钒微合金化非调质钢48MnVS的奥氏体动态再结晶行为
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摘要
实验用非调质钢48MnVS(/%:0.48C,0.60Si,1.50Mn,0.35Cr,0.14V,0.05S,0.020Al,0.015 0N)由100 t EAF冶炼,连铸成280 mm×360 mm坯,轧成中100 mm棒材。通过Gleeble-3800热模拟实验机研究了变形温度950~1 150℃,变形速率0.1~10 s~(-1),变形址60%的单道次压缩钒微合金非调质钢48MnVS的奥氏体再结晶过程得出真应力-应变曲线,计算得出实验钢的动态再结晶晶粒尺寸模型和动态再结晶状态图。结果表明,钒微合金化非调质钢48MnVS变形温度越高,变形速率越低,则发生动态再结晶的形变储能越小,越容易发生动态再结晶。实验钢48MnVS的动态再结晶激活能为Q_d=343.202 kJ/mol。
The tested non-quenched-tempered steel 48MnVS(/%:0.48 C,0.60 Si,1.50 Mn,0.35 Cr,0.14 V,0.05 S,0.020 Al,0.015 0N) is melted by an 100 t EAF,cast to 280 mm × 360 mm bloom and rolled to Φ100 mm bar products.The recrystallization process of austenile in vanadium microalloying non-quenched-tempered steel 48 MnVS singlepass compressed with deformation 60%and deformation rate 0.1 ~ 10 s~(-1) temperature at 950 ~ 1 150 ℃ is studied by using a Gleeble-3800 thermal simulation tests machine to gel true slress-true strain curves,and the dynamic recrystallizalion grain size model and the dynamic recrystallizalion slate diagram in tested sleel are obtained by calculation.Results show that with higher deformation temperature anl lower deformation rate,the stored energy of deformation for occurring dynamic recrystallizalion is lower therefore dynamic recrystallizalion of vanadium microalloying non-quenched-tempered steel 48 MnVS occurs more easily.The activation energy Q_d for dynamic recryslallizalion of tested steel 48 MnVS is 343.202 kJ/mol.
The tested non-quenched-tempered steel 48MnVS(/%:0.48 C,0.60 Si,1.50 Mn,0.35 Cr,0.14 V,0.05 S,0.020 Al,0.015 0N) is melted by an 100 t EAF,cast to 280 mm × 360 mm bloom and rolled to Φ100 mm bar products.The recrystallization process of austenile in vanadium microalloying non-quenched-tempered steel 48 MnVS singlepass compressed with deformation 60%and deformation rate 0.1 ~ 10 s~(-1) temperature at 950 ~ 1 150 ℃ is studied by using a Gleeble-3800 thermal simulation tests machine to gel true slress-true strain curves,and the dynamic recrystallizalion grain size model and the dynamic recrystallizalion slate diagram in tested sleel are obtained by calculation.Results show that with higher deformation temperature anl lower deformation rate,the stored energy of deformation for occurring dynamic recrystallizalion is lower therefore dynamic recrystallizalion of vanadium microalloying non-quenched-tempered steel 48 MnVS occurs more easily.The activation energy Q_d for dynamic recryslallizalion of tested steel 48 MnVS is 343.202 kJ/mol.
引文
[1]董成瑞,任海鹏,金同哲,等.微合金非调质钢[M].北京:冶金工业出版社,2000.
[2]陈明香,胡儒卓,李润洪,等.微合金钢的开发与研究[J].钢管,2002,31(4):14-16.
[3]吴晋彬,刘国权,王承阳,等.C、V含量对微合金钢变形奥氏体动态再结晶峰值应变的影响[J].热加工工艺,2010,39(18):47-49.
[4]谭利,詹肇麟,刘攀,等.微合金化非调质钢C38N2动态再结晶行为[J].特殊钢,2012,33(4):50-52.
[5]王进,陈军,赵震,等.F40MnV非调质钢的热变形行为[J].钢铁研究学报,2007,19(5):68-71.
[6]#12
[7]Sellar C M,Davies G J.Hot Working and Forming Processes[J].Metals Society,1979,22:1545-1548.
[8]White F E,Rossard C.Deformation Under Hot Working Condition[J].Iron Steel International,1968,14;14-20.
[9]刘攀,魏元生,惠卫军,等.研究非调质钢38MnVS锻造过程中奥氏体再结晶现象[C].2011年全国高品质特殊钢生产技术研讨会文集,西宁:2011.08.
[10]何宜柱,陈大宏,雷廷权.变形z因子与动态再结晶晶粒尺寸间的理论模型[J].钢铁研究学报,2000,12(1):26-30.
[11]方剑,邹喜洋,谢凯意.40Mn2V非调质钢热变形再结晶的研究[J].特殊钢,2009,30(5):65-67.
[12]Sellar C M,Whiteman J A.Recrystallization and Grain Growth in Hot Rolling[J].Materials Science and Technology,1979,13(3-4):187-194.
[13]Yue C X,Zhang L W,Liao S L,et al.Research on the Dynamic Recrystallization Behavior of GCrl5 Steel[J].Materials Science and Engineering A,2007,449(1/2):177-181.
[14]Femandez A I,Uranga P,Lopez B,et al.Dynamic Recrystallization Behavior Covering a Wide Austenite Grain Size Range in Nb and Nb-Ti Microalloyed Steels[J].Materials Science and Engineering A,2003,361(1/2):367-376.
[2]陈明香,胡儒卓,李润洪,等.微合金钢的开发与研究[J].钢管,2002,31(4):14-16.
[3]吴晋彬,刘国权,王承阳,等.C、V含量对微合金钢变形奥氏体动态再结晶峰值应变的影响[J].热加工工艺,2010,39(18):47-49.
[4]谭利,詹肇麟,刘攀,等.微合金化非调质钢C38N2动态再结晶行为[J].特殊钢,2012,33(4):50-52.
[5]王进,陈军,赵震,等.F40MnV非调质钢的热变形行为[J].钢铁研究学报,2007,19(5):68-71.
[6]#12
[7]Sellar C M,Davies G J.Hot Working and Forming Processes[J].Metals Society,1979,22:1545-1548.
[8]White F E,Rossard C.Deformation Under Hot Working Condition[J].Iron Steel International,1968,14;14-20.
[9]刘攀,魏元生,惠卫军,等.研究非调质钢38MnVS锻造过程中奥氏体再结晶现象[C].2011年全国高品质特殊钢生产技术研讨会文集,西宁:2011.08.
[10]何宜柱,陈大宏,雷廷权.变形z因子与动态再结晶晶粒尺寸间的理论模型[J].钢铁研究学报,2000,12(1):26-30.
[11]方剑,邹喜洋,谢凯意.40Mn2V非调质钢热变形再结晶的研究[J].特殊钢,2009,30(5):65-67.
[12]Sellar C M,Whiteman J A.Recrystallization and Grain Growth in Hot Rolling[J].Materials Science and Technology,1979,13(3-4):187-194.
[13]Yue C X,Zhang L W,Liao S L,et al.Research on the Dynamic Recrystallization Behavior of GCrl5 Steel[J].Materials Science and Engineering A,2007,449(1/2):177-181.
[14]Femandez A I,Uranga P,Lopez B,et al.Dynamic Recrystallization Behavior Covering a Wide Austenite Grain Size Range in Nb and Nb-Ti Microalloyed Steels[J].Materials Science and Engineering A,2003,361(1/2):367-376.