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史成斌等:低碳含硼钢中BN的析出行为 13 Mater Re,2010,55(3):168 ☑3300K·mi ☐450Kmin 7]Hannerz N E.Critical hot plasticity and transverse cracking in 110K·mn continuous slab casting with particular reference to composition. Trans ISIJ Int,1985,25(2):149 [8]Zhao ST,Wu P,Guo A M,et al.Segregation of boron in the tem- perature range oflower hot ductility of microalloy steels.T Mater Heat Treat,2010,31(11):85 (赵守田,吴平,郭爱民,等.微合金钢高温热塑性低谷区硼 的偏聚.材料热处理学报,2010,31(11):85) 9]Mao X P.Microalloying Technology on Thin Slab Casting and Di- 23 3-55-1010-1515-20 B入N直径m rect Rolling Process.Beijing:Metallurgical Industry Press,2008 (毛新平.薄板坯连铸连轧微合金化技术.北京:治金工业出 图8不同冷却速率钢中BN的尺寸分布 版社,2008) Fig.8 Size distribution of BN in the steel with different cooling rates [1o]Chown L H,Cornish L A.Investigation of hot ductility in Al- killed boron steels.Mater Sci Eng A,2008,494(1):263 凝固前沿粗大BN的生成有利于减少钢中细小的氮化 [11]Jin G X,Du L X,Gao C R.Thermodynamic analysis of boron 物,降低细小氮化物对晶界的钉扎作用 nitride formation in boron microalloyed steel.Northeastern Univ 3结论 Nat Sci,2014,36(4):483 (金光秀,杜林秀,高彩茹.含硼微合金钢中硼氮化物形成 (1)在钢液凝固过程中无微观偏析的条件下,试 的热力学分析.东北大学学报:自然科学版,2014,36(4): 验用钢的化学成分不满足BN在凝固前沿析出的热力 483) 学条件:在考虑钢液凝固前沿溶质元素微观偏析时,当 [12]Yin SC,Hajime K,Mitsuru T.The precipitation behavior of bo- ride during cooling.Acta Metall Sin,1982,18(5):559 固相率∫>0.981时,BN的生成满足热力学条件. (尹士科,小松肇,谷野满.冷却过程中硼化物的析出行为 (2)在凝固前沿随着固相率的增加,B和N均会 金属学报,1982,18(5):559) 发生偏析.其中,凝固前沿B的偏析更为显著.当固 [13]Chen J X.Common Charts and Data Book for Steelmaking.Bei- 相率接近于1时,硼在剩余液相中的实际含量远高于 jing:Metallurgical Industry Press,2010 氮元素的含量,N的扩散是BN长大的限制性环节. (陈家样.炼钢常用图标数据手册.北京:治金工业出版社, (3)钢液的冷却速率对凝固前沿B和N元素的偏 2010) [14]Evans D B,Pehlke RD.Aluminum-nitrogen equilibrium in liq- 析无显著影响,而对析出BN的尺寸有明显影响.随着 uid iron.Trans Metall Soc AIME,1964,230(7)1651 冷速的增加,BN长大所需的相对时间减小,在钢液凝 15]The Japan Society for the Promotion of Science.Steelmaking Da- 固过程中达到目标尺寸的时间限制了BN的进一步长 ta Sourcebook.Montreux:Gordon and Breach Science Publish- 大.因此,冷速的增加导致凝固时间相对减小,BN的 cs,1988 尺寸也相应减小 06] Guo S R,Lu D Z,Fan H M.Role of B and C in a Ni-Fe-Cr Base Superalloy.Acta Metall Sin,1988,24(3):206 参考文献 (郭守仁,卢德忠,范鹤鸣.硼和碳在一种Ni-feCr基高温 [1]Brune T,Senk D,Walpot R.et al.Hot ductility behavior of bo- 合金中的作用.金属学报,1988,24(3):206) ron containing microalloyed steels with varying manganese con- [17]Fu J,Liu D L.Study on the precipitation behavior of TiN in the tents.Metall Mater Trans B,2015,46B(3)1400 microalloyed steels.Acta Metall Sin,2000,36(8):801 2]Cho K,Mun D J,Kang M,et al.Effect of thermal cycle and ni- (傅杰,柳得橹.微合金钢中TN的析出现律研究.金属学 trogen content on the hot ductility of boron-bearing steel.IS//Int, 报,2000,36(8):801) 2010.50(6):839 18] Khan M I,Mostafa A O,Aljarrah M,et al.Influence of cooling 3]Kim S K.Kim JS,Kim N J.Effect of boron on the hot ductility rate on microsegregation behavior of magnesium alloys.Mater of Nb-containing steel.Metall Mater Trans A,2002,33A (3): 2014,2014(7):1 701 19] Won YM,Thomas BG.Simple model of microsegregation during [4]Cho KC.Mun D J.Koo Y M,et al.Effect of niobium and titani- solidification of steels.Metall Mater Trans A,2001,32 (7): um addition on the hot ductility of boron containing steel.Mater 1755 Sci Eng A,2011,528(10/11):3556 D20]Ohnaka I.Mathematical analysis of solute redistribution during 5]Zarandi F.Yue S.Effect of boron on the hot ductility of the Nb- solidification with diffusion in solid phase.Trans /S//Int,1986, microalloyed steel in austenite region.Metall Mater Trans A, 26(12):1045 2006,37A(7):2316 21]Maugis P,Goune M.Kinetics of vanadium carbonitride precipi- [6] Mintz B.Crowther DN.Hot ductility of steels and its relationship tation in steel:a computer model.Acta Mater,2005,53 (12): to the problem of transverse cracking in continuous casting.Int 3359史成斌等: 低碳含硼钢中 BN 的析出行为 图 8 不同冷却速率钢中 BN 的尺寸分布 Fig. 8 Size distribution of BN in the steel with different cooling rates 凝固前沿粗大 BN 的生成有利于减少钢中细小的氮化 物,降低细小氮化物对晶界的钉扎作用. 3 结论 ( 1) 在钢液凝固过程中无微观偏析的条件下,试 验用钢的化学成分不满足 BN 在凝固前沿析出的热力 学条件; 在考虑钢液凝固前沿溶质元素微观偏析时,当 固相率 fs > 0. 981 时,BN 的生成满足热力学条件. ( 2) 在凝固前沿随着固相率的增加,B 和 N 均会 发生偏析. 其中,凝固前沿 B 的偏析更为显著. 当固 相率接近于 1 时,硼在剩余液相中的实际含量远高于 氮元素的含量,N 的扩散是 BN 长大的限制性环节. ( 3) 钢液的冷却速率对凝固前沿 B 和 N 元素的偏 析无显著影响,而对析出 BN 的尺寸有明显影响. 随着 冷速的增加,BN 长大所需的相对时间减小,在钢液凝 固过程中达到目标尺寸的时间限制了 BN 的进一步长 大. 因此,冷速的增加导致凝固时间相对减小,BN 的 尺寸也相应减小. 参 考 文 献 [1] Brune T,Senk D,Walpot R,et al. Hot ductility behavior of bo￾ron containing microalloyed steels with varying manganese con￾tents. Metall Mater Trans B,2015,46B( 3) : 1400 [2] Cho K,Mun D J,Kang M,et al. Effect of thermal cycle and ni￾trogen content on the hot ductility of boron-bearing steel. ISIJ Int, 2010,50( 6) : 839 [3] Kim S K,Kim J S,Kim N J. Effect of boron on the hot ductility of Nb-containing steel. Metall Mater Trans A,2002,33A( 3) : 701 [4] Cho K C,Mun D J,Koo Y M,et al. Effect of niobium and titani￾um addition on the hot ductility of boron containing steel. Mater Sci Eng A,2011,528( 10 /11) : 3556 [5] Zarandi F,Yue S. Effect of boron on the hot ductility of the Nb￾microalloyed steel in austenite region. Metall Mater Trans A, 2006,37A( 7) : 2316 [6] Mintz B,Crowther D N. Hot ductility of steels and its relationship to the problem of transverse cracking in continuous casting. Int Mater Rev,2010,55( 3) : 168 [7] Hannerz N E. Critical hot plasticity and transverse cracking in continuous slab casting with particular reference to composition. Trans ISIJ Int,1985,25( 2) : 149 [8] Zhao S T,Wu P,Guo A M,et al. Segregation of boron in the tem￾perature range oflower hot ductility of microalloy steels. T Mater Heat Treat,2010,31( 11) : 85 ( 赵守田,吴平,郭爱民,等. 微合金钢高温热塑性低谷区硼 的偏聚. 材料热处理学报,2010,31( 11) : 85) [9] Mao X P. Microalloying Technology on Thin Slab Casting and Di￾rect Rolling Process. Beijing: Metallurgical Industry Press,2008 ( 毛新平. 薄板坯连铸连轧微合金化技术. 北京: 冶金工业出 版社,2008) [10] Chown L H,Cornish L A. Investigation of hot ductility in Al￾killed boron steels. Mater Sci Eng A,2008,494( 1) : 263 [11] Jin G X,Du L X,Gao C R. Thermodynamic analysis of boron nitride formation in boron microalloyed steel. J Northeastern Univ Nat Sci,2014,36( 4) : 483 ( 金光秀,杜林秀,高彩茹. 含硼微合金钢中硼氮化物形成 的热力学分析. 东北大学学报: 自然科学版,2014,36( 4) : 483) [12] Yin S C,Hajime K,Mitsuru T. The precipitation behavior of bo￾ride during cooling. Acta Metall Sin,1982,18( 5) : 559 ( 尹士科,小松肇,谷野满. 冷却过程中硼化物的析出行为. 金属学报,1982,18( 5) : 559) [13] Chen J X. Common Charts and Data Book for Steelmaking. Bei￾jing: Metallurgical Industry Press,2010 ( 陈家祥. 炼钢常用图标数据手册. 北京: 冶金工业出版社, 2010) [14] Evans D B,Pehlke RD. Aluminum-nitrogen equilibrium in liq￾uid iron. Trans Metall Soc AIME,1964,230( 7) : 1651 [15] The Japan Society for the Promotion of Science. Steelmaking Da￾ta Sourcebook. Montreux: Gordon and Breach Science Publish￾ers,1988 [16] Guo S R,Lu D Z,Fan H M. Role of B and C in a Ni--Fe--Cr Base Superalloy. Acta Metall Sin,1988,24( 3) : 206 ( 郭守仁,卢德忠,范鹤鸣. 硼和碳在一种 Ni--Fe--Cr 基高温 合金中的作用. 金属学报,1988,24( 3) : 206) [17] Fu J,Liu D L. Study on the precipitation behavior of TiN in the microalloyed steels. Acta Metall Sin,2000,36( 8) : 801 ( 傅杰,柳得橹. 微合金钢中 TiN 的析出现律研究. 金属学 报,2000,36( 8) : 801) [18] Khan M I,Mostafa A O,Aljarrah M,et al. Influence of cooling rate on microsegregation behavior of magnesium alloys. J Mater, 2014,2014( 7) : 1 [19] Won Y M,Thomas BG. Simple model of microsegregation during solidification of steels. Metall Mater Trans A,2001,32 ( 7 ) : 1755 [20] Ohnaka I. Mathematical analysis of solute redistribution during solidification with diffusion in solid phase. Trans ISIJ Int,1986, 26( 12) : 1045 [21] Maugis P,Gouné M. Kinetics of vanadium carbonitride precipi￾tation in steel: a computer model. Acta Mater,2005,53( 12) : 3359 · 31 ·
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