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Stainless steel for medical instruments and preparation method thereof

A medical device and stainless steel technology, which is applied in the field of stainless steel for medical devices and its preparation, can solve the problems of unsatisfactory corrosion resistance and high temperature oxidation resistance of medical device materials, so as to avoid the decline of mechanical properties and enhance the corrosion resistance , the effect of high temperature resistance

Inactive Publication Date: 2019-12-06
长沙凯泽工程设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention proposes a medical device with high hardness and high strength, certain plastic toughness and excellent corrosion resistance, but the anti-corrosion performance and high-temperature oxidation resistance of the medical device material prepared by the invention are not satisfactory

Method used

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  • Stainless steel for medical instruments and preparation method thereof
  • Stainless steel for medical instruments and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A stainless steel for medical devices, the stainless steel for medical devices comprises the following components by weight percentage: C: 0.04, Mn: 0.04, Cr: 17, Ni: 7, Mo: 0.6, V: 0.04, Nb: 0.08, Al: 1.0, B+S+F: 0.015, Ag: 0.25, Cu: 0.25, Sn content = sum of Cu and Ag content, polysilicone: 0.02, nano silicate fiber: 0.003, and the rest is Fe. The ratio of B, S and F is 1:1:1.

[0024]According to the above-mentioned preparation method of stainless steel for medical devices, the following steps are included: mixing 50% C, B, and 50% Fe, heating to 1200° C. to melt to obtain the first molten liquid, and mixing S, 50% C, and 50% Fe Heat to 1200°C to melt to obtain the second molten liquid, mix Cu, Sn, and Ag and heat to 1700°C to obtain the third molten liquid, mix the first molten liquid and the second molten liquid at 1200°C and cool down After reaching 800°C, add polysilicone and nano-silicate fiber, heat up to 1700°C, mix evenly, keep warm for 1 hour, add the third...

Embodiment 2

[0026] A stainless steel for medical devices, the stainless steel for medical devices comprises the following components by weight percentage: C: 0.01, Mn: 0.06, Cr: 16, Ni: 8, Mo: 0.4, V: 0.0.5, Nb: 0.06, Al: 1.2, B+S+F: 0.01, Ag: 0.36, Cu: 0.14, Sn content = sum of Cu and Ag content, polysilicone: 0.03, nano silicate fiber: 0.002, and the rest is Fe.

[0027] According to the above-mentioned preparation method of stainless steel for medical devices, the following steps are included: mixing 50% C, B, and 50% Fe, heating to 1200° C. to melt to obtain the first molten liquid, and mixing S, 50% C, and 50% Fe Heat to 1200°C to melt to obtain the second molten liquid, mix Cu, Sn, and Ag and heat to 1700°C to obtain the third molten liquid, mix the first molten liquid and the second molten liquid at 1200°C and cool down After reaching 800°C, add polysilicone and nano-silicate fiber, heat up to 1700°C, mix evenly, keep warm for 1 hour, add the third molten liquid, keep warm for 1 ho...

Embodiment 3

[0029] A stainless steel for medical devices, the stainless steel for medical devices includes the following components by weight percentage: C: 0.07, Mn: 0.02, Cr: 18, Ni: 6, Mo: 0.8, V: 0.03, Nb: 0.1, Al: 0.8, B+S+F: 0.02, Ag: 0.14, Cu: 0.36, Sn content = sum of Cu and Ag content, polysilicone: 0.01, nano silicate fiber: 0.004, and the rest is Fe.

[0030] According to the above-mentioned preparation method of stainless steel for medical devices, the following steps are included: mixing 50% C, B, and 50% Fe, heating to 1200° C. to melt to obtain the first molten liquid, and mixing S, 50% C, and 50% Fe Heat to 1200°C to melt to obtain the second molten liquid, mix Cu, Sn, and Ag and heat to 1700°C to obtain the third molten liquid, mix the first molten liquid and the second molten liquid at 1200°C and cool down After reaching 800°C, add polysilicone and nano-silicate fiber, heat up to 1700°C, mix evenly, keep warm for 1 hour, add the third molten liquid, keep warm for 1 hour,...

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Abstract

The invention discloses stainless steel for medical instruments and a preparation method thereof. The stainless steel for the medical instruments comprises the following components of, in percentage by weight, 0.01%-0.07% of C, 0.02%-0.06% of Mn, 16%-18% of Cr, 6%-8% of Ni, 0.4%-0.8% of Mo, 0.03%-0.05% of V, 0.06%-0.1% of Nb, 0.8%-1.2% of Al, 0.01%-0.02% of B+S+F, 0.14%-0.36% of Ag, 0.14%-0.36% ofCu, the content of Sn is equal to the sum of the content of Cu and Ag, 0.01%-0.03% of silicones, 0.002%-0.004% of nanometer silicate fiber, and the balance of Fe. According to the stainless steel forthe medical instruments and the preparation method thereof, firstly, carrying out C, B and Fe alloying, S, C and Fe alloying, and Cu, Sn and Ag alloying on stainless steel for the medical instruments, and then obtaining the stainless steel through adding other components to carry out melt mechanical machining. The stainless steel for medical instruments and the preparation method thereof disclosed by the invention have the advantages that the hardness, the corrosion resistance and the high-temperature oxidation resistance of the medical instrument materials are improved.

Description

technical field [0001] The invention belongs to the technical field of medical metal materials, and in particular relates to a stainless steel for medical equipment and a preparation method thereof. Background technique [0002] Medical devices refer to instruments, equipment, utensils, in vitro diagnostic reagents and calibrators, materials, and other similar or related items that are directly or indirectly used on the human body, including required computer software; their effects are mainly obtained through physical means, not Acquired through pharmacological, immunological or metabolic means, or although these means are involved, they only play an auxiliary role. Stainless steel for medical devices needs to have excellent corrosion resistance, oxidation resistance, mechanical properties, toughness, plasticity, weldability and other properties. However, the medical devices currently on the market have poor mechanical properties and process properties, and low high-temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/08C22C49/14C22C47/08C21D8/06C22C101/06
CPCC21D8/065C22C47/08C22C49/08C22C49/14
Inventor 不公告发明人
Owner 长沙凯泽工程设计有限公司
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