CN105331903A - High-strength anticorrosive antibacterial medical gastroscope stainless steel wire and manufacturing method thereof - Google Patents

Abstract

The invention discloses a high-strength anticorrosive antibacterial medical gastroscope stainless steel wire and a manufacturing method thereof. The stainless steel wire is mainly composed of, by mass, 0.60 to 0.10 part of C, less than 1.00 part of Si, less than 2.0 parts of Mn, less than 0.045 part of P, less than 0.03 part of S, 6 to 8 parts of Ni, 18 to 20 parts of Cr, 0.1 to 0.2 part of N and the balance Fe and inevitable impurities. The manufacturing method of the stainless steel wire includes the following process steps of membrane treatment and drying; rough drawing, washing and reeling; washing, N permeation and bright annealing of a table furnace; treatment and drying; and water tank drawing. By the adoption of the stainless steel wire and the manufacturing method, noble metal materials such as Ni and Mo are saved, a production procedure is shortened, the energy consumption per unit yield is reduced, and the surface of the wire is smoother.

Description

The medical gastroscope Stainless Steel Wire of high intensity corrosion resistant antibiotic type and manufacture method thereof

Technical field

The present invention relates to the medical gastroscope Stainless Steel Wire of a kind of high intensity corrosion resistant antibiotic type and manufacture method.

Background technology

At present, along with people are to growth in the living standard, to the concern of own health problem, medical stainless steel silk consumption constantly increases.Most or the high-carbon steel wire adopted before the nineties, and the polyurethane plastics that one deck prevents steel wire corroded by gastric juice are crossed on high-carbon steel wire surface, but high-carbon steel wire very easily gets rusty in process of production, still can get rusty inside steel wire even if plate in polyurethane plastics, time has been grown and may also can break, and therefore on reality is medical, there is great risk.After the nineties, a large amount of austenitic stainless steel that adopts makes gastroscope line both at home and abroad, the general Stainless Steel Wire adopting 316 trades mark, and it mainly forms C:0.08 by the alloying element of following massfraction, Si:1.0, Mn:2.0, P:0.045, S:0.03, Ni:10-14, Cr:16-18, Mo:2.0-3.0.The steel wire diameter of this Stainless Steel Wire is 0.4-0.6mm.

Present China gastroscope Stainless Steel Wire about reaches 5000 tons, but, Ni, Mo are more rare metals, some Ni mineral products states of Abroad in Recent Years are to the controlled production of resource, this resource domestic is relatively deficient again, also output the stainless steel of a series of new trade mark both at home and abroad for this reason, as far as possible with lacking with economizing on Ni under the prerequisite meeting performance, some scarcity metals such as Mo.

Summary of the invention

The defect that the present invention seeks to exist for prior art provides the medical gastroscope Stainless Steel Wire of a kind of high intensity corrosion resistant antibiotic type and manufacture method thereof.

The present invention for achieving the above object, adopts following technical scheme:

The medical gastroscope Stainless Steel Wire of a kind of high intensity corrosion resistant antibiotic type, described Stainless Steel Wire is mainly made up of the alloying element of following mass fraction: C0.60-0.10, Si<1.00, Mn<2.0, P<0.045, S<0.03, Ni6-8, Cr18-20, N0.1-0.2, all the other are Fe and some inevitable impurity.

A manufacture method for the medical gastroscope Stainless Steel Wire of high intensity corrosion resistant antibiotic type, comprises following processing step:

1), epithelium process, oven dry

Adopt the wire rod of film agent to Φ 5.5mm wire diameter to carry out surperficial epithelium process, then dry in an oven, oven temperature is 120 degree, and drying time is more than 0.5 hour;

2), rough, cleaning, take-up

Wire rod after oven dry is continuous multiple tracks drawing on drawing wire machine, and first adopts the draft of 30%, and to successively decrease draft by road, carry out the drawing of 6-7 road altogether, but clean, take-up, finished product reserves the process redundancy of 1.2-1.5mm, so that follow-up bright drawing later;

3), cleaning, desk stove ooze N clean annealing

First clean-out system is adopted to clean after adopting H-wheel unwrapping wire, then wash, preheating oven skin drying, enter desk stove pipeline, the furnace temperature peak value of desk stove controls at 1200-1300 degree, and linear velocity 20-30m/ divides, and passes into the mixed gas protected of hydrogen and nitrogen in pipeline, cooling tank pipeline water-cooled, double finished wire rod carries out take-up;

4), epithelium process, oven dry

Adopt film agent double finished wire rod to carry out surface treatment, then adopt temperature to be 120 degree in an oven and dry, drying time is more than 0.5 hour;

5), water tank draws

Adopting multiple tracks continous way cone pulley water-tank lorry, through the lubricating system of 10-12 road mold lubrication water, by step 4) wire rod after process pulls out trimmed size continuously.

Beneficial effect of the present invention: adopt Stainless Steel Wire of the present invention and manufacture method not only to save the noble metal materials such as Ni, Mo, and Production Flow Chart is shortened, per unit area yield energy consumption reduces, and wire surface is brighter and cleaner.

Embodiment

The present invention relates to the medical gastroscope Stainless Steel Wire of a kind of high intensity corrosion resistant antibiotic type, described Stainless Steel Wire is mainly made up of the alloying element of following mass fraction: C0.60-0.10, Si<1.00, Mn<2.0, P<0.045, S<0.03, Ni6-8, Cr18-20, N0.1-0.2, all the other are Fe and some inevitable impurity.

Wherein, the theoretical foundation that above-mentioned alloy part constituent content is determined is:

Nickel equivalent:

Nickel equivalent=Ni%+30X% (C+N)+0.5X%Mn, the numeral before each element is that this element formation austenite ability is equivalent to the multiple that Ni forms this ability of Ovshinsky.

1), the content of Ni is determined

Can see that from formula existing Ni is important element in austenitic stainless steel, it forms austenitic primary element, because the contribution of Ni in stainless steel is many-sided, outside formation austenite, improve stainless erosion resistance, improve the plasticity and toughness etc. of steel, so Ni is indispensable element in austenitic stainless steel.But stainless steel wire is contact with hydrochloric acid in gastric juice the short period of time when gastroscope line is applied, the requirement for erosion resistance is not very harsh, and can by adding N to replace part Ni.So it is feasible that the present invention suitably reduces Ni content, it is feasible that Ni content is on average fallen 4-8% by the present invention, determines that Ni content is 6-8%.

2), the determination of C content

C forms the strongest element of austenitic stainless steel ability, is 30 speeds of Ni.But generally do not adopt C as the austenitic principal element of formation in austenitic stainless steel, because along with the increase of C content, the intensity of steel improves greatly, plasticity and toughness, cold formability etc. can bright industry reduce, but C content again can not be too low, otherwise the intensity of steel can not be guaranteed, therefore C content determines at 0.06-0.1% it is rational

3), the determination of N content

N does not still form one of austenitic element, N significantly carries on a shoulder pole the intensity of high austenite steel by solution strengthening simultaneously, the plasticity and toughness, the cold formability etc. that are both steel do not have obvious reduction, be equivalent to 4.5%Ni form austenitic ability when N content reaches 0.15%.According to corrosion-resistant equivalent energy value PRE=Cr%+3.3XMo%+16XN% formula, N can improve 16 times that anti-corrosion capability is Cr, and N element is very easy to obtain, just can extract in air and act on significantly, add and also facilitate, may cross and be blown into N gas to the concise stove of AOD and reach 0.2% or carry out wire surface ooze N process to adding N gas in annealing furnace to the N content improved in steel.

4), the determination of Cr content

Cr has absolute effect to stainless steel erosion resistance, and along with the increase of Cr content, stainless steel erosion resistance also can correspondingly improve, but total amount is generally no less than 13% otherwise erosion resistance can be influenced, and the present invention retains original Cr content 18%-20%.

It is feasible for carrying out suitably adjustment to main elementary composition content in 316 trades mark in sum, take to reduce Ni and add N, when Mo removes guarantee Cr, namely stable Ovshinsky tissue may be obtained, the tensile strength of steel can not obviously reduce, erosion resistance enough meets use occasion, meets the processing performance requirement of gastroscope line completely.Therefore this grade of steel is reasonable in design and economic and practical.

The manufacture method of the medical gastroscope Stainless Steel Wire of the present invention, comprises following processing step:

1), epithelium process, oven dry

Adopt the wire rod of film agent to Φ 5.5mm wire diameter to carry out surperficial epithelium process, then dry in an oven, oven temperature is 120 degree, and drying time is more than 0.5 hour;

2), rough, cleaning, take-up

Wire rod after oven dry is continuous multiple tracks drawing on drawing wire machine, and first adopts the draft of 30%, and to successively decrease draft by road, carry out the drawing of 6-7 road altogether, but clean, take-up, finished product reserves the process redundancy of 1.2-1.5mm, so that follow-up bright drawing later;

3), cleaning, desk stove ooze N clean annealing

First clean-out system is adopted to clean after adopting H-wheel unwrapping wire, then wash, preheating oven skin drying, enter desk stove pipeline, the furnace temperature peak value of desk stove controls at 1200-1300 degree, and linear velocity 20-30m/ divides, and passes into the mixed gas protected of hydrogen and nitrogen in pipeline, cooling tank pipeline water-cooled, double finished wire rod carries out take-up;

4), epithelium process, oven dry

Adopt film agent double finished wire rod to carry out surface treatment, then adopt temperature to be 120 degree in an oven and dry, drying time is more than 0.5 hour;

5), water tank draws

Adopting multiple tracks continous way cone pulley water-tank lorry, through the lubricating system of 10-12 road mold lubrication water, by step 4) wire rod after process pulls out trimmed size continuously.

Through salt business test in 72 hours, the steel wire gone out through explained hereafter of the present invention does not find that Steel Wire Surface has corrosion spot, reaches use occasion requirement completely.Finished product tensile strength (N/m ㎡) 1900-2000, the finished product that tensile strength is also done with 316 trades mark is suitable.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. the medical gastroscope Stainless Steel Wire of high intensity corrosion resistant antibiotic type, it is characterized in that, described Stainless Steel Wire is mainly made up of the alloying element of following mass fraction: C0.60-0.10, Si<1.00, Mn<2.0, P<0.045, S<0.03, Ni6-8, Cr18-20, N0.1-0.2, all the other are Fe and some inevitable impurity.

2. a manufacture method for the medical gastroscope Stainless Steel Wire of high intensity corrosion resistant antibiotic type as claimed in claim 1, is characterized in that, comprise following processing step:

1), epithelium process, oven dry

Adopt the wire rod of film agent to Φ 5.5mm wire diameter to carry out surperficial epithelium process, then dry in an oven, oven temperature is 120 degree, and drying time is more than 0.5 hour;

2), rough, cleaning, take-up

Wire rod after oven dry is continuous multiple tracks drawing on drawing wire machine, and first adopts the draft of 30%, and to successively decrease draft by road, carry out the drawing of 6-7 road altogether, but clean, take-up, finished product reserves the process redundancy of 1.2-1.5mm, so that follow-up bright drawing later;

3), cleaning, desk stove ooze N clean annealing

First clean-out system is adopted to clean after adopting H-wheel unwrapping wire, then wash, preheating oven skin drying, enter desk stove pipeline, the furnace temperature peak value of desk stove controls at 1200-1300 degree, and linear velocity 20-30m/ divides, and passes into the mixed gas protected of hydrogen and nitrogen in pipeline, water-cooled, double finished wire rod carries out take-up;

4), epithelium process, oven dry

Adopt film agent double finished wire rod to carry out surface treatment, then adopt temperature to be 120 degree in an oven and dry, drying time is more than 0.5 hour;

5), water tank draws

Adopting multiple tracks continous way cone pulley water-tank lorry, through the lubricating system of 10-12 road mold lubrication water, by step 4) wire rod after process pulls out trimmed size continuously.