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Antibacterial austenitic stainless steel

An antibacterial stainless steel and austenite technology, which is applied in the field of nickel-saving and chromium-saving antibacterial stainless steel and austenitic antibacterial stainless steel, can solve the problems of decreased corrosion resistance of materials, no environmental protection sterilization effect, difficulty in controlling the amount of addition and particle size, etc. To achieve the effect of improving antibacterial ability

Active Publication Date: 2008-08-13
YONGXING SPECIAL STAINLESS STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too much dosage will lead to a decline in the corrosion resistance of the material, and it is difficult to control the amount and particle size of the actual addition
[0003] In addition, current practical stainless steel also needs to save nickel and chromium, such as shaped steel UNS20100, UNS20103, UNS20153, UNS20161, UNS20200, UNS20400 and patents ZL93106802.9, ZL95111105.1, ZL01111434.7, etc. But there is no environmental sterilization effect

Method used

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  • Antibacterial austenitic stainless steel

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Experimental program
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Effect test

Embodiment

[0013] figure 1 .Comparison of silver with copper and silver without copper in the alloy. 1. Transport liquid, 2. Bacteria, 3. Passive film, 4. Stainless steel, 5. Silver atom, 6. Copper ion, 7. Silver ion, 8. Surface ε-Cu, 9. Dissolved into silver, 10. Internal ε-Cu.

[0014] Use vacuum induction furnace or electric furnace-AOD duplex to smelt stainless steel, cast billets, quench in solution water at 1150°C after forging, aging treatment at 400-700°C, pickling and rust removal, cold rolling to 1mm, annealing, pickling, polishing surface.

[0015] Evaluate the corrosion resistance of stainless steel through the cycle of the following three steps: (1) Spray 5% NaCl aqueous solution at 35°C for 0.5 hours; (2) Store at 60°C and 40% humidity for 1 hour; (3) Store at 40°C and 95% humidity for 1 hour. The three stages are one cycle, and after 30 cycles, the area ratio of the corrosion of the test piece is measured.

[0016] Assess the antibacterial test, according to the Pharm...

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Abstract

The invention relates to a sort of austenitic antibiotic stainless steel, characterized in that it saves the nickel and chromium. The percentage by weight of its chemical composition is: C: 0.03-0.15, Cr: 11-15, Ni: 1.0-3.5, Mn: 7.0-15.0, N: 0.06-0.3, Cu: 1.0-3.0, Ag: 0.01-0.1, Nb: 0-0.10, S<=0.02, P<=0.03, Si: 0.1-1, the balance is Fe. Said invention uses cuprum as the carrier and makes the silver crossing the passivating film, which improves the antibiotic ability through the coupulation of the cuprum and silver, and fills manganese, carbon, columbium to ensure the steel has enough corrosion resistance and austenite tissue. The invention can be used for making water supply pipes, kitchen utensils, medical equipments, architectural electric appliances and so on.

Description

technical field [0001] The invention relates to the manufacture of stainless steel, especially an austenitic antibacterial stainless steel, more specifically nickel-saving and chromium-saving antibacterial stainless steel. This kind of stainless steel is environmentally friendly and sterilizable, and the price is low. Construction appliances, etc. technical background [0002] Environmental protection is the need for sustainable social development, and health is the subject of human society's concern. The MRS infection in Japan in 1996 and the discovery of SARS in China in 2003 were world-renowned and shocked the world, which aroused people's attention to sanitation and sterilization. Patents JPA Ping 8-49085 and ZL200410027063.2 propose magnetron sputtering of silver-rich or copper-rich or titanium-rich metal layers on stainless steel surfaces; JPA Ping 8-156175 coats antibacterial silver pigments on steel plates. However, this coating is easy to fall off when rolling and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/48
Inventor 刘文西陈玉如刘洁
Owner YONGXING SPECIAL STAINLESS STEEL
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