Preparation method of high-performance surgical implantation Ti-6Al-7Nb titanium alloy wire

Abstract

The invention provides a preparation method of a high-performance surgical implantation Ti-6Al-7Nb titanium alloy wire, and belongs to the technical field of titanium alloy wire processing. The preparation method comprises the technological processing steps of bar radial forging, machining rolling, coping, vacuum isothermal treatment, wire drawing, vacuum heat treatment, coreless grinding and the like, and optimization of technological parameters is combined, so that optimal processing of the Ti-6Al-7Nb titanium alloy wire is achieved, the yield risk of chemical components of a product is reduced, wire drawing forming is easy, the surface roughness is good, the phenomena of cracking, rough wire drawing surface and the like can be effectively prevented, stress generated in a wire drawing process is eliminated, the defects of surface hydrogen absorption and the like are avoided, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy wire preparation, and in particular relates to a preparation method of a high-performance Ti-6Al-7Nb titanium alloy wire for 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 Orthopedic products, spinal orthopedic internal fixation systems, and orthopedic trauma products. Medical titanium alloys are mainly Ti-6Al-4V, but V elements are harmful to the human body. Ti-6Al-7Nb titanium alloys using Nb elements instead of V elements have been developed and become the most typical implant titanium alloy materials. However, there are few relevant production standards ...

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