Tungsten wires are made from tungsten and other precious metals. Pure tungsten wires are used for wrapping core wires, supports, lead wires, heating elements, tungsten foil strips, and coating automotive parts. Lanthanum tungsten wires are suitable for winding glass seals, tungsten foil strips, electric furnace heating materials, and high-temperature wire-cutting components.
During wire EDM machining, high-performance wires must possess various beneficial characteristics. Under high temperatures and heavy loads, the coating should exhibit high interlayer peel strength. Molybdenum, due to its wear resistance, is widely regarded as a material for metal thermal spraying technology. It is extensively used in the thermal spraying of surfaces on automotive components such as piston rings, timing rings, and gearboxes.

Electrical properties of wire EDM molybdenum wire:
Modern wire-cutting power supplies impose strict requirements on the electrical wire. They must withstand high cutting currents, with peak values exceeding 700 amperes or average values over 45 amperes, and energy transmission must be efficient to provide the pulse current needed to achieve high surface finish (above 0.2Ra). This depends on the wire's resistance or conductivity. Copper is one of the materials with high conductivity, used as a benchmark for other materials. The conductivity of copper is measured in IACS (International Annealed Copper Standard), while brass has a conductivity of 20%.

The diameter of wire EDM molybdenum wire typically ranges from 0.12 to 0.20 millimeters, which is a commonly used size. The diameter of molybdenum wire available on the market can be smaller, down to 0.1 millimeters, or larger, up to 0.3 millimeters. These smaller or larger wires are mainly used for special requirements or when processing special materials.

The diameter of molybdenum wire directly affects processing accuracy and efficiency. Smaller diameter molybdenum wire can be cut in finer lines, suitable for precision processing, but it has lower strength and is prone to breakage. Larger diameter molybdenum wire can withstand higher loads, ideal for high-intensity processing tasks, but may compromise some processing accuracy. Therefore, when selecting the diameter of molybdenum wire, it is necessary to decide based on specific processing requirements.
When the wire cutting machine breaks a wire, most of the broken ends are within 10 to 20 turns after the wire spool is changed. The molybdenum wire at both ends is prone to breakage. The solution is to time the movement of the molybdenum wire spool's forward and reverse stroke control block in or out.