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A kind of 3D printing manufacturing method and application of metal tantalum

A 3D printing and manufacturing method technology, applied in the field of additive manufacturing, can solve the problems of high melting point of tantalum, poor comprehensive mechanics such as tensile strength, yield strength elongation, low density, etc., and achieve high purity, excellent flow performance, The effect of regular shapes

Active Publication Date: 2020-04-10
GUANGDONG INST OF NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high melting point of tantalum, it is difficult to form by conventional processing methods, and it is expensive, which largely limits its application in biomedical and other fields.
At present, there are few reports on the exploratory research on metal tantalum 3D printing process, and using chemical tantalum powder such as hydrodehydrogenation and sodium reduction as raw materials, 3D printing metal tantalum has low density, comprehensive mechanical properties such as tensile strength, yield strength and elongation. Bad question

Method used

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  • A kind of 3D printing manufacturing method and application of metal tantalum
  • A kind of 3D printing manufacturing method and application of metal tantalum
  • A kind of 3D printing manufacturing method and application of metal tantalum

Examples

Experimental program
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Embodiment 1

[0032] This embodiment provides a 3D printing manufacturing method for metal tantalum, including:

[0033] Preparation of spherical tantalum powder for 3D printing.

[0034] Place the irregular sodium-reduced tantalum powder in a vacuum drying oven for 3 hours and vacuum-dry at a drying temperature of 80-100°C.

[0035] Use a 200-mesh manual sieving machine to sieve the dried powder, and take the sieved material to obtain -200-mesh sodium-reduced tantalum powder, and put it into the powder delivery system of the radio frequency plasma spheroidization equipment.

[0036] Set up a stable running argon or argon / helium plasma torch. Input a certain amount of argon or argon / helium continuous gas flow into the plasma reactor, apply a high voltage to the radio frequency induction coil, the voltage is 6~8kV, and start arc discharge at the same time, so that the argon or argon / helium ionization produces Argon plasma torch. At this time, a certain pressure normal balance is maintaine...

Embodiment 2

[0043] This embodiment provides a 3D printing manufacturing method for metal tantalum, which differs from Embodiment 1 in that:

[0044] Scanning power 200W, laser energy density 192.31J / mm 3 , the others are the same as in Example 1, carry out selective laser melting 3D printing, and finally obtain 3D printed metal tantalum.

Embodiment 3

[0046] This embodiment provides a 3D printing manufacturing method for metal tantalum, which differs from Embodiment 1 in that:

[0047] Scanning power 240W, laser energy density 230.77J / mm 3 , the others are the same as in Example 1, carry out selective laser melting 3D printing, and finally obtain 3D printed metal tantalum.

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Abstract

The invention relates to a 3D printing manufacturing method and application of metal tantalum, belonging to the technical field of additive manufacturing. A 3D printing manufacturing method for metal tantalum, comprising: loading spherical tantalum powder into 3D printing forming equipment, using argon gas to purge the 3D printing forming equipment until the oxygen content in the 3D printing forming equipment is less than 100ppm, at a temperature of 90~ The TC4 titanium alloy substrate was preheated at 150°C, and the angle between the scanning layers was 67°, and the 3D printing was carried out. The raw material tantalum powder used in this manufacturing method is spherical, has high purity, low oxygen content, and excellent fluidity. The surface roughness of the metal tantalum prepared by 3D printing is R a ≤5.0μm, density ρ≥99.8%, tensile strength σ b =697MPa, yield strength σ 0.2 =581MPa, elongation δ=27.5%, which can meet the performance index requirements of ISO13782 biomedical surgical implants.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, and in particular to a 3D printing manufacturing method and application of metal tantalum. Background technique [0002] Metal materials for orthopedic implants in the biomedical field mainly include stainless steel, cobalt-chromium alloys, titanium and titanium alloys. Stainless steel, which was first used in clinical practice, will undergo frictional corrosion under the action of physiological environment, resulting in loosening and failure of implants. Although cobalt-chromium alloys and titanium alloys have excellent corrosion resistance, they will slowly release toxic elements or chromium, vanadium, aluminum and other elements that can cause neurological disorders and osteomalacia during service, and there are problems such as "stress shielding", which restricts Clinical development and application prospects of materials. Tantalum has outstanding biocompatibility, low elasti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/06B22F3/105B33Y10/00B33Y70/00
CPCB22F9/06B33Y10/00B33Y70/00B22F10/00B22F1/065B22F10/32B22F10/34B22F10/36B22F10/28Y02P10/25
Inventor 毛新华刘辛谢焕文
Owner GUANGDONG INST OF NEW MATERIALS