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Precipitation-hardening martensite antibacterial stainless steel for medical surgical operation

An antibacterial stainless steel, precipitation hardening technology, applied in the field of stainless steel materials, can solve problems such as bacterial infection, achieve the effect of inhibiting bacterial proliferation and increasing antibacterial effect

Active Publication Date: 2018-11-02
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

[0005] The purpose of the present invention is to provide a precipitation-hardened martensitic stainless steel for surgery with stronger antibacterial function, so as to solve the problem of bacterial infection caused by medical instruments in existing surgical operations

Method used

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  • Precipitation-hardening martensite antibacterial stainless steel for medical surgical operation
  • Precipitation-hardening martensite antibacterial stainless steel for medical surgical operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the heat treatment process of precipitation hardening martensitic antibacterial stainless steel is:

[0026] Insulate at 1050°C for 1 hour, cool to room temperature with water, make the gallium and copper in the steel supersaturated; then hold at 480°C for 6 hours to precipitate gallium-rich phase and copper-rich phase in the steel, and cool to room temperature in air.

[0027] According to "JIS Z 2801-2000 "antibacterial processed products - antibacterial test method and antibacterial effect", GB / T2591-2003 "antibacterial plastic antibacterial performance test method and antibacterial effect" and other standards, the new precipitation hardened martensite The antibacterial performance test of antibacterial stainless steel on typical bacteria, the results are:

[0028] (1) Antibacterial rate against Eschericher Coli: ≥97.9%, antibacterial effect such as figure 1 shown;

[0029] (2) Antibacterial rate against Staphyococcus aureus: ≥96.9%.

Embodiment 2

[0031] In this embodiment, the heat treatment process of precipitation hardening martensitic antibacterial stainless steel is:

[0032] Insulate at 1000°C for 1 hour, cool to room temperature with water, and then hold at 450°C for 10 hours to precipitate gallium-rich phase and copper-rich phase with sufficient volume fraction in the steel, then cool to room temperature with water.

[0033] According to "JIS Z 2801-2000 "antibacterial processed products - antibacterial test method and antibacterial effect", GB / T2591-2003 "antibacterial plastic antibacterial performance test method and antibacterial effect" and other standards, the new precipitation hardened martensite The antibacterial performance test of antibacterial stainless steel on typical bacteria, the results are:

[0034] (1) Antibacterial rate against Eschericher Coli: ≥99.1%;

[0035] (2) Antibacterial rate against Staphyococcus aureus: ≥99.5%;

Embodiment 3

[0037] In this embodiment, the heat treatment process of precipitation hardening martensitic antibacterial stainless steel is:

[0038] Insulate at 1100°C for 2 hours, cool to room temperature with water, then hold at 650°C for 3 hours, and cool to room temperature in air.

[0039]According to "JIS Z 2801-2000 "antibacterial processed products - antibacterial test method and antibacterial effect", GB / T2591-2003 "antibacterial plastic antibacterial performance test method and antibacterial effect" and other standards, the new precipitation hardened martensite The antibacterial performance test of antibacterial stainless steel on typical bacteria, the results are:

[0040] (1) Antibacterial rate against Eschericher Coli: ≥99.7%;

[0041] (2) Antibacterial rate against Staphyococcus aureus: ≥99.8%;

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PUM

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Abstract

The invention discloses precipitation-hardening martensite antibacterial stainless steel for a medical surgical operation. The precipitation-hardening martensite antibacterial stainless steel comprises the following chemical compositions of, by weight, no more than 0.03% of C, no more than 1.00% of Si, no more than 1.00% of Mn, no more than 0.040% of P, no more than 0.030% of S, 3.0-5.0% of Ni, 16.0-18.0% of Cr, 3.0-5.0% of Cu, 0.50-1.50% of Ga, 0.05-0.15% of N, 0.15-0.45% of Nb, and the balance Fe. After the stainless steel is subjected to special heat treatment, a composite antibacterial phase (a copper-rich phase and a gallium-rich phase) can be precipitated dispersively in a stainless steel base body; through the presence of the gallium-rich phase, the promoting effect of dissolution of the iron element in the stainless steel on the cell metabolism ability of bacteria can be effective inhibited; meanwhile, as for the gallium-rich phase, trace gallium ions are easier to dissolve through, and the stainless steel has the higher antibacterial function through the gallium ions and copper ions; according to the precipitation-hardening martensite antibacterial stainless steel, the problem of bacterial infection due to use of stainless steel tools in existing surgical operations is solved, and the precipitation-hardening martensite antibacterial stainless steel can be widely applied to various types of stainless steel equipment, such as scalpels, surgical shears, surgical forceps, bowel forceps and curets in the surgical operations, used in medical clinical fields.

Description

technical field [0001] The invention relates to the field of stainless steel materials, in particular to a precipitation hardening martensitic stainless steel for medical surgery. The stainless steel has a stronger antibacterial function and can be widely used in various stainless steel instruments used in surgical operations in the medical clinical field. Background technique [0002] Surgical instruments are usually made of stainless steel, and martensitic stainless steel has an obvious advantage in the selection of surgical instrument materials due to its excellent strength and toughness. Precipitation-hardening martensitic stainless steel has been widely used because of its good mechanical properties, such as surgical knives (surgical blades, skin blades, razors, pedicures), surgical scissors (surgical scissors, tissue scissors, dissecting scissors) ), surgical forceps (hemostatic forceps, tissue forceps, wound clamps), surgical forceps (small blood vessel forceps, tiss...

Claims

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Application Information

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IPC IPC(8): C22C38/42C22C38/48C21D6/00
CPCC21D6/004C21D2211/008C22C38/001C22C38/002C22C38/42C22C38/48
Inventor 杨春光赵金龙杨柯席通
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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