Application of semi-solid electromagnetic stirrer

            Electromagnetic stirring method             1 )The principle of electromagnetic stirrer             The basic structure of an electromagnetic stirrer in terms of ac induction method, is actually a can stimulate the magnetic field sensor, It likely imitation in the motor stator, crystallizer is equal to the rotor. The effects of the magnetic field sensors in molten metal which produced by molten steel in mold, and relative movement with metal, liquid metal and a conductive body, so, among them also produce feelings should be current, the current interact with sensor produced by the magnetic field generated by electromagnetic force, push the metal liquid movement. The way of movement determined by the magnetic field way movement, at present, widespread application of magnetic field are rotating magnetic field and travelling wave magnetic field.             Electromagnetic stirring method is the use of electromagnetic induction’s effect make the precipitate dentrite broken into granule, belong to the contactless stirring. So, metal molten is pure, not involved in gas, easy to control, high yield, is one of the main methods of industrial applications currently. This method applies to the high melting point alloy. Now, the dominant in the industrial production is electromagnetic stirring technology which called MHD (Magnetohydrofynamic), used in the production of continuous rheological ingot, including aluminum alloy ingots of a diameter of 50-110 mm.             2)The effect of stirring             To adopt advanced technology of electromagnetic stirring, through a large number of experiments at home and abroad and industrial manufacture through the use of electromagnetic stirring achieved the major results:              Reduce the slag content;             Reduce the center shrinkage cavity;             Eliminate macrosegregation;             Increase the equiaxial crystal ratio;             Improve solidification organization, etc.                 Semi-solid experimental electromagnetic stirrer             1)working principle             Electromagnetic stirring method using electromagnetic induction in half frozen produce induced current in the metal, induced current under the action of the plus a magnetic field make the metal solid liquid slurry strongly agitation, make traditional dendritic structure turn into non-dendrite’s mixing organization.             2)system composition             This system make up with high-performance 16 bit single chip microcomputer as the core system of AC-DC-AC frequency conversion power supply, electromagnetic sensors, operational control interface, cooling system, etc.             3)system advantage             In order to convenient laboratory research, the semi-solid metal in the sensors stress relations with dendrite. This system adopted voltage, frequency, stirring time continuous adjustable, make the semi-solid metal stress condition be clear at a glance. Simple operation control interface, man-machine interface simple and clear, all operations on the control panel can be finished immediately.             4)main technical parameters             Our company can customize equipment according to user requirements.