Heat treatment method of 304 type antibacterial stainless steel plate strip

Abstract

The invention relates to the 304 type stainless steel processing field, and specifically relates to a heat treatment method of a 304 type antibacterial stainless steel plate strip. The stainless steel comprises the following chemical components by weight: less than or equal to 0.03% of C, less than or equal to 1.00% of Si, less than or equal to 2.00% of Mn, less than or equal to 0.03% of S, less than or equal to 0.035% of P, 8.0-11.0% of Ni, 17.0-19.0% of Cr, 3.5-4.5% of Cu and balance of Fe; the heat treatment of the 304 type antibacterial stainless steel plate strip includes the following steps: 1, solution annealing of the 304 type antibacterial stainless steel plate strip, and air cooling; and step 2, placement of the annealed 304 type antibacterial stainless steel plate strip into a bell furnace filled with protective atmosphere for antibacterial aging precipitation of Cu rich phase, and air cooling to get a qualified product. After treatment with the method, the finished antibacterial stainless steel coiling plate strip can play antibacterial function to the greatest extent, and the corrosion resistance cannot be reduced.

Description

technical field [0001] The invention relates to the field of processing 304 type antibacterial stainless steel, in particular to a heat treatment method for rolled 304 type antibacterial stainless steel plate and strip. Background technique [0002] With the development of society and the improvement of living standards, the research, development and application of new antibacterial materials have attracted more and more attention. Since the 1990s, a variety of new materials with antibacterial functions (such as: antibacterial plastics, antibacterial metals, antibacterial fibers, etc.) have been developed and put on the market, which will undoubtedly bring great benefits to the general public. Antibacterial stainless steel stands out at this time. It is a kind of metal elements with bactericidal effect added to existing stainless steel materials, such as: copper, silver, etc., after special heat treatment, it has good mechanical properties, corrosion resistance and antibacte...

AI Technical Summary

Problems solved by technology

Improper antibacterial heat treatment system, the volume fraction of the precipitated copper-rich phase is too small, not enough to release enough copper ions through a small amount of corrosion behavior, or the volume fraction of the copper-rich phase is too large, which seriously damages the resistance of this type of material. corrosion performance

The original patents related to antibacterial stainless steel, such as: ZL02144683.0 (publication number CN1504588A) is not accurate enough for the description of antibacterial heat treatment. According to this patent, it is not enough to ensure that austenitic antibacterial stainless steel has a stable antibacterial function, especially antibacterial rolls of more than ton level. Stainless steel plate and strip

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