Vacuum Arc Remelting Furnace

The heyu vacuum arc remelting furnace (VAR) refins metallic ingots by melting a consumable electrode inside a water-cooled copper crucible under a high vacuum, using a direct-current arc as the heat source. The electrode is fed downward into the crucible, and the molten metal drops solidify directionally in the copper mould, producing an ingot with a uniform, fine-grained structure and reduced gas and impurity content. Because melting and solidification take place without contact with refractory linings, VAR is the standard route for titanium and titanium alloys, nickel-based superalloys, and high-purity steels where inclusion size and gas content directly decide fatigue life. The water-cooled copper crucible prevents contamination, while the vacuum envelope removes dissolved hydrogen and volatile impurities, solving segregation and inclusions problems that conventional air-melted ingots cannot.

For VAR projects, our 6-engineer R&D team engineers the consumable-rod feed system, copper crucible geometry, and DC power supply around your ingot diameter and alloy specification, and we build to your technical drawings or prototype. Customized equipment development typically takes about 30 days from drawing confirmation, and the first unit is released only after customer inspection and acceptance. The resulting ingot solidifies upward from the copper mould bottom into a fine, directionally oriented grain column, with gas and tramp elements drawn off under vacuum rather than trapped at grain boundaries - the structural reason VAR ingots respond consistently in downstream forging and ultrasonic inspection.