Preparation method for molybdenum alloy wires doped with nanometer rare earth oxides

Abstract

The invention discloses a preparation method for molybdenum alloy wires doped with nanometer rare earth oxides, comprising the following steps of: taking molybdenum alloy doped with nanometer rare earth oxides as raw materials; forging and rolling molybdenum alloy pole materials doped with nanometer rare earth oxides in multiple steps; and carrying out wire drawing operation on the pole materials by a turntable wire-drawing machine so as to prepare excellent molybdenum alloy wires doped with nanometer rare earth oxides. The molybdenum alloy wires have high strength, high extensibility and long service life. The preparation method for molybdenum alloy wires doped with nanometer rare earth oxides, provided by the invention, has the advantages of simple technology, high product yield, large output and capability of realizing industrialized production.

Description

technical field [0001] The invention belongs to the technical field of refractory metal materials for special precision machining, and relates to a preparation method of nano rare earth oxide doped molybdenum alloy wire. Background technique [0002] Molybdenum wire is the most widely used electrode wire and electric light source wire. At present, molybdenum wire mainly includes pure molybdenum wire and rare earth oxide doped molybdenum alloy wire. Since the tensile strength, elongation and toughness of pure molybdenum wire are lower than that of rare earth oxide doped molybdenum alloy wire, the performance and life of pure molybdenum wire are much lower than that of rare earth oxide doped molybdenum alloy wire. Doped molybdenum alloy wire instead of pure molybdenum wire has become the current development trend. [0003] The traditional preparation method of rare earth oxide-doped molybdenum alloy wire is to dope the salt solution corresponding to the rare earth oxide into...

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Problems solved by technology

But from the process of this preparation process, it can be found that: due to the method of liquid-solid mixing, there will inevitably be a droplet phenomenon of the salt solution corresponding to the rare earth oxide, which will cause the size of the reduced rare earth oxide to be difficult to obtain. Control, may reach the order of a few microns or even tens of microns, especially the degree of uniformity is still not ideal, and it is difficult to avoid the introduction of interstitial impurity elements

It is difficult to give full play to the strengthening and toughening effect of rare earth oxide particles, and even directly become the source of pre-cracks during loading

[0004] It can be seen that the current preparation process of rare earth oxide doped molybdenum alloy wire obtained by liquid-solid mixing method is complicated, and the scale of rare earth oxide particles in the obtained molybdenum alloy wire is not easy to control, and it is difficult to obtain uniformly distributed fine rare earth oxide particles, etc. Problems restricting the development and application of high-quality molybdenum wire products