Special line cutting electrode molybdenum wire and its manufacturing method

Abstract

The present invention relates to a special wire-cutting electrode molybdenum wire. Its weight composition includes molybdenum powder and doped rare-earth oxide La2O3, the weight content of La2O3 is 0.2-0.6%. Its preparation method includes the following steps: adding lanthanum nitrate aqueous solution into molybdenum dioxide powder, heating to make decomposition at 80-100 deg.C, uniformly mixing, then make hydrogenation reduction in furnace at 800-1000 deg.C to obtain the molybdenum powder in which rare earth oxide La2O3 is doped, finally making the molybdenum powder into molybdenum wire.

Description

technical field

[0001] The invention belongs to a rare-earth molybdenum alloy material for electric discharge wire cutting electrode wire and a manufacturing method thereof. Background technique

[0002] The wire electric discharge machine can automatically cut and process various shapes of dies and parts, and has the advantages of high precision, fast speed and short cycle. The traditional wire cutting electrode wire uses pure molybdenum wire, using pure molybdenum rods as raw materials, through metal calendering processes such as swaging and stretching, to produce wires of various diameters. Due to the low tensile strength of pure molybdenum wire, the electrode wire moves at a fast speed (300-700mm / min) during the operation of the wire electric discharge machine, and it runs in a two-way back and forth cycle, so it is very easy to break the wire during the processing , the service life is short, resulting in low utilization rate of molybdenum wire and serious waste. Con...