低温取向硅钢的渗氮工艺
|
摘要
基于实验室条件下模拟CSP工艺低温生产取向硅钢,通过辉光光谱分析和TEM分析,对低温取向硅钢渗氮工艺进行研究。结果表明,随着渗氮时间的延长、渗氮温度的上升或渗氮气氛中NH_3浓度的增加,试样中的氮含量均随之增加。基于辉光光谱对试样中元素的分布分析,发现渗氮后试样中氮含量有所增加,氮进入试样中首先在表面聚集达到一定浓度后,再向内部扩散,其含量随渗氮距离的增加逐渐趋于平稳。900℃渗氮后,由于渗入的N跟Al形成AlN析出相并且相互合并聚拢,因此渗氮后较渗氮前析出相的数量变多,同时出现析出相团聚现象。
Based on the simulation of CSP process of low-temperature manufactured grain-oriented silicon steel,the nitriding process of the tested steel is researched under experimental condition through glow spectrum analysis and TEM analysis. The results show that with the increase of the nitriding time,temperature or NH_3 concentration in nitriding atmosphere,the content of nitrogen in the nitrided specimen is increased. Analyzing the distribution of elements in steel by glow spectrum,the content of nitrogen atoms in steel increases after nitriding and nitrogen atoms aggregate on the surface of steel to reach the critical concentration,then diffuse into interior area and its content tends to be stable with the increase of nitriding distance. The nitrogen atoms combine with aluminum atoms,grow as precipitated phase AlN and then the AlN phases merge and converge after 900 ℃ nitriding,therefore,more precipitated phase forms and becomes more aggregated.
Based on the simulation of CSP process of low-temperature manufactured grain-oriented silicon steel,the nitriding process of the tested steel is researched under experimental condition through glow spectrum analysis and TEM analysis. The results show that with the increase of the nitriding time,temperature or NH_3 concentration in nitriding atmosphere,the content of nitrogen in the nitrided specimen is increased. Analyzing the distribution of elements in steel by glow spectrum,the content of nitrogen atoms in steel increases after nitriding and nitrogen atoms aggregate on the surface of steel to reach the critical concentration,then diffuse into interior area and its content tends to be stable with the increase of nitriding distance. The nitrogen atoms combine with aluminum atoms,grow as precipitated phase AlN and then the AlN phases merge and converge after 900 ℃ nitriding,therefore,more precipitated phase forms and becomes more aggregated.
引文
[1]王若平,刘静,毛炯辉,等.渗氮方式及氨气对取向硅钢氮含量的影响[J].金属热处理,2009,34(10):69-71.Wang Ruoping,Liu Jing,Mao Jionghui,et al.Influence of nitriding modes and ammonia on nitrogen content of oriented silicon steel[J].Heat Treatment of Metals,2009,34(10):69-71.
[2]赵斌.低温取向硅钢渗氮工艺的研究[D].沈阳:东北大学,2011.
[3]付兵,项利,仇圣桃,等.获得抑制剂法生产低温高磁感取向硅钢的抑制剂控制研究进展[J].过程工程学报,2014,14(1):173-180.Fu Bing,Xiang Li,Qiu Shengtao,et al.Research advances in inhibitors control of low-temperature high magnetic induction grainoriented silicon steel production with acquired inhibitor method[J].The Chinese Journal of Process Engineering,2014,14(1):173-180.
[4]曾贵民,罗海文,李军,等.取向硅钢低温加热工艺中渗氮工序的实验与数值模拟研究[J].金属学报,2017,53(6):743-750.Zeng Guimin,Luo Haiwen,Li Jun,et al.Experimental studies and numerical simulation on the nitriding process of grain-oriented silicon steel[J].Acta Metallurgica Sinica,2017,53(6):743-750.
[5]周黎明.取向硅钢氮化与Al N形成的模拟计算[D].沈阳:东北大学,2008.
[6]黄祥斌,鲍思前,赵刚,等.低温取向硅钢初次再结晶动力学模型及织构演变[J].钢铁研究学报,2017,29(7):577-582.Huang Xiangbin,Bao Siqian,Zhao Gang,et al.Primary recrystallization kinetics and texture evolution during annealing of low temperature grain-oriented silicon steel[J].Journal of Iron and Steel Research,2017,29(7):577-582.
[7]Bao S Q,Xu Y,Zhao G,et al.Microstructure,texture and precipitates of grain-oriented silicon steel produced by thin slab casting and rolling process[J].Journal of Iron and Steel Research(International),2017,24(1):91-96.
[8]秦开明,刘冬梅,于翔,等.温度对离子渗氮渗层厚度及表面硬度的影响[J].河南石油,2004(5):60-61.Qing Kaiming,Liu Dongmei,Yu Xiang,et al.Effect of temperature on the thickness and surface hardness of ionic nitriding[J].Henan Petroleum,2004(5):60-61.
[9]张代东,吴润.材料科学基础[M].北京:北京大学出版社,2011:142.
[10]Takahashi N,Harase J.Recent development of technology of grain oriented silicon steel[J].Materials Science Forum,1996,204:143-154.
[11]Yashiki H,Kaneko T.Effect of aluminum content on secondary recrystallization of ultra-low carbon 2.2%Si-1.5%Mn steel[J].Tetsu to Hagane,1994,80(8):659-663.
[12]Mittemeijer E J,Somers M A J.Thermodynamics,kinetics,and process control of nitriding[J].Surface Engineering,1999,13(6):483-497.
[13]Yang Y L,Yang C H,Lin S N,et al.Effects of Si and its content on the scale formation on hot-rolled steel strips[J].Materials Chemistry and Physics,2008,112(2):566-571.
[14]蒋晔.Si元素和热轧工艺参数对碳钢表面氧化铁皮组织和性能的影响[D].沈阳:沈阳大学,2015.
[15]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):45-48.Wu Zongwang,Li Jun,Zhao Yu,et al.Rules of precipitate transformation for grain-oriented silicon steels producted by acquired inhibitor method[J].Journal of Iron and Steel Research,2011,23(12):45-48.
[16]吴忠旺,赵宇,李军,等.后天抑制剂取向硅钢析出物的研究[J].材料工程,2012(7):55-58.Wu Zhongwang,Zhao Yu,Li Jun,et al.Study on precipitates of grain-oriented silicon steel produced by acquired inhibitor method[J].Journal of Materials Engineering,2012(7):55-58.
[17]周博文,李光强,朱诚意,等.抑制剂形成元素对取向硅钢中夹杂物析出行为及热轧组织的影响[J].钢铁钒钛,2014,35(5):110-116.Zhou Bowen,Li Guangqiang,Zhu Chengyi,et al.Influence of elements used as inhibitor on precipitation behavior of the inclusions and hot rolled microstructure of grain-oriented silicon steel[J].Iron Steel Vanadium Titanium,2014,35(5):110-116.
[2]赵斌.低温取向硅钢渗氮工艺的研究[D].沈阳:东北大学,2011.
[3]付兵,项利,仇圣桃,等.获得抑制剂法生产低温高磁感取向硅钢的抑制剂控制研究进展[J].过程工程学报,2014,14(1):173-180.Fu Bing,Xiang Li,Qiu Shengtao,et al.Research advances in inhibitors control of low-temperature high magnetic induction grainoriented silicon steel production with acquired inhibitor method[J].The Chinese Journal of Process Engineering,2014,14(1):173-180.
[4]曾贵民,罗海文,李军,等.取向硅钢低温加热工艺中渗氮工序的实验与数值模拟研究[J].金属学报,2017,53(6):743-750.Zeng Guimin,Luo Haiwen,Li Jun,et al.Experimental studies and numerical simulation on the nitriding process of grain-oriented silicon steel[J].Acta Metallurgica Sinica,2017,53(6):743-750.
[5]周黎明.取向硅钢氮化与Al N形成的模拟计算[D].沈阳:东北大学,2008.
[6]黄祥斌,鲍思前,赵刚,等.低温取向硅钢初次再结晶动力学模型及织构演变[J].钢铁研究学报,2017,29(7):577-582.Huang Xiangbin,Bao Siqian,Zhao Gang,et al.Primary recrystallization kinetics and texture evolution during annealing of low temperature grain-oriented silicon steel[J].Journal of Iron and Steel Research,2017,29(7):577-582.
[7]Bao S Q,Xu Y,Zhao G,et al.Microstructure,texture and precipitates of grain-oriented silicon steel produced by thin slab casting and rolling process[J].Journal of Iron and Steel Research(International),2017,24(1):91-96.
[8]秦开明,刘冬梅,于翔,等.温度对离子渗氮渗层厚度及表面硬度的影响[J].河南石油,2004(5):60-61.Qing Kaiming,Liu Dongmei,Yu Xiang,et al.Effect of temperature on the thickness and surface hardness of ionic nitriding[J].Henan Petroleum,2004(5):60-61.
[9]张代东,吴润.材料科学基础[M].北京:北京大学出版社,2011:142.
[10]Takahashi N,Harase J.Recent development of technology of grain oriented silicon steel[J].Materials Science Forum,1996,204:143-154.
[11]Yashiki H,Kaneko T.Effect of aluminum content on secondary recrystallization of ultra-low carbon 2.2%Si-1.5%Mn steel[J].Tetsu to Hagane,1994,80(8):659-663.
[12]Mittemeijer E J,Somers M A J.Thermodynamics,kinetics,and process control of nitriding[J].Surface Engineering,1999,13(6):483-497.
[13]Yang Y L,Yang C H,Lin S N,et al.Effects of Si and its content on the scale formation on hot-rolled steel strips[J].Materials Chemistry and Physics,2008,112(2):566-571.
[14]蒋晔.Si元素和热轧工艺参数对碳钢表面氧化铁皮组织和性能的影响[D].沈阳:沈阳大学,2015.
[15]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):45-48.Wu Zongwang,Li Jun,Zhao Yu,et al.Rules of precipitate transformation for grain-oriented silicon steels producted by acquired inhibitor method[J].Journal of Iron and Steel Research,2011,23(12):45-48.
[16]吴忠旺,赵宇,李军,等.后天抑制剂取向硅钢析出物的研究[J].材料工程,2012(7):55-58.Wu Zhongwang,Zhao Yu,Li Jun,et al.Study on precipitates of grain-oriented silicon steel produced by acquired inhibitor method[J].Journal of Materials Engineering,2012(7):55-58.
[17]周博文,李光强,朱诚意,等.抑制剂形成元素对取向硅钢中夹杂物析出行为及热轧组织的影响[J].钢铁钒钛,2014,35(5):110-116.Zhou Bowen,Li Guangqiang,Zhu Chengyi,et al.Influence of elements used as inhibitor on precipitation behavior of the inclusions and hot rolled microstructure of grain-oriented silicon steel[J].Iron Steel Vanadium Titanium,2014,35(5):110-116.