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High-strength high-corrosion-resistance anti-microbial stainless steel and preparation method thereof

A high-corrosion-resistant, high-strength technology, used in the fields of high-strength stainless steel and its preparation, stainless steel and its preparation, and new stainless steel materials, can solve the problem of reducing mechanical properties and corrosion resistance, affecting sharpness and wear resistance, and not having antibacterial properties And other problems, to achieve the effect of improving processing performance, improving pitting corrosion resistance and salt spray corrosion resistance, and good hardness

Inactive Publication Date: 2019-07-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the steels commonly used for kitchen knives in China are mainly 3Cr13 and 4Cr13. The hardness of these steels is low, which will affect the sharpness and wear resistance.
5Cr15, 7Cr17, etc. are mainly used for middle and high-end knives. Due to the increase of carbon content, the sharpness and wear resistance of this kind of knife steel increase, but the corrosion resistance decreases, and it does not have antibacterial properties.
This invention uses Mn and N instead of Ni to reduce costs, and while ensuring the ratio of the two phases, it does not reduce the mechanical properties and corrosion resistance, but too high Mn content may increase inclusions and adversely affect the properties of the steel
In this invention, mixed rare earth lanthanum and cerium are added, and Ba element is added at the same time. They will play a role in microalloying in steel, strengthen grain boundaries, purify grain boundaries, and improve corrosion resistance and hot workability. However, the invention The range of mixed rare earth content (0.005-0.1%) set in . High, may increase inclusion size and reduce pitting resistance

Method used

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  • High-strength high-corrosion-resistance anti-microbial stainless steel and preparation method thereof
  • High-strength high-corrosion-resistance anti-microbial stainless steel and preparation method thereof
  • High-strength high-corrosion-resistance anti-microbial stainless steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this embodiment, a high-strength, high-corrosion-resistant and antibacterial stainless steel for knives has a chemical composition as shown in Table 1.

[0042] In this example, see figure 1 , the preparation method of stainless steel for high-strength, high-corrosion-resistant and antibacterial cutting tools of the present embodiment comprises the following steps:

[0043] a. Weigh the raw materials according to the prepared target stainless steel component mass percentage with the composition of Table 1:

[0044] C: 0.59%, Si: 0.35%, S: 0.001%, P: 0.015%, Mn: 0.31%, Mo: 0.49%, Cr: 15.56%, V: 0.21%, Ag: 0.025%, Ce: 0.03, the rest partly iron and unavoidable impurities;

[0045] b. The raw materials taken in the step a are smelted in an electric furnace, refined outside the furnace of the LF process, VD vacuum degassing, electroslag remelting, forging, hot rolling, and cold rolling to obtain the required thickness. Stainless steel plate; after forging, hot rolling...

Embodiment 2

[0076] This embodiment is basically the same as Embodiment 1, especially in that:

[0077] In this embodiment, a high-strength antibacterial stainless steel for cutting tools, its chemical composition is shown in Table 7.

[0078] In this embodiment, the method for preparing stainless steel for high-strength and tough antibacterial knives in this embodiment includes the following steps:

[0079] a. Weigh the raw materials according to the prepared target stainless steel component mass percentage with the composition of Table 5:

[0080] C: 0.70%, Si: 0.40%, S: 0.001%, P: 0.015%, Mn: 0.6%, Mo: 1.0%, Cr: 16.5%, V: 0.5%, Ag: 0.1%, Ce: 0.05, the rest partly iron and unavoidable impurities;

[0081] b. The raw materials taken in the step a are smelted in an electric furnace, refined outside the furnace of the LF process, VD vacuum degassing, electroslag remelting, forging, hot rolling, and cold rolling to obtain the required thickness. Stainless steel plate; after forging, hot r...

Embodiment 3

[0083] This embodiment is basically the same as the previous embodiment, and the special features are:

[0084] In this embodiment, a high-strength antibacterial stainless steel for cutting tools, its chemical composition is shown in Table 7.

[0085] In this embodiment, the method for preparing stainless steel for high-strength and tough antibacterial knives in this embodiment includes the following steps:

[0086] a. Weigh the raw materials according to the prepared target stainless steel component mass percentage with the composition of Table 5:

[0087] C: 0.50%, Si: 0.30%, S: 0.020%, P: 0.020%, Mn: 0.6%, Mo: 0.1%, Cr: 14.5%, V: 0.1%, Ag: 0.1%, La: 0.05, the rest partly iron and unavoidable impurities;

[0088] b. The raw materials taken in the step a are smelted in an electric furnace, refined outside the furnace of the LF process, VD vacuum degassing, electroslag remelting, forging, hot rolling, and cold rolling to obtain the required thickness. Stainless steel plate;...

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Abstract

The invention discloses high-strength high-corrosion-resistance anti-microbial stainless steel and a preparation method of the high-strength high-corrosion-resistance anti-microbial stainless steel. The stainless steel has high performance, particularly high antibacterial property, high safety, ultra-high strength, high corrosion resistance, high wear resistance and good toughness. Compared with existing stainless steel for cutters, the high-strength high-corrosion-resistance anti-microbial stainless steel has the advantages of high hardness, high corrosion resistance, good antibacterial property and the like. Compared with steel for existing cutters, the content of carbon and chromium is adjusted in components, the silver element and the rare earth element are added, so that the materialhas high hardness and sharpness besides corrosion resistance and antibacterial property, the requirements of consumers can be met, and the grade of the cutters is improved. The steel has the high hardness of 56.0-60.0HRC, high pitting corrosion resistance and salt fog resistance. The steel is applicable to tools such as kitchen knives, scissors and the like, and can also be applied public facilities, household appliances and medical appliances.

Description

technical field [0001] The invention relates to a stainless steel and a preparation method thereof, in particular to a high-strength and tough stainless steel and a preparation method thereof, which are applied in the technical fields of new stainless steel material technology and corrosion-resistant and antibacterial metal functional materials. Background technique [0002] With the development of economy and society and the improvement of people's living standards, stainless steel is more and more widely used in people's daily life, especially in the field of stainless steel for knives. The sharpness of knives is the performance that people are most concerned about, but with people's yearning for a better life and the pursuit of quality of life, the requirements for kitchen knives are not only high sharpness, but also corrosion resistance, Antibacterial, sterilizing and other functions. In view of the current existing conditions, martensitic stainless steel knives may rus...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C21D1/18C21D1/26C21D8/02C21C5/52
CPCC21C5/005C21D1/18C21D1/26C21D8/0226C21D8/0236C22C38/002C22C38/005C22C38/007C22C38/02C22C38/04C22C38/22C22C38/24Y02P10/20
Inventor 刘峥杨玉丹王子萌刘振智董瀚赵洪山
Owner SHANGHAI UNIV
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