A kind of preparation method of ti-6al-7nb titanium alloy wire for high-performance surgical implantation

Abstract

Provided is a preparation method of Ti-6Al-7Nb titanium alloy wire for high-performance surgical implantation, which belongs to the technical field of titanium alloy wire processing. , wire drawing, vacuum heat treatment, coreless grinding and other process steps, combined with the optimization of process parameters, realize the optimal processing of Ti-6Al-7Nb titanium alloy wire, reduce the risk of product chemical composition qualification rate, easy to wire drawing and forming , The surface roughness is good, which can effectively prevent the occurrence of cracking and rough surface of wire drawing, eliminate the stress generated during the wire drawing process and avoid defects such as surface hydrogen absorption, and improve product quality.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy wire preparation, in particular to a preparation method of a Ti-6Al-7Nb titanium alloy wire for high-performance surgical implantation. Background technique [0002] Metals, ceramics and polymer materials are the three major medical materials today. Titanium alloys have become the first choice for a new generation of medical materials due to their high strength, toughness, corrosion resistance and good biocompatibility. Medical titanium alloys are widely used in artificial joints, oral cavity, etc. Orthopedic products, spinal orthopedic internal fixation systems, and bone trauma products. Medical titanium alloys are mainly Ti-6Al-4V, but V element is harmful to human body. Ti-6Al-7Nb titanium alloy using Nb element instead of V element has been developed and has become the most typical implanted titanium alloy material. However, there are few relevant production standards for this alloy wi...

AI Technical Summary

Problems solved by technology

However, there are few relevant production standards for this alloy wire, and it is difficult to achieve better quality control during processing.

Among them, the invention patent with the patent number CN201510210061.5 discloses a preparation process for medical Ti-6Al-7Nb alloy wire used to manufacture Kirschner wires. Although this patent provides a complete Ti-6Al-7Nb alloy wire However, there are still many defects in the patented technical solution: 1. The patent uses vacuum melting ingots, which are formed into φ80mm rods after billet forging, and processing the rods by itself has a great risk of the qualified rate of the chemical composition of the product; 2. In this patent, the wire drawing heating temperature is 880-920°C. In the α+β phase region, the heating temperature is relatively low, which is prone to cracking and rough wire drawing surface; 3. This patent is annealed after multi-pass wire drawing. Completely eliminate the stress generated in the wire drawing process and surface hydrogen absorption, which will affect the surface roughness after wire drawing; 4. The heat treatment system in this patent is 510~530℃ / 4~8h dispersion strengthening, which is likely to cause surface oxidation of the wire and hydrogen absorption