COSOIU MARIAN,COSOIU MARIAN,BOCA NICOLAE,BOCA NICOLAE
申请号：
RO201400944
公开号：
RO131226A2
申请日:
2014.12.03
申请国别(地区):
RO
年份:
2016
代理人:
摘要：
The invention relates to a Ti-based alloy with superelastic properties used for manufacturing load-bearing implants and also to a process for producing the same. The claimed bioalloy belongs to the system TiNbZrTaO and has the following chemical composition expressed in mass percentage: 55.84% Ti, 36.5% Nb, 4.5% Zr, 3% Ta, 0.16% O, with controlled oxygen content, having, when cast, a modulus of elasticity of 58 GPa and a mechanical resistance of 670 MPa. The claimed process comprises the following steps: preparing and dosing the raw materials forming the composition of the alloy, namely: Ti sponge, thin Nb sheets with a thickness of maximum 1 mm, Zr rods or sponge, thin rod of Ti - 60 Ta pre-alloy and pigment of Ti, preparing a cylindrical consumable electrode by pressing in portions, reinforcing the electrode obtained by welding on the generatrix, in a plasma welding installation in a vacuum enclosure, melting the electrode in a vacuum arc furnace, preparing a cylindrical first-melt ingot with a diameter larger than the diameter of the pressed electrode, cutting the shrinkage cavity, remelting the first-melt electrode in order to improve its chemical and structural homogeneity, pouring the charge and obtaining a second cylindrical ingot, cutting the shrinkage cavity thereof, peeling the second-melt ingot on the generatrix up to the clean material, taking samples for chemical analysis and carrying out an ultrasonic control in order to detect structural defects.Invenţia se referă la un bioaliaj pe bază de Ti, cu proprietăţi superelastice, utilizat la realizarea implanturilor portante, precum şi la un procedeu de obţinere a acestora. Bioaliajul conform invenţiei face parte din sistemul TiNbZrTaO şi are următoarea compoziţie chimică, exprimată în procente masice: 55,84% Ti, 36,5%Nb, 4,5% Zr, 3% Ta, 0,16% O, cu conţinutul de oxigen controlat, având în stare turnată un modul de elasticitate de 58 GPa şi o rezistenţa mecanică de 670 MPa. Procedeul conform invenţiei cuprin
