Antibacterial austenitic stainless steel

A technology of austenitic stainless steel and antibacterial stainless steel, which is applied in the field of stainless steel smelting technology, and can solve problems such as hot-rolled surface cracks and yield rate to be improved

Inactive Publication Date: 2021-02-05
BAOSTEEL DESHENG STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, it is found that the composition design can make the antibacterial performance of the finished product reach more than 99%, but it is still prone to hot-rolled surface crack defects, and its yield rate needs to be improved

Method used

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  • Antibacterial austenitic stainless steel
  • Antibacterial austenitic stainless steel

Examples

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Embodiment 1

[0023] An austenitic antibacterial stainless steel, the chemical composition weight percent (wt%) range is as follows: C: 0.047, Si: 0.29, Mn: 1.0, P0.022, S: 0.001, Ni: 8.1, Cr: 18.3, N: 0.041, Ag: 0.06, O: 0.004, and (Ag–10×O)=0.02, the rest is composed of Fe and unavoidable impurities;

[0024] The manufacture method of described austenitic antibacterial stainless steel comprises the following steps:

[0025] 1) Silver and nickel are smelted in proportion to make Ag-Ni binary alloy;

[0026] 2) Mix Ag-Ni binary alloy and other chemical components of the aforementioned austenitic antibacterial stainless steel for smelting and continuous casting into billets;

[0027] 3) Hot rolling: Among them, the initial temperature of hot rolling is 1190°C, and the hot-rolled plate is annealed and pickled after holding at 1030°C for 30s;

[0028] 4) Cold rolling and annealing and pickling after cold rolling at 1040°C for 30s.

Embodiment 2-5

[0030] Embodiment 2-5, comparative example 1-4 are the same as the process of embodiment 1, the difference is that the chemical composition weight percentage and manufacturing process parameters are different, wherein the chemical composition weight percentage of each embodiment is as shown in Table 1, and Table 1 provides at the same time The standard composition of conventional 304 austenitic stainless steel was used as Comparative Example 5.

[0031]

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Abstract

The invention discloses an antibacterial austenitic stainless steel. The antibacterial austenitic stainless steel comprises the following chemical components of, in percentage by weight (wt%), 0.02%-0.06% of C, less than or equal to 0.5% of Si, 1.0%-2.0% of Mn, less than or equal to 0.04% of P, less than or equal to 0.005% of S, 8.0%-9.0% of Ni, 18.0%-19.0% of Cr, 0.02%-0.06% of N, 0.05%-0.12% ofAg, less than or equal to 0.01% of O, 0.02% </= (Ag-10 * O) </= 0.05% of O and the balance Fe and inevitable impurities; and meanwhile, the process amount is adjusted, so that the antibacterial austenitic stainless steel which is excellent in mechanical property and corrosion resistance, has the antibacterial property as high as 99.99% and has no surface crack defect is obtained.

Description

technical field [0001] The invention relates to a stainless steel smelting process, in particular to an antibacterial austenitic stainless steel. Background technique [0002] Many domestic enterprises and research institutes are committed to the development of antibacterial stainless steel: Institute of Metal Research, Chinese Academy of Sciences, Baosteel, Taiyuan Iron and Steel, Jiuquan Steel and other units are developing antibacterial stainless steel such as copper-containing ferrite and austenite; according to reports, Zhejiang Tianbao Industrial Co., Ltd. Copper-containing austenitic antibacterial stainless steel products have been produced; Changzhou Daping Stainless Steel Products Co., Ltd. has launched antibacterial stainless steel with silver-plated surfaces, and has produced some tableware and kitchen utensils. However, the production of copper-containing antibacterial stainless steel requires a special heat treatment process. Higher content of copper will cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/40C22C38/58C22C33/06C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0247C22C33/06C22C38/001C22C38/007C22C38/02C22C38/04C22C38/40C22C38/58
Inventor 林刚李实黄德川庄清云
Owner BAOSTEEL DESHENG STAINLESS STEEL
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