A controllable strong electric pulse generator for refining metallographic structure

Abstract

The invention provides a controllable strong electric pulse generating device for refining the metallographic structure, which includes two parallel switches connected to a power frequency power supply and connected to a transformer B, and the transformer B is connected to a controllable rectification circuit T1, the controllable rectifier circuit T1 has several current-limiting resistors R1 in series, and each current-limiting resistor R1 is respectively connected in series with a capacitor C1 and a switching capacitor switch K2, and a capacitor switch K4 and voltage are connected in parallel between the capacitor C1 and the switching capacitor switch K2 The discharge thyristor T2 is connected in series between the meter and the load, the voltmeter and the load; the output current of the control system controls the controllable rectifier circuit T1 and the discharge thyristor T2, and controls the charging current and discharging frequency of the system. The device is a cost-effective, easy-to-operate high-energy-density electric pulse power supply device, which has high pulse energy, pulse peak value and pulse peak voltage, thereby achieving grain refinement and modification of the structure.

Description

technical field [0001] The invention relates to an electric pulse generating device, in particular to a controllable strong electric pulse generating device for the research and production of metamorphic treatment, structure refinement, modification and material forming of metals and their alloys under the action of strong pulsed electromagnetic field. Background technique [0002] Since the solidification structure of the metal has a very important influence on the properties of the material and subsequent processing, controlling and improving the solidification structure of the metal is one of the topics that material workers pay attention to, especially for large ingots. Due to the long solidification time, it is easy to Composition segregation is formed, which in turn causes macro segregation, and defects such as shrinkage cavity and porosity appear at the same time. Many commonly used methods for improving solidification structure are difficult to apply to large ingots. ...

AI Technical Summary

Problems solved by technology

The controllable electromorphic pulse power supply provided by the invention has a wide pulse energy range, which is conducive to systematic research on the influence of electromorphic process parameters and the optimization of process parameters, but the structure of the device is complex and difficult to operate and control

This patent adopts a three-phase high-voltage rectification circuit with high cost and complex structure, pulse forming and its control circuit, the equipment cost is high and the operation is complicated

Images