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Austenitic antibiotic stainless steel and method for manufacturing same

A technology of antibacterial stainless steel and a manufacturing method, applied in the field of stainless steel, can solve the problems of the influence of hot working properties of stainless steel, difficult to grasp the optimal composition, etc., and achieve the effects of excellent corrosion resistance, excellent mechanical properties, and simple and effective smelting process.

Inactive Publication Date: 2008-07-30
BAOSHAN IRON & STEEL CO LTD
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AI Technical Summary

Problems solved by technology

This method has an ideal effect, but it is not easy to grasp the best composition of Cu-Ag-Zn ternary master alloy, and Zn will also have a bad influence on the hot workability of stainless steel

Method used

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  • Austenitic antibiotic stainless steel and method for manufacturing same
  • Austenitic antibiotic stainless steel and method for manufacturing same

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Experimental program
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Effect test

Embodiment Construction

[0030] The chemical composition of the austenitic stainless steel used in the test is shown in Table 1. First, two elements, Ag and Cu, are smelted in a certain proportion to form an intermediate alloy, and then added as an ingredient to the raw material of antibacterial stainless steel. Then use vacuum induction furnace, electric furnace-AOD smelting or electric furnace-AOD-VOD to smelt stainless steel, cast billets, hot-roll to 4mm thick, solid solution + pickling at 1000-1200℃, cold-roll to 2mm thick, anneal at 1000-1200℃ Water cooled, polished.

[0031] The evaluation method of the antibacterial performance of the steel of the present invention is carried out according to the JIS Z2801-2000 "antibacterial processed products-antibacterial performance test method and antibacterial effect" standard, and the same grade of austenitic stainless steel without Ag is used as a control sample for comparative testing. The main test procedures are as follows:

[0032] 1) Test bacter...

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Abstract

The invention discloses an austenitic antimicrobial stainless steel and the manufacturing method thereof. The stainless steel contains an Ag-Cu binary master alloy with a weight percentage of 0.10 to 4.0 percent and the weight percentage (wt %) for the rest chemical components are as follows: C less than or equal to 0.08 percent, Si less than or equal to 1.0 percent, Mn less than or equal to 2.0 percent, P less than or equal to 0.04 percent, S less than or equal to 0.03 percent, Ni 7.0 to 15.0 percent, Cr 17.0 to 20.0 percent, Mo less than or equal to 4.0 percent, N less than or equal to 0.15 percent and the rest are Fe and unavoidable impurities. The method of manufacturing the antimicrobial stainless steel is as follows: the Ag element and the Cu element, of which Ag takes up 1.0 to 40 percent, are smelted to be a master alloy and then added to the antimicrobial stainless steel material to be smelted. The steel has the advantages of simple and effective smelting technique, excellent mechanical property, excellent corrosion resistance and excellent antibacterial property, can be made into shapes of various types applicable to kitchens, household appliances, medical apparatuses and so on.

Description

technical field [0001] The invention relates to a stainless steel, in particular to an 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 antibacterial performance, and can be widely used in ho...

Claims

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Application Information

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IPC IPC(8): C22C38/16C22C38/42C22C38/44C22C38/58C22C33/06
Inventor 林刚沈继程胡锦程
Owner BAOSHAN IRON & STEEL CO LTD
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