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| 1 | 核电站设备维修中混合现实技术的应用研究显示文摘随着计算机硬件和软件技术的不断发展,虚拟现实技术变得日渐成熟,进而发展出了增强现实、混合现实等概念和技术,并已在各个领域中获得了广泛的应用,其中包括核电站领域。目前在核电站设备维修工作中,需要维护人员携带维修手册或平板电脑,以及包含多种工具的修理箱,走到故障设备处进行维修。具有无法解放双手,无法得到实时的指导,只能依靠维修人员个人的技术和经验,同时容易走错隔间,误操作设备等弊端。针对这些问题,可以利用混合现实技术,基于HoloLens混合现实设备,开发包括界面、仿真、综合分析、指导、监督五个模块在内的核电站设备维修辅助系统。系统可以指导维修人员走到正确的位置,并进行科学合理的维修操作,同时实时监控,一旦维修人员有错误操作,发出警告并引导其将错误改正,从根本上提高维修效率。 | 李喆 陈佳宁 张林鍹 | 2018 | 计算机仿真2018，35，5： | 12 |
| 2 | Effects of electrode configuration on electroslag remelting process of M2 high-speed steel ingot显示文摘The electrode configuration determines the thermophysical field during the electroslag remelting(ESR) process and affects the final microstructure of the ingot. In this work, ingot with a diameter of 400 mm was prepared with two electrode configuration modes of single power ESR process, namely one electrode(OE) and two series-connected electrodes(TSCE). Finite element simulation was employed to calculate the electromagnetic field, flow field and temperature field of the ESR system. The results show that the temperature of the slag pool and the metal pool of the TSCE process is lower and more uniform than that of the OE process.The calculated temperature distribution of the ingot could be indirectly verified from the shape of the metal pool by the experiment. The experimental results show that the depth of the metal pool in the OE ingot is about 160 mm, while the depth of the TSCE ingot is nearly 40 mm shallower than that of the OE ingot. Microstructural comparisons indicate that coarse eutectic carbides are formed in the center of the OE ingot, whereas more even eutectic carbides appear in the center of the TSCE ingot. In general, compared with the OE process, the TSCE process is preferred to remelt high speed steel ingots. | Fu-xing Yin Yu Liang Zhi-xia Xiao Jian-hang Feng Zhi-bin Xie Yong-wang Mi | 2019 | China Foundry2019，16，2： | 3 |
| 3 | Structure modification and constant remelting speed control of a 120-t three-phase electroslag furnace显示文摘The traditional large electroslag remelting furnaces have many shortages,such as high short-network impedance and inductance,long maintenance time for electrode replacement,low stiffness of driveline,and low control accuracy of remelting speed.The present research was aimed to solve these problems through structure modification and constant remelting speed control for a 120-t electroslag remelting(ESR) furnace.Based on the technique of three-phase double electrodes in series,the short-network system and the structure of the 120-t ESR furnace were improved;and a continuous feeding system for the self-consumption electrode was proposed.A selfdesigned fully hydraulic driveline system with three degrees of freedom was successfully applied to the 120-t ESR furnace.An electrode auto-replacement system and the S-style speed-control curve of electrode-feeding system were designed on the basis of the soft measurement/sensing model on the remaining electrode length so as to obtain a high accuracy control system for constant remelting speed.The experiment products showed good surface quality and cross-sectional results,indicating good system control,and verifying the effectiveness of the structure modification of the furnace. | Wang Changzhou Song Jinchun | 2012 | China Foundry2012，9，4： | 3 |
| 4 | Phenomena at three-phase electroslag remelting显示文摘The electroslag remelting(ESR)process is widely used to produce high-quality ingots and billets for high-alloyed steels and alloys.Both the single-phase and three-phase alternating current diagram with bifilar and monofilar connection are in use for heavy ingot manufacturing.The numerical simulation of the three-phase bifilar circuit for the 120 t three-phase bifilar six-electrode ESR furnace at different variants of electric connection was presented and discussed.At the bifilar diagram of power supply,the geometrical location of electrodes in a mould holds critical importance for performances:the close location of bifilar pair electrodes provides the highest heat productivity,but the equidistant location of electrodes gives a much more uniform heat distribution.The monofilar mulit-electrode diagram of three-phase connection without phase shift shows the most uniform distribution of potential and heat generation as well as a favorable magnetic field that makes this kind the most promising for providing a high quality of heavy ingots. | Zhong-li Liu Lev Medovar Ganna Stovpchenko Volodymyr Petrenko Artem Sybir Yev.Volchenkov | 2021 | China Foundry2021，18，6： | 0 |
| 5 | Effect of vibrating electrode on temperature profiles,fluid flow,and pool shape in ESR system based on a comprehensive coupled model显示文摘The vibrating electrode method was proposed in the electro-slag remelting(ESR) process in this paper,and the effect of vibrating electrode on the solidification structure of ingot was studied.A transient threedimensional(3D) coupled mathematical model was established to simulate the electromagnetic phenomenon,fluid flow as well as pool shape in the ESR process with the vibrating electrode.The finite element volume method is developed to solve the electromagnetic field using ANSYS mechanical APDL software.Moreover,the electromagnetic force and Joule heating are interpolated as the source term of the momentum and energy equations.The multi-physical fields have been investigated and compared between the traditional electrode and the vibrating electrode in the ESR process.The results show that the drop process of metal droplets with the traditional electrode is scattered randomly.However,the drop process of metal droplets with the vibrating electrode is periodic.The highest temperature of slag layer with the vibrating electrode is higher than that with the traditional electrode,which can increase the melting rate due to the enhanced heat transfer in the vicinity of the electrode tip.The results also show that when the amplitude and frequency of the vibrating electrode increase,the cycle of drop process of metal droplets decreases significantly. | Fang Wang Yan-chun Lou Rui Chen Zhao-wei Song Bao-kuan Li | 2015 | China Foundry2015，12，4： | 0 |
| 6 | Effects of electrode immersion depth and remelting rate on electroslag remelting process显示文摘In the electroslag remelting process, the electrode molten state is a critical factor determining the ingot quality, while the electrode immersion depth and melting rate are key factors for the stability of the electroslag re-melting process. Studies were carried out to investigate the microscopic and macroscopic effects of electrode immersion depth and melting rate on the potential distribution and heat density in the slag bath, and on the depth and shape of the molten bath. Based on the finite element method and the numerical solution method, the effect of the electrode immersion depth on the slag bath heat density was researched; the relationship between the electrode immersion depth and the slag resistance was obtained; and the unsteady-state model of the solidification process of the re-melting ingot was solved using the finite difference method. The mathematical model and physical model of the electrode melting process were established and solved; and the corresponding curves between the electrode molten-state and slag-bath physical parameters were obtained. The experimental results verified the simulated results studied in this paper. | Song Jinchun Wang Changzhou Li Song | 2014 | China Foundry2014，11，3： | 0 |
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