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VACUUM ›› 2022, Vol. 59 ›› Issue (6): 1-9.doi: 10.13385/j.cnki.vacuum.2022.06.01

• Vacuum Metallurgy and Thermal Engineering •     Next Articles

Progress in the Control Technology of Vacuum Arc Remelting Furnace, Vacuum Arc Skull Casting Furnace

SONG Qing-zhu1, E Dong-mei1, WANG Ling-ling2, QIAO Zhong-lu3, ZHANG Zhe-kui1, SUN Zu-lai1   

  1. 1. Shenyang Vacuum Technology Institute Co., Ltd., Shenyang 110042, China;
    2. SAC/TC 18, Shenyang 110042, China;
    3. National Vacuum Equipment Quality Inspection and Testing Center, Shenyang 110042, China
  • Received:2022-03-05 Online:2022-11-25 Published:2022-12-05

Abstract: The working principle and development status of vacuum arc remelting furnace and vacuum arc skull casting furnace are described. This paper introduces the development of vacuum arc remelting(VAR) technology control technology, and points out the important significance of arc detection and regulation for the safe operation of large vacuum arc skull furnace. Although the melt rate control realizes the stability of the profile of the melt pool mushy. However, the arc motion changes the heat distribution of the pool. The optimization of arc distribution state based on melt rate control is the development direction of high quality ingots and process equipment. According to the arc motion characteristics, the arc distribution model is divided into four categories: concentrated, diffusive, eccentric and rotating. The distribution model of diffusive arc plays an obvious role in improving the profile of melt pool and the quality of ingots. VAR control technology is divided into three components: arc distribution, melt pool characteristics and solidification process. Aiming at the electromagnetic characteristics of arc, magnetic field is used to detect and regulate the arc distribution, which will bring new technological innovation to VAR process. The control system with Hall effect magnetic field sensor array and Helmholtz coils has been applied in industrial VAR furnace to verify the effectiveness of the control system in arc detection and regulation.

Key words: vacuum arc remelting, vacuum arc skull casting, melt rate control, dripshort control, vacuum arc distribution, Helmholtz coil

CLC Number: 

  • TF13
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