CN1944692A - High frequency electric pulse continous heat processing method for cold drawing medium and high carbon steel wire - Google Patents
High frequency electric pulse continous heat processing method for cold drawing medium and high carbon steel wire Download PDFInfo
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- CN1944692A CN1944692A CN 200610097294 CN200610097294A CN1944692A CN 1944692 A CN1944692 A CN 1944692A CN 200610097294 CN200610097294 CN 200610097294 CN 200610097294 A CN200610097294 A CN 200610097294A CN 1944692 A CN1944692 A CN 1944692A
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Abstract
The high frequency electric pulse continuous heat treatment method for cold drawn medium and high carbon steel wire includes conveying the steel wire at certain speed with one steel wire unwinding and winding device, and continuously treating the moving steel wire with one high frequency pulse power source and one pair one antiwear electrodes electrically. The high frequency pulse power source has the output parameters including pulse current frequency of 10,000-30,000Hz, output current density of 50-500 A/sq cm and output voltage of 9-24 V. The present invention has the advantages of low cost, clean treatment process, environment friendship, capacity of restoring the plasticity of steel wire, etc, and is especially suitable for treating steel wire of 3 mm below diameter.
Description
Technical field
The present invention relates to a kind of cold drawn middle and high carbon steel wire thermal treatment, particularly relate to the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn.Be applicable to the centre or the finished product thermal treatment of industry cold-drawn wires such as metal products and electric wire.Belong to metal products heat treatment technics field.
Background technology
Production for Steel Wire is the important component part of national economy, and steel wire product is widely used in every profession and trades such as coal, oil, metallurgy, machinery, automobile, building, national defence at present.Production for Steel Wire, in the particularly middle and high carbon steel wire production process, for guaranteeing normally carrying out and reaching desired final performance of drawing process, the mode that extensively adopts patenting to handle is carried out intermediate heat treatment at present, in the hope of obtaining high comprehensive mechanical property and drawing property.But because lead steam and lead dust are to the pollution of environment and to the harm of human body, enhancing along with human environmental consciousness, the heat treatment mode of seeking a kind of economy, cleaning and safety replaces patenting to be handled, become the problem that the metal products field is paid special attention to and urgency is to be solved, simultaneously also can obviously reduce resource consumption, reduce production costs.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of cold-drawn of a kind of economy, cleaning and safety is provided, to replace patenting treatment process commonly used at present.
The object of the present invention is achieved like this: the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn is characterized in that: it be by a steel wire put, take-up makes steel wire transmit to the take-up direction with certain speed; In transmission course, dispose a high frequency direct current pulse power source and moving steel wire is powered up continuous processing by a pair of abrasion resistant electrode.
The scope that powers up continuous treating processes medium-high frequency pulse power output parameter of the present invention is: pulse current frequency is 10000～30000Hz; Outward current density size is 50～500A/cm
2Output voltage is 9～24V.
Abrasion resistant electrode of the present invention is brass, graphite or other electrode, can be to be involuted by two cube electrodes up and down, leaves the hole slot that can hold steel wire in the middle of its involutory surface; Also can be that a cube electrode directly contacts wire type.Rely on mechanical force closely to contact between the upper and lower electrode, between electrode and the steel wire, contact pressure is adjustable continuously, guarantees that steel wire can pass through smoothly in adding electric process, and contacts well with electrode, not sparking is to reduce steel wire and interelectrode contact resistance and to guarantee steel wire surface quality.
The present invention has following beneficial effect:
1, in the high frequency electric pulse treating processes, the steel wire joule heating effect is apparent in view, and the steel wire heat-up rate is fast, and electricimpulse can also produce other non-thermal effect in addition.Under these two kinds of effect actings in conjunction, the vibration of atoms metal aggravation promotes dislocation motion and dislocation to reconfigure, and comprises that it is typical subgrain that the formation of the offseting of unlike dislocation, polygonization and distortion born of the same parents shape are pressed structural transformation, impels recrystallization process to quicken.By microstructure analysis, in the processed continuously cold-drawn wire of high frequency electric pulse, find the close grain of a large amount of microns and submicron, these close grains help improving the intensity and the plasticity of material.
2, it is short that high frequency electric pulse is handled the used time of steel wire continuously, only needs 5～15s, reduced the degree of oxidation of workpiece surface, and oxide skin is few, has improved steel wire surface quality.
3, the high-frequency electrical pulses source power is lower than 10KW, and energy consumption is low, and high efficiency is particularly suitable for the continuous processing that diameter is not more than the 3mm steel wire.
4, the steel wire properties after high frequency electric pulse is handled continuously near or reach level after patenting is handled, can replace patenting technology to a certain extent, thereby thoroughly eradicate the Lead contamination that is produced in the Production for Steel Wire process, the feature of environmental protection is good, and effectively reduces the cost of Production for Steel Wire.
5, processing speed can be adjusted according to steel wire diameter size, movement velocity and pulse-repetition, electric current and voltage swing.
6, the treatment unit that this method adopted has compact construction, floor space is little, easy to operate, high efficiency, characteristics such as energy consumption is low, the feature of environmental protection is good, and the steel wire after the processing still can keep enough high strength when plasticity obtains very big degree and recovers.Be applicable to the centre or the finished product thermal treatment of cold-drawn wire,, be specially adapted to the continuous processing of diameter less than the 3mm steel wire to replace lead bath isothermal processes (being commonly called as patenting) technology.
Description of drawings
Fig. 1 is the high frequency electric pulse apparatus for continous treatment synoptic diagram of the cold-drawn wire of the present invention's employing.
The electrode device synoptic diagram that Fig. 2 adopts for the present invention.
Fig. 3 is the metallographic structure (* 500) of 0.70% high-carbon cold-drawn wire for carbon content.
Fig. 4 is the metallographic structure (* 500) of same cold-drawn wire after high frequency electric pulse is handled.Fig. 5 is the metallographic structure (* 500) of same cold-drawn wire after lead bath is handled.
Among the figure: high frequency pulse power supply 1, steel wire 2, electrode 3,3 ', actinobacillus device 4, take-up 5, wear resistant brass piece 6, hard rubber sheet 7, screw rod 8, spring 9, nut 10, cable 11.
Embodiment
Fig. 1 is the high frequency electric pulse apparatus for continous heat treatment synoptic diagram of the middle and high carbon steel wire of cold-drawn of the present invention.It mainly by high frequency pulse power supply 1, actinobacillus device 4, take-up 5 and a pair of wear resistant brass electrode 3,3 '.To the transmission of take-up 5 directions, the steel wire movement velocity is 0～20m/s to steel wire 2 under take-up 5 drives, and movement velocity is adjusted by the frequency transformer of take-up.High frequency pulse power supply 1 powers up continuous processing by the moving steel wire of a pair of wear resistant brass electrode pair, two interelectrode distances are adjustable in 20～100cm scope, and the scope of high frequency pulse power supply output parameter is: pulse current frequency is 10000～30000Hz; Outward current density size is 50～500A/cm
2Output voltage is 9～24V.
Fig. 2 is the electrode device synoptic diagram that the present invention adopts.Among the figure, wear resistant brass electrode 3 is to be involuted up and down by two wear resistant brass pieces 6, leave the hole slot that can hold steel wire in the middle of its involutory junction surface, compress with hard rubber sheet 7, screw rod 8, spring 9 and nut 10 between the upper and lower brass ingot 6, snap-in force is regulated by telescopic spring, guarantees that steel wire can pass through hole slot smoothly in adding electric process, and contact well with hole slot, not sparking, to reduce steel wire and interelectrode contact resistance, hard rubber sheet makes and keeps insulation between electrode and the screw rod simultaneously.Wear resistant brass piece 6 also can substitute with wear-resisting graphite.
Embodiment 1:
The starting material that this experiment is adopted are that diameter 1.5mm, carbon content are 0.70% cold-drawn high-carbon steel wire, and this steel wire is cold drawn to diameter 1.5mm from diameter 6.5mm wire rod, and the tensile strength after steel wire is cold drawn is 1980～2024MPa, unit elongation 1%.Control steel wire movement velocity makes the electricimpulse continuous processing time respectively at 0～8s, and the high frequency pulse power supply parameter of input is: frequency 20000Hz, pulse current density 80A/cm
2, pulsed voltage 12V.Experimental result is as shown in table 1, and table 1 is the result show, selects suitable processing parameter, can make after the high-frequency electrical pulses burst process steel wire properties near or reach level after patenting is handled.
Performance before and after table 1 cold-drawn wire electricimpulse is handled relatively
| The electricimpulse treatment time (s) | Tensile strength (MPa) | Unit elongation (%) |
| 0 | 1980～2024 | 1 |
| 3 | 1680～1740 | 3 |
| 5 | 1324～1358 | 4 |
| 6 | 1240～1260 | 5 |
| 7 | 1055-1129 | 7 |
| 10 | 900～940 | 11 |
| Lead bath quenching | 1127-1225 | ≥5 |
Fig. 3 is the metallographic structure of cold-drawn wire, almost all is the fibrous tissue of elongation.In the steel wire after high frequency electric pulse is handled, a large amount of tiny microns and the superfine crystal particle of submicron order have been formed, as shown in Figure 4.These superfine crystal particles be formed with the raising that is beneficial to material plasticity, can keep sufficiently high intensity simultaneously.Fig. 5 is the metallographic structure after the lead bath quenching, and its crystal grain is greater than the steel wire crystal grain after the burst process.
Steel wire after 7s handles is carried out drawing experiment, is 50% at total draught, and Reduction per draft is that the tensile strength of steel wire reaches 1700～1760MPa, reaches the requirement of common rope making wire under 17% the situation.As seen the present invention can replace patenting technology to a certain extent, thereby eliminates the harm of Lead contamination, and effectively reduces the cost of Production for Steel Wire, is the drawn wire intermediate heat treatment technology of a kind of economy, cleaning, safety.
Embodiment 2
The starting material that this experiment is adopted are that diameter 2.0mm, carbon content are 0.45% cold-drawn bullet wire, and this steel wire is cold drawn to diameter 2.0mm from diameter 5.5mm wire rod, and the tensile strength after steel wire is cold drawn is 1560～1600MPa, unit elongation 2%.The high frequency pulse power supply parameter of input is: frequency 20000Hz, pulsed current 120A/cm
2, pulsed voltage 9V, the electricimpulse treatment time is 6s.Tensile strength of wire after the processing is 912～950MPa, and unit elongation is 12%, and the tensile strength of wire 882～980MPa after the same material patenting, unit elongation is greater than 7%.Illustrate that the present invention also can be used for the intermediate heat treatment of cold-drawn bullet wire, the mechanical properties of wires after the processing also reaches the level of lead bath quenching.
Claims (8)
1, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn is characterized in that: it be by a steel wire put, take-up makes steel wire transmit to the take-up direction with certain speed; In transmission course, dispose a high frequency direct current pulse power source and moving steel wire is powered up continuous processing by a pair of abrasion resistant electrode.
2, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn according to claim 1 is characterized in that: the described scope that powers up continuous treating processes medium-high frequency pulse power output parameter is: pulse current frequency is 10000～30000Hz; Outward current density size is 50～500A/cm
2Output voltage is 9～24V.
3, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn according to claim 1 and 2 is characterized in that: described abrasion resistant electrode is to be involuted by two cube electrodes up and down, leaves the hole slot that can hold steel wire in the middle of its involutory surface.
4, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn according to claim 3 is characterized in that: compress with hard rubber sheet, screw rod, spring and nut between two cube electrodes about described.
5, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn according to claim 1 and 2 is characterized in that: described abrasion resistant electrode is that a cube electrode directly contacts wire type.
6, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn according to claim 1 and 2 is characterized in that: described abrasion resistant electrode is brass, Graphite Electrodes.
7, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn according to claim 3 is characterized in that: described abrasion resistant electrode is brass, Graphite Electrodes.
8, the middle and high carbon steel wire high frequency electric pulse continous heat processing method of a kind of cold-drawn according to claim 4 is characterized in that: described abrasion resistant electrode is brass, Graphite Electrodes.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298653B (en) * | 2008-05-26 | 2011-02-09 | 清华大学深圳研究生院 | High-strength high-toughness AZ91 magnesium alloy strip eletrotoughening process method and system |
| CN102212671A (en) * | 2011-05-23 | 2011-10-12 | 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 |
| CN102489533A (en) * | 2011-12-04 | 2012-06-13 | 西北有色金属研究院 | Electroplastic drawing device of MgB2 wire and drawing method thereof |
| CN103060543A (en) * | 2013-02-07 | 2013-04-24 | 重庆镪镔实业有限公司 | Cold-rolled ribbed bar high-density electric pulse tempering device and method |
| CN103894522A (en) * | 2014-04-11 | 2014-07-02 | 广州市联柔机械设备有限公司 | Spring steel wire heating, winding and cooling conveying device |
| CN105779753A (en) * | 2016-05-12 | 2016-07-20 | 北京科技大学 | Device for realizing aging of hard wire coiled rod by applying pulse current and treatment method |
| 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 |
| WO2021098451A1 (en) * | 2019-11-19 | 2021-05-27 | 江苏中天科技股份有限公司 | Preparation method for coated alloy wire |
| CN113151665A (en) * | 2021-03-17 | 2021-07-23 | 江苏大学 | Electroplastic and laser shock composite strengthening method and device for large workpiece |
| CN113186374A (en) * | 2021-04-30 | 2021-07-30 | 华中科技大学 | High-temperature adjacent metal heat treatment device and method |
| CN113444871A (en) * | 2021-07-21 | 2021-09-28 | 山西阳煤化工机械（集团）有限公司 | Method for regulating and controlling strengthening and toughening of ferritic stainless steel based on high-frequency pulse current |
| CN114231719A (en) * | 2021-12-14 | 2022-03-25 | 北京科技大学 | Electric pulse treatment method for improving strength of high-carbon steel hot-rolled wire |
| CN115305317A (en) * | 2022-07-11 | 2022-11-08 | 北京科技大学 | Electric pulse treatment method for improving strong plasticity of cold-drawn high-carbon steel wire |
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2006
- 2006-10-24 CN CN 200610097294 patent/CN1944692A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298653B (en) * | 2008-05-26 | 2011-02-09 | 清华大学深圳研究生院 | High-strength high-toughness AZ91 magnesium alloy strip eletrotoughening process method and system |
| CN102212671A (en) * | 2011-05-23 | 2011-10-12 | 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 |
| CN102489533A (en) * | 2011-12-04 | 2012-06-13 | 西北有色金属研究院 | Electroplastic drawing device of MgB2 wire and drawing method thereof |
| CN103060543A (en) * | 2013-02-07 | 2013-04-24 | 重庆镪镔实业有限公司 | Cold-rolled ribbed bar high-density electric pulse tempering device and method |
| 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 |
| CN103894522B (en) * | 2014-04-11 | 2016-08-17 | 广州市联柔机械设备有限公司 | Spring steel wire heating coiling and cooling transport device |
| CN103894522A (en) * | 2014-04-11 | 2014-07-02 | 广州市联柔机械设备有限公司 | Spring steel wire heating, winding and cooling conveying device |
| CN105779753B (en) * | 2016-05-12 | 2018-05-04 | 北京科技大学 | One kind realizes Wire Rod ageing device and processing method using pulse current |
| CN105779753A (en) * | 2016-05-12 | 2016-07-20 | 北京科技大学 | Device for realizing aging of hard wire coiled rod by applying pulse current and treatment method |
| WO2021098451A1 (en) * | 2019-11-19 | 2021-05-27 | 江苏中天科技股份有限公司 | Preparation method for coated alloy wire |
| 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 |
| CN113151665A (en) * | 2021-03-17 | 2021-07-23 | 江苏大学 | Electroplastic and laser shock composite strengthening method and device for large workpiece |
| CN113186374A (en) * | 2021-04-30 | 2021-07-30 | 华中科技大学 | High-temperature adjacent metal heat treatment device and method |
| CN113444871A (en) * | 2021-07-21 | 2021-09-28 | 山西阳煤化工机械（集团）有限公司 | Method for regulating and controlling strengthening and toughening of ferritic stainless steel based on high-frequency pulse current |
| CN114231719A (en) * | 2021-12-14 | 2022-03-25 | 北京科技大学 | Electric pulse treatment method for improving strength of high-carbon steel hot-rolled wire |
| CN115305317A (en) * | 2022-07-11 | 2022-11-08 | 北京科技大学 | Electric pulse treatment method for improving strong plasticity of cold-drawn high-carbon steel wire |
| CN115305317B (en) * | 2022-07-11 | 2023-10-13 | 北京科技大学 | Electric pulse treatment method for improving plasticity of cold drawn high carbon steel wire |
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