医用镁合金微管的拉拔工艺研究及拉拔模具的设计
摘要
根据成形工艺的不同,可以将镁合金材料大致分为变形及铸造镁合金两大类。铸造主要通过铸造加工满足镁合金产品。镁合金微管在合金结构中的地位很重要,因为它的作用很广泛,比如可替代铝合金和其他金属薄壁件,从而达到节省资源和降低重量的目的。目前己涉及的领域有摩托车工业、家用电器、纺织印刷、通讯、电子、航空、航天、汽车、包装、军工以及医学介入治疗等行业。
目前,针对医用镁合金微管的应用研究基本上集中于心血管支架。本文以生物可降解镁合金血管支架用薄壁微管加工为背景,根据镁合金优良的材料力学性能和加工性能,对其进行了拉拔成形工艺研究和拉拔模具设计。
关键词:镁合金,微管,生物可降解,生物相容性,拉拔
Research on Drawing Process and Drawing Die Design of
Medical Magnesium Alloy Capillary (Tube)
e
Abstract
According to different forming process, the magnesium alloy material is mainly divided into two categories: casting magnesium alloy and magnesium alloy. The former mainly through the casting for magnesium alloy products. Include sand casting, permanent mold casting, investment casting, lost foam casting, die casting, etc. The die casting is the most mature and most widely used technology.
Magnesium alloy microtubule is a kind of important magnesium alloy structural parts.
It can be used as an alternative to aluminum alloy and other metal thin pieces , and to achieve weight loss, energy saving effect. At present, It has been widely used munications, electronics, aviation, aerospace, automotive, motorcycle industry, household electrical
appliances, textile printing, packaging, military and medical intervention treatment industry.
To date, Medical magnesium alloy capillary’s research focused on cardiovascular stents. It was b
ased on the mini tube manufacturing process for biodegradable magnesium coronary stents. The magnesium alloy material with excellent mechanical properties and processing performance, has carried on the study on the forming process anddrawing die design.
Key words: Magnesium Alloy, Microtubule, Biodegradable , patibility, Drawing
目录
1绪论 1
引言 1
生物支架用微管材料 1
生物支架用镁合金微管 2
本课题研究的目的和意义 3
论文主要工作 3
2镁及镁合金 4
纯镁及镁合金的特性 4
镁合金的分类 4
3镁合金成形工艺 6
铸造镁合金的成形工艺 6
镁合金的塑性变形机制 6
镁合金塑性变化的滑移原理 6
镁合金塑性变化的孪生原理 7
变形镁合金的塑性加工技术 7
7
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