CN111992993A - Preparation method of medical high-strength titanium alloy TC4 bar - Google Patents
Preparation method of medical high-strength titanium alloy TC4 bar Download PDFInfo
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Abstract
A preparation method of a medical high-strength titanium alloy TC4 bar comprises the following steps: preparing a blank, blanking, cogging and forging, drawing, carrying out heat treatment, straightening, polishing, cleaning, inspecting and packaging. The mechanical property of the medical titanium alloy TC4 bar is greatly improved, and the tensile strength of the titanium alloy TC4 bar processed by the method can reach 1200MPa, which is far higher than the national GB/T13810-2007 standard. The metallographic structure was observed to be free of any micro-pore cracks. Has profound significance for wider application of titanium alloy in the medical field.
Description
Technical Field
The invention belongs to the field of metal material processing, and particularly relates to a preparation method of a medical high-strength titanium alloy TC4 bar.
Background
Because of the characteristics of titanium and titanium alloy: light weight, low elastic modulus, no magnetism, no toxicity and corrosion resistance. Titanium alloy materials have become the main raw materials required by the production of various medical apparatus products in the world. The materials for internal fixation and artificial bones and joints in clinical orthopedics department must be selected from materials with high tensile strength, yield strength and fatigue strength, good toughness and extensibility, no toxicity to human bodies, good biological stability and corrosion resistance. The titanium alloy TC4 material has the composition of Ti-6Al-4V, belongs to (alpha + beta) type titanium alloy and has good comprehensive mechanical properties. The preparation of the medical high-strength titanium alloy TC4 bar is particularly important for clinical orthopedics. Micropores are generally generated in the processing of the titanium alloy bar, and can reduce the mechanical property of the titanium alloy, thereby causing great influence on the medical treatment of the titanium alloy. The tensile strength of the titanium alloy TC4 obtained by the existing preparation method of the titanium alloy medical bar is about 1000MPa, and the performance generally can not reach the export standard.
Disclosure of Invention
The invention aims to provide a preparation method of a medical high-strength titanium alloy TC4 bar, which solves the problems that the existing titanium alloy TC4 bar is easy to generate micropores and has low mechanical property.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a preparation method of a medical high-strength titanium alloy TC4 bar comprises the following steps: taking a titanium alloy TC4 ingot as a blank, heating the titanium alloy TC4 ingot to 930-1050 ℃, preserving heat for 3-4 hours, and then carrying out precision forging to obtain a titanium alloy TC4 bar; then putting the titanium alloy TC4 bar into a resistance furnace, heating to 910 ℃, preserving heat for 3 hours, then rolling to the diameter of 10 mm, and ensuring the final rolling temperature to be more than 680-700 ℃ to obtain the titanium alloy TC4 wire; then carrying out coping and multiple reducing drawing, and then carrying out aging heat treatment and straightening treatment.
As a preferred technical scheme, the variable diameter drawing specifically comprises: and (3) passing the titanium alloy TC4 wire through a wire drawing furnace at the temperature of 700-750 ℃, and annealing after multiple times of reducing drawing to obtain the titanium alloy TC4 wire with the diameter of 1.0-5.0 mm.
As a preferred technical solution, the aging heat treatment specifically includes: titanium alloy TC4 wire with the diameter of 1.0-5.0 mm is heated to 500 ℃ and is kept warm for 4 hours.
As a preferred technical solution, the straightening treatment specifically includes: straightening the titanium alloy TC4 wire with the diameter of meter on a slide block straightening machine at the wire feeding speed of 1-4 meters per minute and the straightening frequency of 28.50.
As a preferable technical solution, the straightening process further includes: and cutting the straightened titanium alloy TC4 wire into 3m pieces, polishing the surface by using a centerless grinder, and then cleaning and detecting.
Compared with the prior art, the invention has the beneficial technical effects that:
the method can greatly improve the mechanical property of the medical titanium alloy TC4 bar, and the tensile strength of the titanium alloy TC4 bar processed by the method can reach 1200MPa which is far higher than the national GB/T13810-2007 standard. The metallographic structure was observed to be free of any micropores and cracks. Has profound significance for wider application of titanium alloy in the medical field.
Drawings
FIG. 1 is a 500 times phase diagram of a titanium alloy TC4 bar prepared according to example 2 of the present invention.
FIG. 2 is a 500 times phase diagram of a titanium alloy TC4 bar prepared according to example 3 of the present invention.
Detailed Description
A preparation method of a medical high-strength titanium alloy TC4 bar comprises the following steps:
step 1: preparing a blank:
selecting a titanium alloy TC4 ingot which conforms to the GB/T13810-2007 standard as a blank.
Step 2: cogging and forging:
and cogging and forging the titanium alloy TC4 cast ingot by adopting a gas furnace, heating the titanium alloy TC4 cast ingot at 1050 ℃, preserving the heat for 3 hours to prepare a square billet with the diameter of 110 mm, and performing finish forging at 930 ℃.
And step 3: rolling:
rolling the prepared titanium alloy TC4 titanium alloy square billet, putting the titanium alloy square billet into a resistance furnace for heating, preserving heat for 3 hours, rolling the titanium alloy square billet into a bar with the diameter of 55 mm, and ensuring the final rolling temperature to be more than 750 ℃. And then putting the bar material with the diameter of 55 mm into a resistance furnace for heating, preserving the heat for 3 hours, and rolling the bar material to the diameter of 10 mm, wherein the final rolling temperature is ensured to be above 700 ℃.
And 4, step 4: drawing:
the titanium alloy TC4 wire is drawn through a wire drawing furnace with the temperature of 740 ℃ and the speed of 1 meter per minute, and the diameter is 10-9.5-9.0-8.5-8-7.5-7 mm. And (3) heat treatment: after 6 times of reducing drawing and annealing, the wire is heated to 750 ℃ and is kept warm for 1 hour. Then drawing is carried out, the temperature of the titanium alloy TC4 wire is 740 ℃, the speed is 1.2 meters per minute, and the diameter is 7-6.6-6.2-5.8-5.5-5.2-5.0 millimeters. After 6 times of variable diameter drawing and annealing, the wire is heated to 700 ℃ and kept for 1 hour. Then cold drawing is carried out, and the diameter is 5.0-1.0 mm.
the titanium alloy TC4 blank is processed by surface pretreatment before drawing, phosphate lubricating coating and oxalate lubricating coating are successfully prepared, the thickness of the phosphate lubricating coating and the thickness of the oxalate lubricating coating reach 2 mu m and 20 mu m respectively, and each coating is combined with the titanium alloy TC4 compactly, thereby providing good carriers for the adhesion of lubricants and simultaneously playing the role of isolating the blank from being in direct contact with a die. Through numerical analysis of cold drawing processing of the titanium alloy TC4, the shape parameters of the cold drawing die for the rod and the wire in a certain size range are determined, and when the working cone angle is 10-12 degrees, the deformation force is in a lower range.
through titanium alloy TC4 cold drawing processing experiments, the oxalate lubricating coating is found to have better effect, the surface quality of the obtained drawn blank is higher, the total deformation of the blank after four continuous drawing passes reaches 45%, and the requirement of batch production is met. After the titanium alloy TC4 titanium alloy is subjected to cold drawing, the strength is increased, the elongation is reduced, an obvious work hardening effect is generated, and the plasticity of the blank is recovered after annealing treatment without influencing the cold drawing processing of the next pass.
The crystal grain structure of the titanium alloy TC4 after the titanium alloy cold-drawing annealing is in an equiaxial state, and the equiaxial degree is increased along with the increase of the deformation.
And 5: grinding and peeling:
the surface defects and cracks of the titanium alloy wire can be removed by peeling and polishing the titanium alloy wire for multiple times.
The surface is required to have no processing defects, and the scalping size (mm): phi 9.7-phi 9.2 +/-0.05, phi 6.5-phi 6.1 +/-0.05
Step 6: and (3) heat treatment:
because the processing of the high-strength titanium alloy medical bar has strict requirements on the heat treatment temperature of the titanium alloy wire, for products with different diameters, the corresponding annealing diameter is adopted, and the improvement of the heat treatment process is particularly important for processing the high-strength titanium alloy medical bar.
Common heat treatment methods are annealing, solution and aging. Annealing is performed to eliminate internal stress and improve plasticity and structure stability so as to obtain better comprehensive performance. The annealing temperature of the alpha alloy and the (alpha + beta) alloy is selected to be 120-200 ℃ below the phase transformation point of (alpha + beta) → beta; the solid solution and aging treatment is to obtain martensite alpha' phase and metastable beta phase by fast cooling from a high temperature zone, and then to decompose the metastable phases by keeping the temperature in a middle temperature zone to obtain finely dispersed second phase particles such as alpha phase or compound, thereby achieving the purpose of strengthening the alloy. The quenching of the (alpha + beta) alloy is usually carried out at 40 to 100 ℃ below the (alpha + beta) -phase → beta phase transformation point, and the quenching of the metastable beta alloy is carried out at 40 to 80 ℃ above the (alpha + beta) -phase → beta phase transformation point. The aging treatment temperature is generally 450-550 ℃.
In summary, the heat treatment process of the titanium alloy wire can be summarized as follows:
(1) stress relief annealing: the purpose is to eliminate or reduce residual stress generated during the machining process. Preventing chemical attack and reducing distortion in some corrosive environments.
(2) And (3) complete annealing: the aim is to obtain good toughness, improve the processing performance, facilitate the reprocessing and improve the stability of the size and the structure.
(3) Solution treatment and aging: the aim is that in order to improve the strength, the alpha titanium alloy and the stable beta titanium alloy can not be subjected to strengthening heat treatment, and only annealing is carried out in production. Alpha + beta titanium alloys and metastable beta titanium alloys containing small amounts of alpha phase may be further strengthened by solution treatment and aging.
The 3 annealing modes are combined in the processing of the high-strength medical titanium alloy TC4 wire, and the stress relief annealing and the aging are skillfully applied, so that the mechanical property of the titanium alloy bar is improved.
And 7: straightening:
the titanium alloy TC4 wire material is straightened through a full-automatic straightening and cutting integrated machine. The titanium alloy TC4 wire is placed on a pay-off rack, lubrication is performed before the wire passes through the straightening block, and high-temperature lubricating oil is adopted to lubricate the surface of the wire so as to prevent the surface of the wire from being scratched. The use of lubricating oil of the titanium alloy TC4 wire is particularly noticed, and the straightening distance of the slider is reduced as much as possible on the premise that the straightness of the product reaches the standard. And straightening to obtain a titanium alloy TC4 bar with the length of 3m, and cutting the bar.
And 8: polishing:
the titanium alloy TC4 bar was surface polished. The method comprises the steps of putting a titanium alloy TC4 bar on a feeding frame, starting lubrication, starting hydraulic pressure, starting automatic feeding of a machine, cooling the surface of the bar by using emulsion, starting a guide wheel, starting a grinding wheel, grinding by high-speed rotation of the grinding wheel, and driving a workpiece to rotate at a slower speed in the same direction to perform circumferential feeding. The speed can be faster during rough grinding, and the processing speed of the finish grinding wheel is reduced during finish grinding so that the surface of the finish grinding wheel is smooth and has no scratches.
And step 9: polishing:
the polishing equipment adopts a double-head polishing machine, two groups of superfine polishing belts are installed well, the polishing belts are not adjusted too tightly, the emulsion is adopted to cool the surface, and an abrasive belt is used for polishing the titanium alloy TC4 wire. The choice of polishing belt and polishing speed determine the surface finish of the rod.
Step 10: cleaning:
and (3) putting the processed titanium alloy TC4 bar into an ultrasonic cleaning tank, then putting cleaning liquid, and cleaning by using ultrasonic to remove oil stains on the surface of the titanium alloy TC4 wire.
Step 11: and (4) checking:
the chemical components, mechanical properties, straightness, surface finish degree and the like of the product are tested according to requirements.
Step 12: packaging:
and packaging the product.
Example 1
A preparation method of a medical high-strength titanium alloy TC4 bar comprises the following steps:
preparing a blank: titanium alloy the titanium alloy TC4 ingot was used as a billet. And (3) precision forging: heating the titanium alloy TC4 ingot to 930 ℃, preserving the heat for 4 hours, and then carrying out precision forging. Rolling: and then putting the titanium alloy TC4 bar into a resistance furnace, heating to 910 ℃, preserving heat for 3 hours, preheating a roller, rolling to the diameter of 10 mm, and ensuring the finish rolling temperature to be above 700 ℃. Grinding: the surface of the titanium alloy TC4 wire can not have visible defects such as cracks, folds, oxidation and the like. Drawing: the titanium alloy TC4 wire is drawn at the speed of 1 meter per minute and the diameter of 10-9.5-9.0-8.5-8-7.5-7 mm at the temperature of 740 ℃ in a wire drawing furnace. And (3) heat treatment: after 6 times of reducing drawing and annealing, the wire is heated to 750 ℃ and is kept warm for 1 hour. Then drawing is carried out, the temperature of the titanium alloy TC4 wire is 740 ℃, the speed is 1.2 meters per minute, and the diameter is 7-6.6-6.2-5.8-5.5-5.2-4.9 millimeters. After 6 times of variable diameter drawing and annealing, the wire is heated to 700 ℃ and kept for 1 hour. Then drawing is carried out, and the diameter is 4.9-4.6-4.3-4.0-3.7-3.5-3.2 mm. Aging heat treatment: a titanium alloy TC4 wire having a diameter of 3.2 mm was heated to 500 ℃ and held for 4 hours. Straightening: straightening the titanium alloy TC4 wire with the diameter of 3.2 mm on a slide block straightening machine at the wire feeding speed of 5 m/min and the straightening frequency of 30.00. Cutting into 3m pieces, grinding the surface by a centerless grinder, cleaning and detecting, wherein the tensile strength is 1213MPa, the yield strength is 922 MPa, and micropores and cracks are not formed as shown in figure 1.
Example 2
A preparation method of a medical high-strength titanium alloy TC4 bar comprises the following steps:
preparing a blank: titanium alloy the titanium alloy TC4 ingot was used as a billet. And (3) precision forging: heating the titanium alloy TC4 ingot to 930 ℃, preserving the heat for 4 hours, and then carrying out precision forging. Rolling: and then putting the titanium alloy TC4 bar into a resistance furnace, heating to 910 ℃, preserving heat for 3 hours, preheating a roller, rolling to the diameter of 10 mm, and ensuring the finish rolling temperature to be above 700 ℃. Grinding: the surface of the titanium alloy TC4 wire can not have visible defects such as cracks, folds, oxidation and the like. Drawing: the titanium alloy TC4 wire is drawn at the speed of 1 meter per minute and the diameter of 10-9.5-9.0-8.5-8-7.5-7 mm at the temperature of 740 ℃ in a wire drawing furnace. And (3) heat treatment: after 6 times of reducing drawing and annealing, the wire is heated to 750 ℃ and is kept warm for 1 hour. Then drawing is carried out, the temperature of the titanium alloy TC4 wire is 740 ℃, the speed is 1.2 meters per minute, and the diameter is 7-6.6-6.2-5.8-5.5-5.2-4.9 millimeters. After 6 times of variable diameter drawing and annealing, the wire is heated to 740 ℃ and is kept for 1 hour. Then drawing is carried out, and the diameter is 4.9-4.6-4.3-4.0-3.7-3.5 mm. The wire was heated to 700 ℃ and incubated for 1 hour. Then drawing is carried out, and the diameter is 3.5-3.2-3.0-2.8-2.6-2.4-2.2 mm. Aging heat treatment: a titanium alloy TC4 wire having a diameter of 2.2 mm was heated to 500 ℃ and held for 4 hours. Straightening: straightening a titanium alloy TC4 wire with the diameter of 2.2 mm on a slide block straightening machine at a wire feeding speed of 4 m/min and a straightening frequency of 28.5. Cutting into 3m pieces, polishing the surface by a centerless grinder, cleaning and detecting, wherein the tensile strength is 1222MPa, and the yield strength is 916 MPa. The microstructure was observed without micropores and cracks as shown in fig. 2.
Claims (5)
1. A preparation method of a medical high-strength titanium alloy TC4 bar is characterized by comprising the following steps: taking a titanium alloy TC4 ingot as a blank, heating the titanium alloy TC4 ingot to 930-1050 ℃, preserving heat for 3-4 hours, and then carrying out precision forging to obtain a titanium alloy TC4 bar; then putting the titanium alloy TC4 bar into a resistance furnace, heating to 910 ℃, preserving heat for 3 hours, then rolling to the diameter of 10 mm, and ensuring the final rolling temperature to be more than 680-700 ℃ to obtain the titanium alloy TC4 wire; then carrying out coping and multiple reducing drawing, and then carrying out aging heat treatment and straightening treatment.
2. The method for preparing the medical high-strength titanium alloy TC4 bar according to claim 1, wherein the reducing drawing specifically comprises: and (3) passing the titanium alloy TC4 wire through a wire drawing furnace at the temperature of 700-750 ℃ for multiple times of reducing drawing and then annealing to obtain the titanium alloy TC4 wire with the diameter of 1.0-5.0 mm.
3. The method for preparing the medical high-strength titanium alloy TC4 bar according to claim 1, wherein the aging heat treatment specifically comprises: titanium alloy TC4 wire with the diameter of 1.0-5.0 mm is heated to 500 ℃ and is kept warm for 4 hours.
4. The preparation method of the medical high-strength titanium alloy TC4 bar according to claim 1, wherein the straightening treatment specifically comprises: straightening the titanium alloy TC4 wire with the diameter of 1.0-5.0 mm on a slide block straightening machine at the wire feeding speed of 1-4 m/min and the straightening frequency of 28.50.
5. The method for preparing the medical high-strength titanium alloy TC4 bar according to claim 4, wherein the straightening treatment further comprises: and cutting the straightened titanium alloy TC4 bar into 3m pieces, polishing the surface by using a centerless grinder, and then cleaning and detecting.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000622A (en) * | 2021-02-25 | 2021-06-22 | 迪恩医疗科技有限公司 | Manufacturing method of orthopedic implant connecting rod |
| CN113369815A (en) * | 2021-06-16 | 2021-09-10 | 宁波兆盈医疗器械有限公司 | Processing method of pre-bent connecting rod |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167659A (en) * | 1997-03-27 | 1997-12-17 | 西北有色金属研究院 | Method for surface treatment of titanium and titanium alloy sections for cold drawing |
| JP2011137204A (en) * | 2009-12-28 | 2011-07-14 | Daido Steel Co Ltd | Method for manufacturing rod stock made from titanium alloy |
| CN102477502A (en) * | 2010-11-30 | 2012-05-30 | 西安赛特金属材料开发有限公司 | Medical high-strength titanium alloy wire and preparation method thereof |
| CN102814348A (en) * | 2012-08-30 | 2012-12-12 | 西北有色金属研究院 | Lubricant for wall reduction and drawing of titanium alloy pipe and using method thereof |
| KR20130070914A (en) * | 2011-12-20 | 2013-06-28 | 포항공과대학교 산학협력단 | Method of manufacturing ultrafine-grained titanium rod for biomedical applications, and titanium rod manufactured by the same |
| CN104775053A (en) * | 2015-04-28 | 2015-07-15 | 宝鸡鑫诺新金属材料有限公司 | Preparation process of medical Ti-6Al-7Nb alloy wires for manufacturing Kirschner wires |
-
2020
- 2020-08-21 CN CN202010849828.XA patent/CN111992993A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167659A (en) * | 1997-03-27 | 1997-12-17 | 西北有色金属研究院 | Method for surface treatment of titanium and titanium alloy sections for cold drawing |
| JP2011137204A (en) * | 2009-12-28 | 2011-07-14 | Daido Steel Co Ltd | Method for manufacturing rod stock made from titanium alloy |
| CN102477502A (en) * | 2010-11-30 | 2012-05-30 | 西安赛特金属材料开发有限公司 | Medical high-strength titanium alloy wire and preparation method thereof |
| KR20130070914A (en) * | 2011-12-20 | 2013-06-28 | 포항공과대학교 산학협력단 | Method of manufacturing ultrafine-grained titanium rod for biomedical applications, and titanium rod manufactured by the same |
| CN102814348A (en) * | 2012-08-30 | 2012-12-12 | 西北有色金属研究院 | Lubricant for wall reduction and drawing of titanium alloy pipe and using method thereof |
| CN104775053A (en) * | 2015-04-28 | 2015-07-15 | 宝鸡鑫诺新金属材料有限公司 | Preparation process of medical Ti-6Al-7Nb alloy wires for manufacturing Kirschner wires |
Non-Patent Citations (1)
| Title |
|---|
| 樊亚军;曹继敏;杨华斌;柳永宁;: "一种高强度Ti-6Al-4V钛合金丝材制备工艺的研究", 热加工工艺, no. 10, pages 24 - 26 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000622A (en) * | 2021-02-25 | 2021-06-22 | 迪恩医疗科技有限公司 | Manufacturing method of orthopedic implant connecting rod |
| CN113369815A (en) * | 2021-06-16 | 2021-09-10 | 宁波兆盈医疗器械有限公司 | Processing method of pre-bent connecting rod |
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