CN102560281A - Preparation method of martensitic stainless steel having broad-spectrum antimicrobial effects - Google Patents

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 1160 to 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 hours for aging treatment and cooling in air.

Description

A kind of preparation method with Martensite Stainless Steel of broad-spectrum antibacterial action

Technical field

The present invention relates to the ferrous metallurgy field, particularly a kind of preparation method of Martensite Stainless Steel.

Background technology

Stainless steel came out from last century, till now the history in existing more than 90 year.Stainless invention is a significant achievement on world's history of metallurgy, and stainless production has been established important material technological foundation for industrial and scientific-technical progress.It has progressively formed ferrite type stainless steel, martensite type stainless steel, Austenitic stainless steel, austenite～ferrite type duplex stainless steel four big classes in evolution.

As everyone knows, silver, copper have restraining effect to the growth of bacterium, before 1000 Christian eras, just are used as drinking vessel and medical instruments.The incomparable meliority of other material that stainless steel itself has makes people rise the research to the anti-bacteria stainless steel of cupric, silver in the nineties in 20th century.Japan in this area research starting early.JP849085A discloses through magnetron sputtering technique and has formed the metal level of the Cr, Ti, Ni or the Fe that contain silver and/or copper or the anti-bacteria stainless steel plate of alloy layer on the surface of stainless steel base material.

CN1111612C discloses the method for manufacture of silver containing stainless steel, through adding 0.0001～1% silver and under 700～1180 ℃ of temperature, annealing, makes silver particles, silver oxide and the silver-colored sulfide of separating out in the stainless steel below the median size 500 μ m.

Disclose antibacterial member of processing by ferritic stainless steel and preparation method thereof among the CN 1072732C, improved stainless bacterinertness through copper that adds 0.4～3 weight % and the copper-rich phase of separating out with the ratio of 2.0 volume %.In this patent, also mentioned the preparation method of the Martensite Stainless Steel of cupric 0.4～3 weight %, separated out the anti-microbial property that copper-rich phase improves Martensite Stainless Steel through 500～900 ℃ of annealing after hot rolling.General Martensite Stainless Steel goods must obtain higher hardness to satisfy request for utilization through quenching and tempering before use; But in this patent only in the martensitic stainless steel of anneal copper-rich phase solid solution again will take place in follow-up quenching, and can cause antibiotic rate to descend thus even disappear.And, do not show rapidity, persistence and the broad spectrum antibacterial of its anti-microbial property in this patent.

Summary of the invention

To the deficiency of prior art, one of the object of the invention is to provide a kind of preparation method with Martensite Stainless Steel of broad-spectrum antibacterial action, and this stainless steel has favorable mechanical performance and corrosion resistance nature preferably simultaneously.

For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:

A kind of preparation method with Martensite Stainless Steel of broad-spectrum antibacterial action is characterized in that, this stainless steel is made up of following component in per-cent (weight): C:0.1～0.3%, Si:0.6～0.8%; Mn:1.6～1.8%, P≤0.04%, S≤0.03%, Cr:13～15%; Ni:0.5～0.7%, Cu:2.2～2.4%, Ag:0.2～0.4%; Ti:1.3～1.5%, V:0.4～0.6%, Zr:0.2～0.4%; Mo:3.4～3.6%, surplus are Fe and unavoidable impurities, and said preparation method comprises:

1. prepare master alloy: before smelting, earlier Ag and two kinds of elements of Cu are processed master alloy according to the melting of above-mentioned interpolation proportioning, more said master alloy is added as a kind of batching;

2. smelt: adopt electric furnace-AOD-VOD to smelt, and cast;

3. rolling: carry out hot rolling earlier, then earlier through about 860～880 ℃ of annealing, carry out again cold rolling, then in about 1030～1050 ℃ of annealing, pickling, polishing.

4. antibioticization processing: at first under about 1160～1180 ℃ of conditions, be incubated 1～2 hour, air cooling is to room temperature afterwards; Ageing treatment then: about 530～550 ℃ of insulations 8～10 hours, air cooling was to room temperature then.

Beneficial effect of the present invention is:

(1) the present invention has carried out optimization design to stainless chemical ingredients; Adopt orthogonal test; Filter out best Cu and the content range of Ag, consider over-all propertieies such as solidity to corrosion and mechanical property simultaneously, filter out the optimum content scope of alloy element Si, Mn, Cr, Ni, Ti, Zr, V and Mo; Make that the technique effect that each alloy element played is collaborative each other, make that the performance of this antibacterial martensitic stainless steel is best.

(2) of the present inventionly carry out solid solution and ageing treatment then, guarantee its anti-microbial property thereby separate out nanometer ε～Cu phase through after hot rolling and the cold-rolling treatment.

(3) stainless steel of the present invention has kept original steel grade excellent mechanical property and corrosion resistance, and has good broad spectrum antibacterial performance, can suppress and kill various common bacteriums, and effect is lasting.

Embodiment

Embodiment one

A kind of preparation method with Martensite Stainless Steel of broad-spectrum antibacterial action, this stainless steel is made up of following component in per-cent (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%, surplus is Fe and unavoidable impurities, said preparation method comprises:

1. prepare master alloy: before smelting, earlier Ag and two kinds of elements of Cu are processed master alloy according to the melting of above-mentioned interpolation proportioning, more said master alloy is added as a kind of batching;

2. smelt: adopt electric furnace-AOD-VOD to smelt, and cast;

3. rolling: carry out hot rolling earlier, then earlier through 860 ℃ of annealing, carry out again cold rolling, then in 1050 ℃ of annealing, pickling, polishing.

4. antibioticization processing: at first under 1160 ℃ of conditions, be incubated 2 hours, air cooling is to room temperature afterwards; Ageing treatment then: 530 ℃ of insulations 10 hours, air cooling was to room temperature then.

Embodiment two

A kind of preparation method with Martensite Stainless Steel of broad-spectrum antibacterial action, this stainless steel is made up of following component in per-cent (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%, surplus is Fe and unavoidable impurities, said preparation method comprises:

1. prepare master alloy: before smelting, earlier Ag and two kinds of elements of Cu are processed master alloy according to the melting of above-mentioned interpolation proportioning, more said master alloy is added as a kind of batching;

2. smelt: adopt electric furnace-AOD-VOD to smelt, and cast;

3. rolling: carry out hot rolling earlier, then earlier through 880 ℃ of annealing, carry out again cold rolling, then in 1030 ℃ of annealing, pickling, polishing.

4. antibioticization processing: at first under 1180 ℃ of conditions, be incubated 1 hour, air cooling is to room temperature afterwards; Ageing treatment then: 550 ℃ of insulations 8 hours, air cooling was to room temperature then.

Embodiment three

A kind of preparation method with Martensite Stainless Steel of broad-spectrum antibacterial action, this stainless steel is made up of following component in per-cent (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%, surplus is Fe and unavoidable impurities, said preparation method comprises:

1. prepare master alloy: before smelting, earlier Ag and two kinds of elements of Cu are processed master alloy according to the melting of above-mentioned interpolation proportioning, more said master alloy is added as a kind of batching;

2. smelt: adopt electric furnace-AOD-VOD to smelt, and cast;

3. rolling: carry out hot rolling earlier, then earlier through 870 ℃ of annealing, carry out again cold rolling, then in 1040 ℃ of annealing, pickling, polishing.

4. antibioticization processing: at first under 1170 ℃ of conditions, be incubated 1.5 hours, air cooling is to room temperature afterwards; Ageing treatment then: 540 ℃ of insulations 9 hours, air cooling was to room temperature then.

Applicant's statement; The present invention explains detailed process equipment of the present invention and technical process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technical process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technical process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.

Claims (1)

1. the preparation method with Martensite Stainless Steel of broad-spectrum antibacterial action is characterized in that, this stainless steel is made up of following component in per-cent (weight): C:0.1～0.3%, Si:0.6～0.8%; Mn:1.6～1.8%, P≤0.04%, S≤0.03%, Cr:13～15%; Ni:0.5～0.7%, Cu:2.2～2.4%, Ag:0.2～0.4%; Ti:1.3～1.5%, V:0.4～0.6%, Zr:0.2～0.4%; Mo:3.4～3.6%, surplus are Fe and unavoidable impurities, and said preparation method comprises:

1. prepare master alloy: before smelting, earlier Ag and two kinds of elements of Cu are processed master alloy according to the melting of above-mentioned interpolation proportioning, more said master alloy is added as a kind of batching;

2. smelt: adopt electric furnace-AOD-VOD to smelt, and cast;

3. rolling: carry out hot rolling earlier, then earlier through about 860～880 ℃ of annealing, carry out again cold rolling, then in about 1030～1050 ℃ of annealing, pickling, polishing.

4. antibioticization processing: at first under about 1160～1180 ℃ of conditions, be incubated 1～2 hour, air cooling is to room temperature afterwards; Ageing treatment then: about 530～550 ℃ of insulations 8～10 hours, air cooling was to room temperature then.