Additive manufacturing method for thin-wall tubular component

Abstract

The invention discloses an additive manufacturing method for a thin-wall tubular component. The additive manufacturing method comprises the following steps that (1) the surface of a tubular titanium base body is subjected to oil removal, drying and sand blasting treatment; (2) an aluminum / stainless steel composite coating is prepared on the outer wall of the titanium base body to form a titanium-aluminum / stainless steel composite tube base body; (3) metal powder is sprayed on the outer wall of the titanium-aluminum / stainless steel composite tube base body to achieve additive manufacturing of a target coating; (4) the titanium-aluminum / stainless steel-target coating composite tube in the step (3) is soaked in a heated sodium hydroxide aqueous solution, and the tubular component corresponding to the target coating is obtained after electrocorrosion; (5) the tubular component corresponding to the target coating is subjected to heat treatment; and (6) the tubular component corresponding to the target coating is machined, and the needed thin-wall tubular component is obtained finally. The thin wall and the large size of the tubular component can be realized; the technology is simple, the powder utilization rate is high, the machining period is greatly shortened, and the thin-wall tubular component can be rapidly prepared; the internal combination is good, and the strength is high.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to an additive manufacturing method for thin-walled tubular components. Background technique [0002] Tantalum, niobium and their alloy materials (Ta-2.5W, Ta-10W, Ta-8W-2Hf, Ta-40Nb, Nb-30W-1Zr, etc.) have high melting point, excellent corrosion resistance, good thermal shock resistance, creep With the characteristics of high strength, small expansion coefficient, and high ductility, it is widely used in the electronics industry, chemical industry, weapons, aerospace, atomic energy industry, and medical industries. Among them, the consumption of tantalum in the electronics industry and chemical industry accounts for the total amount of tantalum. More than 60%. In the electronic industry and chemical industry, tantalum, niobium and their alloy materials are widely used in the form of tubes to make electron emission tubes, high-power electron tubes, and reaction vessels and hea...

AI Technical Summary

Problems solved by technology

[0005] 1) The overall processing of round rods into tubular components is complicated, the processing cycle is long, and the material waste is large in the process of wire cutting and digging;

[0006] 2) The powder metallurgy process is limited by the size of the compact or sheath and the hot isostatic pressing equipment, and the size and shape of the tubular member will be greatly restricted;

[0007] 3) It is difficult to control the uniform wall thickness of seamless pipes, and it is difficult to produce thin-walled tubular components and large-diameter tubular components;

[0008] 4) The seamed pipe has high requirements on the strip size and the weld strength is not high

These problems greatly limit the promotion and application of tubular components made of tantalum, niobium and their alloys

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