A Static Magnetic Soft Contact Stirring Composite Plasma Arc Melting Device and Method

Abstract

The invention discloses a static magnetic soft contact stirring composite plasma arc smelting device, which comprises a furnace body, a water-cooled copper crucible and a tungsten electrode are installed in the furnace body, the tungsten electrode is located above the water-cooled copper crucible, and the water-cooled copper crucible A groove for placing metal raw materials is opened on the crucible; a transmission shaft is pierced on the side wall of the water-cooled copper crucible, and a stepping motor is connected to the end of the transmission shaft located outside the water-cooled copper crucible. One end of the water-cooled copper crucible is sheathed with two turntables, and magnets with opposite magnetic properties are alternately arranged in the turntables, and the turntables are located on both sides of the groove. The present invention also provides a smelting method using the above-mentioned static magnetic soft contact stirring composite plasma arc smelting device, which can achieve the purpose of smelting the unmelted metal at the bottom of the water-cooled copper crucible through static magnetic soft contact stirring without turning over the metal.

Description

technical field [0001] The invention relates to the technical field of plasma arc melting, in particular to a static magnetic soft contact stirring compound plasma arc melting device and method. Background technique [0002] Plasma arc melting uses a concentrated and controllable stabilized plasma arc between electrodes and raw materials as a heat source to melt and refine metals. Plasma has high electrical conductivity, heat capacity and thermal conductivity. Plasma arc is a compression arc with concentrated energy, long and thin arc column, and the temperature is usually 5000-30000K. Plasma arc melting can effectively control the atmosphere in the furnace. The most commonly used inert gas is argon. According to different needs, the atmosphere in the furnace can be replaced to realize the melting of special metals or alloys. [0003] Most plasma arc melting processes use water-cooled copper crucibles. The metal at the bottom of the crucible is in direct contact with the w...

AI Technical Summary

Problems solved by technology

Another method is to use mechanical stirring, such as replacing the water-cooled copper crucible with a rotating roller, and relying on the friction between the rotating roller and the unmelted metal at the bottom to turn over the metal at the bottom, but the device used in this method has a complex structure and high cost. Precision fit between the rollers is required

Images