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Preparation method for high-performance low-modulus medical titanium alloy three-dimensional metal part

A technology for metal parts and titanium alloys is applied in the field of preparation of high-performance and low-modulus medical titanium alloy three-dimensional metal parts, achieving the effects of broad application prospects, fully controllable internal structure and high production efficiency

Active Publication Date: 2017-01-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of this invention is to provide a kind of preparation method of high-performance low-modulus medical titanium alloy three-dimensional metal part, and this method is applicable to Ti-Nb(10-35wt.%)-Zr(0-15wt.%)-Sn, Ta (0-15%) low-modulus medical titanium alloy system, which solves the problem of efficient and rapid preparation of three-dimensional metal parts of low-modulus medical titanium alloy with complex structure, such as: preparation of implants, bone joints, bone plates and other hard tissue implants object parts

Method used

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  • Preparation method for high-performance low-modulus medical titanium alloy three-dimensional metal part
  • Preparation method for high-performance low-modulus medical titanium alloy three-dimensional metal part
  • Preparation method for high-performance low-modulus medical titanium alloy three-dimensional metal part

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Such as figure 1 As shown in (a), CAD software was used to design a low modulus medical titanium alloy acetabular cup model with a wall thickness of 3 mm. Low modulus titanium alloy Ti-24Nb-4Zr-8Sn (wt.%) alloy powder ( figure 2 , powder diameter is 50-80μm) as raw material, using Arcam A1 electron beam melting equipment to prepare Ti-24Nb-4Zr-8Sn alloy acetabular cup model, substrate preheating temperature is 500 ℃, electron beam scanning speed is 500-600mm / s, the electron beam current is 18-25mA, and the component is prepared at a distance of 6mm above the substrate, and the final Ti-24Nb-4Zr-8Sn alloy acetabular cup is as follows: figure 1 (b) shown.

[0044] In this example, the prepared Ti-24Nb-4Zr-8Sn alloy acetabular cup is subjected to hot isostatic pressing, the process is as follows: the temperature is 920° C., the pressure is 120 MPa, and the holding time is 3 hours.

[0045] In this example, the prepared Ti-24Nb-4Zr-8Sn alloy acetabular cup is subjected...

Embodiment 2

[0050] Such as image 3 As shown in (a), the porous material model is designed by using CAD software, and its cell type is a rhombic dodecahedron with a porosity of 80%. Using Ti-24Nb-4Zr-8Sn (wt.%) alloy powder as raw material ( figure 2 , the powder diameter is 50-80 μm), the Ti-24Nb-4Zr-8Sn alloy porous material was prepared by Arcam A1 electron beam melting equipment, the substrate preheating temperature was 500°C, the electron beam scanning speed was 700-800m / s, and the electron beam The current is 1-10mA, and the components are prepared at a distance of 5mm from the substrate. The final Ti-24Nb-4Zr-8Sn alloy porous material is as follows: image 3 (b) shown.

[0051] In this example, the prepared Ti-24Nb-4Zr-8Sn alloy porous material is subjected to two-step heat treatment:

[0052] (1) Solid solution treatment in the β single-phase region. Using a vacuum heat treatment furnace, the prepared Ti-24Nb-4Zr-8Sn alloy porous material was kept at 700°C for 0.5h, and cooled...

Embodiment 3

[0056] Such as Figure 4 As shown in (a), CAD software is used to design the model of the femoral head support nail, and the unit hole type of the porous part is a rhombic dodecahedron with a porosity of 70%. Using Ti-20Nb-5Zr (wt.%) alloy powder as raw material (powder diameter is 40-70 μm), using Arcam A1 electron beam melting equipment to prepare Ti-20Nb-5Zr femoral head support nail, the substrate preheating temperature is 550 °C , the scanning speed of the electron beam is 500-600m / s, the current of the electron beam is 5-15mA, the component is prepared at a distance of 8mm from the substrate, and the finally prepared Ti-22Nb-5Zr alloy femoral head support nail is as follows: Figure 4 (b) shown.

[0057] In this embodiment, the prepared Ti-20Nb-5Zr alloy femoral head support nail is subjected to two-step heat treatment:

[0058] (1) Solid solution treatment in the β single-phase region. Using a vacuum heat treatment furnace, the prepared Ti-20Nb-5Zr alloy femoral head ...

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Abstract

The invention discloses a preparation method for a high-performance low-modulus medical titanium alloy three-dimensional metal part, and belongs to the technical field of electron beam machining. The preparation method is suitable for rapid-forming preparation of a low-modulus medical titanium-alloy-system complex-structure metal part containing 10-35 wt% of Ti-Nb, 0-15 wt% of Zr, and 0-15% of Sn and Ta. The preparation method comprises the steps that firstly, the titanium alloy three-dimensional metal part is prepared through the EBM technique; secondly, hot isostatic pressing treatment is conducted on the prepared three-dimensional part at the temperature of 900-1200 DEG C; and finally, heat treatment is conducted on the titanium alloy part. Through the technological process, the excellent-comprehensive-mechanical-performance low-modulus medical titanium alloy complex-structure three-dimensional part with the compressive strength being 5 MPa or over, the tensile strength being 600 MPa or over, the elasticity modulus being lower than 90 GPa, the ductility being 10% or over and the fatigue strength being 300 MPa or over can be obtained, and the preparation method can be widely applied to the medical field and the like.

Description

[0001] Technical field: [0002] The invention relates to the technical field of electron beam processing, in particular to a method for preparing a three-dimensional metal part of a high-performance low-modulus medical titanium alloy, which is suitable for Ti-Nb (10-35wt.%)-Zr (0-15wt.%) )-Sn, Ta (0-15%) low-modulus medical titanium alloy system for rapid prototyping of various metal parts with complex structures, including solid materials and porous materials. [0003] Background technique: [0004] Titanium alloy has the advantages of high human compatibility, low density, low elastic modulus, high strength, and corrosion resistance to human body fluids. It gradually replaces stainless steel and cobalt-based alloys and becomes a substitute material for hard tissues such as bones and teeth. At present, the medical titanium alloys widely used in clinical medicine are mainly α+β type Ti-6Al-4V and Ti-6Al-7Nb, whose elastic modulus is only half of that of stainless steel and cob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/15C22F1/18C22C14/00B33Y10/00
CPCY02P10/25
Inventor 李述军侯文韬徐勤思赵朔郝玉琳杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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