Ultrafine grain titanium wire and post-processing method thereof

Through pre-stretching treatment and two vertical ultrasonic treatments, the problem of high dislocation density of ultrafine crystal titanium wire is solved, which significantly improves its elongation and retaining strength and does not decrease. The processing process is carried out at room temperature, avoiding changes in the grain size of the material and the reduction in shape accuracy.

CN119710510APending Publication Date: 2025-03-28HEFEI BOYA MAITE BIOMATERIALS CO LTD
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Patent Information

Application Number
CN202411928057.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art is difficult to improve its comprehensive performance while reducing the dislocation density of ultrafine crystal titanium wire, and heat treatment methods tend to lead to a decrease in material dimensional accuracy and strength.

Method used

The pre-stretching treatment and two-sonic treatment methods are adopted to reduce the dislocations generated during large plastic deformation by pre-stretching treatment, and then the dislocation density is further reduced by two-perpendicular ultrasonic treatments.

Benefits of technology

The dislocation density of ultrafine crystal titanium wire is significantly reduced, while improving its elongation and maintaining strength are not reduced. The processing process is carried out at room temperature, avoiding changes in the material grain size and reduced shape accuracy.

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Abstract

The invention provides an ultra-fine grain titanium wire and a post-processing method thereof, and relates to the technical field of medical materials, the method is used for reducing the dislocation density of the ultra-fine grain titanium wire, and the method comprises the steps that an original ultra-fine grain titanium wire prepared through a severe plastic deformation method is obtained; the original ultra-fine grain titanium wire is fixed to a stretching device to be subjected to pre-stretching treatment; the ultra-fine grain titanium wire subjected to pre-stretching treatment is placed in an ultrasonic treatment device to be subjected to first-time ultrasonic treatment; and the ultra-fine grain titanium wire obtained after first-time ultrasonic treatment is placed in an ultrasonic treatment device to be subjected to second-time ultrasonic treatment, and the ultra-fine grain titanium wire is obtained. According to the method, the dislocation density of the ultra-fine grain titanium wire material can be remarkably reduced, meanwhile, the tensile strength and the ductility of the material are improved, the material has the low elastic modulus, the stress shielding effect of an implant can be reduced, the implant can be matched with the elastic modulus between bones, and the effectiveness of the implant is improved.
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