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Martensitic antibiotic stainless steel and thermal treatment method thereof

An antibacterial stainless steel and martensitic technology, applied in the field of martensitic stainless steel, can solve the problems of rapid antibacterial performance, durability, broad-spectrum antibacterial performance, disappearance, and decline in antibacterial rate, and achieve rapid antibacterial durability, The effect of reducing the action time and not reducing the antibacterial performance

Active Publication Date: 2008-06-25
华南生物医用材料(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, martensitic stainless steel products must be quenched and tempered before use to obtain higher hardness to meet the requirements of use, but in this patent, the copper-rich phase in the martensitic stainless steel plate that has only been annealed will occur in the subsequent quenching Re-solid solution, and thus cause the antibacterial rate to decrease or even disappear
Moreover, the patent does not indicate the rapidity, persistence and broad-spectrum antibacterial properties of its antibacterial properties

Method used

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  • Martensitic antibiotic stainless steel and thermal treatment method thereof
  • Martensitic antibiotic stainless steel and thermal treatment method thereof
  • Martensitic antibiotic stainless steel and thermal treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The chemical composition is Cu: 1.34% by weight, C: 0.12% by weight, Si: 1.40% by weight, Mn: 0.44% by weight, Cr: 12.4% by weight, Ni: 0.15% by weight, Nb: 0.85% by weight, Mo: 2.45% by weight %, Ti: 0.65% by weight, and the balance is iron. After smelting and forging, the stainless steel is hot-rolled and then annealed, and then cold-rolled and annealed. Then keep it in solid solution at 1050°C for 0.5-1 hour, oil-cool or air-cool to room temperature, so that the copper can be evenly distributed in the stainless steel. Then aging at 500-800°C for 6 hours, air-cooling to room temperature, the ε-Cu phase can be uniformly dispersed and precipitated in the matrix.

[0028] The ε~Cu phase dispersed and precipitated during the aging process is the key to the bactericidal effect of martensitic antibacterial stainless steel, but at this time the matrix structure is tempered structure, and the strength and hardness are far from the performance requirements of martensitic stain...

Embodiment 2

[0062] The chemical composition is Cu: 2.05% by weight, C: 0.19% by weight, Si: 0.51% by weight, Mn: 1.38% by weight, Cr: 13.0% by weight, Ni: 0.16% by weight, Nb: 0.98% by weight, V: 0.94% by weight %, Zr: 0.46% by weight, and the balance is iron. After smelting and forging, the stainless steel is hot-rolled and then annealed, and then cold-rolled and annealed. Then heat it at 1050°C for 0.5 to 1 hour for solid solution, and cool it in oil or air to room temperature. Aging at 500-800°C for 6 hours, air cooling to room temperature. The martensitic stainless steel plate that has undergone solid solution and aging is kept at 950-1100°C for 3-30 minutes, then oil-cooled, and then kept at 550-650°C for 2 hours.

[0063] 1. Antibacterial experiment

[0064] In this experiment, ordinary 3Cr13 stainless steel was used as the control steel. Concrete experiment is with embodiment 1.

[0065] Table 4 Broad-spectrum antibacterial performance of martensitic antibacterial stainless ste...

Embodiment 3

[0078] The chemical composition is Cu: 3.13% by weight, C: 0.29% by weight, Si: 0.68% by weight, Mn: 0.28% by weight, Cr: 13.2% by weight, Ni: 0.14% by weight, Nb: 0.83% by weight, and the balance is iron After the stainless steel is smelted and forged, it is hot rolled and then annealed, and then cold rolled and annealed. Then heat it at 1050°C for 0.5 to 1 hour for solid solution, and cool it in oil or air to room temperature. Then aged at 500-800°C for 6 hours, and air-cooled to room temperature. The martensitic stainless steel plate that has undergone solid solution and aging is kept at 950-1100°C for 3-30 minutes, then oil-cooled, and then kept at 200-300°C for 2 hours.

[0079] 1. Antibacterial experiment:

[0080] In this experiment, ordinary 3Cr13 stainless steel was used as the control steel. Concrete experiment is with embodiment 1.

[0081] Table 7 Broad-spectrum antibacterial performance of martensitic antibacterial stainless steel

[0082]

[0083] 2. Anti...

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Abstract

The invention discloses martensite antibacterial stainless steel, the weight percentage compositions of which are: 0.05 to 1.0 percent by weight of C, less than or equal to 3 percent by weight of Si, less than or equal to 1.5 percent by weight of Mn, 10 to 30 percent by weight of Cr, less than or equal to 1 percent by weight of Ni, 0.5 to 5 percent by weight of Cu, less than or equal to 1 percent by weight of Nb, less than or equal to 1 percent by weight of Ti, uniformly dispersed nano-precipitation phases epsilon-cu, and the balance Fe and unavoidable impurities. The invention also discloses a hot treatment method of the martensite antibacterial stainless steel, which comprising the following steps of: firstly, performing hot rolling and cold rolling, followed by antibacterial treatment on the martensite antibacterial stainless steel to making an antibacterial part of the martensite antibacterial stainless steel; and then performing quenching and tempering sequentially. The invention has a broad spectrum antibacterial property, rapid sterilization property and a long-lasting antibacterial property, maintains good mechanical performance of the materials and has significant economic and social value.

Description

technical field [0001] The invention relates to martensitic stainless steel, and in particular provides a martensitic antibacterial stainless steel with good antibacterial and mechanical properties, which can be widely used in the fields of sanitation, food, kitchen knives and medical instruments, and a heat treatment method thereof. Background technique [0002] On the earth, germs are almost everywhere, seriously threatening human health. In 1996, a nationwide incident of pathogenic Escherichia coli O157 infection occurred in Japan, which once caused panic around the world. The outbreak of the SARS virus in my country in 2003 seriously affected my country's economic construction and people's daily life. Therefore, the development of antibacterial materials that can be produced and which are closely related to human life has become a hot topic today, and people are paying more and more attention to it. [0003] It is well known that silver and copper can inhibit the growt...

Claims

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Application Information

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IPC IPC(8): C22C38/42C22C38/48C22C38/50C22C38/44C21D8/00C21D11/00
CPCY02P10/20
Inventor 刘永前南黎陈德敏杨柯
Owner 华南生物医用材料(深圳)有限公司
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