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Martensite stainless steel with high hardness, strong antibacterial property and excellent corrosion resistance, and heat treatment method thereof

A martensitic stainless steel, antibacterial technology, applied in the field of stainless steel materials, can solve the problems of limited application, decline, and corrosion resistance decline, and achieve the effects of excellent antibacterial properties, excellent corrosion resistance, and strong antibacterial properties

Active Publication Date: 2015-01-14
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

[0003] Although the patents CN101205592 and CN10134868.8 introduce martensitic antibacterial stainless steel, in order to ensure the antibacterial properties of this type of material, the high temperature aging often leads to tissue softening, so the hardness will drop significantly to the hardness level of austenitic steel , so this greatly limits its potential application
Although the patent CN102242320A introduces that the steel has high hardness and antibacterial properties at the same time, the high cost factor caused by the addition of many alloys to the steel and the decline in corrosion resistance caused by the excessive carbon content will also be very large. limit its application in the potential field

Method used

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  • Martensite stainless steel with high hardness, strong antibacterial property and excellent corrosion resistance, and heat treatment method thereof
  • Martensite stainless steel with high hardness, strong antibacterial property and excellent corrosion resistance, and heat treatment method thereof
  • Martensite stainless steel with high hardness, strong antibacterial property and excellent corrosion resistance, and heat treatment method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this embodiment, the chemical composition of the martensitic antibacterial stainless steel is (% by weight):

[0031] C: 0.34%, Cr: 13.76%, Mo: 0.79%, Cu: 3.42%, N: 0.06%, the rest is Fe; impurity element content: Si≤1.00%, Mn≤1.00%, P≤0.040%, S≤ 0.030%.

[0032] The heat treatment process of the above-mentioned martensitic antibacterial stainless steel is:

[0033] Insulate at 1080°C for 0.5 hours, cool the oil to room temperature, keep it in liquid nitrogen (-196°C) for 0.5 hours, then raise the temperature to 700°C and keep it for 2 hours to precipitate the copper-rich phase, air cool to room temperature; then keep at 1000°C for 10 Minutes of water quenching; finally at 500 ° C for 1 hour.

[0034] Antibacterial results such as figure 1 As shown in (b), it can be seen that compared with the control sample 3Cr13Mo stainless steel, the martensitic antibacterial stainless steel has excellent bactericidal ability, and the hardness test and pitting corrosion resista...

Embodiment 2

[0036] In this embodiment, the chemical composition of the martensitic antibacterial stainless steel is (% by weight):

[0037] C: 0.30%, Cr: 13.14%, Mo: 0.67%, Cu: 3.14%, N: 0.07%, the rest is Fe; impurity element content: Si≤1.00%, Mn≤1.00%, P≤0.040%, S≤ 0.030%.

[0038] The heat treatment process of the above-mentioned martensitic antibacterial stainless steel is:

[0039] Insulate at 1060°C for 0.5 hours, cool the oil to room temperature, then keep it in liquid nitrogen (-196°C) for 0.5 hours, then raise the temperature to 650°C and keep it for 4 hours to precipitate the copper-rich phase, then air-cool or water-cool to room temperature; then at 980 Incubate at ℃ for 5 minutes and water quench; finally incubate at 480℃ for 1 hour.

Embodiment 3

[0041] In this embodiment, the chemical composition of the martensitic antibacterial stainless steel is (% by weight):

[0042] C: 0.29%, Cr: 12.78%, Mo: 0.62%, Cu: 2.8%, N: 0.04%, the rest is Fe; impurity element content: Si≤1.00%, Mn≤1.00%, P≤0.040%, S≤ 0.030%.

[0043] The heat treatment process of the above-mentioned martensitic antibacterial stainless steel is:

[0044]Insulate at 1040°C for 0.5 hours. After the oil is cooled to room temperature, keep it in liquid nitrogen (-196°C) for 0.5 hours, then raise the temperature to 720°C and keep it for 4 hours to precipitate the copper-rich phase, then air cool to room temperature; then keep at 930°C for 3 hours Minutes of water quenching, and finally at 530 ° C for 2 hours. The polarization curve of the present embodiment martensitic antibacterial stainless steel is as figure 2 shown.

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Abstract

The invention discloses a martensite stainless steel with high hardness, strong antibacterial property and excellent corrosion resistance, and a heat treatment method thereof, and belongs to the technical field of stainless steel materials. The chemical components of the stainless steel comprise 0.28-0.35wt% of C, 1.00wt% or less of Si, 1.00wt% or less of Mn, 0.040wt% or less of P, 0.030wt% or less of S, 12.00-14.00wt% of Cr,2.5-3.5wt% of Cu, 0.5-1.0wt% of Mo, 0.02-0.08wt% of N, and the balance of Fe. A copper-rich phase uniformly and dispersively precipitates in a stainless steel matrix after the special heat treatment of the stainless steel in order to make the stainless steel have an antibacterial property and maintain the high hardness of the martensitic stainless steel. The stainless steel has a wide spectrum antibacterial property and good mechanical properties, and can be widely used in the fields of medical devices, sanitary devices, kitchen knives and cutting tools and the like.

Description

technical field [0001] The invention relates to the field of stainless steel materials, in particular to a martensitic stainless steel with high hardness, strong antibacterial properties and excellent corrosion resistance and a heat treatment method thereof. In addition to its unique antibacterial function, the stainless steel maintains high hardness and can be widely used in medical equipment, sanitary utensils, kitchen knives and other fields. Background technique [0002] The research and development of copper-containing antibacterial stainless steel makes the human immune system expand to every corner of human living space, which has very important practical significance and economic value for improving people's quality of life and social development. Due to the possible high hardness and strong antibacterial properties, the development and application of martensitic antibacterial stainless steel has an attractive potential market. For example, if the scalpel for surgica...

Claims

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Application Information

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IPC IPC(8): C22C38/22C21D6/00
CPCC21D6/002C22C38/001C22C38/12C22C38/20C22C38/22
Inventor 杨春光王帅杨柯
Owner 华南生物医用材料(深圳)有限公司
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