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Powder metallurgy composite antimicrobial stainless steel instrument and its preparation method

A composite antibacterial and powder metallurgy technology, applied in the field of stainless steel appliances, achieves the effect of simple adjustment process, reduction of material cost and consumption saving

Inactive Publication Date: 2007-08-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are reports on the preparation of copper-containing antibacterial stainless steel by powder injection molding, there is no relevant report on the preparation of composite antibacterial materials composed of stainless steel substrate and surface antibacterial layer by powder metallurgy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) 3Cr13 martensitic stainless steel powder is molded into a green knife handle;

[0035] (2) In terms of parts by weight, add 0.01 part of silver powder to 99.99 parts of 3Cr13 martensitic stainless steel powder and mix them thoroughly to form a mixed powder;

[0036] (3) Secondary molding is carried out by powder injection molding, and the outer surface of the green knife handle made in (1) is uniformly covered with the mixed powder made in (2), and then sintered at 1100°C to form a surface Composite stainless steel handle composed of antibacterial layer and ordinary stainless steel matrix;

[0037] (4) Perform 1000°C quenching + 200°C tempering treatment on the composite stainless steel handle made in (3).

[0038] The powder metallurgy composite martensite antibacterial stainless steel handle is prepared. Using the "adhesive film method" proposed by the Japan Food Analysis Center, the antibacterial effect reached more than 90% through observation of the culture of Esch...

Embodiment 2

[0040] (1) 1Cr18Ni9Ti austenitic stainless steel powder is made into a hemostatic forceps green body by powder injection molding method;

[0041] (2) In terms of parts by weight, add 3 parts of copper powder to 97 parts of 1Cr18Ni9Ti austenitic stainless steel powder and mix them thoroughly to form a mixed powder;

[0042] (3) The powder injection molding method is used for secondary molding, and the outer surface of the hemostatic forceps green body made in (1) is evenly coated

[0043] (2) The prepared mixed powder is then sintered at 1300°C to produce a composite stainless steel hemostatic forceps composed of a surface antibacterial layer and an ordinary stainless steel matrix;

[0044] (4) The composite stainless steel hemostatic forceps made in (3) were heated at 1150°C and then water-cooled.

[0045] Prepared powder metallurgy composite austenitic antibacterial stainless steel hemostatic forceps. Using the "adhesive film method" proposed by the Japan Food Analysis Center, th...

Embodiment 3

[0047] (1) Compression molding of 1Cr17 ferritic stainless steel powder into a green disc;

[0048](2) In terms of parts by weight, add 20 parts of zinc powder to 80 parts of 1Cr17 ferritic stainless steel powder and mix them thoroughly to form a mixed powder;

[0049] (3) Secondary molding is carried out by the molding method, and the outer surface of the green disc made in (1) is uniformly covered with the mixed powder made in (2), and then sintered at 1100°C to form a surface antibacterial layer and Composite stainless steel plate composed of ordinary stainless steel matrix;

[0050] (4) The composite stainless steel pan made in (3) is heated to 800°C and then air-cooled.

[0051] The powder metallurgy composite ferritic antibacterial stainless steel plate is prepared. Using the "adhesive film method" comparative test proposed by the Japan Food Analysis Center, the antibacterial effect reached 95% after the observation of Escherichia coli and Staphylococcus aureus at 35℃×24h on...

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PUM

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Abstract

The invention involves preparation method of powder metallurgy composite antibiotic non-corrodible steel equipment, it includes: shaping non-corrodible steel powder and preparing green compact; adding antibiotic metal powder into non-corrodible steel powder and preparing mixing powder; shaping the green compact and mixing powder in one time, coating the outside of green compact with mixing powder uniformly, then adglutinating, preparing the powder metallurgy composite antibiotic non-corrodible steel equipment after thermal treatment, the equipment includes the integral body of knives, scissors, clamps, forks, bowls, pans, spoons, tweezers, cups or its combinations. The antibiotic metal ion in the surface antibiotic layer can make the equipment play antibiotic role in the utilization process.

Description

Technical field [0001] The invention relates to stainless steel appliances for food and its processing, daily life, and medical treatment, in particular to powder metallurgy composite antibacterial stainless steel appliances and a preparation method thereof. Background technique [0002] Harmful microorganisms in the natural world seriously threaten human health, and millions of people all over the world die from bacterial infections every year. The way humans are infected with bacteria is mainly through imported food and contact with bacteria. Kitchenware, daily utensils, especially medical appliances that directly contact food often become the source of microbial growth and reproduction. Food industry, medical and health industries, and general households There is an increasing demand for kitchenware and medical appliance products with excellent bacteria and antibacterial properties. [0003] Antibacterial materials refer to materials that have the function of killing or inhibi...

Claims

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Application Information

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IPC IPC(8): B22F3/16B22F3/24
Inventor 车晓舟
Owner SOUTH CHINA UNIV OF TECH
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