Nb对Fe-3%Si取向硅钢动态回复行为的影响
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摘要
通过Gleeble-3500热模拟试验机,测定了2种含铌和不含铌取向硅钢在变形温度为1100、1000、900℃,变形速率为0. 5、2 s~(-1)的真应力-真应变曲线。通过线性回归分析,计算出了两种试验钢的变形激活能Q分别为271、232 kJ/mol,构建了高温变形条件下的流变应力本构方程。综合真应力-真应变曲线以及流变应力本构方程,分析了Nb元素对取向硅钢动态回复的影响,结果表明,Nb溶质原子和Nb的碳氮化物共同作用,有效延缓了Fe-3%Si钢的动态回复行为。
The true stress-strain curves of two kinds of oriented silicon steels with and without Nb under hot compression deformation,in the temperature range of 900-1100 ℃ and strain rates of 0. 5 s~(-1) and 2 s~(-1),were investigated by cylindrical compression tests on a Gleeble-3500 machine. The hot deformation activation energy Q of the two tested steels were evaluated by linear regression analysis,and found to be 271 and 232 kJ/mol,respectively; and the flow stress constitutive equations of the oriented silicon steels during hot compression were obtained.By comprehensive considering of the true stress-strain curves and flow stress constitutive equations,the effect of Nb on dynamic recovery behavior of the oriented silicon steel was analyzed. The results show that both the Nb in solid solution and the Nb carbonitrides can slow down the dynamic recovery behavior of Fe-3%Si oriented silicon steel effectively.
The true stress-strain curves of two kinds of oriented silicon steels with and without Nb under hot compression deformation,in the temperature range of 900-1100 ℃ and strain rates of 0. 5 s~(-1) and 2 s~(-1),were investigated by cylindrical compression tests on a Gleeble-3500 machine. The hot deformation activation energy Q of the two tested steels were evaluated by linear regression analysis,and found to be 271 and 232 kJ/mol,respectively; and the flow stress constitutive equations of the oriented silicon steels during hot compression were obtained.By comprehensive considering of the true stress-strain curves and flow stress constitutive equations,the effect of Nb on dynamic recovery behavior of the oriented silicon steel was analyzed. The results show that both the Nb in solid solution and the Nb carbonitrides can slow down the dynamic recovery behavior of Fe-3%Si oriented silicon steel effectively.
引文
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[2]李洋,冯运莉,王凯琳,等.含铌低温取向硅钢热轧板及常化板的织构演变[J].金属热处理,2018,43(5):6-10.Li Yang,Feng Yunli,Wang Kailin,et al.Textures evolution of hot rolled plate and normalized plate of Nb-containing low temperature grain-oriented silicon steel[J].Heat Treatment of Metals,2018,43(5):6-10.
[3]王玥瑶,李杰,冯运莉,等.热轧工艺对含铌取向硅钢一次冷轧织构的影响[J].金属热处理,2017,42(11):39-44.Wang Yueyao,Li Jie,Feng Yunli,et al.Effect of hot rolling process on texture of Nb-contained grain-oriented silicon steel after single cold rolling[J].Heat Treatment of Metals,2017,42(11):39-44.
[4]余伟,李保成,黄文辉.变形温度对7A04-T5铝合金组织与性能影响[J].热加工工艺,2011(2):51-53.Yu Wei,Li Baocheng,Huang Wenhui.Effect of deformation temperature on microstructure and properties of 7A04-T5 Al alloy[J].Hot Working Technology,2011(2):51-53.
[5]赵昆.IF钢铁素体区热变形行为研究和铁素体轧制工艺开发[D].沈阳:东北大学,1999.
[6]李曼云,孙本荣.钢的控制轧制和控制冷却技术手册[M].北京:冶金工业出版社,2009.
[7]刘文昌,郑炀曾.45V钢热变形条件下的动态回复行为[J].金属热处理学报,1993(3):28-32.Liu Wenchang,Zheng Yangzeng.Dynamic recovery behavior under hot working condition for 45V steel[J].Transaction of Metal Heat Treatment,1993(3):28-32.
[8]Jonas J J,Sellars C M,Tegart W J M G.Strength and structure under hot-working conditions[J].Metallurgical Reviews,1969,14(1):1-24.
[9]Shi H,Mc Laren A J,Sellars C M,et al.Constitutive equations for high temperature flow stress of aluminium alloys[J].Materials Science and Technology,1997,13(3):210-216.
[10]Whittaker H J.Hot working and recrystallisation of 3%silicon steel[D].Sheffield:University of Sheffield,1973.
[11]Zaidi M A,Sheppard T.Development of microstructure throughout roll gap during rolling of aluminium alloys[J].Metal Science,1982,16(5):229-238.
[12]鲍思前,赵刚,余驰斌,等.含Nb微合金钢动态再结晶行为研究[J].武汉科技大学学报(自然科学版),2008(5):543-546.Bao Siqian,Zhao Gang,Yu Chibin,et al.Dynamic recrystallization behavior of a Nb-microalloyed steel[J].Journal of Wuhan University of Science and Technology(Natural Science Edition),2008(5):543-546.
[13]何忠治.电工钢[M].北京:冶金工业出版社,2012.
[14]雍岐龙.钢铁材料中的第二相[M].北京:冶金工业出版社,2006.
[15]付立铭,单爱党,王巍.低碳Nb微合金钢中Nb溶质拖曳和析出相NbC钉扎对再结晶晶粒长大的影响[J].金属学报,2010(7):832-837.Fu Liming,Shan Aidang,Wang Wei.Effect of Nb solute drag and NbC precipitate pinning on the recrystallization grain growth in low carbon Nb-microalloyed steel[J].Acta Metallurgica Sinica,2010(7):832-837.
[16]聂文金,尚成嘉,吴圣杰,等.Nb对奥氏体热变形后等温回复的影响[J].金属学报,2012,48(7):775-781.Nie Wenjin,Shang Chengjia,Wu Shengjie,et al.Effects of Nb on recovery of hot-deformed austenite[J].Acta Metallurgica Sinica,2012,48(7):775-781.