tass.ru: The Method for Mixing Alloys with an Electromagnet Has Been Proposed

Scientists from Samara Polytechnic University, together with the researcher from Samara University, proposed mixing melts by using electromagnetic pulses. The press service of Russia’s Ministry of Education and Science informed TASS that the new method would improve the quality of cast products.

“Scientists from Samara Polytechnic University’s Department of Foundry and High-Efficiency Technologies, together with Vladimir Glushchenkov, Professor at Samara University’s Department of Metal Forming, found out that it is possible to ensure the required mixing quality by magnetically pulsing the melt. The research results are published in the journal Foundry Production”, is said in the report.

As explained in the Ministry of Education and Science, for improving the quality of cast products, it is necessary to achieve uniformity of the metal alloy by mixing it. But tools traditionally used for this purpose, such as mechanical agitators, electromagnetic fields, ultrasonic vibration, gas pulse action, etc., turn out to be less effective than the method proposed by scientists from Samara Polytechnic University.

“A pulsed magnetic field is generated around the coils of an inductor of a magnetic pulse installation. Then it penetrates through the wall of a crucible made of a non-metallic non-electrically conductive material and affects the melt, inducing eddy currents in it”, explained Konstantin Nikitin, Head of the Department of Foundry and High-Efficiency Technologies, Dean of the Faculty of Mechanical Engineering, Metallurgy and Transport at Samara Polytechnic University.

The scientists explained that interacting of magnetic fields of the currents in the inductor and in the melt results in electrodynamic, non-contact forces to arise, which ensure mixing. Moreover, the effect of the pulsed magnetic field on the melt can be single or multiple. The installation for this effect is designed to control the shape and magnitude of the thermal force action on the melt during mixing. The team of scientists is working to improve the uniformity of the pulsed magnetic field impact on the melt.

Source: nauka.tass.ru