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Stainless steel, preparation method and application

A stainless steel, unavoidable technology, applied in the field of preparation, stainless steel, to achieve the effect of shortening time, improving pitting corrosion resistance, and improving microbial corrosion resistance

Active Publication Date: 2016-02-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the prior art is that there is no stainless steel material that can better meet the requirements of general corrosion resistance and significantly improve its resistance to microbial corrosion in a microbial environment.

Method used

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  • Stainless steel, preparation method and application
  • Stainless steel, preparation method and application
  • Stainless steel, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] The embodiment of the present invention also provides a kind of preparation method of stainless steel, figure 1 A schematic diagram of the implementation process for the preparation method of stainless steel, such as figure 1 As shown, the steps can be included:

[0041] Step 101: adding the components of the stainless steel into a smelting furnace for smelting, mixing the components in the stainless steel fully and uniformly after stirring, and casting into an ingot;

[0042] Step 102: Homogenize the ingot annealing;

[0043] Step 103: cooling to room temperature after forging;

[0044] Step 104: solution treatment until the elements in the steel are fully dissolved in the matrix;

[0045] Step 105: cooling to room temperature;

[0046] Step 106: cooling to room temperature after aging treatment, so that supersaturated copper is precipitated from the steel to form a sufficient amount of copper-rich phase.

[0047] During implementation, various components of stain...

Embodiment 1

[0067] Utilize vacuum induction smelting furnace to carry out the smelting of stainless steel of the present invention, concrete process is:

[0068] The alloy components are sequentially added to the vacuum induction smelting furnace, refined at 1480°C for 20 minutes, then magnetically stirred and cast into ingots;

[0069] After homogenization annealing at 1150°C for 2 hours, forging into rod or block samples;

[0070] Insulate at 1040°C for 0.5h, so that the copper, nitrogen and rare earth elements in the steel can be fully dissolved in the matrix;

[0071] After air cooling or water cooling to room temperature, the copper in the steel is in a supersaturated state;

[0072] Insulate at 700°C for 2 hours to allow the supersaturated copper to precipitate a sufficient amount of copper-rich phase from the steel;

[0073] Cool in air or water to room temperature.

[0074] The chemical composition analysis results of the stainless steel in Example 1 above are shown in Table 1....

Embodiment 2

[0077] The difference from Example 1 is:

[0078] Utilize vacuum induction smelting furnace to carry out the smelting of stainless steel of the present invention, concrete process is:

[0079] The alloy components are sequentially added to the vacuum induction smelting furnace, refined at 1450°C for 15 minutes, then magnetically stirred and cast into ingots;

[0080] After homogenization annealing at 1100°C for 1.5 hours, forging into rod or block samples;

[0081] Insulate at 1030°C for 0.5h, so that the copper, nitrogen and rare earth elements in the steel can be fully dissolved in the matrix;

[0082] After air cooling or water cooling to room temperature, the copper in the steel is in a supersaturated state;

[0083] Insulate at 700°C for 2 hours to allow the supersaturated copper to precipitate a sufficient amount of copper-rich phase from the steel;

[0084] Cool in air or water to room temperature.

[0085] The chemical composition analysis results of the stainless ...

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Abstract

The invention discloses stainless steel, a preparation method and application, and belongs to the technical field of stainless steel materials. The stainless steel comprises the following chemical components in percentage by weight: C not more than 0.03%, Si not more than 0.5%, 8.0-10.0% of Ni, 17.0-19.0% of Cr, S not more than 0.003%, P not more than 0.003%, 3.5-5.0% of Cu, 0.10-0.30% of N, rare earth elements not more than 0.10%, and the balance of Fe and inevitable impurities. The stainless steel has both broad-spectrum antibacterial function and excellent microbiological corrosion resistance. The stainless steel can be widely applied to stainless steel equipment and parts, needing to resist microbiological corrosion, in building decoration, kitchens, sanitary installations and facilities, household appliances, traffic transportation, industrial pipes, water treatment equipment and ocean engineering.

Description

technical field [0001] The invention relates to the technical field of stainless steel materials, in particular to a stainless steel, a preparation method and an application. Background technique [0002] Microbiologically Influenced Corrosion (MIC) involves a variety of industrial sectors, such as: nuclear energy, petroleum, industrial water in chemical industry, circulating cooling water systems, marine engineering and oil pipelines, etc. will be affected by microbial corrosion. Currently commonly used metal materials, such as stainless steel, copper and its alloys, nickel and its alloys, etc., will undergo certain microbial corrosion in seawater and industrial pipelines. Microbial corrosion has caused huge economic losses in industrial production, food processing and other application fields. According to statistics, the global loss directly caused by microbial corrosion is about 3 to 5 billion US dollars per year. According to the statistics of China National Petroleum...

Claims

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Application Information

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IPC IPC(8): C22C38/42
Inventor 南黎杨春光杨柯
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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