Mg处理对X65管线钢中夹杂物的影响
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摘要
在实验室用真空感应炉冶炼3炉X65管线钢,其中2炉钢进行镁处理。分析非镁处理钢和镁处理钢中夹杂物的变化特征,研究镁处理对X65管线钢中夹杂物的影响。结果表明:1)非镁处理钢中的夹杂物主要是Al_2O_3系夹杂,镁处理钢中的夹杂物类型主要是MgO-Al_2O_3系夹杂;2)镁处理钢中粒径小(1~5μm)的夹杂物比例相对较高,大颗粒(> 15μm)夹杂物明显减少;3)粒径较大的夹杂物主要是Al_2O_3夹杂和靠近低熔点区域的夹杂,靠近镁铝尖晶石成分的夹杂物粒径较小,说明镁处理可使钢中夹杂物变得细小而分散;4)镁处理钢中存在大量的尺寸细小的MgO·Al_2O_3系夹杂物,可以为硫化物的析出提供形核核心,从而减少硫化物在晶界的析出数量。
Three heats of X65 pipeline steel were produced in a laboratory,two of which were treated with magnesium. The characteristics of inclusions in steel were analyzed by SEM-EDS and ASPEX. And the influence of magnesium treatment on inclusions was studied. The results show that,1) the oxide inclusions in steel without magnesium treatment are mainly Al_2O_3 inclusions,while the oxide inclusions are mainly MgO·Al_2O_3 in the steel with magnesium treatment. 2) The proportion of the small size( 1-5 μm)inclusions in magnesium-treated steel is relatively high,and that of large size( > 15 μm) inclusions is obviously reduced. 3) The composition of large-size inclusions are mainly Al_2O_3 and that close the lowmelting-point zone. The inclusions close to MgO·Al_2O_3 spinel composition have smaller size,indicating that the magnesium treatment could make the size of inclusions smaller and disperse the inclusions. 4)Magnesium-treated steel contained a large number of fine MgO·Al_2O_3 inclusions,which could provide nucleation core for the precipitation of sulfide,and thus reduce the precipitation of sulfide at the grain boundary.
Three heats of X65 pipeline steel were produced in a laboratory,two of which were treated with magnesium. The characteristics of inclusions in steel were analyzed by SEM-EDS and ASPEX. And the influence of magnesium treatment on inclusions was studied. The results show that,1) the oxide inclusions in steel without magnesium treatment are mainly Al_2O_3 inclusions,while the oxide inclusions are mainly MgO·Al_2O_3 in the steel with magnesium treatment. 2) The proportion of the small size( 1-5 μm)inclusions in magnesium-treated steel is relatively high,and that of large size( > 15 μm) inclusions is obviously reduced. 3) The composition of large-size inclusions are mainly Al_2O_3 and that close the lowmelting-point zone. The inclusions close to MgO·Al_2O_3 spinel composition have smaller size,indicating that the magnesium treatment could make the size of inclusions smaller and disperse the inclusions. 4)Magnesium-treated steel contained a large number of fine MgO·Al_2O_3 inclusions,which could provide nucleation core for the precipitation of sulfide,and thus reduce the precipitation of sulfide at the grain boundary.
引文
[1]KIM Y M,KIM S K,LIM Y J,et al. Effect of microstructure on the yield ratio and low temperature toughness of linepipe steels[J]. ISIJ International,2002,42(12):1571-1577.
[2]HARDIE D,CHARLES E A,LOPEZ A H. Hydrogen embrittlement of high strength pipeline steels[J]. Corrosion Science,2006,48(12):4378-4385.
[3]王新华,李秀刚,李强,等. X80管线钢板中条串状CaOAl2O3系非金属夹杂物的控制[J].金属学报,2013,49(5):553-561
[4]DOMIZZI G,ANTERI G,OVEJERO-GARCIA J. Influence of sulphur content and inclusion distribution on the hydrogen induced blister cracking in pressure vessel and pipeline steels[J]. Corrosion Science,2001(43):325-339
[5]SUITO H.,INOUE R. Thermodynamics on control of inclusions composition in ultra-clean steels[J]. Transactions of the Iron&Steel Institute of Japan,1996,36(5):528-536.
[6]CARNEIRO R A,RATNAPULI R C,LINS V D F C. The influence of chemical composition and microstructure of API linepipe steels on hydrogen induced cracking and sulfide stress corrosion cracking[J]. Materials Science&Engineering A,2003,357(1):104-110.
[7]TOMITA Y. Effect of desulphurization and calcium treatments on the inclusion morphology of 0. 4 C-Cr-Mo-Ni steel[J]. Journal of Materials Science,1994,29(11):2873-2878.
[8]HIGUCHI Y,NUMATA M,FUKAGAWA S,et al. Inclusion modification by calcium treatment[J]. ISIJ International,1996,36(S):151-154.
[9]魏立国,彭勇,徐惟诚,等. X52管线钢探伤不合的分析[C]//第14届全国钢质量与非金属夹杂物控制学术会议,桂林,2010:46-50.
[10]李永东,王文军,朱志远.管线钢非金属夹杂物控制研究[C]//第15届全国炼钢学术会议论文集,厦门,2008:32-36.
[11]张卫华,陈小伟,闻康,等. X80管线钢中非金属夹杂物的检验及其对钢性能的影响[J].理化检验:物理分册,2009,45(10):628-632.
[12]FU J,YU Y G,WANG A R,et al. Inclusion modification with Mg treatment for 35CrNi3MoV steel[J]. Journal of Materials Science&Technology,1998,14(1):53-56.
[13]YANG J,YAMASAKI T,KUWABARA M. Behavior of inclusions in deoxidation process of molten steel with in situ produced Mg vapor[J]. ISIJ International,2007,47(5):699-708.
[14]JIANG Z H,ZHUANG Y,LI Y,et al. Effect of modification treatment on inclusions in 430 stainless steel by Mg-A1 alloys[J]. Journal of Iron and Steel Research,International,2013,20(5):6-10.
[15]TSUNEKAGE N,TSUBAKINO H. Effects of sulfur content and sulfide-forming elements addition on impact properties of ferritepearlitic microalloyed steels[J]. ISIJ International,2001,41(5):498-505.
[16]ZHANG T S,WANG D Y,LIU C W,et al. Modification of inclusions in liquid iron by Mg treatment[J]. Journal of Iron and Steel Research,International,2014,21(S):99-103.
[17]Zhang T S,Wang D Y,Jiang M F. Effect of magnesium on evolution of oxide and sulphide in liquid iron at 1 873 K[J].JISI,2014,21(12):1073-1080.
[18]ITOH H,HINO M,BAN-YA S. Thermodynamics on the formation of spinel nonmetallic inclusion in liquid steel[J].Metallurgical&Materials Transactions B,1997,28(5):953-956.
[19]黄希祜.钢铁冶金原理[M]. 3版.北京:冶金工业出版社,1981.
[20]PARK J H,LEE S B,GAYE H R. Thermodynamics of the formation of Mg O-Al2O3-Ti Oxinclusions in Ti-stabilized 11Cr ferritic stainless steel[J]. Metallurgical&Materials Transactions B,2008,39(6):853-861.
[21]DIEDERICHS R,BLECK W. Modelling of manganese sulphide formation during solidification,Part I:Description of MnS formation parameters[J]. Steel Research International,2006,77(3):202-209.
[22]CLYNE T W, KURZ W. Solute redistribution during solidification with rapid solid state diffusion[J].Metallurgical&Materials Transactions A,1981,12(6):965-971.
[23]UESHIMA Y,MIZOGUCHI S,MATSUMIYA T,et al. Analysis of solute distribution in dendrites of carbon steel withδ/γtransformation during solidification[J]. Metallurgical&Materials Transactions B,1986,17(4):845-859.
[24]WON Y M,THOMAS B G. Simple model of microsegregation during solidification of steels[J]. Metallurgical&Materials Transactions A,2001,32(7):1755-1767.
[2]HARDIE D,CHARLES E A,LOPEZ A H. Hydrogen embrittlement of high strength pipeline steels[J]. Corrosion Science,2006,48(12):4378-4385.
[3]王新华,李秀刚,李强,等. X80管线钢板中条串状CaOAl2O3系非金属夹杂物的控制[J].金属学报,2013,49(5):553-561
[4]DOMIZZI G,ANTERI G,OVEJERO-GARCIA J. Influence of sulphur content and inclusion distribution on the hydrogen induced blister cracking in pressure vessel and pipeline steels[J]. Corrosion Science,2001(43):325-339
[5]SUITO H.,INOUE R. Thermodynamics on control of inclusions composition in ultra-clean steels[J]. Transactions of the Iron&Steel Institute of Japan,1996,36(5):528-536.
[6]CARNEIRO R A,RATNAPULI R C,LINS V D F C. The influence of chemical composition and microstructure of API linepipe steels on hydrogen induced cracking and sulfide stress corrosion cracking[J]. Materials Science&Engineering A,2003,357(1):104-110.
[7]TOMITA Y. Effect of desulphurization and calcium treatments on the inclusion morphology of 0. 4 C-Cr-Mo-Ni steel[J]. Journal of Materials Science,1994,29(11):2873-2878.
[8]HIGUCHI Y,NUMATA M,FUKAGAWA S,et al. Inclusion modification by calcium treatment[J]. ISIJ International,1996,36(S):151-154.
[9]魏立国,彭勇,徐惟诚,等. X52管线钢探伤不合的分析[C]//第14届全国钢质量与非金属夹杂物控制学术会议,桂林,2010:46-50.
[10]李永东,王文军,朱志远.管线钢非金属夹杂物控制研究[C]//第15届全国炼钢学术会议论文集,厦门,2008:32-36.
[11]张卫华,陈小伟,闻康,等. X80管线钢中非金属夹杂物的检验及其对钢性能的影响[J].理化检验:物理分册,2009,45(10):628-632.
[12]FU J,YU Y G,WANG A R,et al. Inclusion modification with Mg treatment for 35CrNi3MoV steel[J]. Journal of Materials Science&Technology,1998,14(1):53-56.
[13]YANG J,YAMASAKI T,KUWABARA M. Behavior of inclusions in deoxidation process of molten steel with in situ produced Mg vapor[J]. ISIJ International,2007,47(5):699-708.
[14]JIANG Z H,ZHUANG Y,LI Y,et al. Effect of modification treatment on inclusions in 430 stainless steel by Mg-A1 alloys[J]. Journal of Iron and Steel Research,International,2013,20(5):6-10.
[15]TSUNEKAGE N,TSUBAKINO H. Effects of sulfur content and sulfide-forming elements addition on impact properties of ferritepearlitic microalloyed steels[J]. ISIJ International,2001,41(5):498-505.
[16]ZHANG T S,WANG D Y,LIU C W,et al. Modification of inclusions in liquid iron by Mg treatment[J]. Journal of Iron and Steel Research,International,2014,21(S):99-103.
[17]Zhang T S,Wang D Y,Jiang M F. Effect of magnesium on evolution of oxide and sulphide in liquid iron at 1 873 K[J].JISI,2014,21(12):1073-1080.
[18]ITOH H,HINO M,BAN-YA S. Thermodynamics on the formation of spinel nonmetallic inclusion in liquid steel[J].Metallurgical&Materials Transactions B,1997,28(5):953-956.
[19]黄希祜.钢铁冶金原理[M]. 3版.北京:冶金工业出版社,1981.
[20]PARK J H,LEE S B,GAYE H R. Thermodynamics of the formation of Mg O-Al2O3-Ti Oxinclusions in Ti-stabilized 11Cr ferritic stainless steel[J]. Metallurgical&Materials Transactions B,2008,39(6):853-861.
[21]DIEDERICHS R,BLECK W. Modelling of manganese sulphide formation during solidification,Part I:Description of MnS formation parameters[J]. Steel Research International,2006,77(3):202-209.
[22]CLYNE T W, KURZ W. Solute redistribution during solidification with rapid solid state diffusion[J].Metallurgical&Materials Transactions A,1981,12(6):965-971.
[23]UESHIMA Y,MIZOGUCHI S,MATSUMIYA T,et al. Analysis of solute distribution in dendrites of carbon steel withδ/γtransformation during solidification[J]. Metallurgical&Materials Transactions B,1986,17(4):845-859.
[24]WON Y M,THOMAS B G. Simple model of microsegregation during solidification of steels[J]. Metallurgical&Materials Transactions A,2001,32(7):1755-1767.