The wire cutting electrode wire mainly consists of molybdenum wire and copper wire. Choose molybdenum wire, or choose copper wire, it depends on what car is open, is low speed, or high speed fast, or super speed? Open slow wire (low speed wire), using copper wire; For fast (high speed) and medium running wires, molybdenum wires are used. Today we will focus on molybdenum wire instead of copper wire.
Nowadays, molybdenum wire has been widely used in modern mold processing. Therefore, it occupies more and more important position in the deep processing industry of molybdenum metal. Among them, at present, the market used in wire EDM molybdenum wire mainly pure molybdenum wire and molybdenum lanthanum alloy wire. This is a bit tricky, because when there is something greater than 1 (integer only), a lot of times that means a choice. So, how to choose molybdenum wire for wire cutting electrode wire? This needs to understand the requirements of wire cutting processing on molybdenum wire.
Some researchers take pure molybdenum electrode wire (pure molybdenum wire) and molybdenum lanthanum electrode wire (molybdenum lanthanum alloy wire) as experimental objects, under the same EDM wire cutting conditions, respectively, to test their performance, and find that:
1.0 Due to arc discharge, pure molybdenum wire is prone to brittle fracture when the working temperature exceeds 1200℃, while molybdenum lanthanum alloy wire is prone to brittle fracture when the working temperature exceeds 1400℃. This point is mainly about the high temperature performance of the electrode wire.
2.0 Continuous moving molybdenum wire is easy to be broken due to lack of strength. When φ=0.18mm, the tensile strength of pure molybdenum wire is 1800-2200N /mm2, while that of molybdenum lanthanum alloy wire is 1900-2300N /mm2. This point is mainly about the strength of the electrode wire.
3.0 When φ=0.18mm, the metal cutting amount of pure molybdenum wire is about 4000mm2/h, while that of molybdenum lanthanum alloy wire is about 4500mm2/h. This point is mainly about the discharge performance of the electrode wire.
4.0 When φ=0.18mm, the diameter loss of pure molybdenum wire is about 0.0006875mm/h, while that of molybdenum lanthanum alloy wire is about 0.0006565mm/h. This is mainly about the damage resistance of the electrode wire.
5.0 When φ=0.18mm, the average cutting amount of pure molybdenum wire and molybdenum lanthanum alloy wire reaches 200,000mm2 and 300,000mm2 respectively, the electrode wire will be broken or badly worn and need to be replaced.
