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Near-beta titanium alloy with low elastic modulus and high strength and preparation method of near-beta titanium alloy

A β-titanium alloy, high-purity technology, applied in the field of titanium alloys, can solve the problems of difficult control of metallurgical quality of ingots, inability to meet low modulus, high strength, and increased preparation costs at the same time

Inactive Publication Date: 2013-04-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the new β-type medical titanium alloy has solved the problems of α+β-type titanium alloy as an implant material to a certain extent, there are still deficiencies: (1) The elastic modulus of the above alloy is greater than 60GPa under solid solution conditions, and the aging The elastic modulus after treatment is about 90GPa, and it cannot meet the requirements of low modulus and high strength at the same time under specific treatment conditions; (2) Many alloys contain refractory metal tantalum, which makes it difficult to control the metallurgical quality of ingots. The cost of preparation increases

Method used

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  • Near-beta titanium alloy with low elastic modulus and high strength and preparation method of near-beta titanium alloy
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  • Near-beta titanium alloy with low elastic modulus and high strength and preparation method of near-beta titanium alloy

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preparation example Construction

[0042] The method for preparing the low elastic modulus and high strength near-β titanium alloy according to an embodiment of the present invention includes a vacuum melting step and a thermomechanical treatment step. The vacuum smelting step includes: high-purity titanium (Ti), niobium (Nb), molybdenum (Mo) and tin (Sn) metals and titanium dioxide (TiO 2) powder is prepared according to the ratio of 15-35% niobium, 1-8% molybdenum, 1-8% tin, 0-1.2% titanium dioxide powder, and the rest is titanium, and the prepared raw materials are placed in In a magnetically stirred vacuum non-consumable electric arc furnace, the ingot is repeatedly turned and smelted under the condition of an inert gas protective atmosphere, and the ingot is formed after solidification; the so-called thermomechanical treatment steps include: hot forging the ingot to a predetermined thickness; sealing the forged ingot In the quartz tube, after vacuuming the quartz tube, seal the quartz tube, put the sealed ...

Embodiment 1

[0051] Get the composition described in Table 1, high-purity titanium (Ti), niobium (Nb), molybdenum (Mo) and tin (Sn) metal are based on the niobium of 15~35% by weight, the molybdenum of 1~8%, 1~ The ratio of 8% tin and the rest is titanium, and the prepared raw materials are placed in a magnetically stirred vacuum non-consumable electric arc furnace, repeatedly turned and smelted under the condition of an inert gas protective atmosphere, and formed into an ingot after solidification; Hot forge the ingot to a thickness of 5mm; seal the forged ingot in a quartz tube, vacuumize the quartz tube and seal the quartz tube, put the sealed quartz tube into a heat treatment furnace to heat up to a temperature range of 900°C After 5 hours of internal heat preservation, the quartz tube is taken out, the quartz tube is crushed, and the spindle is directly dropped into water for water cooling, and the homogenized annealed spindle is cold-rolled into a 1mm thick plate (referred to as cold-...

Embodiment 2

[0059] The difference from Example 1 is that this example studies the influence of the alloy phase composition on the mechanical properties of the alloy, and characterizes the phase composition characteristics of the low modulus and high strength titanium alloy.

[0060] Get the composition described in Table 2, high-purity titanium (Ti), niobium (Nb), molybdenum (Mo) and tin (Sn) metal are based on the niobium of 15~35% by weight, the molybdenum of 1~8%, 1~ The ratio of 8% tin and the rest is titanium, and the prepared raw materials are placed in a magnetically stirred vacuum non-consumable electric arc furnace, repeatedly turned and smelted under the condition of an inert gas protective atmosphere, and formed into an ingot after solidification; Hot forge the ingot to a thickness of 4mm; seal the forged ingot in a quartz tube, vacuumize the quartz tube and seal the quartz tube, put the sealed quartz tube into a heat treatment furnace to heat up to a temperature range of 850°C ...

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Abstract

The invention provides a Ti-Nb-Mo-Sn near-beta titanium alloy with low elastic modulus and high strength. The alloy comprises the following chemical components in percentage by weight: 15-35% of niobium, 1-8% of molybdenum, 1-8% of stannum and 0-1.2% of titanium dioxide powder. The Ti-Nb-Mo-Sn near-beta titanium alloy with low elastic modulus and high strength has the beneficial effects that the systemic alloy has good cold machining performance and a low machining cementation index and can coldly deform in a large scale by using cold machining processes such as cold rolling, cold wire drawing and the like; the systemic alloy has the characteristic of nonlinear deformation after being thermally machined or coldly machined and has large restorable elastic strain, low initial modulus and average modulus and high strength; the systemic alloy has low elastic modulus, high yield strength and breaking strength and high linear elasticity after being smelted, thermally machined or coldly machined and thermally treated; and the systemic alloy can be used for preparing medical equipment, physical training equipment and industrial equipment, and can be used for biomedical applications such as artificial bones, bone joints, implanted tooth roots, bony plates and the like.

Description

technical field [0001] The invention relates to the technical field of titanium alloys, in particular to a low elastic modulus, high-strength near-β titanium alloy and a preparation method thereof, in particular to titanium alloys with low elastic modulus and high strength for medical, sports and industrial applications. -Nb-Mo-Sn alloy. Background technique [0002] Compared with traditional stainless steel and cobalt-based alloys, titanium and its alloys have lower density and elastic modulus, higher strength, specific strength, and good biocompatibility and corrosion resistance, so they are widely used in clinical medicine. more and more widely applied. At present, the medical titanium alloys used in clinical medicine are mainly α+β type Ti-6Al-4V and Ti-6Al-7Nb. Compared with traditional stainless steel and cobalt-based alloys, although the lower elastic modulus of Ti-6Al-4V and Ti-6Al-7Nb (about half of that of stainless steel and cobalt-based alloys) to a certain ext...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22F1/18
Inventor 郭顺包甄珍赵新青
Owner BEIHANG UNIV
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