The Electromagnetic Confinement and Shaping Process of Liquid Metal

Abstract

The Electromagnetic Confinement and Shaping (EMCS) process is a crucibleless melting and mouldless shaping technology by alternating magnetic field. In this paper, stability of the shaping, effect factors of the electromagnetic force and the temperature field and the procedure of the EMCS process are systemically analyzed. The Results indicate that a good coupling of the temperature field and the electromagnetic force is important to stably shape for liquid metal, and the gravity force of liquid metal is more sensitive to change of the temperature (or the current through the inductor) than the electromagnetic force does above the melting point of the sample. Several stainless steel samples were obtained by EMCS process.

Study on process of dual-frequency electromagnetic confinement and shaping for stainless steel

“…In dual-frequency EMCS, there exist other effect factors to the temperature field besides the factors to the electromagnetic force mentioned above, e.g. drawing speed of the shaped sample and the heating inductor [12,16]. The heating inductor can affect magnitude and peak position of the temperature field without influence on the electromagnetic force.…”

“…One of the important factors is distribution of the magnetic flux density, which is related to current value of the inductor, D/H ratio of the inductor, obliquity of the inside wall, and position of the screen [10][11][12][13][14][15][16]. Increasing current value, decreasing D/H ratio, decreasing depth of the screen into the shaping Fig.…”

“…cold crucible induction melting process [5], the electromagnetic levitation [1][2][3]6], the electromagnetic casting [7][8][9], etc. Electromagnetic confinement and shaping (EMCS) is a recently developed electromagnetic processing of materials, which can simultaneously achieve heating, melting, and shaping of metal by using electromagnetic field in vacuum chamber [10][11][12][13][14][15][16]. Therefore, the chemical and physical interactions between molten metal and crucible and/or mould are avoided.…”