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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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000011777 magnesium Substances 0.000 title claims abstract description 57
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 52
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000000137 annealing Methods 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000007711 solidification Methods 0.000 claims abstract description 10
- 230000008023 solidification Effects 0.000 claims abstract description 10
- 238000004381 surface treatment Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 7
- 238000003280 down draw process Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000003754 machining Methods 0.000 abstract description 5
- 238000005554 pickling Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 2
- 238000005482 strain hardening Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 239000000314 lubricant Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000002792 vascular Effects 0.000 description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 description 3
- 239000008158 vegetable oil Substances 0.000 description 3
- 229910000531 Co alloy Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000037118 bone strength Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 208000037803 restenosis Diseases 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Abstract
一种镁或镁合金毛细管的短流程制备方法，包括如下步骤：首先采用连续定向凝固技术制备内外表面光亮、具有连续柱状晶组织、冷加工性能优良的小直径薄壁镁或镁合金管材；然后在不进行任何表面处理的情况下直接对镁或镁合金管材进行后续拉拔加工，拉拔加工过程中不需进行中间退火或仅需少量低温退火，短流程高效制备出镁或镁合金毛细管。本发明由于采用将连续定向凝固技术制备的小直径薄壁镁或镁合金管材直接进行拉拔加工制成镁或镁合金毛细管，而且在拉拔加工过程中无需进行中间退火或仅需少量低温退火，因此本发明的工艺流程短，生产效率高，成本低，而且毛细管拉拔加工过程中无切断、机加工、酸洗等工序，可大幅度提高毛细管的加工效率。A short-process preparation method for magnesium or magnesium alloy capillary tubes, comprising the following steps: firstly adopt continuous directional solidification technology to prepare small-diameter thin-walled magnesium or magnesium alloy tubes with bright inner and outer surfaces, continuous columnar grain structure, and excellent cold working performance; In the case of any surface treatment, the subsequent drawing process is directly performed on the magnesium or magnesium alloy tube. During the drawing process, no intermediate annealing or only a small amount of low-temperature annealing is required, and the magnesium or magnesium alloy capillary tube is efficiently prepared in a short process. In the present invention, the small-diameter thin-walled magnesium or magnesium alloy pipe prepared by the continuous directional solidification technology is directly drawn to make a magnesium or magnesium alloy capillary, and no intermediate annealing or only a small amount of low-temperature annealing is required during the drawing process, so The invention has short technological process, high production efficiency and low cost, and there is no cutting, machining, pickling and other processes in the capillary drawing process, which can greatly improve the processing efficiency of the capillary.
Description
技术领域 technical field
本发明涉及金属材料加工技术领域，特别是涉及一种镁或镁合金毛细管的短流程制备方法。 The invention relates to the technical field of metal material processing, in particular to a short-flow preparation method of a magnesium or magnesium alloy capillary.
背景技术 Background technique
血管内支架是治疗心血管疾病最有效的方法之一，被广泛应用于人体医疗等领域。金属毛细管是金属血管内支架的主要部件，是决定金属血管内支架质量的关键。目前，所用的金属血管内支架材料主要有不锈钢、钴合金和钛合金等金属毛细管，但这些金属毛细管存在永久性存留体内、具有一定的致血栓形成性、再狭窄仍较高和可造成血管壁薄弱等问题，使其应用受到极大限制，因而迫使人们寻找新的替代金属毛细管材料。研究发现，与传统金属毛细管材料相比，镁及镁合金具有显著优势：（1）镁是人体内必需的元素，是仅次于钙、钠和钾的常量元素，2）镁在人体中具有可降解性，易被机体组织吸收，过量的镁离子可通过尿液排出体外，（3）其腐蚀产物对人体无毒害作用，并且参与人体正常代谢，能够有效避免植入后期对血管壁的刺激而导致内膜增生及再狭窄，（4）与其它生物医用金属材料相比，镁与人骨力学相容性更好，可有效避免由于植入材料与人骨弹性模量不匹配造成骨骼强度降低和愈合迟缓等问题，（5）镁资源相对较丰富，价格低廉[见：戚文军.广东省镁工业技术路线图.广州：华南理工大学出版社，2010：P34]。因此，镁及镁合金作为新一代生物医用金属材料表现出巨大的潜力，在人体医疗等领域作为不锈钢、钴合金和钛合金等金属的替代材料具有潜在的应用前景。 Intravascular stents are one of the most effective methods for treating cardiovascular diseases and are widely used in human medicine and other fields. The metal capillary is the main component of the metal vascular stent and the key to determine the quality of the metal vascular stent. At present, the metal intravascular stent materials used mainly include metal capillaries such as stainless steel, cobalt alloy, and titanium alloy, but these metal capillaries exist permanently in the body, have certain thrombogenicity, still have high restenosis, and can cause damage to the blood vessel wall. Weakness and other problems greatly limit its application, thus forcing people to look for new alternative metal capillary materials. Studies have found that compared with traditional metal capillary materials, magnesium and magnesium alloys have significant advantages: (1) Magnesium is an essential element in the human body, and is a constant element next to calcium, sodium and potassium; 2) Magnesium has Degradable, easily absorbed by body tissues, excessive magnesium ions can be excreted through urine, (3) its corrosion products are non-toxic to the human body, and participate in the normal metabolism of the human body, which can effectively avoid the stimulation of the blood vessel wall in the later stage of implantation (4) Compared with other biomedical metal materials, magnesium has better mechanical compatibility with human bone, which can effectively avoid bone strength reduction and (5) Magnesium resources are relatively abundant and cheap [see: Qi Wenjun. Technology Roadmap of Magnesium Industry in Guangdong Province. Guangzhou: South China University of Technology Press, 2010: P34]. Therefore, magnesium and magnesium alloys show great potential as a new generation of biomedical metal materials, and have potential application prospects as substitute materials for stainless steel, cobalt alloys, and titanium alloys in fields such as human medicine.
然而，用于血管内支架等的医用镁或镁合金毛细管要求材料必须具有优良的可降解性、生物相容性以及良好的力学相容性。因此，只有制备纯净度高、成分均匀、表面质量优秀的镁或镁合金毛细管才能满足医用要求。目前开发的镁或镁合金毛细管一般制备工艺为：铸锭→热挤压→固溶处理+淬火→机加工→固溶处理+淬火→加热+空拉拔→固溶处理+淬火→表面抛光[见：于宝义,吴永广,何淼,等.一种用于可降解血管支架的镁合金超细薄壁管成形工艺.中国专利，CN101085377A,2007-01-12]。以上毛细管生产方法具有生产技术较成熟，产品质量较稳定等优点，但工艺繁杂、流程长、能耗大、生产效率低，生产成本高；铸锭成分均匀性较差，同一铸锭制备的毛细管性能均一性较差；材料在加工过程中和加工后，表面易氧化，表面质量差；材料浪费严重、成材率低；多次空拉拔时由于金属流动的不均匀性容易造成毛细管内表面起皱和壁厚不均匀，从而影响镁或镁合金毛细管的表面质量。以上这些问题都极大地限制了医用镁或镁合金毛细管的快速发展和推广应用。 However, medical magnesium or magnesium alloy capillaries used for intravascular stents and the like require that the material must have excellent degradability, biocompatibility and good mechanical compatibility. Therefore, only magnesium or magnesium alloy capillaries with high purity, uniform composition, and excellent surface quality can meet medical requirements. The general preparation process of the currently developed magnesium or magnesium alloy capillary is: ingot casting→hot extrusion→solution treatment+quenching→machining→solution treatment+quenching→heating+empty drawing→solution treatment+quenching→surface polishing[ See: Yu Baoyi, Wu Yongguang, He Miao, et al. A forming process for magnesium alloy ultra-thin thin-walled tubes for degradable vascular stents. Chinese patent, CN101085377A, 2007-01-12]. The above capillary production methods have the advantages of relatively mature production technology and relatively stable product quality, but the process is complicated, the process is long, the energy consumption is large, the production efficiency is low, and the production cost is high; the composition uniformity of the ingot is poor, and the capillary prepared by the same ingot The performance uniformity is poor; the surface of the material is easy to oxidize during and after processing, and the surface quality is poor; the material waste is serious and the yield is low; the unevenness of the metal flow during multiple empty drawing is likely to cause cracks on the inner surface of the capillary. Wrinkles and uneven wall thickness, thereby affecting the surface quality of magnesium or magnesium alloy capillaries. The above problems have greatly limited the rapid development and application of medical magnesium or magnesium alloy capillaries.
发明内容 Contents of the invention
本发明的目的在于针对上述存在问题和不足，提供一种生产工艺简单、流程短、效率高、成本低、制备的产品性能高的镁或镁合金毛细管的短流程制备方法。 The object of the present invention is to address the above existing problems and deficiencies, and provide a short-process preparation method for magnesium or magnesium alloy capillary tubes with simple production process, short process, high efficiency, low cost and high performance of the prepared product.
本发明的技术方案是这样实现的： Technical scheme of the present invention is realized like this:
本发明所述的镁或镁合金毛细管的短流程制备方法，其特点是包括如下步骤： The short process preparation method of magnesium or magnesium alloy capillary of the present invention is characterized in that it comprises the following steps:
A、将镁或镁合金在700～850℃下熔化，采用下拉法在连续定向凝固设备上以30～50mm/min的拉坯速度制备出外径为5.0～10.0mm、壁厚为1.0～2.0mm且内外表面光亮、具有连续柱状晶组织、冷加工性能优良的镁或镁合金管材。 A. Melt magnesium or magnesium alloy at 700-850°C, and use the down-draw method to prepare a blank with an outer diameter of 5.0-10.0mm and a wall thickness of 1.0-2.0mm on a continuous directional solidification equipment at a casting speed of 30-50mm/min. Magnesium or magnesium alloy pipes with bright inner and outer surfaces, continuous columnar grain structure, and excellent cold workability.
B、不经任何表面处理直接将镁或镁合金管材进行多道次拉拨加工，拉拨加工过程中无需进行中间退火或仅需少量低温退火，且拉拨加工是先进行1～15道次有芯拉拨，再进行1～15道次空拉拨，有芯拉拨和空拉拨的拉拨道次加工率均在1.2～1.5之间，最终获得外径为1.0～3.0mm、壁厚为0.1～0.5mm的镁或镁合金毛细管。 B. Without any surface treatment, the magnesium or magnesium alloy pipe is directly drawn for multiple passes. During the drawing process, no intermediate annealing or only a small amount of low-temperature annealing is required, and the drawing process is first carried out 1 to 15 times. The cored drawing is followed by 1 to 15 times of empty drawing. The processing rate of the drawing passes of the cored drawing and the empty drawing is both between 1.2 and 1.5, and finally the outer diameter is 1.0 to 3.0mm. Magnesium or magnesium alloy capillary with a thickness of 0.1-0.5 mm.
其中，本发明制备的连续定向凝固镁或镁合金管材的内外表面光亮，无需机加工、酸洗等处理，即可直接用于后续拉拔加工，并经过1～15道次有芯拉拔和空拉拔，短流程成形镁或镁合金毛细管；而且，可以根据需要在拉拔加工过程中实施1～2次低温退火，其退火温度低于镁或镁合金管材的再结晶温度。 Among them, the continuous directional solidification magnesium or magnesium alloy pipe prepared by the present invention has a bright inner and outer surface, and can be directly used for subsequent drawing processing without machining, pickling, etc., and after 1 to 15 passes of cored drawing and Empty drawing, forming magnesium or magnesium alloy capillary tubes in a short process; moreover, low-temperature annealing can be carried out 1 or 2 times during the drawing process according to needs, and the annealing temperature is lower than the recrystallization temperature of magnesium or magnesium alloy tubes.
本发明的优点在于： The advantages of the present invention are:
1、与传统毛细管制备加工方法相比，本发明采用连续定向凝固技术生产的小直径薄壁管材具有连续柱状晶组织，其冷加工延伸变形能力显著优于各种铸造和变形组织管坯，有利于提高道次加工率，减少加工道次。 1. Compared with the traditional capillary preparation and processing method, the small-diameter thin-walled pipe produced by the continuous directional solidification technology of the present invention has a continuous columnar crystal structure, and its cold working extension deformation ability is significantly better than various casting and deformation structure tube blanks, which is beneficial to Improve pass processing rate and reduce processing pass.
2、管材内外表面光亮，无需进行任何表面处理就可以直接进行拉拔加工，拉拔加工过程中不需进行中间退火或仅需少量低温退火，有利于大幅度缩短流程，提高生产效率，提高成材率，降低生产成本。 2. The inner and outer surfaces of the pipe are bright, and can be directly drawn without any surface treatment. During the drawing process, no intermediate annealing or only a small amount of low-temperature annealing is required, which is conducive to greatly shortening the process, improving production efficiency, and improving the finished product. rate, reducing production costs.
3、采用本发明可以减少甚至省除中间退火工序，可有效减少润滑剂等在退火后表面氧化，有利于获得表面质量优良的毛细管。 3. Adopting the present invention can reduce or even eliminate the intermediate annealing process, can effectively reduce the surface oxidation of lubricants after annealing, and is beneficial to obtain capillary tubes with excellent surface quality.
4、毛细管拉拔加工过程中无切断、机加工、酸洗等工序，可大幅度提高毛细管加工效率，可有效防止金属屑和其它异物粘附管材表面，保证内表面质量。 4. There are no cutting, machining, pickling and other processes in the capillary drawing process, which can greatly improve the capillary processing efficiency, effectively prevent metal chips and other foreign matter from adhering to the surface of the pipe, and ensure the quality of the inner surface.
具体实施方式 Detailed ways
本发明所述的镁或镁合金毛细管的短流程制备方法，包括如下步骤： The short process preparation method of magnesium or magnesium alloy capillary described in the present invention comprises the following steps:
A、将镁或镁合金在700～850℃下熔化，采用下拉法在连续定向凝固设备上以30～50mm/min的拉坯速度制备出外径为5.0～10.0mm、壁厚为1.0～2.0mm且内外表面光亮、具有连续柱状晶组织、冷加工性能优良的镁或镁合金管材。 A. Melt magnesium or magnesium alloy at 700-850°C, and use the down-draw method to prepare a blank with an outer diameter of 5.0-10.0mm and a wall thickness of 1.0-2.0mm on a continuous directional solidification equipment at a casting speed of 30-50mm/min. Magnesium or magnesium alloy pipes with bright inner and outer surfaces, continuous columnar grain structure, and excellent cold workability.
B、不经任何表面处理直接将镁或镁合金管材进行多道次拉拨加工，拉拨加工过程中无需进行中间退火或仅需少量低温退火，且拉拨加工是先进行1～15道次有芯拉拨，再进行1～15道次空拉拨，有芯拉拨和空拉拨的拉拨道次加工率均在1.2～1.5之间，最终获得外径为1.0～3.0mm、壁厚为0.1～0.5mm的镁或镁合金毛细管。 B. Without any surface treatment, the magnesium or magnesium alloy pipe is directly drawn for multiple passes. During the drawing process, no intermediate annealing or only a small amount of low-temperature annealing is required, and the drawing process is first carried out 1 to 15 times. The cored drawing is followed by 1 to 15 times of empty drawing. The processing rate of the drawing passes of the cored drawing and the empty drawing is both between 1.2 and 1.5, and finally the outer diameter is 1.0 to 3.0mm. Magnesium or magnesium alloy capillary with a thickness of 0.1-0.5 mm.
其中，本发明制备的连续定向凝固镁或镁合金管材的内外表面光亮，无需机加工、酸洗等处理，即可直接用于后续拉拔加工，并经过1～15道次有芯拉拔和空拉拔，短流程成形镁或镁合金毛细管；而且，可以根据需要在拉拔加工过程中实施1～2次低温退火，其退火温度低于镁或镁合金管材的再结晶温度。 Among them, the continuous directional solidification magnesium or magnesium alloy pipe prepared by the present invention has a bright inner and outer surface, and can be directly used for subsequent drawing processing without machining, pickling, etc., and after 1 to 15 passes of cored drawing and Empty drawing, forming magnesium or magnesium alloy capillary tubes in a short process; moreover, low-temperature annealing can be carried out 1 or 2 times during the drawing process according to needs, and the annealing temperature is lower than the recrystallization temperature of magnesium or magnesium alloy tubes.
实施例1：尺寸为f3.0×0.5mm的纯镁毛细管的制备方法 Embodiment 1: the preparation method of the pure magnesium capillary that size is f3.0 * 0.5mm
采用纯度为99.99%的镁在850℃下熔化，采用下拉法在连续定向凝固设备上以30mm/min的拉坯速度制备出f10.0×2.0mm的内外表面光亮、具有连续柱状晶组织的纯镁管材；将表面光亮的小直径薄壁纯镁管材直接进行带芯头盘拉，经过10道次拉拔成f4.0×0.35mm的管材，再经过3道次空拉拔成f3.0×0.5mm的纯镁毛细管。其中，拉拔道次延伸系数在1.2～1.5之间，润滑剂为植物油。 Magnesium with a purity of 99.99% is melted at 850°C, and the pure magnesium alloy with f10.0×2.0mm bright internal and external surfaces and continuous columnar crystal structure is prepared by the down-draw method on continuous directional solidification equipment at a casting speed of 30mm/min. Magnesium tubing: the small-diameter thin-walled pure magnesium tubing with a bright surface is directly drawn with a core head, and drawn into a tube of f4.0×0.35mm after 10 passes, and then drawn into a f3.0×0.5 through 3 passes mm of pure magnesium capillary. Wherein, the elongation coefficient of the drawing pass is between 1.2 and 1.5, and the lubricant is vegetable oil.
实施例2：尺寸为f2.0×0.35mm的纯镁毛细管的制备方法 Embodiment 2: the preparation method of the pure magnesium capillary that size is f2.0 * 0.35mm
采用纯度为99.99%的镁在750℃下熔化，采用下拉法在连续定向凝固设备上以40mm/min的拉坯速度制备出f7.5×1.0mm内外表面光亮、具有连续柱状晶组织的纯镁管材；将表面光亮的小直径薄壁纯镁管材直接进行带芯头盘拉，经过10道次拉拔成f4.0×0.35mm的管材，再经过3道次空拉拔成f2.0×0.35mm的纯镁毛细管。其中，拉拔道次延伸系数在1.2～1.5之间，润滑剂为植物油。 Magnesium with a purity of 99.99% is melted at 750°C, and pure magnesium with f7.5×1.0mm bright inner and outer surfaces and continuous columnar crystal structure is prepared by the down-draw method at a casting speed of 40mm/min on continuous directional solidification equipment Pipe material: The small-diameter thin-walled pure magnesium pipe with bright surface is directly drawn with a core head, and drawn into a pipe of f4.0×0.35mm after 10 passes, and then drawn into a f2.0×0.35mm pipe after 3 passes of empty drawing pure magnesium capillary. Wherein, the elongation coefficient of the drawing pass is between 1.2 and 1.5, and the lubricant is vegetable oil.
实施例3：尺寸为f1.0×0.1mm的纯镁毛细管的制备方法 Embodiment 3: the preparation method of the pure magnesium capillary that size is f1.0 * 0.1mm
采用纯度为99.99%的镁在700℃下熔化，采用下拉法在连续定向凝固设备上以50mm/min的拉坯速度制备出f5.0×1.0mm的内外表面光亮、具有连续柱状晶组织的纯镁管材；将表面光亮的小直径薄壁纯镁管材直接进行带芯头盘拉，经过3道次拉拔成f4.0×0.3mm的管材，再经过10道次芯杆拉拔成f1.0×0.1mm的纯镁毛细管。其中，拉拔道次延伸系数在1.2～1.5之间，润滑剂为植物油。 Magnesium with a purity of 99.99% is melted at 700 °C, and the pure magnesium alloy with f5. Magnesium tubing: the small-diameter thin-walled pure magnesium tubing with a bright surface is directly drawn with a core head, and then drawn into a tube of f4.0×0.3mm after 3 passes, and then drawn into a f1.0× through 10 passes of the core rod 0.1mm pure magnesium capillary. Wherein, the elongation coefficient of the drawing pass is between 1.2 and 1.5, and the lubricant is vegetable oil.
本发明是通过实施例来描述的，但并不对本发明构成限制，参照本发明的描述，所公开的实施例的其他变化，如对于本领域的专业人士是容易想到的，这样的变化应该属于本发明权利要求限定的范围之内。 The present invention is described by the embodiment, but does not constitute limitation to the present invention, with reference to the description of the present invention, other changes of the disclosed embodiment, if it is easy to imagine for those skilled in the art, such changes should belong to Within the scope defined by the claims of the present invention.
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| 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 |
| 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 |
| 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 |
| CN103878203B (en) * | 2014-03-20 | 2016-06-08 | 北京科技大学 | The preparation method of a kind of composite bimetal pipe |
| 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 |
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