Acta Metall Mater，1994，42 ( 10) : 3291 ［16］ Lee T K，Kim H J，Kang B Y，et al． Effect of inclusion size on the nucleation of acicular ferrite in welds． ISIJ Int，2000，40 ( 12) : 1260 ［17］ Thewlis G． Effect of cerium sulphide particle dispersions on acic￾ular ferrite microstructure development in steels． Mater Sci Technol，2006，22( 2) : 153 ［18］ Wen B，Song B． In situ observation of the evolution of intragran￾ular acicular ferrite at Ce-containing inclusions in 16Mn steel． Steel Ｒes Int，2012，83( 5) : 487 ［19］ Wen B，Song B，Pan N，et al． Effect of austenitizing tempera￾ture on microstructure in 16Mn steel treated by cerium． Int J Miner Metall Mater，2011，18( 6) : 652 ［20］ Wen B，Song B，Pan N，et al． Influence of Ce on characteristics of inclusions and microstructure of pure iron． J Iron Steel Ｒes Int， 2011，18( 2) : 38 ［21］ Song M M，Song B，Xin W B，et al． Effects of rare earth addi￾tion on microstructure of C--Mn steel． Ironmaking Steelmaking， 2015，44( 8) : 594 · 9651 ·