A kind of antibacterial cobalt nickel chromium molybdenum alloy and preparation method thereof

Abstract

The invention discloses an anti-microbial cobalt-nickel-chromium-molybdenum alloy and a preparation method of the anti-microbial cobalt-nickel-chromium-molybdenum alloy, wherein the alloy comprises the following components in percentage by weight: 33.0-37.0% of nickel, 19.0-21.0% of chromium, 9.0-10.5% of molybdenum, no more than 0.05% of carbon, no more than 0.10% of iron, no more than 0.10% of silicium, no more than 0.10% of aluminum, no more than 0.10% of copper, 0.03-0.08% of silver, 0.02-0.05% of cerium, and the balance of cobalt; the prepared anti-microbial cobalt-nickel-chromium-molybdenum alloy is of a single face-centred cubic structure after the solution treatment, the grain is small, and the silver is dispersed in the matrix. Compared with a common cobalt-nickel-chromium-molybdenum alloy, the processing performance and the corrosion resistance of the alloy in a non-microorganism environment are kept unchanged, but the performance of mold resistance against staphylococcus aureus and escherichia coli is excellent.

Description

technical field [0001] The antibacterial cobalt-nickel-chromium-molybdenum alloy of the invention belongs to the field of alloys, in particular to an antibacterial cobalt-nickel-chromium-molybdenum alloy for biomedical materials and jewelry and a preparation method thereof. Background technique [0002] The spread and spread of bacteria seriously threaten human health. In 1996, catastrophic Escherichia coli and MRSA (staphylococcus aureus) infections occurred in Japan. In 2003, a large-scale SARS virus infection broke out in China. In 2011, a deadly hemorrhagic Escherichia coli broke out in Germany. epidemic. In addition, the life activities of bacteria on the surface of metal materials can cause microbial corrosion of materials, make materials invalid or have harmful effects on human body. In view of the serious harm of bacterial transmission and the widespread microbial corrosion of metal materials, it is of great significance to modify metal biomaterials to have antibact...

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Problems solved by technology

Silver has excellent antibacterial properties and is often used as a preferred antibacterial element, but its solid solubility in iron-based and cobalt-based alloys is generally very small, and it is often considered difficult to alloy with it; copper is also It has excellent antibacterial properties, and it has a certain solubility in iron-based and cobalt-based alloys. However, copper alloyed metal biomaterials must be subjected to long-term aging treatment in the sensitization zone to obtain dispersed ε-Cu phases to obtain antibacterial properties. , this treatment method will have an adverse effect on the corrosion resistance and other properties of the material. After the copper content exceeds a certain level, it will easily deteriorate the thermal processing performance of the material.

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