Method of manufacturing small-sized and thin-wall Nb-W-Mo-Zr alloy parts

Abstract

The invention belongs to the technical field of powder metallurgy and relates to a manufacturing method of niobium alloy parts, in particular to a manufacturing method of small-sized and thin-wall Nb-W-Mo-Zr alloy parts. The manufacturing method uses micro spherical Nb-W-Mo-Zr alloy powder which is treated through mechanical alloying and plasma spheroidizing as raw materials, and uses a method of injection molding to prepare a small-sized and thin-wall Nb-W-Mo-Zr alloy part, wherein the alloy part is characterized in that length is smaller than or equal to 30mm, width is smaller than or equal to 5mm, the thickness of thin wall is smaller than or equal to 1mm, dimensional tolerance is smaller than or equal to 0.09%, and a step structure and an arc structure are included in the alloy part. The method of manufacturing small-sized and thin-wall Nb-W-Mo-Zr alloy parts overcomes the defects of a traditional niobium alloy part manufacturing method, for example, stock utilization is low, pollution is serious, complicated shaped parts cannot be manufactured, and production efficiency is low. The method is suitable for manufacturing small-sized and complicated Nb-W-Mo-Zr alloy parts.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy and relates to a method for preparing niobium alloy parts, in particular to a method for preparing small-sized, thin-walled Nb-W-Mo-Zr alloy parts. Background technique [0002] Due to their excellent high-temperature mechanical properties and special physical and chemical properties, niobium-based alloys are widely used in the fields of aerospace, atomic energy and superconductivity, and are considered to be the most promising structural materials that can be applied in high-temperature environments above 1500K. Nb-W-Mo-Zr alloy, as the mainstream niobium alloy structural material used in my country's aerospace industry, is widely used in the manufacture of rocket engine nozzles, combustion chambers, missile empennages and other parts. [0003] At present, the vast majority of niobium alloys are prepared by traditional processes, including smelting, casting, pressure processing, welding...

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Problems solved by technology

[0003] At present, the vast majority of niobium alloys are prepared by traditional processes, including smelting, casting, pressure processing, welding and many other processes, which have disadvantages such as low material utilization rate, large pollution, difficulty in preparing parts with complex shapes, and low production efficiency.

Especially for small-sized niobium alloy parts with a size of only 10-30mm, a wall thickness of less than 1mm, and complex structures such as blind holes, steps, grooves, and arcs, the preparation of traditional processing methods is very difficult

Although the particle size of the powder produced by this method is small, the shape is not spherical and the fluidity is poor, so it is not suitable for the preparation of fine and thin-walled parts for injection molding

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