CN103170516B - The short process making method of a kind of magnesium or magnesium alloy capillary - Google Patents
The short process making method of a kind of magnesium or magnesium alloy capillary Download PDFInfo
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- CN103170516B CN103170516B CN201310068457.1A CN201310068457A CN103170516B CN 103170516 B CN103170516 B CN 103170516B CN 201310068457 A CN201310068457 A CN 201310068457A CN 103170516 B CN103170516 B CN 103170516B
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Abstract
A short process making method for magnesium or magnesium alloy capillary, comprises the steps: first to adopt continuous directional solidification technology to prepare surfaces externally and internally light, has continuous cylindrical crystalline texture, minor diameter thin wall magnesium that cold-forming property is excellent or magnesium alloy pipe; Then do not carrying out directly carrying out follow-up drawing processing to magnesium or magnesium alloy pipe in any surface-treated situation, do not need in drawing process carry out intermediate annealing or only need a small amount of process annealing, short flow high efficiency prepares magnesium or magnesium alloy capillary.The present invention is processed into magnesium or magnesium alloy capillary owing to adopting the minor diameter thin wall magnesium continuous directional solidification technology prepared or magnesium alloy pipe directly to carry out drawing, and without the need to carrying out intermediate annealing or only needing a small amount of process annealing in drawing process, therefore technological process of the present invention is short, production efficiency is high, cost is low, and without operations such as cut-out, machined, pickling in capillary drawing process, the working (machining) efficiency of capillary can be increased substantially.
Description
Technical field
The present invention relates to metal material processing technical field, particularly relate to the short process making method of a kind of magnesium or magnesium alloy capillary.
Background technology
Endovascular stent is one of most effective method of Cardiovarscular, is widely used in the fields such as medical-therapeutic treatment of human body.Metal capillary is the critical piece of metallic blood vessel inner support, is the key determining metallic blood vessel inner support quality.At present, metallic blood vessel inner bracket material used mainly contains the metal capillaries such as stainless steel, cobalt alloy and titanium alloy, but these metal capillaries exist and permanently retain in body, have and certain cause thrombotic, the ISR still higher and problem such as vascular wall can be caused weak, make it apply to be extremely restricted, thus force people to find new alternative metals capillary material.Research finds, compared with conventional metals capillary material, Mg-based hydrogen storage has significant advantage: (1) magnesium is element required in human body, be only second to calcium, the macroelement of sodium and potassium, 2) magnesium has degradability in human body, easily absorbed by body tissue, excessive magnesium ion excretes by urine, (3) its corrosion product is to the effect of human non-toxic's evil, and participate in human homergy, the implantation later stage can be effectively avoided to cause endometrial hyperplasia and ISR to the stimulation of vascular wall, (4) compared with other biomedical metallic material, magnesium and people's biomechanics of bone compatibility better, can effectively avoid not mating due to embedded material and people's flexible bone modulus causing bone strength to reduce and the problem such as slow that heals, (5) magnesium resource is relatively abundant, cheap [see: Qi Wenjun. Guangdong Province's magnesium industry Technology Roadmap. Guangzhou: publishing house of South China Science & Engineering University, 2010:P34].Therefore, Mg-based hydrogen storage shows huge potentiality as biomedical metallic material of new generation, and the alternative materials in fields such as medical-therapeutic treatment of human body as metals such as stainless steel, cobalt alloy and titanium alloys has potential application prospect.
But, require that material must have excellent degradability, biocompatibility and good mechanical compatibility for the medical magnesium of endovascular stent etc. or magnesium alloy capillary.Therefore, only have and prepare the outstanding magnesium of high purity, uniform composition, surface quality or magnesium alloy capillary could meet medical requirement.The magnesium of current exploitation or the general preparation technology of magnesium alloy capillary are: ingot casting → hot extrusion → solution treatment+quenching → machined → solution treatment+quenching → heating+empty drawing → solution treatment+quenching → surface finish [is shown in: Yu Baoyi, Wu Yongguang, He Miao, Deng. a kind of process for forming magnesium alloy ultra-fine thin-wall tube for degradable blood vessel bracket. Chinese patent, CN101085377A, 2007-01-12].The advantages such as it is more ripe that above capillary production method has production technology, and product quality is comparatively stable, but cumbersome, long flow path, energy consumption are large, production efficiency is low, and production cost is high; Ingot casting homogeneity of ingredients is poor, and capillary performance uniformity prepared by same ingot casting is poor; Material is in process and after processing, and surface is oxidizable, and surface quality is poor; Waste of material is serious, lumber recovery is low; Repeatedly during empty drawing, because the inhomogeneities of metal flow easily causes, capillary inner surface is wrinkling and wall unevenness is even, thus affects the surface quality of magnesium or magnesium alloy capillary.These problems all significantly limit the fast development of medical magnesium or magnesium alloy capillary and apply above.
Summary of the invention
The object of the invention is to for above-mentioned existing problems and deficiency, provide that a kind of production technology is simple, flow process is short, efficiency is high, cost is low, the short process making method of magnesium that the properties of product of preparation are high or magnesium alloy capillary.
Technical scheme of the present invention is achieved in that
The short process making method of magnesium of the present invention or magnesium alloy capillary, is characterized in comprising the steps:
A, magnesium or magnesium alloy to be melted at 700 ~ 850 DEG C, adopt glass tube down-drawing to prepare that external diameter is 5.0 ~ 10.0mm, wall thickness is 1.0 ~ 2.0mm with the casting speed of 30 ~ 50mm/min on continuous directional solidification apparatus and surfaces externally and internally is bright, have continuous cylindrical crystalline texture, magnesium that cold-forming property is excellent or magnesium alloy pipe.
B, directly magnesium or magnesium alloy pipe to be carried out multi-pass without any surface treatment and draw and dial processing, draw and dial in process without the need to carrying out intermediate annealing or only needing a small amount of process annealing, and draw dial processing be first carry out 1 ~ 15 passage have core draw dial, carry out again 1 ~ 15 passage sky draw dial, there is core to draw to dial and sky draws drawing of dialling to dial pass reduction all between 1.2 ~ 1.5, final obtain magnesium or the magnesium alloy capillary that external diameter is 1.0 ~ 3.0mm, wall thickness is 0.1 ~ 0.5mm.
Wherein, the surfaces externally and internally light of continuous directional solidification magnesium prepared by the present invention or magnesium alloy pipe, without the need to the process such as machined, pickling, can be directly used in follow-up drawing processing, and have core drawing and empty drawing through 1 ~ 15 passage, short route shaping magnesium or magnesium alloy capillary; And can implement 1 ~ 2 process annealing as required in drawing process, its annealing temperature is lower than the recrystallization temperature of magnesium or magnesium alloy pipe.
The invention has the advantages that:
1, compared with preparing processing method with conventional capillary, the minor diameter thin wall tubing that the present invention adopts continuous directional solidification technology to produce has continuous cylindrical crystalline texture, its cold working extending and deforming capacity is significantly better than various casting and Deformation structure's pipe, be conducive to improving pass reduction, reduce processing passage.
2, tubing surfaces externally and internally light, just directly can carry out drawing processing without the need to carrying out any surface treatment, not need carry out intermediate annealing or only need a small amount of process annealing in drawing process, be conducive to significantly shortening flow process, enhance productivity, improve lumber recovery, reduce production cost.
3, adopt the present invention to reduce even to economize except intermediate annealing operation, effectively can reduce the surface oxidation after annealing such as lubricant, be conducive to the capillary obtaining excellent surface quality.
4, in capillary drawing process without the operation such as cut-outs, machined, pickling, capillary working (machining) efficiency can be increased substantially, can effectively prevent metal fillings and other foreign matter from adhering to tube surfaces, guarantee inner surface quality.
Detailed description of the invention
The short process making method of magnesium of the present invention or magnesium alloy capillary, comprises the steps:
A, magnesium or magnesium alloy to be melted at 700 ~ 850 DEG C, adopt glass tube down-drawing to prepare that external diameter is 5.0 ~ 10.0mm, wall thickness is 1.0 ~ 2.0mm with the casting speed of 30 ~ 50mm/min on continuous directional solidification apparatus and surfaces externally and internally is bright, have continuous cylindrical crystalline texture, magnesium that cold-forming property is excellent or magnesium alloy pipe.
B, directly magnesium or magnesium alloy pipe to be carried out multi-pass without any surface treatment and draw and dial processing, draw and dial in process without the need to carrying out intermediate annealing or only needing a small amount of process annealing, and draw dial processing be first carry out 1 ~ 15 passage have core draw dial, carry out again 1 ~ 15 passage sky draw dial, there is core to draw to dial and sky draws drawing of dialling to dial pass reduction all between 1.2 ~ 1.5, final obtain magnesium or the magnesium alloy capillary that external diameter is 1.0 ~ 3.0mm, wall thickness is 0.1 ~ 0.5mm.
Wherein, the surfaces externally and internally light of continuous directional solidification magnesium prepared by the present invention or magnesium alloy pipe, without the need to the process such as machined, pickling, can be directly used in follow-up drawing processing, and have core drawing and empty drawing through 1 ~ 15 passage, short route shaping magnesium or magnesium alloy capillary; And can implement 1 ~ 2 process annealing as required in drawing process, its annealing temperature is lower than the recrystallization temperature of magnesium or magnesium alloy pipe.
Embodiment 1: the preparation method being of a size of the pure magnesium capillary of f3.0 × 0.5mm
Adopt purity be 99.99% magnesium melt at 850 DEG C, the surfaces externally and internally adopting glass tube down-drawing to prepare f10.0 × 2.0mm with the casting speed of 30mm/min on continuous directional solidification apparatus is bright, the pure magnesium tubing with continuous cylindrical crystalline texture; Pure for the minor diameter thin wall of surface-brightening magnesium tubing is directly carried out belt carcass cephalic disc draw, become the tubing of f4.0 × 0.35mm through 10 passes of drawing, then be drawn into the pure magnesium capillary of f3.0 × 0.5mm through 3 passage skies.Wherein, drawing passes lengthening coefficient is between 1.2 ~ 1.5, and lubricant is vegetable oil.
Embodiment 2: the preparation method being of a size of the pure magnesium capillary of f2.0 × 0.35mm
Adopt purity be 99.99% magnesium melt at 750 DEG C, adopt glass tube down-drawing to prepare with the casting speed of 40mm/min the pure magnesium tubing that f7.5 × 1.0mm surfaces externally and internally is bright, have continuous cylindrical crystalline texture on continuous directional solidification apparatus; Pure for the minor diameter thin wall of surface-brightening magnesium tubing is directly carried out belt carcass cephalic disc draw, become the tubing of f4.0 × 0.35mm through 10 passes of drawing, then be drawn into the pure magnesium capillary of f2.0 × 0.35mm through 3 passage skies.Wherein, drawing passes lengthening coefficient is between 1.2 ~ 1.5, and lubricant is vegetable oil.
Embodiment 3: the preparation method being of a size of the pure magnesium capillary of f1.0 × 0.1mm
Adopt purity be 99.99% magnesium melt at 700 DEG C, the surfaces externally and internally adopting glass tube down-drawing to prepare f5.0 × 1.0mm with the casting speed of 50mm/min on continuous directional solidification apparatus is bright, the pure magnesium tubing with continuous cylindrical crystalline texture; Pure for the minor diameter thin wall of surface-brightening magnesium tubing is directly carried out belt carcass cephalic disc draw, become the tubing of f4.0 × 0.3mm through 3 passes of drawing, then be drawn into the pure magnesium capillary of f1.0 × 0.1mm through 10 passage core bars.Wherein, drawing passes lengthening coefficient is between 1.2 ~ 1.5, and lubricant is vegetable oil.
The present invention is described by embodiment, but the present invention is not construed as limiting, with reference to description of the invention, other changes of the disclosed embodiments, as the professional person for this area easily expects, such change should belong within the scope of the claims in the present invention restriction.
Claims (1)
1. a short process making method for magnesium or magnesium alloy capillary, is characterized in that comprising the steps:
A, magnesium or magnesium alloy to be melted at 700 ~ 850 DEG C, adopt glass tube down-drawing to prepare that external diameter is 5.0 ~ 10.0mm, wall thickness is 1.0 ~ 2.0mm with the casting speed of 30 ~ 50mm/min on continuous directional solidification apparatus and surfaces externally and internally is bright, have continuous cylindrical crystalline texture, magnesium that cold-forming property is excellent or magnesium alloy pipe;
B, directly magnesium or magnesium alloy pipe to be carried out multi-pass without any surface treatment and draw and dial processing, draw and dial in process without the need to carrying out intermediate annealing or only needing a small amount of process annealing, and draw dial processing be first carry out 10 ~ 15 passages have core draw dial, carry out again 10 ~ 15 passage skies draw dial, there is core to draw to dial and empty draw drawing of dialling to dial pass reduction to be 1.2, finally obtaining magnesium or the magnesium alloy capillary that external diameter is 1.0 ~ 3.0mm, wall thickness is 0.1 ~ 0.5mm.
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| CN103170516B true CN103170516B (en) | 2015-11-18 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331582B (en) * | 2013-07-04 | 2015-11-25 | 扬州大学 | A kind of method preparing metal thin-wall microtubule |
| CN103878201B (en) * | 2014-03-20 | 2016-06-08 | 北京科技大学 | The preparation method of a kind of high-performance copper/Al bimetal kapillary |
| CN103878202B (en) * | 2014-03-20 | 2016-08-31 | 北京科技大学 | A kind of preparation method of copper/Al bimetal capillary tube |
| CN103878203B (en) * | 2014-03-20 | 2016-06-08 | 北京科技大学 | The preparation method of a kind of composite bimetal pipe |
| CN103861887B (en) * | 2014-03-20 | 2016-06-15 | 北京科技大学 | A kind of preparation method of high-performance copper/titanium bimetallic capillary tube |
| CN105107856A (en) * | 2015-08-25 | 2015-12-02 | 山东建筑大学 | Novel method for preparing high-strength nanocrystalline AZ31 magnesium alloy tube |
| CN106269939B (en) * | 2016-08-18 | 2018-08-14 | 亚太轻合金(南通)科技有限公司 | A kind of preparation method of aluminium alloy capillary |
| CN108262368B (en) * | 2017-08-21 | 2020-04-10 | 广东省材料与加工研究所 | Preparation method of high-performance medical magnesium alloy thin-wall pipe |
| CN111571128B (en) * | 2020-05-07 | 2022-07-05 | 沪创医疗科技（上海）有限公司 | Preparation method of biodegradable superfine crystal magnesium alloy intravascular stent |
| CN112246898A (en) * | 2020-09-25 | 2021-01-22 | 北京工业大学 | Preparation method for Mg-Zn-Mn-Ca magnesium alloy micro-tube |
| CN113444888B (en) * | 2021-06-29 | 2022-06-24 | 重庆大学 | Method for purifying magnesium melt by adopting directional solidification |
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| CN1596319A (en) * | 2002-03-04 | 2005-03-16 | 住友电工钢铁电缆株式会社 | Manesium base alloy tube and method for manufacture thereof |
| CN101322985A (en) * | 2008-07-22 | 2008-12-17 | 西北有色金属研究院 | Warm state drawing method for processing medical magnesium alloy fine-radial thin-wall pipes |
| CN102489535A (en) * | 2011-11-29 | 2012-06-13 | 北京科技大学 | Method for preparing and processing cupronickel capillary with high efficiency |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10142204A1 (en) * | 2001-08-24 | 2003-03-06 | Leibniz Inst Fuer Festkoerper | Process for the production of strand-like products from magnesium or magnesium alloys |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1596319A (en) * | 2002-03-04 | 2005-03-16 | 住友电工钢铁电缆株式会社 | Manesium base alloy tube and method for manufacture thereof |
| CN101322985A (en) * | 2008-07-22 | 2008-12-17 | 西北有色金属研究院 | Warm state drawing method for processing medical magnesium alloy fine-radial thin-wall pipes |
| CN102489535A (en) * | 2011-11-29 | 2012-06-13 | 北京科技大学 | Method for preparing and processing cupronickel capillary with high efficiency |
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