CN104294150B - Steel and production method thereof for shielding line - Google Patents
Steel and production method thereof for shielding line Download PDFInfo
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- CN104294150B CN104294150B CN201410603759.9A CN201410603759A CN104294150B CN 104294150 B CN104294150 B CN 104294150B CN 201410603759 A CN201410603759 A CN 201410603759A CN 104294150 B CN104294150 B CN 104294150B
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Abstract
This discloses a kind of shielding line steel and production method thereof, and the chemical composition of this steel is counted according to percentage by weight: C:0.001～0.05, Si:0.001～0.1, Mn:0.05～0.20, P≤0.015, S≤0.010, Ti:0.01～0.25, surplus is Fe and inevitable impurity. Its production method, undertaken by common clean steel technique, comprise the following steps: blast-melted desulfurization processing, converter smelting, Argon, the processing of RH stove, continuous casting, square billet examination, square billet heating, high speed wire rolling, stelmor control are cold, the step of collection volume, bailing. Facts have proved, the intensity of this steel is high, good toughness, lightweight, and this production method technique is simple, easy to operate simultaneously.
Description
Technical field
The present invention relates to electrical equipment cable steel technical field, specifically refer to a kind of shielding line steelAnd production method.
Background technology
Widely used shielding line in electrical equipment cable industry, be mainly in the past made by fine copper andBecome. In recent years, because having, purity of steel is high, flow harden with steel for Ultra-low carbon shielding lineThe features such as little and fabulous drawing property, fabulous function of shielding, are widely used in variousShielding line is made. Ultralow shielding line, and is produced with fine copper for the production of shielding line with steel wire rodShielding line compare, because it has that intensity is high, good toughness, lightweight and shield effectiveness goodFeature, develop the Regeneration variety that becomes the latter rapidly, marketing is enormously potential.Meanwhile, because this steel will have fabulous cold-workability and toughness, high to production technology content,Therefore this product made from steel has good economic and social benefit. But before the present invention, marketOn also there is no a kind of high comprehensive performance shielding line steel and production method thereof.
Summary of the invention
Object of the present invention is exactly will be for the deficiencies in the prior art, provide a kind of intensity high,Good toughness, lightweight shielding line steel, this provides the production method of this steel simultaneously, and this is rawProduct method technique is simple, easy to operate.
For achieving the above object, shielding line steel of the present invention, its chemical composition is according to weightPercentage is counted: C:0.001～0.05, and Si:0.001～0.1, Mn:0.05～0.20, P≤0.015,S≤0.010, Ti:0.01～0.25, surplus is Fe and inevitable impurity.
Preferably, this steel chemical composition is counted according to percentage by weight: C:0.001～0.005,Si：0.001～0.01，Mn：0.08～0.10，P≤0.015，S≤0.010，Ti：0.05～0.15，Surplus is Fe and inevitable impurity.
The production method of steel for shielding line of the present invention, is undertaken by common clean steel technique,Comprise the following steps: blast-melted desulfurization processing, converter smelting, Argon, the processing of RH stove,Continuous casting, square billet examination, square billet heating, high speed wire rolling, stelmor control are cold, collection volume, beatThe step of bale packaging, wherein:
When described blast-melted desulfurization is processed, adopt spray magnesium powder sulfur removal technology, S while controlling departuresWeight percentage≤0.010%;
When described converter smelting, omnidistance top bottom blowing, the each element wt hundred of terminal controlDivide content to be: C≤0.06%, S≤50ppm, tapping target temperature is 1630～1700 DEG C;
When described Argon, control argon pressure is 0.3～1.0MPa, and argon flow amount is5.0～15.0Nm3/ min. Preferably, arrive at a station Argon 3～10min, the then large tank top of the slag of molten steelSpill aluminum shot and calcium carbide, aluminum shot consumption is molten steel 45～55kg per ton, and calcium carbide consumption is molten steel per ton10～20kg；
When described RH stove is processed, add aluminum shot and carry out final deoxidizing, in final deoxidizing steel, free oxygen reachesAfter below 0.0015%, add Ti-Fe and carry out alloying, the RH stove processing time is 20～30min;Preferably, fine setting Mn, ensures that the manganese sulphur ratio of steel is greater than 10;
When described continuous casting, in target, wrapping molten steel overheat is 20～40 DEG C, and pulling rate is0.5～1.0m/min；
When described square billet heating, bringing-up section temperature is 1100～1200 DEG C, and soaking zone temperature is1180 ± 30 DEG C, the section temperature difference≤30 DEG C, time inside furnace is 120～180min;
When described high speed wire rolling, roughing start rolling temperature is 1060 ± 30 DEG C, finishing mill inlet temperatureBe 910 ± 15 DEG C, reducing sizing mill inlet temperature is 900 ± 10 DEG C;
When described stelmor control is cold, laying temperature is 880 ± 10 DEG C, stelmor control cold lineRoller table speed setting scheme is: the steel of Ф 5.5～8.5mm specification, entrance velocity is 0.10～0.30M/s, maximal rate is 0.30～0.50m/s; The steel of Ф 9～12mm specification, entrance velocity is0.20～0.50m/s, maximal rate is 0.30～0.60m/s; The steel of Ф 12.5～17mm specification,Entrance velocity is 0.20～0.70m/s, and maximal rate is 0.30～0.90m/s.
Shielding line of the present invention is with mechanism and the effect of each constituent content control in steel and producedIn journey, technological parameter setting principle is as follows:
Shielding line steel of the present invention, produces cold work hardening Elements C, Si, Mn content allVery low, this steel is also very low to P, S content requirement, as much as possible to improve the cold working of steelPerformance. The poker effect that Ti in steel can play equal even crystal grain thinnings and improve wire rod, withImprove the cold punching performance of steel. The Main Function of Ti in steel is fixed nitrogen and solid carbon, eliminates theseInterstitial atom, makes steel wire in the time of braiding, not produce folding line.
In the production method of steel of the present invention, process for making is to make C, Si, S content as far as possible allVery low, after tapping, large tank is made new slag, carries out large tank slag upgrading. When argon station Argon, control wellArgon pressure, argon flow amount, the molten steel argon blowing time of arriving at a station, the large tank top of the slag spills aluminum shot calcium carbide and entersRow slag upgrading, then after micro-blowing, after thermometric, sampling, rise and winch to RH stove. Can be past large at argon stationThe tank top of the slag spills aluminum shot etc. iron oxide total amount (TFe)+MnO in slag is reduced to 3～15%, in steelFree oxygen be controlled at 0.04～0.15%, make slag there is certain reproducibility, prevent molten steel twoInferior oxidation, but do not affect the decarburization of RH stove. Enter decarburization after RH refining furnace, deoxidation is adjustedComposition, treats that in steel, free oxygen is less than 0.0015%, adds ferrotianium to carry out Alloying Treatment. AlloyChange, according to the content of Mn in molten steel, while going out molten steel 1/3, start to add ferromanganese with steel stream, go outBefore steel 2/3, add, in steel, Mn investigates the evidence of a case harvest and divides lower limit control. Continuous casting improves molten steel as far as possibleThe calm time, middle bag baking is dry, protection cast; Ensure that strand low power is without rimhole;Casting billet surface is smooth, and cutting knurl wants reconditioning to fall, and casting billet surface injustice is less than 2mm. Suitably followUpper continuous casting after ring. When continuous casting, large bag adopts long nozzle to middle bag, and crystallizer adopts immersionMouth of a river protection cast. In target, wrap 20～40 DEG C of molten steel overheats (liquidus temperature=1528 DEG C).Pulling rate 0.5～1.0m/min. Tundish adopts Mg matter covering slag, and crystallizer adopts carbon-free protectionSlag. Electromagnetic agitation, adopts end electromagnetic agitation. Secondary cooling water, with the control of soft1# water meter. WaterNote process is strictly by the degree of superheat and pulling rate match control. When rolling, before steel rolling, be to equipment,Particularly rolling mill guiding is wanted close inspection, ensures wire rod surface quality. When rolling, heater1100～1200 DEG C of skill bringing-up section temperature. 1180 ± 30 DEG C of soaking zone temperature, the section temperature difference≤ 30 DEG C. Furnace pressure keeps pressure-fired, and furnace atmosphere keeps weak reducing atmosphere. Time inside furnace:120～180min. Roughing technique, high-pressure water descaling, the necessary standard-sized sheet of each tap, hydraulic pressureNormally, ensure scale removal effect, be strictly on guard against that iron scale in the operation of rolling is pressed into the matrix of steel; OpenRoll 1060 ± 30 DEG C of temperature. Finish-rolling process, 910 ± 15 DEG C of finishing mill inlet temperatures. Subtract sizing900 ± 10 DEG C of machine inlet temperatures. Cooling control technology, 880 ± 10 DEG C of laying temperatures. Stelmor controlCold line roller table speed is set. Blower fan and insulation cover, last Fans standard-sized sheet, all the other are closed.The 1st group and 5～8 groups of insulation covers are opened, and all the other are closed, and the average cooling rate of wire rod is existed0.5～1.5℃/s。
Facts have proved, the shielding line steel that utilizes the inventive method to produce, what have is goodCold drawing performance, deformation of products, without yield point elongation and good toughness, can be used for various shieldingsThe manufacture of line.
Detailed description of the invention
Below in conjunction with specific embodiment, shielding line of the present invention is done into one by steel and production method thereofStep describes in detail.
Embodiment 1
A kind of shielding line steel, according to composition of steel requirement, its molten steel chemical composition is: C:0.001％、Si：0.01％、Mn：0.15％、P：0.005％、S：0.009％、Ti：0.01％，Surplus is Fe and inevitable impurity.
The production method of steel for this shielding line, is undertaken by common clean steel technique, comprises followingStep: blast-melted desulfurization processing, converter smelting, Argon, the processing of RH stove, continuous casting, sideBase examination, square billet heating, high speed wire rolling, stelmor control are cold, collection volume, bailingStep, wherein,
When blast-melted desulfurization is processed: adopt spray magnesium powder sulfur removal technology, S while controlling departuresSuffer percentage composition≤0.010%;
When converter smelting, omnidistance top bottom blowing, the each constituent content of terminal control[C]≤0.06%, [S]≤50ppm, tapping target temperature is 1640 DEG C;
When Argon, argon pressure is 0.6MPa, and argon flow amount is 10Nm3/ min, molten steel arrivesThe Argon of standing 8min, then the large tank top of the slag spills aluminum shot and calcium carbide, and aluminum shot consumption is molten steel per ton50kg, calcium carbide consumption is molten steel 15kg per ton;
When described RH stove is processed, add aluminum shot and carry out final deoxidizing, in final deoxidizing steel, free oxygen reachesAfter below 0.0015%, add Ti-Fe and carry out alloying, fine setting Mn, the manganese sulphur ratio of guarantee steelBe greater than 10; RH stove is processed 25min;
When described continuous casting, in target, wrapping molten steel overheat is 30 DEG C, and pulling rate is 0.8m/min;
When square billet heating, soaking zone temperature is 1210 DEG C, and the section temperature difference≤30 DEG C are protected at stoveThe temperature time is 120min, makes the abundant austenitizing of steel;
When high speed wire rolling, product diameter 8.5mm, roughing start rolling temperature is 1090 DEG C, finish rollingMachine inlet temperature is 925 DEG C, and reducing sizing mill inlet temperature is 910 DEG C;
When stelmor control is cold, laying temperature is 870 DEG C, stelmor control cold line roller table speedSetting scheme is: the steel of Ф 8.5mm specification, and entrance velocity is 0.30m/s, maximal rate is0.50m/s, blower fan and insulation cover: last Fans standard-sized sheet, all the other are closed. The 1st group and5～8 groups of insulation covers are opened, and all the other are closed, and make the average cooling rate of wire rod at 0.5～1.5 DEG C/s,Collection volume cool to room temperature after 700 DEG C.
Embodiment 2
A kind of shielding line steel, according to composition of steel requirement, its molten steel chemical composition by weight hundredProportion by subtraction is: C:0.002%, Si:0.008%, Mn:0.12%, P:0.007%, S:0.003%,Ti:0.03%, surplus is Fe and inevitable impurity.
The production method of steel for this shielding line, basic step is with embodiment 1, and difference is:
When Argon: argon pressure is 0.7MPa, argon flow amount is 12Nm3/ min, molten steel arrivesThe Argon of standing 7min, then the large tank top of the slag spills aluminum shot and calcium carbide, and aluminum shot consumption is molten steel per ton52kg, calcium carbide consumption is molten steel 15kg per ton;
When continuous casting, in target, wrapping molten steel overheat is 40 DEG C, and pulling rate is 1.0m/min;
When square billet heating, soaking zone temperature is 1150 DEG C, and the section temperature difference≤30 DEG C, in the time of stoveBetween be 135min; So that the abundant austenitizing of steel. Austenitizing temperature and time become with steelPoint relevant, guarantee the complete solid solution of alloying element in steel, furnace pressure keeps pressure-fired, in stoveAtmosphere keeps weak reducing atmosphere.
When high speed wire rolling, product diameter 7.5mm, roughing start rolling temperature is 1080 DEG C, finish rollingMachine inlet temperature is 920 DEG C, and reducing sizing mill inlet temperature is 905 DEG C; When stelmor control is cold,Laying temperature is 885 DEG C, and stelmor control cold line roller table speed setting scheme is: entrance velocity0.25m/s, maximal rate 0.45m/s, blower fan and insulation cover: last Fans standard-sized sheet, itsMore than close. The 1st group and 5～8 groups of insulation covers are opened, and all the other are closed, and make the on average cold of wire rodSpeed is at 0.5～1.5 DEG C/s, collection volume cool to room temperature after 700 DEG C.
Embodiment 3
A kind of shielding line steel, according to composition of steel requirement, its molten steel chemical composition is: C:0.003％、Si：0.006％、Mn：0.10％、P：0.009％、S：0.005％、Ti：0.10%, surplus is Fe and inevitable impurity. Product diameter 6.5mm.
The production method of steel for this shielding line, basic step is with embodiment 1, and difference is:
When Argon: argon pressure is 0.4MPa, argon flow amount is 15.0Nm3/ min, molten steelThe Argon of arriving at a station 10min, then the large tank top of the slag spills aluminum shot and calcium carbide, and aluminum shot consumption is molten steel per ton50kg, calcium carbide consumption is molten steel 15kg per ton;
When continuous casting, in target, wrapping molten steel overheat is 35 DEG C, and pulling rate is 0.9m/min;
When square billet heating, soaking zone temperature is 1180 DEG C, and the section temperature difference≤30 DEG C, in the time of stoveBetween be that 145min is so that the abundant austenitizing of steel;
When described high speed wire rolling, product diameter 6.5mm, roughing start rolling temperature is 1060 DEG C,Finishing mill inlet temperature is 910 DEG C, and reducing sizing mill inlet temperature is 900 DEG C;
When stelmor control is cold, laying temperature is 880 DEG C, stelmor control cold line roller table speedSetting scheme is: entrance velocity 0.20m/s, and maximal rate 0.40m/s, blower fan and insulation cover:Last Fans standard-sized sheet, all the other are closed. The 1st group and 5～8 groups of insulation covers are opened, all the otherClose, make the average cooling rate of wire rod at 0.5～1.5 DEG C/s, collection volume cool to room temperature after 700 DEG C.
Embodiment 4
A kind of shielding line steel, according to composition of steel requirement, its molten steel chemical composition is: C:0.004％、Si：0.004％、Mn：0.08％、P：0.011％、S：0.008％、Ti：0.15%, surplus is Fe and inevitable impurity.
This shielding line is by the production method basic step of steel with embodiment 1, and difference is:
When Argon: argon pressure is 0.6MPa, argon flow amount is 11Nm3/ min, molten steel arrivesThe Argon of standing 7min, then the large tank top of the slag spills aluminum shot and calcium carbide, and aluminum shot consumption is molten steel per ton48kg, calcium carbide consumption is molten steel 12kg per ton;
When continuous casting, in target, wrapping molten steel overheat is 25 DEG C, and pulling rate is 0.5m/min;
When heating, soaking zone temperature is 1160 DEG C, the section temperature difference≤30 DEG C, and time inside furnace is150min；
When high speed wire rolling, product diameter 6.0mm. Roughing start rolling temperature is 1050 DEG C, finish rollingMachine inlet temperature is 905 DEG C, and reducing sizing mill inlet temperature is 895 DEG C;
When stelmor control is cold, laying temperature is 875 DEG C, stelmor control cold line roller table speedSetting scheme is: entrance velocity 0.20m/s, and maximal rate 0.35m/s, blower fan and insulation cover:Last Fans standard-sized sheet, all the other are closed. The 1st group and 5～8 groups of insulation covers are opened, all the otherClose, make the average cooling rate of wire rod at 0.5～1.5 DEG C/s, collection volume cool to room temperature after 700 DEG C.
Embodiment 5
A kind of shielding line steel, according to composition of steel requirement, its molten steel chemical composition is: C:0.005％、Si：0.001％、Mn：0.06％、P：0.015％、S：0.002％、Ti：0.25%, surplus is Fe and inevitable impurity.
The production method of steel for this shielding line, basic step is with embodiment 1, and difference is:
When Argon: argon pressure is 0.6MPa, argon flow amount is 10Nm3/ min, molten steel arrivesThe Argon of standing 7min, then the large tank top of the slag spills aluminum shot and calcium carbide, and aluminum shot consumption is molten steel per ton50kg, calcium carbide consumption is molten steel 15kg per ton;
When continuous casting, in target, wrapping molten steel overheat is 40 DEG C, and pulling rate is 0.6m/min;
When heating, soaking zone temperature is 1150 DEG C, the section temperature difference≤30 DEG C, and time inside furnace is160min; When described high speed wire rolling, product diameter 5.5mm, roughing start rolling temperature is 1030 DEG C,Finishing mill inlet temperature is 895 DEG C, and reducing sizing mill inlet temperature is 890 DEG C; Stelmor controlWhen cold, laying temperature is 870 DEG C, and stelmor control cold line roller table speed setting scheme is: enterMouth speed 0.20m/s, maximal rate 0.30m/s, blower fan and insulation cover: last FansStandard-sized sheet, all the other are closed. The 1st group and 5～8 groups of insulation covers are opened, and all the other are closed, and make wire rodAverage cooling rate at 0.5～1.5 DEG C/s, collection volume cool to room temperature after 700 DEG C.
The shielding line that above-described embodiment 1～5 is made is tested with the properties of steel, surveysTest result is shown in Table 1.
Table 1
The testing result of table 1 can find out, shielding line of the present invention all exists by the intensity of steelMore than 250MPa, after user's drawing work hardening, intensity can reach 500MPa left and right, through moving backAfter changing, product intensity can be more than 350MPa, has ensured the high speed netting performance of finished product, this steelCold-forming property good, ensured the requirement of drawing extra fine filament.
Claims (6)
1. a shielding line steel, is characterized in that: this steel chemical composition is according to weight percentThan counting: C:0.001～0.05, Si:0.001～0.1, Mn:0.05～0.20, P≤0.015,S≤0.010, Ti:0.01～0.25, surplus is Fe and inevitable impurity, its producerMethod, is undertaken by common clean steel production technology, comprises the following steps: blast-melted desulfurization,Converter smelting, Argon, the processing of RH stove, continuous casting, square billet are checked and accepted, square billet heats, high line rollsSystem, stelmor control is cold, the step of collection volume, bailing, it is characterized in that:
When described blast-melted desulfurization is processed, adopt spray magnesium powder sulfur removal technology, S while controlling departuresWeight percentage≤0.010%;
When described converter smelting, omnidistance top bottom blowing, the each element wt hundred of terminal controlDivide content to be: C≤0.06%, S≤50ppm, tapping target temperature is 1630～1700 DEG C;
When described Argon, control argon pressure is 0.3～1.0MPa, and argon flow amount is5.0～15.0Nm3/min；
When described RH stove is processed, add aluminum shot and carry out final deoxidizing, in final deoxidizing steel, free oxygen reachesAfter below 0.0015%, add Ti-Fe and carry out alloying, the RH stove processing time is 20～30min;
When described continuous casting, in target, wrapping molten steel overheat is 20～40 DEG C, and pulling rate is0.5～1.0m/min；
When described square billet heating, bringing-up section temperature is 1100～1200 DEG C, and soaking zone temperature is1180 ± 30 DEG C, the section temperature difference≤30 DEG C, time inside furnace is 120～180min;
When described high speed wire rolling, roughing start rolling temperature is 1060 ± 30 DEG C, finishing mill inlet temperatureBe 910 ± 15 DEG C, reducing sizing mill inlet temperature is 900 ± 10 DEG C.
2. shielding line steel according to claim 1, is characterized in that: this tempering is learnedComposition is counted according to percentage by weight: C:0.001～0.005, and Si:0.001～0.01, Mn:0.08～0.10, P≤0.015, S≤0.010, Ti:0.05～0.15, surplus is Fe and can notThe impurity of avoiding.
3. according to shielding line steel described in claim 1 or 2, it is characterized in that: described in blowWhen argon, the molten steel Argon 3～10min that arrives at a station, then the large tank top of the slag spills aluminum shot and calcium carbide, and aluminum shot is usedAmount is molten steel 45～55kg per ton, and calcium carbide consumption is molten steel 10～20kg per ton.
4. according to shielding line steel described in claim 1 or 2, it is characterized in that: described inWhen RH stove is processed, finely tune Mn, ensure that the manganese sulphur ratio of steel is greater than 10.
5. according to shielding line steel described in claim 1 or 2, it is characterized in that: described thisTai Ermo is controlled when cold, and laying temperature is 880 ± 10 DEG C, and stelmor control cold line roller table speed is establishedDetermining scheme is: the steel of Ф 5.5～8.5mm specification, entrance velocity is 0.10～0.30m/s, maximumSpeed is 0.30～0.50m/s; The steel of Ф 9～12mm specification, entrance velocity is 0.20～0.50M/s, maximal rate is 0.30～0.60m/s; The steel of Ф 12.5～17mm specification, entrance velocityBe 0.20～0.70m/s, maximal rate is 0.30～0.90m/s.
6. shielding line steel according to claim 3, is characterized in that: described steyrWhen the control that rubs is cold, laying temperature is 880 ± 10 DEG C, stelmor control cold line roller table speed setting sideCase is: the steel of Ф 5.5～8.5mm specification, entrance velocity is 0.10～0.30m/s, maximal rateBe 0.30～0.50m/s; The steel of Ф 9～12mm specification, entrance velocity is 0.20～0.50m/s,Maximal rate is 0.30～0.60m/s; The steel of Ф 12.5～17mm specification, entrance velocity is0.20～0.70m/s, maximal rate is 0.30～0.90m/s.
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| CN107236902A (en) * | 2017-06-24 | 2017-10-10 | 武汉钢铁有限公司 | A kind of half-hard state cable steel and production method |
| CN107326281A (en) * | 2017-07-12 | 2017-11-07 | 武汉钢铁有限公司 | High welding performance Socket for electrical appliance steel and its production method |
| CN107739770A (en) * | 2017-10-23 | 2018-02-27 | 武汉钢铁有限公司 | One kind reduces ultra-low-carbon steel strand rimhole method |
| CN108062992B (en) * | 2017-11-07 | 2020-06-30 | 邢台钢铁有限责任公司 | Steel wire for copper-clad steel composite shielded wire and production method thereof |
| CN110055471B (en) * | 2019-05-23 | 2020-10-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel with uniform structure performance and low silicon content for welding and preparation method thereof |
| CN111979495B (en) * | 2020-09-29 | 2021-11-09 | 武汉钢铁有限公司 | High-conductivity cable steel for manufacturing thin-film capacitor lead and production method thereof |
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| CN1320170A (en) * | 1999-08-11 | 2001-10-31 | 日本钢管株式会社 | Magnetic shielding steel sheet and method for producing the same |
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