Silver-containing austenitic antimicrobial stainless steel and manufacturing method thereof

Abstract

The invention relates to a silver-containing austenitic antimicrobial stainless steel which comprises the following chemical components in percentage by weight: at most 0.05% of C, at most 0.5% of Si, at most 1.0% of Mn, at most 0.03% of P, at most 0.005% of S, 8.0-10.0% of Ni, 18.0-20.0% of Cr, at most 0.05% of N, 0.07-0.13% of Ag, at most 0.01% of O, at least 0.03% of (Ag-10*O) and the balance of Fe and inevitable impurities. The manufacturing method of the stainless steel comprises the following steps: smelting stainless steel in an electric furnace-AOD (argon oxygen decarburization) or electric furnace-AOD-VOD (vacuum oxygen decarburization) mode, and continuously casting into a steel billet; carrying out hot rolling, wherein the initial temperature of hot rolling is 1200-1250 DEG C; and annealing by keeping the temperature of 1050-1100 DEG C for 1-2 minutes. The silver-containing austenitic stainless steel has the advantages of simple and effective smelting technique, favorable mechanical properties, favorable corrosion resistance and excellent antimicrobial performance.

Description

technical field [0001] The invention relates to an austenitic antibacterial stainless steel, in particular to a silver-containing austenitic antibacterial stainless steel and a manufacturing method thereof. Background technique [0002] Antibacterial stainless steel is to add an appropriate amount of metal elements (such as copper and silver) with antibacterial effect to stainless steel. After the steel produced is subjected to antibacterial heat treatment, the antibacterial phase rich in antibacterial elements is precipitated from the matrix, uniformly dispersed, and exposed to stainless steel. The antibacterial metal elements on the surface are dissolved in water to form hydrated ions, and then contact with bacteria, through the action of cells, damage the cell membrane, cause protein coagulation or damage its DNA, prevent the growth and reproduction of bacteria or eliminate bacteria. Antibacterial stainless steel has the advantages of stainless steel and good antibacteria...

AI Technical Summary

Problems solved by technology

CN1664154A added two antibacterial elements of silver and copper at the same time, but did not mention how to uniformly distribute the silver element in the specific method of the alloy, so the utilization efficiency and effect of the silver element are questionable

This method has an ideal effect, but it is not easy to grasp the best composition of Cu-Ag-Zn ternary master alloy, and Cu will affect the processing and performance of materials, and increase the cost of raw materials. In addition, Zn will also affect the thermal processing of stainless steel. performance is adversely affected

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