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A technology of antibacterial stainless steel and phase austenite, which is applied in the field of nano-precipitated phase austenite antibacterial stainless steel, can solve the problems of antibacterial stainless steel corrosion resistance decline, etc., and achieve excellent mechanical properties, excellent physical and chemical properties, and simple ingredients.
Inactive Publication Date: 2008-06-11
XI AN JIAOTONG UNIV
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[0003] The purpose of the present invention is to overcome the above-mentioned defect that antibacterial stainless steel corrosion resistance declines, and provide a kind of nano-precipitated phase austenitic antibacterial stainless steel, in this stainless steel matrix, evenly dispersed with nano-scale precipitated phase ε-Cu, has good mechanical property and Anti-corrosion performance and long-lasting antibacterial performance
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[0011] The preparation of the nano-precipitated phase austenitic antibacterial stainless steel uses austenitic stainless steel as the substrate, adds an appropriate amount of Cu to the substrate, and uses a non-vacuum induction furnace for melting. Before casting, rare earth-magnesium-titanium (RE-Mg- Ti) The composite modifier is broken into small pieces with a particle size of less than 5mm. After drying at a temperature below 240°C, place it at the bottom of the ladle. The amount added is 0.5% to 1.0% of the weight of the molten steel. Composite modification treatment; this is beneficial to degassing and slag removal, purifying molten steel, refining the structure, improving the corrosion resistance and comprehensive mechanical properties of stainless steel. Then antibacterial heat treatment is carried out on the casting. The process is as follows: the first step is to keep the casting at a temperature of 1000°C to 1100°C for 1h to 3h, and air-cool or water-cool to room temp...
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Abstract
The invention discloses a nanometer precipitated phase austenite antibiotic stainless steel. Granular nanometer scale precipitated phases Epsilon-Cu are dispersed and distributed evenly in a prepared stainless steel matrix, to cause the stainless steel to have bacteria resistant performance. The weight percentage (percent) of the chemical compositions of the stainless steel is as follows: C is 0.10 to 0.06 percent, Ni is 8.00 to 10.00 percent, Cr is 17.00 to 20.00 percent, Cu is 1.50 to 3.50 percent, RE is 0.04 to 0.10 percent, Mg is 0.05 to 0.15 percent, Ti is 0.03 to 0.10 percent, Si is lower than or equal to 1.00 percent, Mn is lower than or equal to 2.00 percent, P is lower than or equal to 0.03 percent, S is lower than or equal to 0.03 percent, and the residual is Fe. The components of the invention are simple, alloying elements are few, and bacterium such as coliform bacteria, salmonella typhiurium, staphyloccocus aureus rosenbach and white candidiasis contacted with the stainless steel can be effectively killed. The bacteria resistant performance is durative, the bacteria resistant range is wide, and the invention can be widely applied to the fields of food processing, kitchen dining, daily electrical appliance, medical appliance, and equipment, etc.
Description
technical field [0001] The invention belongs to the intersection field of material processing engineering and medical microbiology, and relates to a nano-precipitated phase austenitic antibacterial stainless steel, which can endow ordinary austenitic stainless steel with excellent antibacterial performance by adding some specific chemical components and antibacterial heat treatment into the stainless steel , can be widely used in food processing, kitchen catering, household appliances, medical equipment and other fields that require long-lasting antibacterial properties. Background technique [0002] Microorganisms are closely related to human beings. Most microorganisms are beneficial to the human body, but very few pathogenic microorganisms such as bacteria and viruses are harmful to the human body. According to the 1996 statistics of the American "WHO" magazine, the death caused by bacterial infection in the world in 1995 was 17 million, accounting for about 1 / 3 of the de...
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