Ferritic stainless steel with strong antibacterial function

Abstract

The invention aims to provide a novel ferritic stainless steel material with a strong antibacterial function. Compared with traditional ferritic stainless steel, the antibacterial function of the ferritic stainless steel is further improved in the heat treatment state of solid solution and aging, the antibacterial rate can reach 99.9%, and the risks of corrosion of bacteria and microorganisms andsecondary pollution of water caused in the use process of the ferritic stainless steel are remarkably reduced. The stainless steel is prepared from the following chemical components in percentage by weight: 16.5-20.0% of Cr, 1.0-3.0% of Cu, 0.8-1.5% of Nd, no greater than 0.025% of C, no greater than 1.0% of Si, no greater than 1.0% of Mn, no greater than 0.04% of P, no greater than 0.03% of S andthe balance of Fe. The ferritic stainless steel with the strong antibacterial function can become an excellent substitute product of the existing ferritic stainless steel.

Description

technical field [0001] The invention relates to the technical field of ferritic stainless steel materials, in particular to invent a ferritic stainless steel with strong antibacterial function. Background technique [0002] In the application field of stainless steel, ferritic stainless steel can be used as a substitute material for austenitic stainless steel. It has the characteristics of large thermal conductivity, small expansion coefficient, good oxidation resistance, and excellent stress corrosion resistance. , water and oxidizing acid corroded parts or closed containers. Ferritic stainless steel does not contain Ni, and its main elements are Cr (>12%) and Fe. Cr is the main element for corrosion resistance of stainless steel, and its price is relatively low and relatively stable. Since ferritic stainless steel is suitable for both cold water and hot water medium environments, it has a good market application in liquid storage containers and pipelines. Also, it has...

AI Technical Summary

Problems solved by technology

At present, the application of antibacterial functional stainless steel has already achieved an antibacterial performance of up to 99.9% against common Gram-positive bacteria and Gram-negative bacteria, but for some microorganisms contained in water (such as Bacillus subtilis, Bacillus pumilus etc.) are still limited in antibacterial performance (see Table 1), based on the above background, a ferritic stainless steel with strong antibacterial function is developed, so that it can more quickly and effectively target more types of bacteria in water. Inhibition will be able to prevent the introduction of bacteria at the root, and will play an important role in the health of the human body and the cost of the production industry

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