含铌取向硅钢第二相沉淀析出相变动力学计算
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摘要
采用第二相相关元素在基体中的过饱和度,即偏离平衡固溶度的程度计算相变自由能,根据计算出的驱动力进一步计算第二相析出的临界形核功和临界形核尺寸。分析了含铌取向硅钢中不同铌含量(0. 090%和0. 044%)对奥氏体中Nb(C,N)析出驱动力、临界形核功和临界形核尺寸的影响。计算结果表明:含铌取向硅钢中Nb(C,N)的析出驱动力随温度的降低而单调增大,且随铌含量增加而增大,临界形核功和临界形核尺寸均随温度的提高而变大,随铌含量增加而减小,但幅度不大。
Phase transformation free energy and driving force were calculated based on supersaturation of the elements associated with secondary phase in the matrix or the degree of deviation from the equilibrium solubility,and the critical nucleation energy and critical nucleus size of Nb( C,N) were calculated according to the precipitation driving force. Then the effect of niobium content( 0. 090% and 0. 044%) to the precipitation driving force,the critical nucleation energy and critical nucleus size of Nb( C,N) in austenite for Nb-bearing oriented silicon steels was analyzed. The results show that the precipitation driving force of Nb( C,N) phase increases monotonically with temperature decreasing,and increases with the niobium content increasing. The critical nucleation energy and critical nucleus size of Nb( C,N)increases with temperature increasing. When increasing the niobium content,the critical nucleation energy and critical nucleus size decrease,but the magnitude is slight.
Phase transformation free energy and driving force were calculated based on supersaturation of the elements associated with secondary phase in the matrix or the degree of deviation from the equilibrium solubility,and the critical nucleation energy and critical nucleus size of Nb( C,N) were calculated according to the precipitation driving force. Then the effect of niobium content( 0. 090% and 0. 044%) to the precipitation driving force,the critical nucleation energy and critical nucleus size of Nb( C,N) in austenite for Nb-bearing oriented silicon steels was analyzed. The results show that the precipitation driving force of Nb( C,N) phase increases monotonically with temperature decreasing,and increases with the niobium content increasing. The critical nucleation energy and critical nucleus size of Nb( C,N)increases with temperature increasing. When increasing the niobium content,the critical nucleation energy and critical nucleus size decrease,but the magnitude is slight.
引文
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[11]Miedema A R. Cohesion in alloys-fundamentals of semi-empirical model[J]. Physica,1980,100(8):1-28.
[12]张志正,王春旭,黄顺喆,等. Nb微合金化9310钢中碳化物析出规律研究[J].热加工工艺,2014,43(4):104-107.Zhang Zhizheng,Wang Chunxu,Huang Shunzhe,et al. Research on carbide precipitation in Nb-microallyed 9310 steel[J]. Hot Working Technology,2014,43(4):104-107.
[2]方芳,雍岐龙,杨才福,等. V(C,N)在V-N微合金钢铁素体中的析出动力学[J].金属学报,2009,45(5):625-629.Fang Fang,Yong Qilong,Yang Caifu,et al. Precipitating kinetics of V(C,N)in ferrite of V-N microalloying steel[J]. Acta Metallurgica Sinica,2009,45(5):625-629.
[3]雍岐龙.钢铁材料中的第二相[M].北京:冶金工业出版设,2006.
[4]许云波,于永梅,吴迪,等. Nb微合金钢析出行为的热力学计算[J].材料研究学报,2006,20(1):104-107.Xu Yunbo,Yu Yongmei,Wu Di,et al. Thermodynamic caleulations of Preci Pitation behvaior in Nb mieroalloyed steels[J]. Chinese Journal of Materials Reasearch,2006,20(1):104-107.
[5]王若平,黎世德,方泽民,等.低温热轧高磁感取向硅钢板常化组织及析出相研究[J].金属热处理,2009,34(6):9-14.Wang Ruoping,Li Shide, Fang Zemin, et al. Microstructure and Precipitate of low temperature hot rolled HGO silicon steel plate by normalizing[J]. Heat Treatment of Metals,2009,34(6):9-14.
[6]孙学义,宋红梅,林勤,等.含铌高强结构钢应变诱导沉淀相析出动力学[J].中国稀土学报,2004,22(22):177-179.Sun Xueyi,Song Hongmei,Lin Qin,et al. Kinetics of strain induced precipitation of niobium carbonitrides in austenite of nb steels[J].Journal of the Chinese Rare Earth Society,2004,22(22):177-179.
[7]Feng Yunli,Guo Jing,Li Jie,et al. Effect of Nb on solution and precipitation of inhibitors in grain-oriented silicon steel[J]. Journal of Magnetism and Magnetic Materials,2017,426:89-94.
[8]李杰,王凯琳,宁江利,等.热轧工艺对含铌取向硅钢二次冷轧中织构的影响[J].金属热处理,2018,43(2):137-143.Li Jie,Wang Kailin,Ning Jingli,et al. Effect of hot rolling process on texture of Nb-contained grain-oriented silicon steel after double cold rolling[J]. Heat Treatment of Metals,2018,43(2):137-143.
[9]李建军,岳尔斌,项利,等.高磁感取向硅钢(Hi-B)中抑制剂的固溶析出行为[J].金属功能材料,2009,16(5):55-58.Li Jianjun,Yue Erbin,Xiang Li,et al. Behaviors of precipitation and solution of AlN inhibitor in high magnetic induction grain-oriented silicon steel[J]. Metallic Functional Materials,2009,16(5):55-58.
[10]颜建新,樊立峰,仇圣桃,等.低温高磁感取向硅钢常化工艺中间冷却制度的研究[J].热加工工艺,2014,43(11):26-29.Yan Jianxin, Fan Lifeng, Qiu Shengtao, et al. Research on intermediate cooling system of low temperature and high induction oriented silicon steel in normalizing process[J]. Hot Working Technology,2014,43(11):26-29.
[11]Miedema A R. Cohesion in alloys-fundamentals of semi-empirical model[J]. Physica,1980,100(8):1-28.
[12]张志正,王春旭,黄顺喆,等. Nb微合金化9310钢中碳化物析出规律研究[J].热加工工艺,2014,43(4):104-107.Zhang Zhizheng,Wang Chunxu,Huang Shunzhe,et al. Research on carbide precipitation in Nb-microallyed 9310 steel[J]. Hot Working Technology,2014,43(4):104-107.