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A kind of martensitic antibacterial stainless steel

An antibacterial stainless steel and martensite technology, applied in the field of stainless steel materials, can solve the problem of low antibacterial concentration, and achieve the effects of inhibiting bacterial proliferation, strong antibacterial performance, and increasing antibacterial effect.

Active Publication Date: 2019-12-27
广东金辉刀剪股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a martensitic antibacterial stainless steel to solve the problem of relatively low antibacterial concentration of existing materials

Method used

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  • A kind of martensitic antibacterial stainless steel
  • A kind of martensitic antibacterial stainless steel
  • A kind of martensitic antibacterial stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The heat treatment process of the antibacterial stainless steel of embodiment 1 is:

[0031] Incubate at 900 °C for 1 h, and after water cooling to room temperature, the Ga in the steel is in a supersaturated state;

[0032] According to "JIS Z 2801-2000 "Antibacterial Processed Products - Antibacterial Test Methods and Antibacterial Effects", GB / T2591-2003 "Antibacterial Properties of Antibacterial Plastics Test Methods and Antibacterial Effects" and other standards, and choose a bacterial concentration of 10 7 CFU / mL. The antibacterial properties of typical bacteria were tested, and the results were:

[0033] (1) Antibacterial rate to Eschericher Coli: ≥91.4%;

[0034] (2) Antibacterial rate against Staphylococcus aureus: ≥92.5%.

Embodiment 2

[0036] In the present embodiment, the heat treatment process of antibacterial stainless steel is:

[0037] Incubate at 940°C for 2h, and after water cooling to room temperature, make the Ga in the steel in a supersaturated state; then keep at 350°C for 4h to precipitate a sufficient volume fraction of Ga-rich phase in the steel, and air-cool to room temperature. For typical bacteria (bacteria concentration of 10 7 CFU / mL) antibacterial performance test, the results are:

[0038] (1) Antibacterial rate to Eschericher Coli: ≥94.8%;

[0039] (2) Antibacterial rate against Staphylococcus aureus: ≥95.4%.

Embodiment 3

[0041] In the present embodiment, the heat treatment process of antibacterial stainless steel is:

[0042] Incubate at 960°C for 3h, and after water cooling to room temperature, make the Ga in the steel in a supersaturated state; then keep at 200°C for 5h to precipitate a sufficient volume fraction of Ga-rich phase in the steel, and air-cool to room temperature. For typical bacteria (bacteria concentration of 10 7 CFU / mL) antibacterial performance test, the results are:

[0043] (1) Antibacterial rate to Eschericher Coli: ≥95.7%;

[0044] (2) Antibacterial rate against Staphylococcus aureus: ≥96.8%.

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Abstract

The invention discloses martensite antibacterial stainless steel, and belongs to the technical field of the stainless steel materials. The stainless steel comprises the following chemical components of, by weight, 0.05-0.25% of C, less than or equal to 1.00% of Si, less than or equal to 1.00% of Mn, less than or equal to 0.03% of P, less than or equal to 0.03% of S, 0.05-0.15% of N, 12.0-14.0% ofCr, 1.0-3.0% of Cu, 0.5-1.5% of Ga and the balance Fe. The stainless steel is subjected to special heat treatment, then, composite antibacterial phases (a copper-rich phase and a gallium-rich phase) can be dispersed and separated out in a stainless steel matrix, the existence of the gallium-rich phase can effectively inhibit the effect of promoting the metabolism capability of bacterial cells dueto dissolution of iron elements in the stainless steel, meanwhile, the gallium-rich phase can dissolve out of trace gallium ions easily, and the gallium ions together with copper ions enable the stainless steel to have a stronger antibacterial function. The martensite antibacterial stainless steel solves the problem of bacterial infection caused by the use of stainless steel instruments, and can be widely applied to various stainless steel instruments used in cutting fields such as knives, shears and the like.

Description

technical field [0001] The invention relates to the field of stainless steel materials, and particularly provides a martensitic antibacterial stainless steel. Background technique [0002] The existing copper-containing antibacterial stainless steel generally uses the trace copper ions released during the contact between the stainless steel and the medium solution environment to participate in the bacterial killing process, thereby effectively inhibiting bacterial proliferation and reducing the infection risk caused by it. As we all know, knives and scissors, especially scalpels and surgical scissors, are usually made of martensitic stainless steel. If the existing copper-containing martensitic antibacterial stainless steel is used, it can theoretically effectively reduce the bacteria caused by bacterial proliferation. The risk of infection, but in practical application, there are still the following shortcomings: (1) The inhibitory effect of copper-containing martensitic an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/20C22C38/02C22C38/04C22C33/04C21D8/00
CPCC21D8/005C21D2211/008C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/20
Inventor 杨春光赵金龙杨柯席通
Owner 广东金辉刀剪股份有限公司
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