CN105478523A - Preparation technology for medical beta type titanium alloy capillary tubes - Google Patents
Preparation technology for medical beta type titanium alloy capillary tubes Download PDFInfo
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- CN105478523A CN105478523A CN201510847894.2A CN201510847894A CN105478523A CN 105478523 A CN105478523 A CN 105478523A CN 201510847894 A CN201510847894 A CN 201510847894A CN 105478523 A CN105478523 A CN 105478523A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/16—Mandrels; Mounting or adjusting same
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Abstract
The invention discloses a preparation technology for medical beta type titanium alloy capillary tubes. The preparation technology comprises the steps of preparing medical beta type titanium alloy ingots through the vacuum self-consuming arc melting method, carrying out forging and cogging on the titanium alloy ingots for forming round ingots, and extruding the round ingots on an extruding machine for forming tube blanks; rolling the tube blanks twice through a three-roller planetary rolling mill, and carrying out on-line induction heating on the tube blanks in the rolling process; rolling the tube blanks further through a three-roller finish tube-rolling machine, and carrying out vacuum annealing in the middle of rolling; finally, drawing the medical beta type titanium alloy tube blanks through a precision tube drawing machine for forming the finished capillary tubes; and adopting carbon fiber rods good in tensile strength, rigidity and self-lubricating property as core rods in the drawing process, and carrying out vacuum annealing in the middle of drawing. The medical beta type titanium alloy capillary tubes obtained through the preparation technology are uniform in wall thickness, smooth in surface and high in ductility; equipment is simple, production is flexible, and the cost is low. The preparation technology is especially suitable for producing the medical beta type titanium alloy capillary tubes in an industrialized and batched mode.
Description
Technical field
The invention belongs to tubing preparing technical field, be specifically related to a kind of preparation technology of biomedical β-type Ti alloys capillary.
Background technology
Medical titanium alloy is mainly concerned with the large class of α type, β type and type alpha+beta 3, alpha titanium alloy and alpha and beta type titan alloy (as Ti6AI4V, Ti6A17Nb etc.) were used to hard tissue repair or alternate material (as products such as gear division class, joint type product and orthopaedics internal fixtion reparation replacement bones plate) once, wherein the good alpha titanium alloy of plasticity such as pure titanium can be processed into intervention capillary, but low strength.
Compare α type and alpha and beta type titan alloy, β type medical titanium alloy has following characteristics: not containing the harmful element such as Al, V, Ni, Co, Cr, intensity is high, plasticity is good, fatigue behaviour is better than 316L stainless steel, CoCrMo and TiNi alloy, and fracture toughness is high, and hot and cold technological forming is good, both can be processed into hard tissue repair substitute products, also be suitable for the processing of intervention capillary and seal wire product.
The processing of medical coronary vessel stent adopts diameter of phi 1-3mm, the metal capillary of wall thickness about 0.1-0.3mm, with regard to titanium alloy, fine-radial thin-wall pipes be still difficult to obtain or pipe workpiece quality poor, endovascular stent processing can not be met and use.In the market a large amount of titanium alloy as materials such as Ti-6Al-4V or other beta titanium alloys all with hot-working state product in market circulation, this is because the cold-forming property of material own is relatively poor, some need cold worked product such as tubing then cannot normally produce, or processing cost is high, lumber recovery is very low.
At present, first prepare beta titanium alloy fine-radial thin-wall pipes needs to adopt accurate pipe mill to carry out cold working to obtain high-quality pipe, then adopts accurate bench drawing to obtain biological support fine-radial thin-wall pipes used.But because beta titanium alloy preliminary work hardening rate is very fast, be easy to when adopting accurate pipe mill cold rolling produce micro-crack even large scale cracking phenomena.
Therefore, market is difficult to the beta titanium alloy small size thick-walled pipe providing diameter of phi 12-15mm, endoporus Φ 4-6mm, length more than 300mm, can only adopts the explained hereafter of solid bar gun drilling, waste of material is large, and working (machining) efficiency is low, cost is high.Traditional Hubbing method comprises the drawing of band core bar, tube drawing with floating plug, composite core head drawing and centreless drawing etc., and drawing temperature is room temperature, adopts solid lubrication.Due to titanium alloy cold deformation difficulty, it is large that said method technology implements difficulty, can not realize smooth drawing, and home and abroad also reported without related data; When adopting centreless drawing, because beta titanium alloy preliminary work hardening rate is fast, capillary tube inner wall is easy to occur micro-crack, causes capillary to be scrapped.Abroad have been reported and adopt high temperature (more than 700 DEG C) drawing process to produce metal capillary, but this technique proposes strict demand to metal surface lubrication, oxide thickness, surface roughness and properties of product control etc., also cannot enter the suitability for industrialized production stage at present.
In sum, compared with abroad, China is very backward in the development of medical metal capillary material, the basic dependence on import of intravascular stent beta titanium alloy fine-radial thin-wall pipes, some low intensive, the injection needle stainless steel capillary meeting general medicine purposes, pure titanium extracapillaries are produced in decapacitation, so far cannot produce and high-qualityly meet coronary artery inner support beta titanium alloy capillary, cause relevant import medical instrument product price to remain high, and limit their extensive propagation and employment.
Summary of the invention
The present invention is directed to the deficiency that existing technique exists, a kind of preparation technology of biomedical β-type Ti alloys capillary is provided, overcome existing technique and prepare biomedical β-type Ti alloys and easily produce micro-crack and working (machining) efficiency is low, high in cost of production defect.
The technical solution adopted in the present invention is: a kind of preparation technology of biomedical β-type Ti alloys capillary, comprises the following steps:
Step 1, extruding produce pipe
Adopt vacuum consumable arc-melting legal system for β type medical titanium alloy ingot, more described titanium alloy ingot hammer cogging made billet, after on extruder, described billet is squeezed into pipe;
Step 2, rolling undergauge
Adopt the above-mentioned pipe of three-roller planetary rolling mill rolling, carry out online eddy-current heating to described pipe during rolling, concrete heating-up temperature value is determined by the material of pipe;
Step 3, again rolling undergauge
Adopt the above-mentioned pipe of the three roller essence further rollings of pipe mill, centre needs to carry out vacuum annealing;
Step 4, drawing are shaping
Adopt accurate bench that the described pipe after the rolling is drawn to capillary, adopt carbon fiber bar as plug during drawing, centre needs to carry out vacuum annealing.
In a kind of preferred embodiment of the present invention, in step 1, described billet diameter is Φ 120-150mm, and described pipe diameter is Φ 60-90mm, and wall thickness is 10-30mm.
In a kind of preferred embodiment of the present invention, in step 2, described three-roller planetary rolling mill is pipe described in rolling at twice, first time with the charging rate of 2-3m/min by described billet production to diameter for Φ 30-40mm, wall thickness is the pipe of 3-5mm; Second time with the charging rate of 4-5m/min by described billet production to diameter for Φ 12-15mm, wall thickness is the pipe of 1.5-3mm.
In a kind of preferred embodiment of the present invention, in step 2, described heating-up temperature is 800-1000 DEG C.
In a kind of preferred embodiment of the present invention, in step 3, described billet production is Φ 5-6mm to diameter by described three rollers essence pipe mills further, and wall thickness is the pipe of 0.5-0.8mm, and rolling single pass deformation rate is greater than 30%.
In a kind of preferred embodiment of the present invention, in step 4, it is Φ 1-3mm that described pipe is drawn to diameter by described accurate bench, and wall thickness is the capillary of 0.1-0.3mm, and single pass deformation rate is greater than 30%.
In a kind of preferred embodiment of the present invention, the number of times of vacuum annealing described in step 3 or step 4 is 2-4 time.
Compared to prior art, the beneficial effect that the present invention has:
One, pipe specification and material wide accommodation, external diameter specification Φ 60-90mm, the pipe of wall thickness 10-30mm, is applicable to multiple beta titanium alloy material.
Two, eddy-current heating is adopted during three-roll planetary rolling, reduction in pass is large, aximal deformation value and high frictional work are transformed into a large amount of heats, beta titanium alloy pipe is impelled to produce dynamic recrystallization when rolling, crystal grain obtains refinement, improves the rolling quality of pipe, for next step rolling and drawing create good condition, after particularly adding, the one-pass roller of step and the deformation rate of drawing, decrease vacuum annealing number of times.
Three, during accurate bench drawing β type medical titanium alloy capillary, carbon fiber rod is adopted to do plug, the tensile strength utilizing carbon fiber rod good, hardness and self-lubricating property, avoid the wearing and tearing that when traditional handicraft has a plug drawing, solid lubrication causes tube wall, and the defect of the micro-crack that inwall easily produces during sinking drawing.
Four, the β type medical titanium alloy capillary wall thickness prepared of the present invention is evenly, smooth surface, percentage elongation be high, simultaneously equipment simple, produce flexibly, cost is low, is specially adapted to industrialized mass β type medical titanium alloy capillary.
Accompanying drawing explanation
Fig. 1 is three-roller planetary rolling mill rolling pipe pass schematic diagram of the present invention;
Fig. 2 is β type medical titanium alloy capillary drawing schematic diagram of the present invention.
Wherein, 1, roll, 2, pipe, 3, carbon fiber bar plug, 4, pipe die, I, the section of nipping, II, rolloff section, III, expansion section, IV, round gauge section.
Detailed description of the invention
Below in conjunction with the drawings and the specific embodiments, the present invention is described in detail.
A preparation technology for biomedical β-type Ti alloys capillary, comprises the following steps:
Step 1, extruding produce pipe
Adopt vacuum consumable arc-melting legal system for β type medical titanium alloy ingot, more described titanium alloy ingot hammer cogging made billet, after on extruder, described billet is squeezed into pipe;
Described billet diameter is Φ 120-150mm, and described pipe diameter is Φ 60-90mm, and wall thickness is 10-30mm.
Step 2, rolling undergauge
Adopt the above-mentioned pipe of three-roller planetary rolling mill rolling, carry out online eddy-current heating to described pipe during rolling, concrete heating-up temperature value is determined by the material of pipe; Described heating-up temperature is 800-1000 DEG C.
Described three-roller planetary rolling mill is pipe described in rolling at twice, first time with the charging rate of 2-3m/min by described billet production to diameter for Φ 30-40mm, wall thickness is the pipe of 3-5mm; Second time with the charging rate of 4-5m/min by described billet production to diameter for Φ 12-15mm, wall thickness is the pipe of 1.5-3mm.
Step 3, again rolling undergauge
Adopt the above-mentioned pipe of the three roller essence further rollings of pipe mill, centre needs to carry out 2-4 vacuum annealing.
Described billet production is Φ 5-6mm to diameter by described three rollers essence pipe mills further, and wall thickness is the pipe of 0.5-0.8mm, and rolling single pass deformation rate is greater than 30%.
Step 4, drawing are shaping
Adopt accurate bench that the described pipe after the rolling is drawn to capillary, adopt carbon fiber bar as plug during drawing, centre needs to carry out 2-4 vacuum annealing.
It is Φ 1-3mm that described pipe is drawn to diameter by described accurate bench, and wall thickness is the capillary of 0.1-0.3mm, and single pass deformation rate is greater than 30%.
Further illustrate, in the invention process, three-roller planetary rolling mill rolling pipe pass as shown in Figure 1, carbon fiber bar plug 3 is as plug, pipe 2 is by roll 1 rolling of three-roller planetary rolling mill, and rolling extrusion process goes through the section of nipping I, rolloff section II, expansion section III, the process of round gauge section IV four-stage.As shown in Figure 2, pipe 2 is elongated by undergauge β type medical titanium alloy capillary drawing process under the effect of pipe die 4.
Embodiment 1
Preparation consists of the β type medical titanium alloy capillary of Ti-20Nb-3Zr.
(1) pipe is produced in extruding: adopt vacuum consumable arc-melting method to be titanium alloy ingot by Ti-20Nb-3Zr melting, after hammer cogging, make the billet of diameter of phi 120mm, it is Φ 60mm that 1250 tons of extruders squeeze out diameter, wall thickness is the pipe of 10mm, inside and outside polishing.
(2) rolling undergauge: adopt the Ti-20Nb-3Zr titanium alloy pipe of three-roller planetary rolling mill at twice after rolling extruding: first time, to be rolled down to diameter be Φ 32mm, is the pipe of wall thickness 3mm; It is Φ 12mm that second time is rolled down to diameter, and wall thickness is the pipe of 1.5mm, carries out online eddy-current heating during rolling to pipe, heating-up temperature 850 DEG C, and rolling charging rate first time is 2m/min, and second time is 4m/min;
(3) rolling undergauge again: adopt three rollers essence pipe mills by diameter of phi 12mm, it is Φ 5mm that the Ti-20Nb-3Zr titanium alloy pipe of wall thickness 1.5mm is rolled into diameter further, wall thickness is the pipe of 0.5mm, rolling single pass deformation rate 35%, and centre needs to carry out 2 vacuum annealings.
(4) drawing is shaping: adopt accurate bench to be Φ 5mm by diameter, wall thickness is that to be drawn to diameter be Φ 1.5mm to the Ti-20Nb-3Zr titanium alloy pipe of 0.5mm, wall thickness is the capillary finished product of 0.15mm, diameter of phi 1.2mm carbon fiber bar is adopted to do plug during drawing, drawing single pass deformation rate 35%, centre needs to carry out 3 vacuum annealings.
Capillary finished product has the elastic modelling quantity of 70GPa, and tensile strength is 1022MPa, elongation after fracture 12%, and this titanium alloy capillary is not containing toxin, the advantage with high strength, low elastic modulus, high ductibility, good biocompatibility.
Embodiment 2
Preparation consists of the β type medical titanium alloy capillary of Ti-14Nb-5Ta.
(1) pipe is produced in extruding: adopt vacuum consumable arc-melting method to be titanium alloy ingot by Ti-14Nb-5Ta melting, after hammer cogging, make the billet of diameter of phi 140mm, it is Φ 70mm that 1250 tons of extruders squeeze out diameter, wall thickness is the pipe of 15mm, inside and outside polishing.
(2) rolling undergauge: adopt the Ti-14Nb-5Ta titanium alloy pipe of three-roller planetary rolling mill at twice after rolling extruding: first time, to be rolled down to diameter be Φ 35mm, and wall thickness is the pipe of 3.5mm; It is Φ 15mm that second time is rolled down to diameter, is the pipe of wall thickness 1.8mm, carries out online eddy-current heating during rolling to pipe, heating-up temperature 900 DEG C, and rolling charging rate first time is 2.5m/min, and second time is 4.5m/min.
(3) rolling undergauge again: adopt three rollers essence pipe mills to be Φ 15mm by diameter, wall thickness is that to be rolled into diameter be further Φ 5.5mm to the Ti-14Nb-5Ta titanium alloy pipe of 1.8mm, wall thickness is the pipe of 0.6mm, rolling single pass deformation rate 32%, and centre needs to carry out 3 vacuum annealings.
(4) drawing is shaping: adopt accurate bench to be Φ 5.5mm by diameter, wall thickness is that to be drawn to diameter be Φ 2mm to the Ti-14Nb-5Ta titanium alloy pipe of 0.6mm, wall thickness is the capillary finished product of 0.2mm, diameter of phi 1.6mm carbon fiber bar is adopted to do plug during drawing, drawing single pass deformation rate 33%, centre needs to carry out 3 vacuum annealings.
Capillary finished product has the elastic modelling quantity of 60GPa, and tensile strength is 935MPa, elongation after fracture 15%, and this titanium alloy capillary is not containing toxin, the advantage with high strength, low elastic modulus, high ductibility, good biocompatibility.
Embodiment 3
Preparation consists of the β type medical titanium alloy capillary of Ti-12Nb-6Sn.
(1) pipe is produced in extruding: adopt vacuum consumable arc-melting method to be titanium alloy ingot by Ti-12Nb-6Sn melting, after hammer cogging, make the billet of diameter of phi 150mm, it is Φ 80mm that 1250 tons of extruders squeeze out diameter, wall thickness is the pipe of 20mm, inside and outside polishing.
(2) rolling undergauge: adopt the Ti-12Nb-6Sn titanium alloy pipe of three-roller planetary rolling mill at twice after rolling extruding: first time, to be rolled down to diameter be Φ 40mm, and wall thickness is the pipe of 4mm; It is Φ 18mm that second time is rolled down to diameter, and wall thickness is the pipe of 2mm, carries out online eddy-current heating during rolling to pipe, heating-up temperature 900 DEG C, and rolling charging rate first time is 3m/min, and second time is 5m/min.
(3) rolling undergauge again: adopt three rollers essence pipe mills to be Φ 18mm by diameter, wall thickness is that to be rolled into diameter be further Φ 6mm to the Ti-12Nb-6Sn titanium alloy pipe of 2mm, wall thickness is the pipe of 0.8mm, rolling single pass deformation rate 36%, and centre needs to carry out 3 vacuum annealings.
(4) drawing is shaping: be Φ 6mm with accurate bench by diameter, wall thickness is that to be drawn to diameter be Φ 2.5mm to the Ti-12Nb-6Sn titanium alloy pipe of 0.8mm, wall thickness is the capillary finished product of 0.25mm, diameter of phi 2mm carbon fiber bar is adopted to do plug during drawing, drawing single pass deformation rate 34%, centre needs to carry out 3 vacuum annealings.
Capillary finished product has the elastic modelling quantity of 65GPa, and tensile strength is 975MPa, elongation after fracture 14%, and this titanium alloy capillary is not containing toxin, the advantage with high strength, low elastic modulus, high ductibility, good biocompatibility.
Claims (7)
1. a preparation technology for biomedical β-type Ti alloys capillary, is characterized in that, comprises the following steps:
Step 1, extruding produce pipe
Adopt vacuum consumable arc-melting legal system for β type medical titanium alloy ingot, more described titanium alloy ingot hammer cogging made billet, after on extruder, described billet is squeezed into pipe;
Step 2, rolling undergauge
Adopt the above-mentioned pipe of three-roller planetary rolling mill rolling, carry out online eddy-current heating to described pipe during rolling, concrete heating-up temperature value is determined by the material of pipe;
Step 3, again rolling undergauge
Adopt the above-mentioned pipe of the three roller essence further rollings of pipe mill, centre needs to carry out vacuum annealing;
Step 4, drawing are shaping
Adopt accurate bench that the described pipe after the rolling is drawn to capillary, adopt carbon fiber bar as plug during drawing, centre needs to carry out vacuum annealing.
2. the preparation technology of a kind of biomedical β-type Ti alloys capillary as claimed in claim 1, is characterized in that, in step 1, described billet diameter is Φ 120-150mm, and described pipe diameter is Φ 60-90mm, and wall thickness is 10-30mm.
3. the preparation technology of a kind of biomedical β-type Ti alloys capillary as claimed in claim 1, it is characterized in that, in step 2, described three-roller planetary rolling mill is pipe described in rolling at twice, first time with the charging rate of 2-3m/min by described billet production to diameter for Φ 30-40mm, wall thickness is the pipe of 3-5mm; Second time with the charging rate of 4-5m/min by described billet production to diameter for Φ 12-15mm, wall thickness is the pipe of 1.5-3mm.
4. the preparation technology of a kind of biomedical β-type Ti alloys capillary as claimed in claim 3, is characterized in that, in step 2, described heating-up temperature is 800-1000 DEG C.
5. the preparation technology of a kind of biomedical β-type Ti alloys capillary as claimed in claim 1, it is characterized in that, in step 3, described billet production is Φ 5-6mm to diameter by described three rollers essence pipe mills further, wall thickness is the pipe of 0.5-0.8mm, and rolling single pass deformation rate is greater than 30%.
6. the preparation technology of a kind of biomedical β-type Ti alloys capillary as claimed in claim 1, it is characterized in that, in step 4, it is Φ 1-3mm that described pipe is drawn to diameter by described accurate bench, wall thickness is the capillary of 0.1-0.3mm, and single pass deformation rate is greater than 30%.
7. the preparation technology of a kind of biomedical β-type Ti alloys capillary as described in any one of claim 5 to 6 claim, is characterized in that, the number of times of vacuum annealing described in step 3 or step 4 is 2-4 time.
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| CN201510847894.2A CN105478523A (en) | 2015-11-27 | 2015-11-27 | Preparation technology for medical beta type titanium alloy capillary tubes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964716A (en) * | 2016-05-11 | 2016-09-28 | 郑州大学 | One-step forming processing method of magnesium alloy small-diameter thin-wall capillary tube used for vascular stent |
| CN107442597A (en) * | 2017-07-01 | 2017-12-08 | 深圳市远思达成科技有限公司 | A kind of preparation technology of medical titanium alloy small-diameter thick-walled |
| CN108637033A (en) * | 2018-04-13 | 2018-10-12 | 西安瑞鑫科金属材料有限责任公司 | A method of preparing titanium alloy capillary tubes |
| CN111229858A (en) * | 2020-01-14 | 2020-06-05 | 深圳市鸿亨珠宝首饰有限公司 | Hollow tube forming process |
| CN113500097A (en) * | 2021-07-30 | 2021-10-15 | 王声兰 | Preparation method and application of alloy thin-wall capillary tube for hydrogen purification |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964716A (en) * | 2016-05-11 | 2016-09-28 | 郑州大学 | One-step forming processing method of magnesium alloy small-diameter thin-wall capillary tube used for vascular stent |
| CN107442597A (en) * | 2017-07-01 | 2017-12-08 | 深圳市远思达成科技有限公司 | A kind of preparation technology of medical titanium alloy small-diameter thick-walled |
| CN108637033A (en) * | 2018-04-13 | 2018-10-12 | 西安瑞鑫科金属材料有限责任公司 | A method of preparing titanium alloy capillary tubes |
| CN111229858A (en) * | 2020-01-14 | 2020-06-05 | 深圳市鸿亨珠宝首饰有限公司 | Hollow tube forming process |
| CN111229858B (en) * | 2020-01-14 | 2021-09-21 | 深圳市鸿亨珠宝首饰有限公司 | Hollow tube forming process |
| CN113500097A (en) * | 2021-07-30 | 2021-10-15 | 王声兰 | Preparation method and application of alloy thin-wall capillary tube for hydrogen purification |
| CN113500097B (en) * | 2021-07-30 | 2023-03-03 | 李新中 | Preparation method and application of alloy thin-wall capillary tube for hydrogen purification |
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Application publication date: 20160413 |