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Artificial joint

A technology of artificial joints and artificial aging, applied in joint implants, joint implants, etc., can solve the problems of Pb element exceeding the standard, Pb poisoning, artificial joint service life limit, etc., to improve the elastic modulus and improve various performance, strength-enhancing effect

Active Publication Date: 2015-07-01
陕西爱骨医疗股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Biomedical materials in the medical field are routinely used to implant artificial organs in the human body. At present, the demand for artificial joints has increased significantly. Artificial joints are more and more used in the medical field. This type of surgery is becoming more and more mature. However, the strength and elastic modulus of artificial joints are not very high at present, which limits the service life of artificial joints to a certain extent.
At present, zirconium alloys or titanium alloys are routinely used to make artificial joints. Some existing technologies add elements such as Pb to titanium alloys to promote the anode passivation of titanium, thereby improving the corrosion resistance of medical titanium alloys and avoiding crevice corrosion. However, Pb is A heavy metal element that is completely banned in Europe, the United States and Japan. Because it is easy to make the Pb element in the human body exceed the standard in the human body for a long time, it may cause Pb poisoning in the human body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A heat treatment method for an artificial joint. The material of the artificial joint is titanium alloy, and the composition of the titanium alloy is as follows: Al: 4.9%, Ga: 4.1%, V: 4.1%, and the balance is titanium and unavoidable impurities. Including the following steps.

[0036] (1) Raw material preparation and smelting: Sponge titanium is selected as the electrode, and the electrode is welded in a plasma vacuum welding box with a vacuum degree of 3Pa, and the vacuum consumable electric arc furnace is used to melt twice into titanium ingots; the titanium ingots are mixed with Ti-Ga, Ti-Al and Ti-V master alloys are fed into the vacuum melting furnace and melted into a titanium alloy melt with the required composition.

[0037] (2) Precision casting: After heat preservation of the melt obtained in step (1), the semi-finished artificial joint is obtained by precision casting.

[0038] (3) Annealing treatment: Put the semi-finished artificial joint obtained in ste...

Embodiment 2

[0044] A heat treatment method for an artificial joint. The material of the artificial joint is titanium alloy, and the composition of the titanium alloy is as follows: Al: 5.0%, Ga: 2.9%, V: 4.0%, and the balance is titanium and unavoidable impurities.

[0045] Including the following steps:

[0046] (1) Raw material preparation and smelting: Sponge titanium is selected as the electrode, and the electrode is welded in a plasma vacuum welding box with a vacuum degree of 0.8Pa, and the vacuum consumable electric arc furnace is used to melt twice into a titanium ingot; the titanium ingot is mixed with Ti-Ga, Ti-Al and Ti-V master alloys are fed into the vacuum melting furnace and melted into a titanium alloy melt with the required composition.

[0047] (2) Precision casting: After heat preservation of the melt obtained in step (1), the semi-finished artificial joint is obtained by precision casting.

[0048] (3) Annealing treatment: put the artificial joint semi-finished produ...

Embodiment 3

[0054] An artificial joint, which is obtained by the heat treatment method of the artificial joint in Example 1, the material of the artificial joint is titanium alloy, Fe≤0.10%, C≤0.008%, N≤0.005% in the titanium alloy impurities . The tensile strength of the artificial joint is 992MPa, the elongation after forging is 22%, the reduction of area is 46%, and the modulus of elasticity is 68GPa.

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Abstract

The invention relates to an artificial joint. The artificial joint is made from titanium alloy. A preparation method of the artificial joint comprises the following steps: preparing raw materials, smelting, carrying out precision casting, annealing, artificially ageing, carrying out cryogenic treatment, carrying out solution treatment, and artificially ageing for a second time, so that the artificial joint finished product is obtained, and adjusting of titanium alloy composition and the thermal treatment step are matched, so that strength of the artificial joint, elastic modulus and corrosion resistance of the artificial joint are greatly improved.

Description

technical field [0001] The invention belongs to the field of artificial joints and artificial bones, and in particular relates to an artificial joint and a heat treatment method thereof. Background technique [0002] Biomedical materials in the medical field are routinely used to implant artificial organs in the human body. At present, the demand for artificial joints has increased significantly. Artificial joints are more and more used in the medical field. This type of surgery is becoming more and more mature. However, the strength and elastic modulus of artificial joints are not very high at present, which limits the service life of artificial joints to a certain extent. At present, zirconium alloys or titanium alloys are routinely used to make artificial joints. Some existing technologies add elements such as Pb to titanium alloys to promote the anode passivation of titanium, thereby improving the corrosion resistance of medical titanium alloys and avoiding crevice corro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/02C22F1/18A61F2/30
Inventor 张岗
Owner 陕西爱骨医疗股份有限公司
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