Analysis of the Effect of External Physical Fields on the Casting of Light Alloys

Danilov, P.A.; Khrustalev, A. P.; Vorozhtsov, A. B.; Жуков, И. А.; Promakhov, Vladimir; KHMELEVA, Marina Grigor’evna; Pikushchak, E.; Kvetinskaya, A. V.

doi:10.17223/19988621/55/8

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“…With electromagnetic field treatment, this is due to the refinement of clusters by vortex melt flows [5][6][7][8]. In the case of vibration and mechanical stirring, this is due to the collision and refinement of the crystallization nuclei [9,10]. Each of these methods has its own characteristics and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Results of Pulsed Processing of Melts

Krymsky

Shaburova

Litvinova

2020

Metals

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The paper presents the results of a relatively new method of external action on melts developed by the authors. The essence of the technology is the impact on melts before casting with electromagnetic pulses (EMP) of short duration (1 ns) and with high pulse power (2 kW). To create electromagnetic pulses, a generator with the following characteristics was used: pulse amplitude of 10 kV, the leading edge of the pulse was 0.1 ns, pulse duration of 1 ns, pulse repetition rate at 1 kHz, and a calculated pulse power of 2 MW. A distinctive feature of the generator used was its low power consumption of 50 Watts. The results of processing low-melting melts of the Al–50Pb, Bi–38Pb, and Bi–18Sn–32Pb systems presented in the work indicated that EMP treatment led to the occurrence of equilibrium crystallization of the metal, increasing its density. In addition to the experimental results, a theory is provided to explain the mechanism of the influence of pulse processing on the properties of metals of these and other systems previously studied by the authors.

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Section: Introductionmentioning

confidence: 99%