Deyuan Zhang,Wenjiao Lin,Xiangdong Liu,Wenbin Wang
申请号：
US14391934
公开号：
US09878072B2
申请日:
2013.04.11
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A bioabsorbable medical device or a medical device component comprises an absorbable component prepared by subjecting a prefabricated component of an iron-based raw material to ion nitriding. Substance composition inside the absorbable component changes with the depth from the surface. The absorbable component comprises at least a first part and a second part. The first part surrounds the second part. Hardness of the first part is higher than hardness of the second part. An interface exists between the first part and the second part. A crack generated in the first part is impeded by the interface when extending to the second part. On the premise of ensuring radial stand strength, the bioabsorbable medical device or medical device component and a preparation method thereof reduce wall thickness of an iron-based stand, improve a stand corrosion rate and malleability, and achieve broader adaptability.
