高温渗氮Hi-B钢二次再结晶中组织及织构演变
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摘要
模拟CSP工艺试制Hi-B钢在二次再结晶过程中不同退火温度下的组织和织构。使用Zeiss Axioplan金相显微镜(OM)观察试样组织,借助于NOVA400Nano SEM型场发射扫描电子显微镜进行微观织构EBSD检测分析。结果表明:Goss晶粒在1 040℃发生异常长大,异常长大之前晶粒细小均匀,有利的{111}〈112〉和{411}〈148〉织构为主要织构,异常长大后部分晶粒发生快速长大,组织则以Goss织构为主。Goss织构及{111}〈112〉和{411}〈148〉织构的取向差分布主要集中在20°~45°之间,高能晶界理论(HE)能够解释Goss晶粒的异常长大。基体的CSL晶界比例较低,且移动性差的∑3晶界比例较高,移动性好的∑5、∑7、∑9晶界比例较低,CSL晶界理论对于Goss晶粒的异常长大则不具有说服力。
Effects of different annealing temperatures on the microstructure and texture during the secondary recrystallization of Hi-B steel manufactured by simulating CSP process were studied by Zeiss Axioplan optical microscope(OM),NOVA400 Nano field emission scanning electron microscope(SEM)and electron back-scattered diffraction(EBSD).The results show that Goss grains grow abnormally at 1 040℃,and the grains are fine and uniform before abnormal growth.The{111}〈112〉and{411}〈148〉textures are the main textures.A small number of grains grow rapidly after abnormal growth,and the Goss texture is the main texture.The distributions of misorientation angle of Goss,{111}〈112〉and{411}〈148〉orientation are mainly between 20°-45°,the high energy boundary theory(HE)can explain the abnormal growth of the Goss grain.The CSL grain boundary ratio of the matrix is relatively low,the proportion of the∑3 grain boundaries with poor mobility is high,the proportion of the∑5,∑7,∑9 grain boundaries is low,and CSL grain boundary theory is not persuasive for abnormal growth of Goss grains.
Effects of different annealing temperatures on the microstructure and texture during the secondary recrystallization of Hi-B steel manufactured by simulating CSP process were studied by Zeiss Axioplan optical microscope(OM),NOVA400 Nano field emission scanning electron microscope(SEM)and electron back-scattered diffraction(EBSD).The results show that Goss grains grow abnormally at 1 040℃,and the grains are fine and uniform before abnormal growth.The{111}〈112〉and{411}〈148〉textures are the main textures.A small number of grains grow rapidly after abnormal growth,and the Goss texture is the main texture.The distributions of misorientation angle of Goss,{111}〈112〉and{411}〈148〉orientation are mainly between 20°-45°,the high energy boundary theory(HE)can explain the abnormal growth of the Goss grain.The CSL grain boundary ratio of the matrix is relatively low,the proportion of the∑3 grain boundaries with poor mobility is high,the proportion of the∑5,∑7,∑9 grain boundaries is low,and CSL grain boundary theory is not persuasive for abnormal growth of Goss grains.
引文
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[11]Hayakawa Y,Szpunar J A,Palumbo G,et al.The role of grain boundary character distribution in Goss texture development in electrical steels[J].Journal of Magnetism and Magnetic Materials,1996,160(4):143.
[12]Watanabe T.Grain boundary character distribution(GBCD)analysis of grain growth-related phenomena in polycrystalline materials[J].Materials Science Forum,1992,94-96:209.
[13]Harase J,Shimizu R,Kim J K,et al.The role of high energy boundaries and coincidence boundaries in the secondary recrystallization of grain-oriented silicon steel[J].Metals and Materials International,1999,5(5):429.
[14]Shimizu R,Harase J.Coincidence grain boundary and texture evolution in Fe-3%Si[J].Acta Metallurgica,1989,37(4):1241.
[15]Lin P,Palumbo G,Harase J,et al.Coincidence Site Lattice(CSL)grain boundaries and Goss texture development in Fe-3%Si alloy[J].Acta Materialia,1996,44(12):4677.
[16]Rouag N,Vigna G,Penelle R.Evolution of local texture and grain boundary characteristics during secondary recrystallisation of Fe-3%Si sheets[J].Acta Metallurgica Et Materialia,1990,38(6):1101.
[2]吴忠旺,李军,赵宇,等.后天抑制剂获得法制取向硅钢析出物的转化规律[J].钢铁研究学报,2011,23(12):45.(Wu Z W,Li J,Zhao Y,et al.Rules of precipitate transformation for grain-oriented silicon steels produced by acquire inhibitor method[J].Journal of Iron and Steel Research,2011,23(12):45.)
[3]Meng Q Y,Hao Q,Ping Y,et al.Analysis of micro-texture during secondary recrystallization in a Hi-B electrical steel[J].Journal of Materials Science and Technology,2011,27(11):1065.
[4]Rajmohan N,Szpunar J A.An analytical method for characterizing grain boundaries around growing Goss grains during secondary recrystallization[J].Scripta Materialia,2001,44(10):2387.
[5]Hayakawa Y,Szpunar J A.The role of grain boundary character distribution in secondary recrystallization of electrical steels[J].Acta Materialia,1997,45(3):1285.
[6]Hayakawa Y,Szpunar J A,Palumbo G,et al.The role of grain boundary character distribution in Goss texture development in electrical steels[J].Journal of Magnetism and Magnetic Materials,1996,160(4):143.
[7]Etter A L,Baudin T,Penelle R.Influence of the Goss grain neighbourhood during secondary recrystallization of Fe-3%Si sheets[J].Materials Science Forum,2002,408-412:1251.
[8]龚坚,李军,黎先浩,等.后期渗氮工艺制备取向硅钢的组织转变[J].钢铁研究学报,2016,28(8):69.(Gong J,Li J,Li X H,et al.Microstructure evolution in grain-oriented silicon steels produced by nitriding technique[J].Journal of Iron and Steel Research,2016,28(8):69.)
[9]Blackman M,Fowler R H.Abbreviations-recrystallization and related annealing phenomena[J].American Journal of the Medical Sciences,1909,138(2):1.
[10]Fernando P A,Lesley P R,Rangel R P.Annealing of coldworked austenitic stainless steels[J].ISIJ International,2003,43(2):135.
[11]Hayakawa Y,Szpunar J A,Palumbo G,et al.The role of grain boundary character distribution in Goss texture development in electrical steels[J].Journal of Magnetism and Magnetic Materials,1996,160(4):143.
[12]Watanabe T.Grain boundary character distribution(GBCD)analysis of grain growth-related phenomena in polycrystalline materials[J].Materials Science Forum,1992,94-96:209.
[13]Harase J,Shimizu R,Kim J K,et al.The role of high energy boundaries and coincidence boundaries in the secondary recrystallization of grain-oriented silicon steel[J].Metals and Materials International,1999,5(5):429.
[14]Shimizu R,Harase J.Coincidence grain boundary and texture evolution in Fe-3%Si[J].Acta Metallurgica,1989,37(4):1241.
[15]Lin P,Palumbo G,Harase J,et al.Coincidence Site Lattice(CSL)grain boundaries and Goss texture development in Fe-3%Si alloy[J].Acta Materialia,1996,44(12):4677.
[16]Rouag N,Vigna G,Penelle R.Evolution of local texture and grain boundary characteristics during secondary recrystallisation of Fe-3%Si sheets[J].Acta Metallurgica Et Materialia,1990,38(6):1101.