CN100425710C - Steel wire (belt) high-energy continuous electric pulse treating method - Google Patents
Steel wire (belt) high-energy continuous electric pulse treating method Download PDFInfo
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- CN100425710C CN100425710C CNB2005101011485A CN200510101148A CN100425710C CN 100425710 C CN100425710 C CN 100425710C CN B2005101011485 A CNB2005101011485 A CN B2005101011485A CN 200510101148 A CN200510101148 A CN 200510101148A CN 100425710 C CN100425710 C CN 100425710C
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Abstract
The present invention relates to a high-energy continuous electrical pulse processing method for a steel wire (belt). The method comprises the following steps: driving the steel wire (belt) through an unfolding and folding device to be transferred to the direction of the unfolding and folding device at a certain speed; configuring a high-energy continuous electrical pulse power supply which can be used for continuously outputting a plurality of high-energy electrical pulses and continuously processing a powering zone section of a moving steel wire (belt) inputted by a pair of electrical contactors, and simultaneously cooling the powering zone section of the moving steel wire (belt) through a cooling device. The present invention adopts the current of the high-energy continuous pulses to process the moving steel wire (belt), has the advantages of low energy consumption and high production efficiency, and avoids the phenomenon of surface oxidation of a steel wire (belt) material in the process of common processing. The method greatly improves the plasticity of the steel wire (belt), and simultaneously, the property of high strength of the material can be maintained. Thereby, the excellent combination property can be obtained. The present invention is especially suitable for the continuous processing of a steel wire (comprising pipe, wire, belt) with the diameter not greater than 3mm.
Description
Technical field
The present invention relates to improve simultaneously the technology of steel wire (band) intensity and plasticity, the high-energy continuous electric pulse treating method of particularly a kind of steel wire (band).
Background technology
Steel wire has important use in national economy, be widely used in making wire cloth, system nail, motorway and protect and block and industry such as construction work.The ideal steel wire should have higher intensity and plasticity preferably.And intensity and plasticity are a pair of contradiction in traditional steel wire, if obtain high strength, plasticity will reduce, and the plasticity in order to obtain sometimes just must be sacrificed intensity.The combination of suitable high strength and moderate high-ductility can make material and member obtain very high energy to fracture or work of rupture, thus the performance and the life-span of greatly improving engineering component.Generally need after the steel wire work hardening at present to improve material plasticity by annealing technology, but can make strength degradation bigger simultaneously, and treatment process is many, production efficiency is not high.How to make steel wire obtaining the high-intensity good plasticity that keeps simultaneously with simple technology, be the problem that engineering circle is paid special attention to.Adopt high-energy continuous electric pulse that steel wire (band) is carried out processed continuously technology and do not see that relevant document discloses.
Summary of the invention
The present invention proposes the high-energy continuous electric pulse treating method of a kind of steel wire (band), this method reduces under the less situation in intensity with respect to other treatment process and has improved the plasticity of steel wire (band) greatly, thereby reaches intensity and the plasticity that improves steel wire (band) simultaneously.
The high-energy continuous electric pulse treating method of steel wire of the present invention (band) may further comprise the steps:
By open, wrap-up drives successive steel wire (band) and transmits to described wrap-up direction with certain speed; Dispose a high-energy continuous electric pulse power supply, this power supply is continuously exported a plurality of high energy electric pulses and the electric imposing region of the steel wire (band) by a pair of Electical connector input motion is handled continuously, by forced cooling device the electric imposing region of the steel wire (band) of described motion is forced to cool off simultaneously.
Above-mentioned forced cooling device is arranged at around the electric imposing region of moving steel wire (band), and forced cooling device adopts the oil cooling mode.In the treating processes, the processing parameter of the high energy successive pulse electric current of the electric imposing region of input steel wire (band) is: pulse width 10-200us, frequency 50-3000Hz, 100A/mm
2Amplitude≤the 260A/mm of≤current density
2The processing parameter of preferred high energy successive pulse electric current is: pulse width 20-100us, frequency 50-1000Hz, 200A/mm
2Amplitude≤the 260A/mm of≤current density
2
The present invention has compared following beneficial effect with existing other conventional processing steel wire (band) technology:
1. in the electricimpulse treating processes, produce certain joule heating effect and other non-thermal effect in the steel wire, because the coupling of joule heating effect and non-thermal effect, make former in further sharply increase of vibrational energy, the increasing of climbing of dislocation, help in the material because of the formed subgrain of work hardening rotates, these factors have been impelled the acceleration of recrystallize process.By observing a large amount of microns and the superfine crystal particle of submicron-scale in our steel wire after electricimpulse is handled of microstructure analysis, the superfine crystal particle that obtains behind these recrystallize helps material and improves intensity and plasticity simultaneously.
2. material processing is all carried out in heat-eliminating medium, so has reduced the degree of oxidation of material in the process.Thereby reduced the phenomenon of conventional processing technology because of the oxidation aggravation that elevated temperature brought.
3. compare with other routine techniques, the material after the work hardening is after the process processing of this invention, and plasticity is greatly improved, and can keep the high-intensity characteristic of material simultaneously.
4. the present invention is novel, and the production efficiency height is specially adapted to diameter and is not more than the processing less than the band of 3mm of the steel wire of 3mm or thickness, and the product that is obtained has the excellent intensity and the over-all properties of plasticity.
Description of drawings
Fig. 1 is the embodiment synoptic diagram of the high-energy continuous electric pulse online treatment equipment of steel wire;
Fig. 2 is the metallographic structure (* 1000) of Mild Steel Wire before cold drawn distortion that contains 0.14% carbon;
Fig. 3 is that same drawn wire is through the metallographic structure (* 1000) behind the moderate finite deformation;
Fig. 4 a is the metallographic structure (* 1000) of same drawn wire after high energy electric pulse is handled;
Fig. 4 b is the metallographic structure (* 1000) of same drawn wire after galvanic current is handled.
Embodiment
Fig. 1 is for realizing the high-energy continuous electric pulse online treatment equipment of a kind of steel wire of the present invention (band).It comprises decoiling equipment 5, wrap-up 6, handles the high-energy continuous electric pulse power supply 1 of usefulness, is arranged at forced cooling device 4 and a pair of Electical connector 3,3 ' between decoiling equipment 5 and the wrap-up 6.Successive steel wire (band) 2 by open, wrap-up supports and tensioning, the tension adjustment mechanism that they have guarantees the stability of steel wire (band) moving process, open, the wrap-up energy of rotation drives steel wire (band) 2 and transmits continuously to described wrap-up direction (Fig. 1 direction of arrow) with certain speed, the transmission speed of steel wire (band) can be 0-200m/min, transmission speed is by frequency transformer and torque motor adjustment control (not drawing among the figure), and is adjustable continuously in the 0-200m/min scope.
The positive and negative output terminal of high-energy continuous electric pulse power supply 1 connects two Electical connectors 3,3 ' respectively, make the electric imposing region 2 ' of the steel wire (band) 2 that high energy successive pulse electric current input motion by two Electical connectors 3,3 ', the steel wire of movement continuously (band) needs in the front and back of electric imposing region 2 ' to import by guide deflection sheave 9,9 ' respectively and derive the tension force in the whole timber material movement continuously process that the fine position of guide deflection sheave is adjustable.Electric imposing region 2 ' at moving steel wire (band) 2 is provided with forced cooling device 4 on every side, the electric imposing region 2 ' of steel wire (band) to motion is forced cooling process simultaneously, to guarantee steel wire (band) any surface finish, eliminate steel wire (band) surface oxidation phenomenon.Forced cooling device 4 is the oil cooling device.Refrigerating unit 4 can comprise cooling tank 41, passes to import and outlet that circulating cooling medium 43,42,44 is respectively circulating cooling medium in the cooling tank 41.The type of cooling can be that the electric imposing region 2 ' of steel wire (band) immerses in the heat-eliminating medium.
The peak power output of high-energy continuous electric pulse power supply 1 is 10KW, and output pulse width can be 10-200 μ s, and output pulse frequency is 50-3000Hz.
Two Electical connectors 3,3 ' are two, and to adopt nickel to cover the diameter that the copper layer makes be the conductive casters of 160mm, conductive casters periphery and steel wire (band) contact position is provided for holding the groove of steel wire (band), good to guarantee contact, reduce contact electricity resistance between material and electrode, distance between two conductive casterses is adjustable in the 100-1500mm scope, according to required processing speed adjustment, speed is fast more during use, and the distance between two conductive casterses should extend.The conductive casters diameter determines that according to scantling pending steel wire diameter is more little, and the diameter of conductive casters is also corresponding to diminish.Conductive casters also can adopt the better and attrition resistant materials of electroconductibility such as copper-graphite, dispersion-strengthened Cu or brass to make, also can cover upper and lower electrode briquetting that materials such as nickel dam, copper-graphite or brass make with copper as Electical connector, be provided for holding the groove of steel wire (band) equally in upper and lower electrode briquetting and steel wire (band) contact position, contact well with lead with assurance, reduce contact resistance.
Adopt equipment shown in Figure 1 to realize that the high-energy continuous electric pulse treatment process process of steel wire (band) is as follows:
By shown in Figure 1ly open, wrap-up drives continuous steel wire (band) 2 and transmits to described wrap-up direction with certain speed, the transmission speed of steel wire (band) can be adjusted in the 0-200m/min scope as required continuously.
The electric imposing region 2 ' of the steel wire (band) that the high energy successive pulse electric current of described high-energy continuous electric pulse power supply 1 output by a pair of Electical connector 3,3 ' input motion is handled, and the electric imposing region 2 ' of the steel wire (band) of electric imposing region 2 ' the 4 pairs of described motions of forced cooling device on every side by being arranged at moving steel wire (band) is forced to cool off simultaneously.
The processing parameter of the high energy successive pulse electric current of the electric imposing region of the continuous steel wire (band) of input motion is during processing: pulse width 10-200 μ s, frequency 50-2000Hz, the amplitude 〉=100A/mm of current density
2The processing parameter of preferred high energy successive pulse electric current is: pulse width 10-100 μ s, frequency 50-1000Hz, the amplitude 〉=200A/mm of current density
2
For the steel wire (band) of concrete different size, differing materials, different cold deformations, the principle of the processing parameter of the high energy successive pulse electric current of input is:
1, by surface action formula δ=(π * μ * f/ ρ)
-1/2, wherein μ, ρ, f are respectively magnetic permeability, resistivity, frequency, and δ is the thickness that electric current infiltrates.Be that steel wire diameter is more little, the high energy successive pulse frequency of corresponding input can increase.
2, cold deformation is big more, and the high energy successive pulse width of corresponding input or current density amplitude should improve just can reach treatment effect.
Embodiment: carbon content be 0.14% soft steel after cold drawing, the diameter 0.36mm of silk adopts equipment shown in Figure 1 and high-energy continuous electric pulse treating method of the present invention that this steel wire is handled.Fig. 2 contains the metallographic structure (* 1000) of Mild Steel Wire before cold drawn distortion of 0.14% carbon for this, and it is the tissue after the Full Annealing, as can be observed from Figure crystal grain distribute more even, but with burst process after relatively grain-size is bigger; Fig. 3 for this drawn wire through the metallographic structure (* 1000) after the cold drawn distortion, wherein be difficult to pick out the grain boundary, almost all be the fibrous crystal grain that extends after the cold drawn distortion.
Successive Mild Steel Wire 2 is by opening, wrap-up drives and transmits with speed 3m/min in the direction of arrows, high-energy continuous electric pulse power supply 1 just, negative pole then covers the conductive casters 3 that nickel dam is made from copper respectively, 3 ' (the conductive casters diameter is 160mm, powering up segment distance 250mm) electric imposing region 2 ' that inserts the steel wire of motion handles, the steel wire of movement continuously needs respectively by guide deflection sheave 9 in the front and back of electric imposing region 2 ', 9 ' imports and derives, adopt the electric imposing region 2 ' of 4 pairs of above-mentioned steel wires of oil seal type refrigerating unit to carry out cooling process simultaneously, circulating cooling medium is a conventional quenching oil, pump into chilled oil by import 42, and constantly discharge the oil that heats because for the treatment of processes by exporting 44.The pulse width 60 μ s of the high energy successive pulse electricity of input, frequency is 100Hz, pulse peak current density is 260A/mm
2
Experiment finds that in the drawn wire that high energy electric pulse is handled, (see Fig. 4 a), the superfine crystal particle that obtains behind these recrystallize helps material and improves intensity and plasticity simultaneously to form a large amount of tiny microns and the superfine crystal particle of submicron.Carried out Direct current treatment test contrast simultaneously, the galvanic current density of input is 144A/mm
2, to have handled with a collection of steel wire, this moment, the recrystal grain of steel wire was extremely inhomogeneous, and grain-size is big (seeing Fig. 4 b), and also have very big-difference on mechanical property.Table 1 result shows high energy electric pulse than the Direct current treatment drawn wire, and when the material unit elongation obviously improved, strength degradation was smaller, even this material has obtained the excellent comprehensive mechanical property.
Performance comparison sheet before and after the Mild Steel Wire of table 1 carbon content 0.14% (diameter 0.36mm) is handled
Claims (2)
1, the high-energy continuous electric pulse treating method of a kind of steel wire or steel band is characterized in that may further comprise the steps:
By open, wrap-up drives the successive steel wire or steel band transmits to described wrap-up direction with certain speed;
Dispose a high-energy continuous electric pulse power supply, this power supply is continuously exported a plurality of high energy electric pulses and the steel wire by a pair of Electical connector input motion or the electric imposing region of steel band are handled continuously, by forced cooling device the steel wire of described motion or the electric imposing region of steel band is forced cooling simultaneously;
Wherein, the processing parameter of the high energy successive pulse electric current of the steel wire that input motion during processing or the electric imposing region of steel band is: pulse width 10-200us, frequency 50-3000Hz, 100A/mm
2Amplitude≤the 260A/mm of≤current density
2Described forced cooling device is arranged at around the electric imposing region of the steel wire of motion or steel band, and forced cooling device adopts the oil cooling mode.
2, the high-energy continuous electric pulse treating method of steel wire according to claim 1 or steel band is characterized in that: the processing parameter of described high energy successive pulse electric current is: pulse width 20-100us, frequency 50-1000Hz, 200A/mm
2Amplitude≤the 260A/mm of≤current density
2
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| CN100398674C (en) * | 2006-07-04 | 2008-07-02 | 清华大学深圳研究生院 | Method of implementing on line softening annealing of medium, high carbon steel wire using high energy electric pulse |
| CN102212671B (en) * | 2011-05-23 | 2013-05-29 | 清华大学深圳研究生院 | Method for promoting growth of GOSS textures of silicon steel strips by using pulse current |
| CN102560066B (en) * | 2012-01-29 | 2013-11-06 | 北京科技大学 | Heat treatment method of high-silicon steel plate strip material |
| CN103060543B (en) * | 2013-02-07 | 2014-06-18 | 重庆镪镔实业有限公司 | Cold-rolled ribbed bar high-density electric pulse tempering device and method |
| CN111485095B (en) * | 2020-05-11 | 2021-05-04 | 北京科技大学 | Control method for promoting homogenization treatment of continuous casting slab |
| CN111763813A (en) * | 2020-05-26 | 2020-10-13 | 东南大学 | Production method for treating high-strength high-toughness high-carbon steel wire by electric pulse |
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| CN1618993A (en) * | 2004-12-09 | 2005-05-25 | 清华大学深圳研究生院 | High energy continuous electric pulse on line annealing method of copper wire and its device |
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| CN1618993A (en) * | 2004-12-09 | 2005-05-25 | 清华大学深圳研究生院 | High energy continuous electric pulse on line annealing method of copper wire and its device |
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Granted publication date: 20081015 Termination date: 20181116 |