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Antibacterial and antiviral ferritic stainless steel and preparation method thereof

A ferritic and stainless steel technology, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of antibacterial performance decline, etc., and achieve the effect of equivalent corrosion resistance, excellent mechanical properties and high plasticity

Inactive Publication Date: 2021-08-17
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, antibacterial stainless steel mainly added Cu element, and the ε-Cu phase was precipitated after antibacterial treatment to have antibacterial properties, but the antibacterial performance will decrease with time

Method used

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  • Antibacterial and antiviral ferritic stainless steel and preparation method thereof
  • Antibacterial and antiviral ferritic stainless steel and preparation method thereof

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preparation example Construction

[0033] A kind of preparation method of antibacterial toxic ferritic stainless steel of the present invention comprises the following steps:

[0034] a. Weigh raw materials according to the following mass percentage: C: 0.06~0.08%, Si≤0.50%, Mn≤1.0%, S≤0.020%, P≤0.030%, Cr: 16.5~17.5%, Ni≤0.60%, N ≤0.1%, Ag: 0.01~0.06%, RE: 0.010~0.045, the rest is iron and unavoidable impurities; wherein RE is at least one rare earth element among La and Ce;

[0035]b. The raw materials taken in step a are pretreated by molten iron, primary smelting furnace (electric arc furnace, AOD smelting, induction furnace), refining outside the furnace, continuous casting (forging), hot rolling (cold rolling) process to obtain stainless steel plates, rods and wires of required specifications; after continuous casting (forging) and hot rolling (cold rolling), an annealing process is set up respectively, and annealing treatment is performed after cold rolling, and finally antibacterial and poisonous ferrit...

Embodiment 1

[0046] Embodiment 1: In this embodiment, an antibacterial and poisonous ferritic stainless steel, the chemical composition of which is shown in Table 1.

[0047] In this embodiment, the preparation method of antibacterial and poisonous ferritic stainless steel of this embodiment includes the following steps:

[0048] a. Weigh the raw materials according to the prepared target stainless steel component mass percentage with the composition of Table 1:

[0049] C:0.07%, Si:0.27%, Mn:0.40%, S:0.001%, P:0.012%, Cr:17.00%, Ni:0.20%, N:0.06%, Ag:0.030%, La+Ce:0.017 %, the rest is iron and unavoidable impurities;

[0050] b. The raw materials taken in the step a are subjected to a series of processes of molten iron pretreatment, AOD refining, LF refining, continuous casting, hot rolling, and cold rolling to obtain stainless steel plates of required thickness; After the cold rolling, an annealing process is set respectively, and after the cold rolling, the annealing treatment is carr...

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Abstract

The invention discloses an antibacterial and antiviral ferritic stainless steel and a preparation method thereof. According to the invention, multiform alloying silver elements and rare earth elements are distributed in a ferritic structure; the silver elements are naturally activated by the environment to form silver ions with different valence states, and the silver ions can act on bacteria and virus independently or in a combined mode; so that bacteria respiration is inhibited, or a virus structure is damaged; and therefore the bacteria and virus is killed; and the rare earth elements can increase the corrosion resistance of the steel and improve the antibacterial activity of the steel at the same time, and the requirements of kitchens and bathrooms, household appliances, household appliance parts, tableware, other public facilities and the like for stainless steel materials are met advantageously.

Description

technical field [0001] The invention relates to broad-spectrum anti-virus and anti-bacteria iron and steel material technology, especially an antibacterial and poisonous ferritic stainless steel and its preparation method. By distributing polymorphic alloying silver elements and rare earth elements in the ferrite structure, the Silver elements are naturally activated by the environment into different valence silver ions, which can act on bacteria and viruses alone or in combination, inhibit bacterial respiration or destroy virus structures, thereby killing bacteria and viruses. The rare earth elements can increase the corrosion resistance of steel and at the same time improve The antibacterial activity of steel is beneficial to meet the demand for stainless steel materials such as kitchen and bathroom, household appliances, home appliance parts, tableware and other public facilities. Background technique [0002] Bacteria and viruses are easily adsorbed on kitchens and bathr...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/40C21D1/26C21D6/00C21D8/02C21D8/06C21D9/00C22C33/04
CPCC22C38/007C22C38/005C22C38/02C22C38/04C22C38/001C22C33/04C21D1/26C22C38/40C21D6/004C21D6/005C21D6/008C21D8/0221C21D8/065C21D9/0081C21D9/0075
Inventor 董瀚彭伟
Owner SHANGHAI UNIV
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