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High-hardness silver-bearing martensite antibacterial stainless steel

An antibacterial stainless steel and stainless steel technology, applied in the field of antibacterial stainless steel, can solve the problems of low hardness, low hardness and limited application of stainless steel, and achieve the effects of excellent antibacterial properties, improved hardness and wear resistance, great economic value and social value

Inactive Publication Date: 2012-12-26
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet this demand, various antibacterial stainless steels have emerged on the market, and their antibacterial properties are improved by adding silver, copper, Ti, rare earth and other alloying elements with bactericidal functions to them. They are mainly divided into ferritic antibacterial stainless steel, austenitic stainless steel Antibacterial stainless steel, antibacterial martensitic stainless steel, among which ferritic and austenitic antibacterial stainless steel are widely used, have successfully developed ferritic and austenitic antibacterial stainless steel, and have been used in sanitary ware, food containers and other industries, Martensitic antibacterial stainless steel has limited applications due to its low hardness. Although patents JP8104952 and CN101205592 have introduced martensitic stainless steel, due to the low hardness of stainless steel, industrialization has not been realized.

Method used

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  • High-hardness silver-bearing martensite antibacterial stainless steel
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In terms of weight percentage, the chemical composition is: 0.8%C, 17%Cr, 3.0%Mo, 0.1%V, 1.5%W, 0.7%Al, 0.15%Ag, 1.0%RE, 0.035%S, 0.03%P, The stainless steel with 2.0% other impurity elements and the balance of Fe is smelted in a vacuum induction furnace, and then electroslag remelted to prepare metal ingots. The ingot was forged at 950°C to form a steel plate with a thickness of 20 mm, and then subjected to spheroidizing annealing at 840°C for 8 hours. Each steel plate was heated at 900° C. and hot-rolled to form a steel plate with a thickness of 5 mm. The steel plate is heated and kept at 700°C for 60 minutes, pickled with 3% dilute nitric acid, and then cold-rolled to produce a steel plate with a thickness of 2mm.

[0033] The produced steel plate is heated and kept at 950°C for 60 minutes in a nitrogen atmosphere, then quenched in oil, and then tempered at 400°C for 2 hours to obtain the product.

Embodiment 2

[0035]In terms of weight percentage, the chemical composition is: 1.2%C, 18%Cr, 1.0%Mo, 0.6%V, 1.0%W, 1.2%Al, 0.1%Ag, 0.1%RE, 0.025%S, 0.02%P, The stainless steel with 1.0% other impurity elements and the balance of Fe is smelted in an intermediate frequency induction furnace, and then electroslag remelted to prepare metal ingots. The ingot was forged at 1000°C into a steel plate with a thickness of 100mm, and then spheroidized at 900°C for 24h. Each steel plate was heated at 900° C. and hot-rolled to form a steel plate with a thickness of 5 mm. The steel plate is heated and kept at 900°C for 40 minutes, pickled with 3% dilute nitric acid, and then cold-rolled to produce a steel plate with a thickness of 0.5mm.

[0036] The produced steel plate is heated and kept at 1200°C for 30 minutes in an argon atmosphere, then quenched in oil, and then tempered at 600°C for 0.5h to obtain the product.

Embodiment 3

[0038] In terms of weight percentage, the chemical composition is: 1.0%C, 16%Cr, 2.0%Mo, 1.0%V, 3.0%W, 0.9%Al, 0.2%Ag, 0.6%RE, 0.005%S, 0.01%P, Stainless steel with 0.5% other impurity elements and the balance of Fe is smelted in a vacuum induction furnace, and then electroslag remelted to prepare metal ingots. The ingot was forged at 1200°C to form a steel plate with a thickness of 40mm, and then spheroidized at 820°C for 18h. Each steel plate was heated at 1100° C. and hot-rolled to form a steel plate with a thickness of 5 mm. The steel plate is heated and kept at 1000°C for 30 minutes, pickled with 3% dilute nitric acid, and then cold-rolled to produce a steel plate with a thickness of 1mm.

[0039] The produced steel plate is heated and kept at 1000°C for 40 minutes in a nitrogen atmosphere, then quenched in oil, and then tempered at 465°C for 1.5 hours to obtain the product.

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Abstract

The invention relates to high-hardness silver-containing martensite antibacterial stainless steel. The stainless steel comprises the following chemical components in percentage by weight: 0.8-1.2% of C, 16-18% of Cr, 1.0-3.0% of Mo, 0.1-1.0% of V, 1.0-3.0% of W, 0.7-1.2% of Al, 0.1-0.2% of Ag, 0.1-1.0% of Re, not more than 0.035% of S, not more than 0.03% of P, not more than 2.0% of other impurities and the balance of Fe. The silver-containing martensite antibacterial stainless steel disclosed by the invention has the advantages of excellent antibacterial property larger than 99.0%, largely improved hardness and wear resistance and not less than HRC57 of hardness, and meets the requirements of cutter manufacturing of household, medical and the like industries on hardness and antibacterial property.

Description

technical field [0001] The invention relates to an antibacterial stainless steel, in particular to a high-hardness silver-containing martensitic antibacterial stainless steel and a process for producing stainless steel plates using the stainless steel. Background technique [0002] In recent years, with the occurrence of many bacterial infection incidents around the world, the health management issues of antibacterial and antibacterial have attracted great attention from the society. The food industry, medical and health industry and even ordinary families have higher and higher hygiene requirements for daily utensils. , the demand for antibacterial products is growing. In order to meet this demand, various antibacterial stainless steels have emerged on the market, and their antibacterial properties are improved by adding silver, copper, Ti, rare earth and other alloying elements with bactericidal functions to them. They are mainly divided into ferritic antibacterial stainle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/24C21D8/02C21D1/18C21D1/32
Inventor 赵忠魁王献忠张保议孙清洲张普庆
Owner SHANDONG JIANZHU UNIV
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