Differential phase pulse magnetic field electromagnetic continuous casting method

Abstract

The invention provides a differential phase pulse magnetic field electromagnetic continuous casting method. In a horizontal continuous casting process, a vertical continuous casting process or a semi-continuous casting process, 2n excitation coils are arranged in the crystallizer in the axial direction of a cast ingot; each excitation coil is divided into two groups, a differential phase pulse magnetic field power supply system is adopted, two groups of component wave pulse voltages and sawtooth-shaped pulse currents are output to act on the two sets of excitation coils correspondingly, and act on a paste region of molten metal and metal, the generated phase angle difference phi of the two groups of electromagnetic pulse signals is 90 degrees, and a differential phase traveling wave magnetic field is formed in the pasty region of the metal melt and the metal. The method can be applied to preparation of ingots with different shapes and geometrical sizes; the alloy element segregation ofproduced products is greatly reduced; the grain size is greatly reduced; and the mechanical property and the rate of finished products are remarkably improved.

Description

technical field

[0001] The invention belongs to the field of metal material processing, in particular to an electromagnetic continuous casting method with a phase difference pulse magnetic field. technical background

[0002] As the main preparation method of metal and alloy ingots, vertical and horizontal continuous casting technology has the advantages of high production efficiency, low casting cost, and simple operation; Cooling is faster than the internal metal liquid and solidifies first, and the core of the slab is prone to loose structure; in addition, for large-sized slabs with large width and thickness, the temperature difference between the inside and outside is large during solidification, which is likely to cause coarse grains in the core of the ingot, and severe The macroscopic and microscopic segregation of the ingot is prone to defects such as cracks, which greatly reduces the mechanical properties and deformation capacity of the material; The solidification ...

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