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An ultra-high antibacterial performance austenitic stainless steel for medical implant stents

An austenitic stainless steel and performance technology, applied in the field of ultra-high antibacterial performance austenitic stainless steel materials and their preparation, can solve the problems of human health impact, reduced service life time, inability to apply, etc. Effect

Active Publication Date: 2020-02-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large number of bacteria in the postoperative site caused strong corrosive damage, and caused a huge health impact on the human body, making the proliferation of postoperative bacteria and the corrosion behavior of stainless steel implants widely concerned.
Therefore, the service life of 316LN austenitic stainless steel is greatly reduced. It is necessary to use antibacterial functional 316LN-Cu austenitic stainless steel for the postoperative human environment containing bacterial microorganisms. However, it is limited by the current antibacterial functional stainless steel. The influence of antibacterial properties, the long time to kill bacteria and the limitation of the concentration range of inhibiting bacteria cannot make the traditional antibacterial functional 316LN-Cu austenitic stainless steel be effectively applied.

Method used

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  • An ultra-high antibacterial performance austenitic stainless steel for medical implant stents
  • An ultra-high antibacterial performance austenitic stainless steel for medical implant stents
  • An ultra-high antibacterial performance austenitic stainless steel for medical implant stents

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Embodiment Construction

[0026]According to the chemical composition range set by the ultra-high antibacterial performance austenitic stainless steel material, the present invention adopts 15 kilograms of vacuum induction furnace to smelt the embodiment and comparative example to forge 10 kilograms of ultra-high antibacterial performance austenitic stainless steel respectively, and its chemical composition is shown in Table 1 .

[0027] The main chemical composition (wt.%) of the austenitic stainless steel of table 1 embodiment and comparative example

[0028]

[0029] According to the parameter range of the heat treatment method set by the ultra-high antibacterial performance austenitic stainless steel of the present invention, the detailed parameters of the solid solution and aging heat treatment formulated are shown in Table 2.

[0030] The heat treatment process parameter of table 2 embodiment and comparative example

[0031]

[0032] 1. In vitro antibacterial performance test

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Abstract

The invention aims to provide an ultrahigh-antibacterial-performance austenitic stainless steel material applied to a medical implantable stent and a preparation method thereof. The ultrahigh-antibacterial-performance austenitic stainless steel material has an effective function of resisting to high-concentration bacteria (>(8-9)*10<6> CFU / mL) in the heat treatment state of solution treatment andaging, and the risk of corrosion of bacteria microorganisms caused by the use of austenitic stainless steel can be remarkably reduced. The stainless steel comprises the following chemical components of, by weight, 16.0%-17.5% of Cr, 10.0%-14.0% of Ni, 2.0%-3.0% of Mo, 2.5%-4.5% of Cu, 1.0%-2.5% of Ga, 0.1%-0.15% of N, less than or equal to 0.03% of C, less than or equal to 0.75% of Si, less than or equal to 2.0% of Mn, less than or equal to 0.045% of P, less than or equal to 0.03% of S and the balance Fe. The ultrahigh-antibacterial-performance austenitic stainless steel is widely applied to material of the medical implantable stent, and specifically applied to medical implantable stent products such as a cardiovascular stent, a urethra stent, an intestinal stent and a bile duct stent.

Description

technical field [0001] The invention belongs to the field of biomedical materials, and relates to a variety of stainless steel medical brackets, in particular to the technical field of austenitic stainless steel materials, specifically a super-high antibacterial performance austenitic stainless steel material used in medical implant brackets and its preparation method. Background technique [0002] Medical stent implantation is one of the important methods to treat diseases such as stenosis and blockage of organoids transported through the human body. The implantation of stents can support and dredge the diseased area. Since its appearance, it has received widespread attention. Stent products have the characteristics of high flexibility, good traceability, anti-thrombosis, high degree of biocompatibility, high support strength and small surface area. At present, stent products are usually made of metal alloys such as stainless steel or Nitinol. Due to their metal structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/42C22C38/44C22C38/02C22C38/04C22C33/04C21D8/00A61L31/02A61L31/14
CPCA61L31/022A61L31/14C21D8/005C21D2211/001C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/42C22C38/44
Inventor 赵金龙席通杨柯杨春光
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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