Medical used titanium alloy for surgery implantation material

Abstract

The invention discloses an alloy material characterizing in that it is composed of titanium(Ti), niobium(Nb), zirconium(Zr) and palladium(Pd). The weight percentages of the components are as follows: Nb 22-32%, Zr 4-12%, Pd 0.1-0.2%, Ti(the rest). The advantages of the product provided by the invention over the prior part are as follows: 1. favorable biocompatibility 2.low elastic modulus(30%-35%), better biomechanics compatibility 3. favorable comprehensive mechanical properties, wherein, the impact toughness(a#-[k]) is as high as 40%, the endurance limit(ªÊ#-[-1]) is as high as 12%, the fracture toughness(K#-[1]c) is high as 10% 4. better processing properties, the heat processing temperature is as low as 150íµí½200íµ, the expansion rate (ª€)is as high as 30%, the shrinkage rate after cut(ªŽ) is as high as 40%. 5.excellent corrosion proof property: the corrosion velocity is less than 0.0001mm/a in normal saline

Description

Technical field: [0001] The invention relates to a non-ferrous metal material, in particular to a medical titanium alloy for surgical implants with good biological performance, excellent corrosion resistance and good process formability. technical background [0002] Due to the advantages of high specific strength, corrosion resistance, and good biocompatibility, titanium alloys are clinically used as surgical implants such as bone plates, bone screws, orthopedic rods, artificial bones, joint prostheses, and spinal fixation. It is showing a gradual upward trend, but the development history of the titanium industry is short, and there are few varieties of medical titanium alloys. At present, the varieties available for clinical selection are mainly different grades of commercial pure titanium and Ti6Al4V alloys. The strength of pure titanium is low, and it cannot be made into implantable devices with large bearing capacity. Ti6Al4V is transplanted from the aviation industry t...

AI Technical Summary

Problems solved by technology

[0002] Due to the advantages of high specific strength, corrosion resistance, and good biocompatibility, titanium alloys are clinically used as surgical implants such as bone plates, bone screws, orthopedic rods, artificial bones, joint prostheses, and spinal fixation. It is showing a gradual upward trend, but the development history of the titanium industry is short, and there are few varieties of medical titanium alloys. At present, the varieties available for clinical selection are mainly different grades of commercial pure titanium and Ti6Al4V alloys

The strength of pure titanium is low, and it cannot be made into implantable devices with large bearing capacity. Ti6Al4V is transplanted from the aviation industry to medicine. sexual problems

In recent years, two medical titanium alloys, Ti6Al7Nb developed in Sweden and Ti-5Al-2.5Fe developed in Germany, have been used clinically. Except for replacing V with Nb and Fe, other properties are not improved compared with Ti6Al4V alloys.

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