Martensite aging anti-microbial stainless steel and preparation method thereof

An antibacterial stainless steel and martensite technology, applied in the field of materials, can solve the problems of poor material quality, no antibacterial performance, and unstable raw material quality, and achieve excellent strength and toughness matching, hardness and strength improvement, and excellent corrosion resistance. Effect

Inactive Publication Date: 2020-02-28
南京金科特钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Stainless steel materials for knives are currently commonly used low-carbon and low-chromium martensitic stainless steels. Compared with well-known brands of knives and scissors in Europe and the United States, these materials are of poorer quality and do not have antibacterial properties. The raw materials used for high-end knives and scissors products have higher requirements. The qua

Method used

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  • Martensite aging anti-microbial stainless steel and preparation method thereof
  • Martensite aging anti-microbial stainless steel and preparation method thereof
  • Martensite aging anti-microbial stainless steel and preparation method thereof

Examples

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Example Embodiment

[0047] Example 1

[0048] In this embodiment, the chemical composition of the maraging antibacterial stainless steel is: C: 0.39wt.%, Cr: 13.94wt.%, Cu: 2.52%, Mo: 0.54wt.%, V: 0.12wt.%, Mn : 0.49wt.%, Si: 0.45wt.%, O: 20ppm, N: 250ppm, S: 30ppm, P: 80ppm, the balance is iron.

[0049] In this embodiment, the heat treatment process after cold rolling: firstly heat at 1050°C for 30 minutes and then quench, then heat at 160°C for 150 minutes and then air-cool to room temperature, and finally age at 500°C for 30 minutes and air-cool to room temperature.

Example Embodiment

[0050] Example 2

[0051] In this embodiment, the chemical composition of the maraging antibacterial stainless steel is: C: 0.49wt.%, Cr: 16.42wt.%, Cu: 3.34%, Mo: 0.86wt.%, V: 0.17wt.%, Mn : 0.82wt.%, Si: 0.76wt.%, O: 35ppm, N: 330ppm, S: 40ppm, P: 67ppm, the balance is iron.

[0052] In this embodiment, the heat treatment process after cold rolling: firstly heat at 1060°C for 40 minutes and then quench, then heat at 170°C for 120 minutes and then air-cool to room temperature, and finally age at 510°C for 40 minutes and air-cool to room temperature.

Example Embodiment

[0053] Example 3

[0054] In this embodiment, the chemical composition of the maraging antibacterial stainless steel is: C: 0.43wt.%, Cr: 15.07wt.%, Cu: 2.81%, Mo: 0.57wt.%, V: 0.15wt.%, Mn : 0.52wt.%, Si: 0.48wt.%, O: 28ppm, N: 245ppm, S: 50ppm, P: 52ppm, the balance is iron.

[0055] In this embodiment, the heat treatment process after cold rolling: first heat at 1030°C for 50 minutes and then quench, then heat at 180°C for 180 minutes and then air-cool to room temperature, and finally age at 520°C for 50 minutes and air-cool to room temperature.

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Abstract

The invention relates to martensite aging anti-microbial stainless steel and a preparation method thereof, and belongs to the technical field of materials. Chemical components of the martensite aginganti-microbial stainless steel comprise, by weight percent, 0.35%-0.50% of C, 13.5%-16.5% of Cr, 1.5%-4.5% of Cu, 0.5%-1.0% of Mo, 0.1%-0.2% of V, not larger than 1.0% of Mn, not larger than 1.0% of Si, smaller than 0.01% of P, smaller than 0.01% of S, smaller than 0.005% of O, not larger than 0.05% of N and the balance Fe. The preparation method of the martensite aging anti-microbial stainless steel comprises the steps of batching, smelting, casting forming, forging and heat processing and cold processing and heat treatment. The Cu element of a certain content is added, after the heat treatment process is optimized, the martensite-austenite ratio is adjusted and controlled, optimal matching of material strength and toughness is obtained, and good corrosion resistance and broad-spectrum mold resistance are shown.

Description

technical field [0001] The invention relates to a maraging antibacterial stainless steel and a preparation method thereof, belonging to the technical field of materials. Background technique [0002] At present, my country's low-grade cutting tool materials usually choose martensitic stainless steel or duplex stainless steel with price advantages, and these materials are easy to corrode and have poor performance (such as cutting performance, sharpness and durability), so they are easily damaged during use. The lifespan is short; while the high-carbon high-chromium martensitic stainless steel material used in high-end knives has high strength and hardness, but the toughness is insufficient, which is easy to cause the edge of the knife to chip, and the price is expensive, which cannot be accepted by many families. At the same time, with the improvement of national living standards, people have put forward new requirements for household knives: such as the antibacterial and anti...

Claims

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Application Information

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IPC IPC(8): C22C38/24C22C38/22C22C38/20C22C38/04C22C38/02C22C33/04C21D8/02C21D1/18
CPCC21D1/18C21D8/0205C21D8/0221C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/20C22C38/22C22C38/24
Inventor 单以银石全强严伟李艳芬王威杨柯
Owner 南京金科特钢有限公司
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