Nb、V对热冲压成型钢组织和性能的影响
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摘要
利用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)等研究了Nb、V等微合金元素对1 500 MPa级热冲压成型钢显微组织和力学性能的影响。结果表明:Nb、V微合金可以有效提高连退钢带中的马氏体、贝氏体体积分数,增加重新加热时界面形核位置,提高界面形核率,进而对试验钢的淬火—回火显微组织起到细化作用。Nb或V微合金处理后,钢中马氏体板条束尺寸和板条片间距显著降低。虽然Nb、V的添加均能提高钢的力学性能,但是与含V钢相比,含Nb钢的回火稳定性较差。
The influence of micro alloy niobium(Nb) and vanadium(V) on microstructure and mechanical properties in hot-forming steel was investigated by optical microscope(OM),scanning electron microscope(SEM) and transmission electron microscope(TEM).The results show that the volume fraction of martensite or bainite in continuous annealing strip increased with the microalloying addition,which would promote the recrystallization nucleation ratio during the reaustenitizing process.therefore,the microstructure would be refined effectively duringthe subsequent heat treatment process.The sizes of martensitic packets and lath lamellar spacing reduce simultaneously with micro-alloying addition for the tested steel.Though both Nb and V addition improve the mechanical properties,the Nb-bearing steel shows poor tempering stability compared with the V-bearing steel.
The influence of micro alloy niobium(Nb) and vanadium(V) on microstructure and mechanical properties in hot-forming steel was investigated by optical microscope(OM),scanning electron microscope(SEM) and transmission electron microscope(TEM).The results show that the volume fraction of martensite or bainite in continuous annealing strip increased with the microalloying addition,which would promote the recrystallization nucleation ratio during the reaustenitizing process.therefore,the microstructure would be refined effectively duringthe subsequent heat treatment process.The sizes of martensitic packets and lath lamellar spacing reduce simultaneously with micro-alloying addition for the tested steel.Though both Nb and V addition improve the mechanical properties,the Nb-bearing steel shows poor tempering stability compared with the V-bearing steel.
引文
[1]Song Leifeng,Ma Mingtu,Zhang Yisheng,et al.New boron steel development and process research of hot stamping[J].Engineering Sciences,2014,16(1):71-75.(宋磊峰,马鸣图,张宜生,等.热冲压成形新型B钢开发与工艺研究[J].中国工程科学,2014,16(1):71-75.)
[2]Maeno T,Mori K,Nagai T.Improvement in formability by control of temperature in hot stamping of ultra-high strength steel parts[J].CIRP Annals,2014,63(1):301-304.
[3]Li N,Lin J,Balint D S,et al.Experimental characterisation of the effects of thermal conditions on austenite formation for hot stamping of boron steel[J].Journal of Materials Processing Technology,2016,231:254-264.
[4]Venturato G,Novella M,Bruschi S,et al.Effects of phase transformation in hot stamping of 22MnB5 high strength steel[J].Procedia Engineering,2017,183:316-321.
[5]He Xinlai,Chu Youyi,Ke Jun.The hardenability of boron steel and the segregation of boron[J].ACTA Metallurgica Sinica,1983,19(6):459-465.(贺信莱,褚幼义,柯俊.硼钢淬透性与硼向奥氏体晶界的偏聚[J].金属学报,1983,19(6):459-465.)
[6]Nikravesh M,Naderi M,Akbari G H,et al.Phase transformations in a simulated hot stamping process of the boron bearing steel[J].Materials&Design,2015,84:18-24.
[7]Li Huiping,Hou Hongli,Zhou Weilu,et al.Phase transformation and blanking accuracy of boron steel B1500HS during hot blanking[J].Chinese Journal of Engineering,2017,39(12):1851-1858.(李辉平,侯弘历,周卫鲁,等.B1500HS硼钢热冲裁过程的相变和冲裁精度[J].工程科学学报,2017,39(12):1851-1858.)
[8]Zhao K,Chang Y,Hu P,et al.Influence of rapid cooling pretreatment on microstructure and mechanical property of hot stamped AHSS part[J].Journal of Materials Processing Technology,2016,228:68-75.
[9]Wang Hua,Yang Honglin,He Yanlin,et al.Effect of annealing process on the performance and microstructure of 22MnB5 steel[J].Shanghai Metals,2015,37(6):15-20.(王华,杨洪林,何燕霖,等.连退工艺对22Mn B5钢性能的影响规律及显微组织分析[J].上海金属,2015,37(6):15-20.)
[10]Li N,Lin J,Balint D S,et al.Modelling of austenite formation during heating in boron steel hot stamping processes[J].Journal of Materials Processing Technology,2016,237:394-401.
[11]Jiang Haitao,Tang Di,Mi Zhenli,et al.Influence of processing parameters of hot stamping to mechanical properties of martensite steel and segregation of boron[J].Journal of Materials Engineering,2010(2):69-73.(江海涛,唐荻,米振莉,等.工艺参数对热冲压成型钢组织性能及硼偏聚的影响[J].材料工程,2010(2):69-73.)
[12]Li Yongliang,Wang Fuming,Li Changrong,et al.Influence of vanadium on the microstructure refinement of high strength automobile beam steel[J].Chinese Journal of Engineering,2016,38(8):1108-1114.(李永亮,王福明,李长荣,等.钒对高强度汽车大梁钢组织细化的影响[J].工程科学学报,2016,38(8):1108-1114.)
[13]Deng Tianyong,Xu Yunbo,Yuan Xiangqian,et al.Prediction of Ar3for Nb-containing low carbon steels[J].Acta Metallurgica Sinica,2007,43(10):1091-1095.(邓天勇,许云波,袁向前,等.含Nb低碳钢相变温度Ar3预测模型[J].金属学报,2007,43(10):1091-1095.)
[14]Song Weixi.Metallography[M].Beijing:Metallurgical Industry Press,2008:200-205.(宋维锡.金属学[M].第2版.北京:冶金工业出版社,2008:200-205.)
[15]Yaxu Z,Fuming W,Changrong L,et al.Microstructural evolution,coarsening behavior of precipitates and mechanical properties of boron bearing steel 25CrMoNbB during tempering[J].Materials Science and Engineering:A,2018,712:453-465.
[16]Li Zhichao,Liu Pengjian,Wang Minggang.Computation of Ms temperature in carbon equivalence method[J].Journal of Liaoning Technical University(Natural Science),1998,17(3):293-295(李智超,刘鹏砚,王明罡.Ms点的碳当量计算法[J].辽宁工程技术大学学报(自然科学版),1998,17(3):293-295.)
[17]Ding Hongli,Wang Limin,Zhang Xiuli.Effects of termpering and aging on microstructure and properties of martensitic heat-resistant steel 1Cr12Ni2WMoVNbN[J].Hot Working Technology,2010,39(14):166-170.(丁宏莉,王立民,张秀丽.回火和时效对1Crl2Ni2WMoVNbN马氏体热强钢组织与性能的影响[J].热加工工艺,2010,39(14):166-170.)
[2]Maeno T,Mori K,Nagai T.Improvement in formability by control of temperature in hot stamping of ultra-high strength steel parts[J].CIRP Annals,2014,63(1):301-304.
[3]Li N,Lin J,Balint D S,et al.Experimental characterisation of the effects of thermal conditions on austenite formation for hot stamping of boron steel[J].Journal of Materials Processing Technology,2016,231:254-264.
[4]Venturato G,Novella M,Bruschi S,et al.Effects of phase transformation in hot stamping of 22MnB5 high strength steel[J].Procedia Engineering,2017,183:316-321.
[5]He Xinlai,Chu Youyi,Ke Jun.The hardenability of boron steel and the segregation of boron[J].ACTA Metallurgica Sinica,1983,19(6):459-465.(贺信莱,褚幼义,柯俊.硼钢淬透性与硼向奥氏体晶界的偏聚[J].金属学报,1983,19(6):459-465.)
[6]Nikravesh M,Naderi M,Akbari G H,et al.Phase transformations in a simulated hot stamping process of the boron bearing steel[J].Materials&Design,2015,84:18-24.
[7]Li Huiping,Hou Hongli,Zhou Weilu,et al.Phase transformation and blanking accuracy of boron steel B1500HS during hot blanking[J].Chinese Journal of Engineering,2017,39(12):1851-1858.(李辉平,侯弘历,周卫鲁,等.B1500HS硼钢热冲裁过程的相变和冲裁精度[J].工程科学学报,2017,39(12):1851-1858.)
[8]Zhao K,Chang Y,Hu P,et al.Influence of rapid cooling pretreatment on microstructure and mechanical property of hot stamped AHSS part[J].Journal of Materials Processing Technology,2016,228:68-75.
[9]Wang Hua,Yang Honglin,He Yanlin,et al.Effect of annealing process on the performance and microstructure of 22MnB5 steel[J].Shanghai Metals,2015,37(6):15-20.(王华,杨洪林,何燕霖,等.连退工艺对22Mn B5钢性能的影响规律及显微组织分析[J].上海金属,2015,37(6):15-20.)
[10]Li N,Lin J,Balint D S,et al.Modelling of austenite formation during heating in boron steel hot stamping processes[J].Journal of Materials Processing Technology,2016,237:394-401.
[11]Jiang Haitao,Tang Di,Mi Zhenli,et al.Influence of processing parameters of hot stamping to mechanical properties of martensite steel and segregation of boron[J].Journal of Materials Engineering,2010(2):69-73.(江海涛,唐荻,米振莉,等.工艺参数对热冲压成型钢组织性能及硼偏聚的影响[J].材料工程,2010(2):69-73.)
[12]Li Yongliang,Wang Fuming,Li Changrong,et al.Influence of vanadium on the microstructure refinement of high strength automobile beam steel[J].Chinese Journal of Engineering,2016,38(8):1108-1114.(李永亮,王福明,李长荣,等.钒对高强度汽车大梁钢组织细化的影响[J].工程科学学报,2016,38(8):1108-1114.)
[13]Deng Tianyong,Xu Yunbo,Yuan Xiangqian,et al.Prediction of Ar3for Nb-containing low carbon steels[J].Acta Metallurgica Sinica,2007,43(10):1091-1095.(邓天勇,许云波,袁向前,等.含Nb低碳钢相变温度Ar3预测模型[J].金属学报,2007,43(10):1091-1095.)
[14]Song Weixi.Metallography[M].Beijing:Metallurgical Industry Press,2008:200-205.(宋维锡.金属学[M].第2版.北京:冶金工业出版社,2008:200-205.)
[15]Yaxu Z,Fuming W,Changrong L,et al.Microstructural evolution,coarsening behavior of precipitates and mechanical properties of boron bearing steel 25CrMoNbB during tempering[J].Materials Science and Engineering:A,2018,712:453-465.
[16]Li Zhichao,Liu Pengjian,Wang Minggang.Computation of Ms temperature in carbon equivalence method[J].Journal of Liaoning Technical University(Natural Science),1998,17(3):293-295(李智超,刘鹏砚,王明罡.Ms点的碳当量计算法[J].辽宁工程技术大学学报(自然科学版),1998,17(3):293-295.)
[17]Ding Hongli,Wang Limin,Zhang Xiuli.Effects of termpering and aging on microstructure and properties of martensitic heat-resistant steel 1Cr12Ni2WMoVNbN[J].Hot Working Technology,2010,39(14):166-170.(丁宏莉,王立民,张秀丽.回火和时效对1Crl2Ni2WMoVNbN马氏体热强钢组织与性能的影响[J].热加工工艺,2010,39(14):166-170.)