CN-116748327-B - Preparation method of TA18 titanium alloy ultrafine wire

CN116748327BCN 116748327 BCN116748327 BCN 116748327BCN-116748327-B

Abstract

The invention relates to a preparation method of a TA18 titanium alloy ultrafine wire, which comprises the steps of firstly obtaining a target TA18 titanium alloy wire blank, then coiling the target TA18 titanium alloy wire blank, carrying out temperature-controlled vacuum annealing, carrying out cold drawing on the target TA18 titanium alloy wire blank at least once, carrying out on-line temperature-controlled atmosphere annealing treatment after cold drawing each time, obtaining a final annealed wire blank with the diameter smaller than or equal to the target diameter after the last on-line temperature-controlled atmosphere annealing treatment, and carrying out on-line pickling treatment on the final annealed wire blank to obtain the TA18 titanium alloy ultrafine wire. The TA18 titanium alloy superfine wire prepared by the method has low impurity content, better surface quality and dimensional tolerance and better straightness.

Inventors

YE JUNJIE
WEN NA
ZHAO FENFEN
CHEN XI
LI FUQIANG
YANG XIAOKANG
LI GUILI
LIU CHUNYU

Assignees

西安思维智能材料有限公司

Dates

Publication Date: 20260512
Application Date: 20230721

Claims (7)

1. A method for preparing a TA18 titanium alloy superfine wire, which is characterized by comprising the following steps: Obtaining a target TA18 titanium alloy wire blank, wherein the surface of the target TA18 titanium alloy wire blank is a bright surface, and the diameter of the target TA18 titanium alloy wire blank is 1.2 mm-1.0 mm; coiling the target TA18 titanium alloy wire blank, and then carrying out temperature-controlled vacuum annealing; carrying out at least one cold drawing on the target TA18 titanium alloy wire blank, carrying out on-line temperature control atmosphere annealing treatment after each cold drawing, and obtaining a final annealed wire blank with the diameter smaller than or equal to a target diameter after the last on-line temperature control atmosphere annealing treatment, wherein the target diameter is smaller than or equal to 1mm; The method comprises the steps that a wire drawing die set consisting of a plurality of wire drawing dies with different die hole diameters is used during cold drawing, the wire drawing dies in the wire drawing die set are connected in series, the die hole diameters of the wire drawing dies from one wire inlet end to one wire outlet end in the wire drawing die set decrease according to deformation amounts of 7% -9%, the total deformation amount of the wire drawing die set is 25% -45%, and when the cold drawing times are multiple, the die hole diameter of the wire drawing die at one wire inlet end in the wire drawing die set used during the next cold drawing is smaller than the die hole diameter of the wire drawing die at one wire outlet end in the wire drawing die set used during the previous cold drawing, or the number of the wire drawing dies in the wire drawing die set during the next cold drawing is larger than the number of the wire drawing dies in the wire drawing die set during the previous cold drawing; carrying out on-line acid washing treatment on the final annealed wire blank to obtain a TA18 titanium alloy superfine wire; Carrying out N times of cold drawing on the target TA18 titanium alloy wire blank, obtaining an intermediate drawing wire blank after the former N-1 times of cold drawing, carrying out intermediate online temperature control atmosphere annealing treatment on the intermediate drawing wire blank to obtain an intermediate annealing wire blank, obtaining a final drawing wire blank after the last time of cold drawing, and carrying out final online temperature control atmosphere annealing treatment on the final drawing wire blank to obtain a final annealing wire blank, wherein N is more than or equal to 2; The annealing temperature is 600-800 ℃ during on-line temperature control atmosphere annealing, the heat preservation time is 20-60 s, the atmosphere is inert gas, the atmosphere flow is 5L-10L/min, and the gas leakage rate is less than 2L/min; The intermediate online temperature control atmosphere annealing parameters of the intermediate drawn wire billets with different diameters are different, and specifically: when the diameter of the intermediate drawn wire blank is 1.0 mm-0.8 mm, the intermediate on-line temperature control atmosphere annealing temperature is 800 ℃, and the heat preservation time is 60s; When the diameter of the intermediate drawing state wire billet is 0.6 mm-0.8 mm, the intermediate on-line temperature control atmosphere annealing temperature is 750 ℃, and the heat preservation time is 50s; When the diameter of the intermediate drawing state wire billet is 0.4 mm-0.6 mm, the intermediate on-line temperature control atmosphere annealing temperature is 700 ℃, and the heat preservation time is 40s; when the diameter of the intermediate drawing state wire billet is 0.2 mm-0.4 mm, the intermediate online temperature control atmosphere annealing temperature is 650 ℃, and the heat preservation time is 30s; When the diameter of the intermediate drawing state wire billet is below 0.2mm, the intermediate on-line temperature control atmosphere annealing temperature is 600 ℃, and the heat preservation time is 20s.
2. The method for producing TA18 titanium alloy superfine wire according to claim 1, wherein the final annealed wire rod is subjected to an on-line pickling treatment by sequentially placing the final annealed wire rod into a pickling tank, a water tank and a drying chamber.
3. The method for preparing the TA18 titanium alloy ultrafine wire according to claim 2, wherein the coiled target TA18 titanium alloy wire blank is subjected to temperature-controlled vacuum annealing in a vacuum annealing furnace, the annealing temperature during the temperature-controlled vacuum annealing is 700-850 ℃, the heat preservation time is 1-3 h, and the vacuum degree is less than 2.0X10 -3 Pa.
4. The preparation method of the TA18 titanium alloy ultrafine wire according to claim 2, wherein the pickling solution of the pickling tank comprises the following components in parts by volume of HF, HNO 3 ：H 2 O=2-3:3-4:5-3; and placing the final annealed wire blank into an acid pickling tank for 10-50 s, wherein the temperature of the drying chamber is 50-100 ℃.
5. The method for producing a TA18 titanium alloy ultrafine wire according to claim 4, wherein a lubricant is sprayed on the wire drawing die set at the time of cold drawing, the lubricant is titanium alloy wire drawing oil, and the wire drawing die is a diamond wire drawing die.
6. The method for preparing the TA18 titanium alloy ultrafine wire according to claim 1, wherein the final on-line controlled-temperature atmosphere annealing parameters of the final drawn wire billets with different diameters are different, specifically: When the diameter of the final drawn wire blank is 1.0 mm-0.8 mm, the on-line temperature control atmosphere annealing temperature is 750 ℃, and the heat preservation time is 40s; when the diameter of the final drawn wire blank is 0.6-0.8 mm, the on-line temperature control atmosphere annealing temperature is 740 ℃, and the heat preservation time is 40s; When the diameter of the final drawn wire blank is 0.4-0.6 mm, the on-line temperature control atmosphere annealing temperature is 730 ℃, and the heat preservation time is 30s; when the diameter of the final drawn wire blank is 0.2 mm-0.4 mm, the on-line temperature control atmosphere annealing temperature is 720 ℃, and the heat preservation time is 30s; When the diameter of the final drawn wire billet is below 0.2mm, the on-line temperature control atmosphere annealing temperature is 700 ℃, and the heat preservation time is 20s.
7. The method for preparing the TA18 titanium alloy ultrafine wire according to claim 4, wherein the final annealed wire blanks with different diameters are placed in the pickling bath for different times, specifically: When the diameter of the final annealed silk blank is 1.0 mm-0.8 mm, the time length of placing the silk blank into an acid washing tank is 50s; when the diameter of the final annealed wire blank is 0.6 mm-0.8 mm, the wire blank is placed into an acid washing tank for 40s; when the diameter of the final annealed wire blank is 0.4-0.6 mm, the wire blank is placed into an acid washing tank for 30s; When the diameter of the final annealed wire blank is 0.2 mm-0.4 mm, the wire blank is placed into an acid washing tank for 20s; and when the diameter of the final annealed silk blank is below 0.2mm, the time period of placing the silk blank into an acid washing tank is 10s.

Description

Preparation method of TA18 titanium alloy ultrafine wire Technical Field The invention relates to the technical field of titanium alloy wire processing, in particular to a preparation method of a TA18 titanium alloy ultrafine wire. Background The TA18 titanium alloy is near alpha titanium alloy, has the nominal component of Ti-3Al-2.5V, has good cold formability, corrosion resistance and biocompatibility, has strength 20% -50% higher than that of industrial pure titanium at room temperature, and has excellent comprehensive performance. The TA18 titanium alloy ultrafine wire can be used for processing products such as staples in the medical field, and the requirements on the TA18 ultrafine wire are high when the products such as the staples are processed, so that the TA18 ultrafine wire is required to meet good chemical properties and mechanical properties. However, when the TA18 titanium alloy is used for preparing the ultrafine wire below 1mm, the material is seriously processed and hardened due to the fact that the process is carried out by multiple drawing, and the process is carried out after continuous pass annealing, so that the TA18 ultrafine wire is extremely easy to increase oxygen and hydrogen in the annealing process, the impurity element content exceeds the standard, and the mechanical property of the TA18 ultrafine wire is greatly influenced by the impurity element. And because TA18 has excellent plasticity, when the TA18 is processed into ultra-fine wires with the diameter of less than 1mm and then subjected to surface treatment, the TA18 is polished by a mechanical method, so that wire bending and uneven size are easily caused, and the processing of products such as follow-up staples and the like is not facilitated. Disclosure of Invention Based on the above, it is necessary to provide a method for preparing a TA18 titanium alloy ultrafine wire, wherein the prepared TA18 titanium alloy ultrafine wire has low impurity content and excellent surface quality and dimensional tolerance. The invention provides a preparation method of a TA18 titanium alloy ultrafine wire, which comprises the following steps: Obtaining a target TA18 titanium alloy wire blank, wherein the surface of the target TA18 titanium alloy wire blank is a bright surface, and the diameter of the target TA18 titanium alloy wire blank is 1.2 mm-1.0 mm; Coiling a target TA18 titanium alloy wire blank, and then carrying out temperature-controlled vacuum annealing; Carrying out at least one cold drawing on a target TA18 titanium alloy wire blank, carrying out on-line temperature control atmosphere annealing treatment after each cold drawing, and obtaining a final annealed wire blank with the diameter smaller than or equal to the target diameter after the last on-line temperature control atmosphere annealing treatment, wherein the target diameter is smaller than or equal to 1mm; The method comprises the steps that a wire drawing die set consisting of a plurality of wire drawing dies with different die hole diameters is used during cold drawing, the wire drawing dies in the wire drawing die set are connected in series, the die hole diameters of the wire drawing dies from one wire inlet end to one wire outlet end in the wire drawing die set decrease according to deformation amounts of 7% -9%, the total deformation amount of the wire drawing die set is 25% -45%, and when the cold drawing times are multiple, the die hole diameters of the wire drawing dies at one wire inlet end in the wire drawing die set used during the next cold drawing are smaller than the die hole diameters of the wire drawing dies at one wire outlet end in the wire drawing die set used during the previous cold drawing, or the number of the wire drawing dies in the wire drawing die set during the next cold drawing is larger than the number of the wire drawing dies in the wire drawing die set during the previous cold drawing; And carrying out on-line acid washing treatment on the final annealed wire blank to obtain the TA18 titanium alloy superfine wire. In one embodiment, the target TA18 titanium alloy wire blank is subjected to N times of cold drawing, the intermediate drawing wire blank is obtained after the first N-1 times of cold drawing, the intermediate annealing wire blank is obtained after the intermediate on-line temperature controlled atmosphere annealing treatment is performed on the intermediate drawing wire blank, the final drawing wire blank is obtained after the last time of cold drawing, the final on-line temperature controlled atmosphere annealing treatment is performed on the final drawing wire blank, and the final annealing wire blank is obtained, wherein N is more than or equal to 2. In one embodiment, the final annealed wire rope is subjected to an on-line pickling process in which the final annealed wire rope is sequentially placed in a pickling tank, a water tank and a drying chamber. In one embodiment, the coiled target TA18 titanium alloy wire b