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Medical free nickel high nitrogen stainless steel material and preparation and application thereof

A high-nitrogen stainless steel and stainless steel technology, used in medical science, prosthesis and other directions, can solve the problem of the need to improve corrosion resistance, and achieve the effect of low cost, excellent corrosion resistance and good wear resistance.

Inactive Publication Date: 2007-11-28
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In China, the Institute of Metal Research, Chinese Academy of Sciences took the lead in carrying out research on nitrogen-enhanced austenitic nickel-free stainless steel. The authorized patent is "a medical implantable austenitic stainless steel material" (patent number: 03110896.2), and the medical nickel-free austenitic stainless steel protected by it is The Nitrogen content of Nistenitic stainless steel is 0.4%~0.7% (mass content), which shows good mechanical properties and biological compatibility, but its corrosion resistance still needs to be improved, and corrosion resistance is an important biomedical implant material. one of the performance

Method used

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  • Medical free nickel high nitrogen stainless steel material and preparation and application thereof

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Embodiment

[0030] Embodiment: According to the set chemical composition scope of the present invention, in 100 kilograms of pressurization induction furnace+electroslag furnace refining, each 60 kilograms of altogether 2 furnace steels (respectively being No. 1 and No. 2 alloys), adopt pressurized electroslag weight The melting furnace smelted 40 kg of 1 batch of steel (alloy No. 3), and on the basis of the stainless steel with medium nitrogen content protected by the patent 03110896.2, obtained high nitrogen content stainless steel through high temperature nitriding (1200 ° C, 3 atmospheric pressure, 24 hours). Alloy No. 4 illustrates the contribution of increasing nitrogen content to corrosion resistance by comparison, and its specific chemical composition is shown in Table 1. These 4 furnaces of steel were respectively poured into a φ120×450 steel ingot, and processed according to the above processing and heat treatment specifications.

[0031] Stainless steel

C

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Abstract

The present invention relates to medical stainless steel implant material, and is especially one kind of medical no-nickel stainless steel material. Chemically, the medical no-nickel stainless steel material includes Cr 17-24 wt%, Mn 12-20 wt%, Mo 1-3 wt%, Cu 0.5-1.0 wt%, N 0.71-1.20 wt%, C not more than 0.03 wt% and Fe for the rest. The medical no-nickel stainless steel material containing no toxic Ni element may be used in surgical implant, medical equipment, food appliance, ornament and other product contacting direct to human body, and may be also used in chemical, environment protecting and other fields.

Description

technical field [0001] The invention relates to a medical implant stainless steel material, in particular to a medical nickel-free high-nitrogen stainless steel material and its preparation and application. Background technique [0002] Medical implant stainless steel is the most widely used biomedical material, but it usually contains toxic nickel (Ni) element. For example, the medical 316L stainless steel commonly used in clinic currently contains 10-14% nickel. After it is implanted into the human body, when the passivation layer or protective layer on the surface is damaged due to corrosion or wear, the metal nickel ions are easily Accumulated in the tissue near the implant, affecting the normal metabolism of the organism. Nickel is a potential sensitizing factor, which has teratogenic and carcinogenic hazards to organisms. There have been reports on nickel allergy and carcinogenesis for a long time. The enrichment of nickel ions near implants in vivo can induce toxicit...

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Application Information

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IPC IPC(8): A61L27/04
Inventor 任伊宾杨柯张炳春杨慧宾肖克沈
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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