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Antibacterial medical stainless steel

A stainless steel, 0.5-1 technology, applied in the field of alloy materials, can solve the problems of chronic osteomyelitis, long-lasting wounds of patients, heavy economic burden of patients, etc., and achieve the effect of low price

Inactive Publication Date: 2016-02-10
常州凯翔医用不锈钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Postoperative infection in orthopedics will directly cause the patient's wound to not heal for a long time, often lead to operation failure, and even lead to complications such as chronic osteomyelitis. Negative impacts of varying degrees on society

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Antibacterial medical stainless steel, by weight percentage, the chemical composition of the antibacterial medical stainless steel is: C: 0.06, Mn: 6, Cr: 18, Ti, 0.5, Mo: 0.5, N: 0.3, Cu: 3, P: 0.02, S: 0.02, the balance is impurities and iron; the surface of stainless steel is covered with TiO 2 film.

[0020] The preparation method of antibacterial medical stainless steel is characterized in that it comprises the following heat treatment steps:

[0021] Step 1, after completely melting iron and C: 0.06, Mn: 6, Cr: 18, Ti, 0.5, Mo: 0.5, Cu: 3, P: 0.02, S: 0.02 into molten steel, blowing nitrogen into the molten steel;

[0022] Step 2, the molten steel in step 1 is kept at 1000°C for 1 hour to fully dissolve the copper in the stainless steel, and then cooled to room temperature to make the copper in the stainless steel in a supersaturated state; reheat the aforementioned stainless steel to 600°C and keep it warm for 2 hours to make Supersaturated copper precipitates ...

Embodiment 2

[0027] Antibacterial medical stainless steel, by weight percentage, the chemical composition of the antibacterial medical stainless steel is: C: 0.075, Mn: 8, Cr: 20, Ti, 0.7, Mo: 0.5-1, N: 0.45, Cu: 4, P: 0.25, S: 0.02, the balance is impurities and iron; the surface of stainless steel is covered with TiO 2 film.

[0028] The preparation method of antibacterial medical stainless steel is characterized in that it comprises the following heat treatment steps:

[0029] Step 1, after melting iron and C: 0.075, Mn: 8, Cr: 20, Ti, 0.7, Mo: 0.5-1, Cu: 4, P: 0.25, S: 0.02 into molten steel, blow into molten steel Nitrogen;

[0030] Step 2, the molten steel in step 1 is kept at 1050°C for 1.2 hours to fully dissolve the copper in the stainless steel, and then cooled to room temperature to make the copper in the stainless steel in a supersaturated state; reheat the aforementioned stainless steel to 700°C and keep it warm for 3 hours to make Supersaturated copper precipitates a suffi...

Embodiment 3

[0035] Antibacterial medical stainless steel, by weight percentage, the chemical composition of the antibacterial medical stainless steel is: C: 0.08, Mn: 10, Cr: 22, Ti, 1, Mo: 1, N: 0.5, Cu: 5, P: 0.03, S:0.03, the balance is impurities and iron; the surface of stainless steel is covered with TiO 2 film.

[0036] The preparation method of antibacterial medical stainless steel comprises the following heat treatment steps:

[0037] Step 1, after melting iron and C: 0.08, Mn: 10, Cr: 22, Ti, 1, Mo: 1, Cu: 5, P: 0.03, S: 0.03 into molten steel completely, blow nitrogen into the molten steel;

[0038] Step 2, the molten steel in step 1 is kept at 1100°C for 1.5 hours to fully dissolve the copper in the stainless steel, and then cooled to room temperature to make the copper in the stainless steel in a supersaturated state; reheat the aforementioned stainless steel to 800°C and keep it warm for 5 hours to make Supersaturated copper precipitates a sufficient amount of copper-rich ...

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PUM

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Abstract

The invention discloses an antibacterial medical stainless steel. The antibacterial medical stainless steel comprises, by weight, 0.06 to 0.08% of C, 6 to 10% of Mn, 18 to 22% of Cr, 0.5 to 1% of Ti, 0.5 to 1% of Mo, 0.3 to 0.5% of N, 3 to 5% of Cu, less than 0.03% of P, less than 0.03% of S, and the balance impurities and iron. The surface of the antibacterial medical stainless steel is coated with a TiO2 thin film. The antibacterial medical stainless steel has corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to an antibacterial medical stainless steel. Background technique [0002] Due to its excellent strength, toughness, bending fatigue resistance, good processing performance, and low cost, stainless steel is widely used in artificial joints (knees, knees, shoulders, ankles, elbows, wrists, knuckles, etc.), bone trauma products ( Intramedullary nails, steel plates, screws, etc.), spinal orthopedic internal fixation systems and other orthopedic implant products, as well as orthodontic products (brackets, rings, orthodontic archwires, implants for anchorage) and interventional cardiovascular stents Medical devices such as therapeutic device products. 316L, 317L, 304, etc. are typical representatives of medical stainless steel. [0003] However, as a common postoperative complication, bacterial infection caused by medical devices such as medical stainless steel has become one o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C33/04C21D1/18C23C14/08
Inventor 黄玉祥
Owner 常州凯翔医用不锈钢有限公司
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