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Martensite antibacterial stainless steel and preparation method thereof

An antibacterial stainless steel and martensite technology, applied in the field of stainless steel, can solve the problems of reducing material processing performance and corrosion resistance, not showing antibacterial performance, and not mentioning the rapid sterilization and antibacterial performance of materials, so as to achieve rapid sterilization and sterilization. The effect of excellent antibacterial performance and strong bactericidal ability

Pending Publication Date: 2022-06-24
安徽工业大学科技园有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the patent of patent publication number CN1272889, a kind of antibacterial stainless steel containing silver was developed; in the patent of application number 200610134868.6, a kind of copper-containing martensitic antibacterial stainless steel and its heat treatment method were developed earlier. The distributed nano-scale precipitated phase ε-Cu keeps the material itself with good mechanical properties and has broad-spectrum and long-lasting antibacterial properties; patents with application numbers 200710199267.8, 201110083730.9 and 201110266884.1 also add Cu elements to martensite , Through special heat treatment, nanoscale ε-Cu precipitates are precipitated in the material matrix, so that they have antibacterial properties; however, when the content of Cu in martensitic steel is low, martensitic steel cannot show excellent antibacterial properties; When the Cu content is high, in addition to greatly increasing the production cost, and excessive Cu will also reduce the processing performance and corrosion resistance of the material.
All in all, Cu or Ag elements are mainly added to antibacterial stainless steel at this stage, but the relevant patents of antibacterial stainless steel containing Cu or Ag do not mention the rapid sterilization of materials and the guarantee of antibacterial properties of materials under high bacterial concentration

Method used

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  • Martensite antibacterial stainless steel and preparation method thereof
  • Martensite antibacterial stainless steel and preparation method thereof
  • Martensite antibacterial stainless steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, the components and weight percentages of martensitic antibacterial stainless steel are: C: 0.45, Si: 0.8, Mn: 0.7, S: 0.03, P: 0.03, Cr: 14.2, Mo: 0.8, V: 0.2, Cu: 2.2, Sc: 0.1, and the balance is Fe. After smelting, forging, hot forging and hot rolling into 5mm thick hot rolled sheet. Among them, the hot forging temperature is 1000°C, the holding time is 2h, and the final forging temperature is 860°C; the hot rolling temperature is 1000°C, the holding time is 2h, and the final rolling temperature is 860°C. After that, heat treatment is carried out, specifically, the temperature is kept at 1000°C for 0.5h, and the oil is cooled to room temperature to make the components of each element evenly distributed in the stainless steel to form a supersaturated solid solution, and then tempered at 550-700°C for 2-4h, air-cooled to At room temperature, the Sc-containing intermediate phase, the copper-rich phase and the carbide are dispersed and precipitated in...

Embodiment 2

[0045] In this embodiment, the components and weight percentages of the martensitic antibacterial stainless steel are: C: 0.48, Si: 0.75, Mn: 0.75, S: 0.02, P: 0.03, Cr: 14.8, Mo: 0.7, V: 0.18, Cu: 2.4, Sc: 0.5, and the balance is Fe. After smelting, forging, hot forging and hot rolling into 5mm thick hot rolled sheet. After that, it was kept at 900 °C for 1 h, and the oil was cooled to room temperature, so that elements such as Sc and Cu were evenly distributed in the stainless steel to form a supersaturated solid solution. Phase, copper-rich phase and carbides are dispersed and precipitated in the matrix to prepare stainless steel.

[0046] The technical effect of the present embodiment 2 is illustrated by the following test comparison, and the samples under different tempering treatments in the embodiment are respectively recorded as samples 7, 8, 9, and 10 (for the specific tempering treatment temperature and time, see Table 4 below).

[0047] When the stainless steel co...

Embodiment 3

[0066] In this embodiment, the components and weight percentages of martensitic antibacterial stainless steel are: C: 0.42, Si: 0.72, Mn: 0.75, S: 0.02, P: 0.03, Cr: 15.1, Mo: 0.85, V: 0.22, Cu: 3.1, Sc: 1.0, and the balance is Fe. After smelting, forging, hot forging and hot rolling into 5mm thick hot rolled sheet. After that, it was kept at 980°C for 0.5h, and the oil was cooled to room temperature, so that elements such as Sc and Cu were evenly distributed in the stainless steel to form a supersaturated solid solution, and then tempered at 550-700°C for 2-4h, and air-cooled to room temperature to make the Sc-containing The intermediate phase, copper-rich phase and carbide are dispersed and precipitated in the matrix to prepare stainless steel.

[0067] 3.1 Antibacterial experiment

[0068] In this experiment, ordinary 5Cr15MoV martensitic stainless steel was used as the control material. The specific experiment is the same as that of Example 1. In Example 3, the samples...

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Abstract

The invention discloses martensite antibacterial stainless steel and a preparation method thereof. The stainless steel comprises the following chemical components in percentage by weight (wt.%): 0.40-0.65% of C; si: less than or equal to 1.0; mn: < = 1.0; s: less than or equal to 0.03; p: less than or equal to 0.03; cr: 14.0 to 16.0%; 0.5 to 1.0 part of Mo; 0.1 to 0.3 part of V; 1.5 to 3.5 parts of Cu; 0.1 to 2.0 parts of Sc; and the balance of Fe. According to the martensite antibacterial stainless steel and the preparation method thereof, the Sc element is added into the martensite stainless steel, the martensite antibacterial stainless steel with rapid sterilization and strong sterilization capacity is obtained, and by regulating and controlling the content of the Sc element in the steel and corresponding heat treatment, the hardness of the material is improved, and meanwhile the material is endowed with the rapid sterilization property and the excellent antibacterial property under the high bacterial concentration.

Description

technical field [0001] The invention belongs to the field of stainless steel, and in particular relates to a martensitic stainless steel with antibacterial function and a preparation method thereof. Background technique [0002] With the development of society and the improvement of people's economic and living standards, people pay more and more attention to the surrounding environment and their own health, and antibacterial materials have attracted more and more researchers' attention. It is against this background that antibacterial stainless steel was developed. Antibacterial stainless steel refers to adding metal elements with antibacterial effect, such as copper (Cu), silver (Ag) and rare earth metals (such as Re), to the substrate or surface of the existing stainless steel, and through special heat treatment operations, the material can be obtained. A new type of steel material with excellent antibacterial properties and good mechanical and corrosion resistance. [...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C22C38/20C21D8/02
CPCC22C38/02C22C38/04C22C38/22C22C38/24C22C38/20C22C38/005C21D8/0226C21D8/0236C21D2211/008
Inventor 敬和民郝文俊黄郦张琦钟嘉良钟敏杨柯
Owner 安徽工业大学科技园有限公司
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