Austenitic stainless steel with excellent anti-bacterium capability

A technology of austenitic stainless steel and characteristics, applied in the field of austenitic stainless steel, can solve the problems of increasing cost, reducing stainless steel corrosion resistance, corrosion resistance decline, etc., to meet the requirements of guaranteed corrosion resistance, excellent antibacterial function, excellent antibacterial performance effect

Inactive Publication Date: 2007-10-17
辽宁国瑞商贸有限公司
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  • Abstract
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Problems solved by technology

However, Ag is expensive, and its solubility in stainless steel is extremely low. It is difficult to obtain sufficient yield with conventional metallurgical technology, and the use of special smelting technology will greatly increase the cost; Cu antibacterial can be realized by supersaturated solid solution precipitation. The dispersion distribution of phases in stainless steel, the more precipitated phases, the stronger the antibacterial performance
However, the existence of Cu precipitates on the surface will significantly reduce the corrosion resistance of stainless steel, the more precipitates, the more obvious the decline in corrosion resistance

Method used

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  • Austenitic stainless steel with excellent anti-bacterium capability
  • Austenitic stainless steel with excellent anti-bacterium capability

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Embodiment Construction

[0016] Sample preparation: according to the composition of the austenitic antibacterial stainless steel of the present invention, smelt with a 25kg vacuum induction furnace, then through forging, hot rolling and annealing, repeated cold rolling-annealing-pickling, to make a 0.8mm plate, the plate is in After being kept at 1050° C. for 7 minutes in a vacuum furnace, aging was performed at 700° C. for 6 hours. A sample of 40×40 mm was cut from the above plate, and then tested for antibacterial performance. The cast sample is smelted in a 25kg vacuum induction furnace, and an 8mm thick test piece is cut in the direction perpendicular to the ingot axis. The above heat treatment process is adopted, and then processed into a 40×40×5mm antibacterial test sample.

[0017] Antibacterial performance test: The antibacterial test adopts the antibacterial test method of the Japan Antibacterial Association "Japanese Industrial Standard: Antibacterial Test Method and Antibacterial Effect of ...

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Abstract

An austenite stainless steel with excellent antisepsis feature is characterized in containing 0.0005-0.20wt% Ag and 2.5-4.5 wt% Cu at the same time, wherein Ag exists in the form of fine Ag grains, oxide or sulfide and Cu partially or most exists in the form of Cu-enriched deposit. The invention solves the problems in techniques, cost and properties by only adding antiseptic elements, which hence further improves the antisepsis functions of the materials and optimizes the comprehensive performances thereof.

Description

Technical field: [0001] The invention relates to austenitic stainless steel, which is an antibacterial stainless steel containing two antibacterial elements Ag and Cu, has excellent long-term antibacterial function, and can be applied to various fields that require antibacterial in daily life, such as kitchen equipment, catering utensils, Medical equipment, food processing and pharmaceutical machinery, and public facilities, etc. Background technique: [0002] With the development of society and the improvement of people's living standards, the antibacterial industry has developed rapidly. However, most of the antibacterial products on the market are antibacterial plastics, antibacterial ceramics, antibacterial fabrics, etc. made by adding antibacterial agents, and there are few metal antibacterial materials with high strength and high temperature resistance. Antibacterial stainless steel has antibacterial function, decorative and beautifying function and structural materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C38/42C22C38/50C21D11/00
Inventor 吴平森
Owner 辽宁国瑞商贸有限公司
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