Gold alloy bonding wire and preparation method thereof

The invention belongs to the technical field of bonding wires, and particularly relates to a gold alloy bonding wire and a preparation method thereof.The preparation method comprises the operation steps of material preparation, alloy smelting and pull casting, wire drawing, annealing and wire winding. The molten alloy solution is cooled to the room temperature along with the reaction cavity and repeatedly heated for 2-3 times, the alloy solution flows into the crucible I through the crucible II, the electromagnetic coil stirs the alloy solution in the graphite sleeve, the rodless air cylinder drives the outer sleeve to move, and the alloy solution flows into the crucible II through the crucible II; the alloy solution is subjected to stirring and vibration deposition through electromagnetic force of the first-stage crystallization assembly and the second-stage crystallization assembly, the alloy solution is crystallized in cooperation with multiple times of cooling, and therefore the convection, heat transfer