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Preparation method of martensitic stainless steel having broad-spectrum antimicrobial effects

A technology of martensitic stainless steel and antibacterial effect, which is applied in the field of iron and steel metallurgy, can solve the problems of rapidity, durability, broad-spectrum antibacterial performance, disappearance, and decline in antibacterial rate of unexplained antibacterial performance, so as to inhibit and kill bacteria, The effect of long-lasting effect, excellent mechanical properties and corrosion resistance

Inactive Publication Date: 2013-07-24
HAIMEN HAIZHEN VACUUM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, martensitic stainless steel products must be quenched and tempered before use to obtain higher hardness to meet the requirements of use, but in this patent, the copper-rich phase in the martensitic stainless steel plate that has only been annealed will occur in the subsequent quenching Re-solid solution, and thus cause the antibacterial rate to decrease or even disappear
Moreover, the patent does not indicate the rapidity, persistence and broad-spectrum antibacterial properties of its antibacterial properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing martensitic stainless steel with broad-spectrum antibacterial effect, the stainless steel is composed of the following components in percentage (weight): C: 0.1%, Si: 0.8%, Mn: 1.6%, P≤0.04%, S≤0.03%, Cr: 15%, Ni: 0.5%, Cu: 2.4%, Ag: 0.2%, Ti: 1.5%, V: 0.4%, Zr: 0.4%, Mo: 3.4%, and the balance is Fe and Unavoidable impurities, the preparation method includes:

[0019] ①Preparation of master alloy: before smelting, the two elements of Ag and Cu are smelted according to the above-mentioned addition ratio to make master alloy, and then the master alloy is added as an ingredient;

[0020] ② Smelting: using electric furnace-AOD-VOD smelting and pouring;

[0021] ③Rolling: hot rolling first, then annealed at 860°C, then cold rolled, then annealed at 1050°C, pickled and polished.

[0022] ④Antibacterial treatment: first heat preservation at 1160°C for 2 hours, then air-cool to room temperature; then aging treatment: heat preservation at 530°C for 10 ho...

Embodiment 2

[0024] A method for preparing martensitic stainless steel with broad-spectrum antibacterial effect, the stainless steel is composed of the following components in percentage (weight): C: 0.3%, Si: 0.6%, Mn: 1.8%, P≤0.04%, S≤0.03%, Cr: 13%, Ni: 0.7%, Cu: 2.2%, Ag: 0.4%, Ti: 1.3%, V: 0.6%, Zr: 0.2%, Mo: 3.6%, and the balance is Fe and Unavoidable impurities, the preparation method includes:

[0025] ①Preparation of master alloy: before smelting, the two elements of Ag and Cu are smelted according to the above-mentioned addition ratio to make master alloy, and then the master alloy is added as an ingredient;

[0026] ② Smelting: using electric furnace-AOD-VOD smelting and pouring;

[0027] ③Rolling: hot rolling first, then annealed at 880°C, then cold rolled, then annealed at 1030°C, pickled and polished.

[0028] ④ Antibacterial treatment: first heat preservation at 1180°C for 1 hour, then air-cool to room temperature; then aging treatment: heat preservation at 550°C for 8 hou...

Embodiment 3

[0030] A method for preparing martensitic stainless steel with broad-spectrum antibacterial effect, the stainless steel is composed of the following components in percentage (weight): C: 0.2%, Si: 0.7%, Mn: 1.7%, P≤0.04%, S≤0.03%, Cr: 14%, Ni: 0.6%, Cu: 2.3%, Ag: 0.3%, Ti: 1.4%, V: 0.5%, Zr: 0.3, Mo: 3.5%, the balance is Fe and not To avoid impurities, the preparation method comprises:

[0031] ①Preparation of master alloy: before smelting, the two elements of Ag and Cu are smelted according to the above-mentioned addition ratio to make master alloy, and then the master alloy is added as an ingredient;

[0032] ② Smelting: using electric furnace-AOD-VOD smelting and pouring;

[0033] ③Rolling: hot rolling first, then annealed at 870°C, then cold rolled, then annealed at 1040°C, pickled and polished.

[0034] ④ Antibacterial treatment: first heat preservation at 1170°C for 1.5 hours, then air-cool to room temperature; then aging treatment: heat preservation at 540°C for 9 hou...

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Abstract

The invention discloses a preparation method of martensitic stainless steel having broad-spectrum antimicrobial effects. The preparation method provided by the invention is characterized by comprising the following steps of 1, before smelting, melting Ag and Cu into an intermediate alloy according to ratios and adding the intermediate alloy as an auxiliary material into raw metals, 2, carrying out smelting by an electric furnace-AOD-VOD and carrying out pouring, 3, carrying out hot rolling, carrying out annealing at a temperature of 860 to 880 DEG C, carrying out cold rolling, carrying out annealing at a temperature of 1030 to 1050 DEG C, and carrying out acid-washing and polishing, and 4, carrying out antibacterial treatment through carrying out heat preservation at a temperature of 1160to 1180 DEG C for 1 to 2 hours and cooling in air to a room temperature, and carrying out aging treatment through carrying out heat preservation at a temperature of 530 to 550 DEG C for 8 to 10 hoursfor aging treatment and cooling in air.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a preparation method of martensitic stainless steel. Background technique [0002] Stainless steel has a history of more than 90 years since it came out in the last century. The invention of stainless steel is a major achievement in the history of metallurgy in the world. The production of stainless steel has laid an important material and technological foundation for industrial and technological progress. In the course of its development, it has gradually formed four categories: ferritic stainless steel, martensitic stainless steel, austenitic stainless steel, and austenitic-ferritic duplex stainless steel. [0003] It is well known that silver and copper can inhibit the growth of bacteria, and they were used as drinking water containers and medical appliances as early as 1000 AD. The incomparable superiority of stainless steel itself has led to the rise of research on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C21D1/00
Inventor 朱育盼
Owner HAIMEN HAIZHEN VACUUM EQUIP
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