钛(Ti)含量对大型水轮机转子用磁轭钢力学及磁学性能的影响
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摘要
为研究钛(Ti)含量对含Ti系微合金磁轭钢力学性能和磁性能的影响机理,采用真空冶炼及轧制的方法来调控磁轭钢中不同含量的Ti对钢中钛的第2相析出物的形状、分布和数量.通过金相、扫描电子显微镜以及透射电镜对不同Ti含量磁轭钢中的第2相析出物及组织进行观察.结果表明:含Ti系磁轭试验钢中的Ti通过细化晶粒和Orowan绕过机制2种机理一起对其产生了强烈的强化效果.Ti含量越高,强化效果越明显.含Ti系磁轭试验钢的高场磁感性能随着Ti含量的增加而减小,而铁损随着Ti含量的增加而增加.当Ti含量在0.16%～0.20%之间时,含Ti系微合金磁轭钢才能同时满足力学性能和磁性能的技术标准要求.
In order to study the effect of Ti content on the mechanical and magnetic properties of Ti-bearing microalloyed yoke steel, vacuum smelting and rolling are used to control the shape, distribution and quantity of the second phase precipitates of Ti in the yoke steel with different Ti contents. Finally, the second phase precipitates in different Ti contents yoke steels are observed by metallography, scanning electron microscopy and transmission electron microscopy. The results show that the Ti in the test steel has strong effect on the strengthening by the two kinds of mechanism of grain refinement and Orowan bypassing mechanism. The higher the Ti content is, the more obvious the effect is. The high field magnetic inductivity of the steel containing Ti yoke decreases with the increase of Ti content; while the iron loss increases with the increase of Ti content. When the Ti content was between 0.16% and 0.20%, Ti-bearing microalloyed magnetic yoke steel meets both the mechanical and magnetic properties of technical standards.
In order to study the effect of Ti content on the mechanical and magnetic properties of Ti-bearing microalloyed yoke steel, vacuum smelting and rolling are used to control the shape, distribution and quantity of the second phase precipitates of Ti in the yoke steel with different Ti contents. Finally, the second phase precipitates in different Ti contents yoke steels are observed by metallography, scanning electron microscopy and transmission electron microscopy. The results show that the Ti in the test steel has strong effect on the strengthening by the two kinds of mechanism of grain refinement and Orowan bypassing mechanism. The higher the Ti content is, the more obvious the effect is. The high field magnetic inductivity of the steel containing Ti yoke decreases with the increase of Ti content; while the iron loss increases with the increase of Ti content. When the Ti content was between 0.16% and 0.20%, Ti-bearing microalloyed magnetic yoke steel meets both the mechanical and magnetic properties of technical standards.
引文
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[15] Wang Y, Yin S, Huang H. Polishing characteristics and mechanism in magnetorheological planarization using a permanent magnetic yoke with translational movement[J]. Precision Engineering, 2016, 43(5): 93-104.
[2] 宋畅, 高智平, 刘昌明, 等. 800 MPa级高强度磁轭钢的研究与开发[J]. 武钢技术, 2016,54 (5): 25-27. Song Chang, Gao Zhiping, Liu Changming, et al. Research and development of 800 MPa high strength yoke steel [J]. WISCO Technology, 2016,54(5): 25-27.
[3] 向前, 吴开明, 黄双, 等. 电工钢用单片测量方法测量偏差分析[J].钢铁研究,2017,45 (4): 42-45. Xiang Qian, Wu Kaiming, Huang Shuang, et al. Measurement deviation analysis of monolithic measurement method for electrical steel [J].Research on Iron and Steel, 2017,45 (4): 42-45.
[4] 吕志鹏, 陈泓宇. 厚环板分段式磁轭在安装过程中的调整和控制[J]. 水电站机电技术, 2018, 41(4): 39-46. Lu Zhipeng, Chen Hongyu. Adjustment and control of thick ring plate segmented yoke during installation [J]. Electrical and Mechanical Technology of Hydropower Station, 2018,41(4): 39-46.
[5] 张天德. 水轮发电机磁轭、磁极冲片的材料和制造工艺选择[J]. 东方电机, 2013, (5): 17-22. Zhang Tiande. Material and manufacturing process selection of yoke and pole punch for hydroelectric generator [J]. Dongfang Motor, 2013, (5): 17-22.
[6] Modena M, Leuxe R, Struik M. Results on ultra-precise magnet yoke sectors assembly tests[J]. IEEE Transactions on Applied Superconductivity, 2014, 24(24): 1-4.
[7] Miao X, Dai X, Huang Y, et al. Segmented magnetic circuit simulation of the large displacement planar micro-coil actuator with enclosed magnetic yokes[J]. Microelectronic Engineering, 2014, 129(16): 38-45.
[8] Gargov N P, Zobaa A F, Pisica I. Separated magnet yoke for permanent magnet linear generator for marine wave energy converters[J]. Electric Power Systems Research, 2014, 109(4): 63-70.
[9] Tao J, Hu S, Yan F, et al. A study of the mechanism of delamination fracture in bainitic magnetic yoke steel[J]. Materials & Design, 2016, 108: 429-439.
[10] Wulf M D , Jacobs S , Melkebeek J . Influence of material quality on the magnetic and mechanical properties of steel sheet for salient pole electrical machines[J]. Journal of Magnetism and Magnetic Materials, 2003, 254(10): 621-623.
[11] 章友谊,屈金山,李娟,等.Domex 700 MC钢性能及其衔接接头显像组织分析[J].西华大学学报(自然科学版),2006,25(2):80-83. Zhang Youyi, Qu Jinshan, Li Juan, et al. Properties of steel Domex 700 MC and analysis of microstructure formation of the welded joints[J]. Journal of Xihua University, 2006, 25(2): 80-83.
[12] Song H Y, Liu H T, Wang Y P, et al. Microstructure and texture evolution of ultra-thin grain-oriented silicon steel sheet fabricated using strip casting and three-stage cold rolling method[J]. Journal of Magnetism and Magnetic Materials, 2017, 426: 32-39.
[13] Wang Y P , Liu H T , Song H Y , et al. Ultra-thin grain-oriented silicon steel sheet fabricated by a novel way: Twin-roll strip casting and two-stage cold rolling[J]. Journal of Magnetism and Magnetic Materials, 2018, 452: 288-296.
[14] Wang Y, Zhang L, Zhuo Z, et al. All-normal dispersion fiber lasers with magneto-optical polarization controllers[J]. Applied Optics, 2017, 56(3): 404-408.
[15] Wang Y, Yin S, Huang H. Polishing characteristics and mechanism in magnetorheological planarization using a permanent magnetic yoke with translational movement[J]. Precision Engineering, 2016, 43(5): 93-104.