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Low-cost titanium alloy indirect additive manufacturing method

A technology of additive manufacturing and titanium alloy, which is applied in the field of additive manufacturing, can solve the problems of difficult to obtain titanium alloy parts with ideal mechanical properties, irregular shape, and difficulty in forming, so as to achieve good quality of printed products, low cost of printing equipment, and improved Yield Effect

Pending Publication Date: 2020-06-30
苏勇君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spherical powder processed by plasma, electron beam, gas atomization, etc., although the quality is ideal, but the price is high, and the cost of titanium alloy powder with irregular shape can be reduced to less than one-fifth of the spherical powder. The only disadvantage is that There are unfavorable factors such as high oxygen impurities, irregular shape and difficult forming, and it is not easy to obtain titanium alloy parts with ideal mechanical properties

Method used

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  • Low-cost titanium alloy indirect additive manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, the method of indirectly printing titanium alloy parts with spherical titanium powder mixed with hydrogenated dehydrogenated titanium powder and added with rare earth yttrium powder:

[0031] Put the spherical pure titanium powder accounting for 50% of the total weight of the mixed powder, the hydrogenated dehydrogenation titanium powder accounting for 49.8% of the total weight of the mixed powder, the yttrium element powder accounting for 0.2% of the total weight of the mixed powder and the binder accounting for 25% of the total volume of the feed. Put it into a Sigma powder mixer, stir and mix for 2 hours at a temperature of 110°C, and the binder is made of the following raw materials in parts by weight: 45 parts of polyethylene polymer, 45 parts of paraffin, and 4 parts of stearic acid; then use granulation The machine prepares a granular feed with a diameter of less than 5mm; using an injection machine, manufactures an indirect additive manufacturing wi...

Embodiment 2

[0032] Embodiment 2, the method of indirectly printing titanium alloy parts with low-cost hydrogenated dehydrogenation titanium alloy powder mixed with other metal powders:

[0033] Accounting for 94.5% of the total weight of the mixed powder TC4 (Ti-6Al-4V) titanium alloy powder, conventional 316L stainless steel powder accounting for 5% of the total weight of the mixed powder and 0.5% of the yttrium element powder and accounting for the total weight of the mixed powder The binder with 36% of the total volume of the material was put into a Sigma powder mixer, and mixed and stirred for 4 hours at a temperature of 150°C. The binder was made of the following raw materials in parts by weight: 47 parts of polyethylene polymer, 48 parts of paraffin, 5 parts of stearic acid; the use of 316L stainless steel powder is beneficial to the sintering and densification of titanium alloy parts, and it is a sintering auxiliary agent. Then use a granulator to prepare granular feed with a diame...

Embodiment 3

[0034] Embodiment 3, the method of indirectly printing titanium alloy parts with low-cost hydrogenated dehydrogenation titanium alloy powder mixed with spherical titanium alloy powder:

[0035]Accounting for 83.2% of the total weight of the mixed powder TC4 (Ti-6Al-4V) titanium alloy powder, accounting for 15% of the total weight of the mixed powder atomized spherical Ti-6Al-4V titanium alloy powder, accounting for 1.8% of the total weight of the mixed powder Put the yttrium element powder and the binder accounting for 45% of the total volume of the feed into the Sigma powder mixer, and mix and stir for 6 hours at a temperature of 170 ° C. The binder is made of the following raw materials in parts by weight: polyethylene polymer 55 Parts, 55 parts of paraffin, 5 parts of stearic acid; the use of 15wt.% spherical titanium alloy powder is beneficial to increase the loading of metal powder in granular feed and wire, and promote the sintering and densification of titanium alloy par...

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Abstract

The invention discloses a low-cost titanium alloy indirect additive manufacturing method. The method comprises the following steps that spherical powder and / or doped irregularly shaped titanium or titanium alloy powder and an adhesive are fully mixed, stirred and heated, wherein the powder contains yttrium accounting for 0.2-1.8% of the total weight of the mixed powder, the addition amount of theadhesive accounts for 25-45% of the total volume of the mixed powder, and the adhesive is prepared from, by weight, 45-55 parts of polyethylene macromolecules, 45 -55 parts of paraffin and 4-5 parts of stearic acid; the mixed powder is prepared into granular feed through a granulator, and an injection molding machine is used for processing the granular feed into aluminum alloy wires; the titaniumalloy wires are loaded on a conventional plastic 3D printer, and a titanium alloy green body is printed; the green body is put into a solvent degreasing device or a container for degreasing, and the adhesive is removed; and by means of a high-temperature pressureless sintering method, the aluminum alloy green body is solidified to obtain a highly dense titanium alloy indirect printing finished product. The method has the beneficial effects of being low in material cost, low in printing equipment cost and good in printed product quality.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a low-cost titanium alloy indirect additive manufacturing method. Background technique [0002] Titanium alloy is an important lightweight structural material with high specific strength, specific stiffness, good toughness and fatigue properties, high damage tolerance capability, excellent chemical corrosion resistance and good biocompatibility, so it is widely used In aviation, spaceflight, navigation, biomedicine, land transportation and other fields. Many countries in the world have recognized the importance of titanium alloy materials, researched and developed them one after another, and obtained practical applications. [0003] In the field of powder metallurgy, additive manufacturing technology (also known as 3D printing), as an advanced material processing method, can manufacture titanium alloy parts with complex structures in near net shape. ...

Claims

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Application Information

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IPC IPC(8): B22F3/22B22F3/10B22F1/00B33Y10/00B33Y70/10
CPCB22F3/225B22F3/1025B33Y10/00B33Y70/00B22F1/103B22F1/10
Inventor 苏勇君唐迎春李正平
Owner 苏勇君
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