CN204589277U - A kind of on-lining soften annealing system of industrially pure titanium band - Google Patents
A kind of on-lining soften annealing system of industrially pure titanium band Download PDFInfo
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- CN204589277U CN204589277U CN201520257939.6U CN201520257939U CN204589277U CN 204589277 U CN204589277 U CN 204589277U CN 201520257939 U CN201520257939 U CN 201520257939U CN 204589277 U CN204589277 U CN 204589277U
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Abstract
A kind of on-lining soften annealing system of industrially pure titanium band, it comprises milling train and high energy pulse power supply, this milling train comprises: roll, decoiling equipment, wrap-up, correspondence is arranged on the first supporting roll between decoiling equipment and roll and between roll and wrap-up and the second supporting roll, arranges two Electical connectors between described roll and the first supporting roll; Industrially pure titanium band can be moved towards wrap-up by the decoiling equipment of milling train, wrap-up and supporting roll tensioning, this industrially pure titanium band and the tight Elastic Contact of described roll, and with described two Electical connector electrical contacts; High energy pulse power supply positive-negative output end correspondence connects described two Electical connectors, and for providing, 60-760Hz, 10-600V, pulse width are 10-6000 μ s, current density amplitude is 200A/mm
2-6000A/mm
2high energy pulse electric current.It significantly can improve the comprehensive mechanical property of material, can on-line continuous produce.
Description
Technical field
The utility model relates to industrially pure titanium band softening annealing treatment system, more particularly, is a kind of high energy electric pulse on-lining soften annealing system of industrially pure titanium band.
Background technology
Along with global energy dilemma and problem of environmental pollution are on the rise; in order to reduce the environmental pollution that energy consumption causes with minimizing flexible mechanical exhaust emissions; in the field such as Aeronautics and Astronautics and automobile; structure lightened brought benefit is very remarkable; comprise the maneuvering ability that can improve aircraft and Motor vehicles; reduce oil consumption, reduce the transport requirement of instrument and the expense of transport.Automobile, business (army) are with the large and wide vehicles of the aircraft amount of being, the improvement that material structure is small, will produce significant economic benefit.Traditional structured material (iron and steel, aluminium etc.) faces energy-conservation, consumption reduction, reduces discharging and the severe situation of environmental protection in national economy.In this case, application and exploitation lightweight structural material industrially pure titanium, become the focus and emphasis of research and development both at home and abroad in recent years.
Industrially pure titanium is a kind of important lightweight structural material, especially industrially pure titanium has that density is low, intensity is high, erosion resistance is strong, can weld, middle warm nature can be good and without advantages such as magnetic, makes it to have a wide range of applications in Aeronautics and Astronautics, ships, weapons, nuclear energy, Transportation Industry, military affairs and the field such as electronics, information industry.Therefore the pure titanium of metal industry is described as " 21 century most important green engineering material ".
In recent years, TA2 industrially pure titanium obtains development at full speed as one of most important industrially pure titanium and applies widely, but TA2 industrially pure titanium is shaped, rear resilience is very large, and size control is very difficult, has a significant impact the precision of forming dimension.In addition, during the cold shaping of industrially pure titanium sheet material, sclerosis is more seriously wanted, and frictional coefficient is large, strong with the avidity of other metal, easy sticking to mould, scuffing in shaping, punching performance is poor, Strip Shape Control is difficult, therefore greatly limit the further application of distortion industrially pure titanium.If carry out suitable distortion and subsequent heat treatment (as incomplete or Full Annealing) to TA2 industrially pure titanium, its comprehensive mechanical property can be increased substantially, solve the bad plate shape problems such as warpage well, the TA2 industrially pure titanium that thus this comprehensive mechanical property is excellent should have market application foreground and more wide development space widely.
General alpha single-phase TA2 industrially pure titanium (as cold rolling, cold drawing etc.) tissue after cold working is made up of the original thick Deformation structure elongating along deformation direction or shorten, and contains the deformation distortional strain energy of uneven distribution at intracrystalline and crystal boundary.Grain-size and distortion degree relevant with factors such as concrete material composition, thermal treatment (processing) technique, process for cooling and heat-eliminating mediums.Studies have reported that, material transition can be made after the thermal distortion of TA2 industrially pure titanium to be with the alpha of deformation elongation for matrix, and residual a small amount of beta phase even dispersion is distributed in crystal boundary and intracrystalline simultaneously, thus improves its intensity and toughness.However, TA2 industrially pure titanium is after above-mentioned process, and still have the shaft-like α phase such as thick in a large number, organization internal contains highdensity distortional strain energy simultaneously.Have the TA2 industrially pure titanium of this tissue at deformation after unloading or in the process of bearing external load, easily stress concentration is produced at the α-Ti of thick distortion elongation and the grain boundaries containing high distortional strain energy, form formation of crack and crack, the inefficacy making material too early and be unfavorable for subsequent forming, therefore the quantity of the non-distortion crystal grain of interior tissue, distribution and shape characteristic have had a strong impact on the mechanical property of TA2 industrially pure titanium.
Clearly, if toughness and its follow-up forming ability of TA2 industrially pure titanium will be improved on this basis further, only be improved the future development that the distribution of wherein non-distortion equi-axed crystal and pattern make it towards being conducive to its toughness and improving, to improving the comprehensive mechanical property of material.And traditional Full Annealing thermal treatment process can improve the plasticity of TA2 industrially pure titanium to a certain extent, but because the velocity of diffusion in solid phase of solute atoms in industrially pure titanium is very slow, there is Heating temperature high (more than 650 DEG C) in the Full Annealing treatment process of the pure titanium of general industry, soaking time is long (depending on the size of batch in stove, general a few hours) and the problem such as energy consumption is large, because Heating temperature is high, soaking time is long, the surface of industrially pure titanium is easy to oxidation, particularly industrially pure titanium plate, once there is partial surface oxidation phenomenon in band, subsequent disposal is difficult to remove zone of oxidation, have a strong impact on the quality of subsequent forming operation and the finished product, simultaneously under long-time high-temperature condition, easily there is abnormal grain growth in TA2 industrially pure titanium, directly causes material internal grain-size seriously uneven, the grievous injury final mechanical property of material.Moreover, also strict must control the techniques such as the type of heating of industrially pure titanium and rate of heating, in case once type of heating and heat-up rate select improper, material internal temperature inequality, local burning will be produced, finally cause the consequence of the uneven and mechanical property instability of material inside organization after solution treatment, so the factor affecting prior heat treatment process is complicated, production cost is high.Therefore how to overcome industrially pure titanium tradition not exclusively and the deficiency of Full Annealing thermal treatment process, study a kind of there is the TA2 industrially pure titanium of favorable comprehensive mechanical property novel softening annealing treatment process and system just seem particularly important.
Utility model content
The purpose of this utility model is to provide a kind of on-lining soften annealing system of industrially pure titanium band, to solve above-mentioned technical problem that is incomplete by tradition and the existence of Full Annealing treatment process process industrially pure titanium band.
Concrete technical scheme of the present utility model is as follows:
An on-lining soften annealing system for industrially pure titanium band, it comprises:
Milling train, this milling train comprises: roll, the decoiling equipment of roll input side, the wrap-up of roll outgoing side, and correspondence is arranged on the first supporting roll between decoiling equipment and roll and between roll and wrap-up and the second supporting roll, arranges two Electical connectors between described roll and the first supporting roll;
Industrially pure titanium band, can be moved towards wrap-up by the decoiling equipment of milling train, wrap-up and supporting roll tensioning, this industrially pure titanium band and the tight Elastic Contact of described roll, and with described two Electical connector electrical contacts; And
High energy pulse power supply, its positive-negative output end correspondence connects described two Electical connectors, and for providing to the industrially pure titanium band between described two Electical connectors, frequency is 60-760Hz, voltage is 10-600V, pulse width is 10-6000 μ s, the amplitude of current density is 200A/mm
2-6000A/mm
2high energy pulse electric current.
After making the process of industrially pure titanium band, obtain part isometry tissue, preferably, the output parameter of described high energy pulse power supply comprises: frequency 60-460Hz, voltage 10-600V, pulse width 10-6000 μ s.More preferably, the output parameter of described high energy pulse power supply comprises: frequency 360Hz, voltage 20V, pulse width 80 μ s.
After making the process of industrially pure titanium band, obtain complete isometry tissue, preferably, the output parameter of described high energy pulse power supply comprises: frequency 420-760Hz, voltage 10-600V, pulse width 10-6000 μ s.More preferably, the output parameter of described high energy pulse power supply comprises: frequency 670Hz, voltage 20V, pulse width 80 μ s.
In the on-lining soften annealing system of above-mentioned industrially pure titanium band, preferably, the distance between described two Electical connectors is 10-1800mm.Described two Electical connectors preferably described first supporting roll and roll, under this scheme, described first supporting roll is preferably made up of two conductive casterses, and the wheel face of conductive casters is in the form of slot, and conductive casters and the industrially pure titanium band on it form certain cornerite.
In the on-lining soften annealing system of above-mentioned industrially pure titanium band, preferably, this on-lining soften annealing system also comprises:
Current sampling device and amperometry system, this current sampling device is connected to the output loop of described high energy pulse power supply, and this amperometry system is connected with this current sampling device; And/or
Timing device, this timing device is connected to the output loop of described high energy pulse power supply; And/or
Temperature measuring equipment and inventory analysis device, for measuring and analyze the temperature of the industrially pure titanium band between two Electical connectors.
In the on-lining soften annealing system of above-mentioned industrially pure titanium band, preferably, this on-lining soften annealing system does not have extra refrigerating unit.
Compared with prior art, the on-lining soften annealing system of this industrially pure titanium band has the following advantages:
1, effectively can improve the microstructure of industrially pure titanium band, thus increase substantially the comprehensive mechanical property of material.Specifically, with in above-mentioned on-lining soften annealing system treating processes, high energy pulse electric current was directly inputted in titanium material and produced important joule heating effect and non-thermal effect moment, and under the coupling of heat effect and non-thermal effect, the vibrational energy of atom is sharply increased, simultaneously this moment high-octane pulsed current input greatly facilitate the diffusion of material internal atom.In addition, TA2 industrially pure titanium band through the amount of appropriately pressing down cold roller and deformed after material internal occurred that a large amount of thick deformation is elongated, broken tissue, crystal boundary is distortion bending in distortion, thicken unclear, there is a large amount of distortional strain energies in organization internal simultaneously, therefore there will be sheet resistance for microarea rate in titanium material inside uneven, once moment high energy electric pulse input can cause micro-area temperature gradient, as because of at the uneven grain boundaries of distortion, resistivity on crystal boundary is large and cause this place's temperature high, thus increase solid solubility and the solute atoms diffusibility of Titanium base regional area, accelerate Recrystallization nucleation, the process of growing up, thus realize the process of part and perfect recrystallization and improve pattern and the distribution of crystal grain.Pass through microstructure analysis, we find that the microstructure of TA2 industrially pure titanium band inside after suitable electric pulse parameter process thick uneven becomes along rolling the deformed microstructure of elongating to distortion the partial, re-crystallization equiaxed structure that the thick deformed microstructure that remained by axle new crystal grain simultaneous parts such as equally distributed undistorted tiny α-Ti formed by original, achieve the process of partial, re-crystallization isometry, and grain-size reduces, crystal boundary is neatly clear simultaneously.If increase electric pulse parameter further, we find a large amount of α-Ti in opposite directions β-Ti change, define based on the perfect recrystallization equiaxed structure of tiny distortionless equi-axed crystal, achieve the effect of perfect recrystallization isometry process, now grain-size significantly reduces, and interior tissue is substantially without micro-distortion simultaneously.Therefore, effectively improved the microstructure of TA2 industrially pure titanium by above-mentioned high energy electric pulse on-lining soften annealing system, thus increased substantially the comprehensive mechanical property of material;
2, adopt above-mentioned on-lining soften annealing system that industrially pure titanium band room temperature unit elongation can be made obviously significantly to improve, reach more than 1.65 times of the TA2 industrially pure titanium band unit elongation of prior heat treatment process, and strength degradation amplitude is less;
3, can not there is oxidative phenomena in strip surface.Said system is adopted to carry out in high energy electric pulse on-lining soften treating processes, the time that on TA2 industrially pure titanium band, any point processes completely is within 16 seconds, and process top temperature is 250 DEG C-480 DEG C, well below prior heat treatment process temperature 650 DEG C, thus low temperature and in the short period of time TA2 industrially pure titanium band can not there is oxidative phenomena;
4, production efficiency is high, can realize on-line continuous and produce, and can be widely used in the thermal treatment complete softening annealing process of the incomplete sum of industrially pure titanium band of softening can improving the comprehensive mechanical property of material.
Accompanying drawing explanation
Fig. 1 is the structural representation of some embodiments of industrially pure titanium band on-lining soften annealing system of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1, in some embodiments, the on-lining soften annealing system of industrially pure titanium band comprises: milling train, industrially pure titanium band 7, high energy pulse power supply 4.
Milling train comprises: the first supporting roll 1, roll 2, the second supporting roll 3, decoiling equipment 5, wrap-up 6.Decoiling equipment 5 is positioned at the input side of roll 2, and wrap-up 6 is positioned at the outgoing side of roll 2.First supporting roll 1 and the second supporting roll 3 correspondence are arranged between decoiling equipment 5 and roll 2 and between roll 2 and wrap-up 6, for supporting industrially pure titanium band.First supporting roll 1 and roll 2 are simultaneously also as Electical connector, and roll 2 and the first supporting roll 1 all insulate with the frame of milling train.
Industrially pure titanium band 7 can be moved towards wrap-up 6 by the decoiling equipment 5 of milling train, wrap-up 6 and supporting roll tensioning, this industrially pure titanium band 7 and described roll 2 closely Elastic Contact, and with described two Electical connectors (i.e. the first supporting roll 1 and roll 2) electrical contact.Hereinafter the industrially pure titanium band between two Electical connectors is called electric imposing region 7 ' by some places.
The positive-negative output end correspondence of high energy pulse power supply 4 connects the first supporting roll 1 and roll 2 (i.e. two Electical connectors), and for providing to the industrially pure titanium band between the first supporting roll 1 and roll 2, frequency is 60-760Hz, voltage is 10-600V, pulse width is 10-6000 μ s, the amplitude of current density is 200A/mm
2-6000A/mm
2high energy pulse electric current.The power of high energy pulse power supply 4 can be 5-80KW.
During process, the roll 2 of rotation drives industrially pure titanium band 7 to transmit to wrap-up 6 direction with certain speed by frictional force; First supporting roll 1 and roll 2 are connected the positive and negative output terminal of high energy pulse power supply 4 respectively, high energy pulse electric current is input to the industrially pure titanium band (i.e. the electric imposing region 7 ' of industrially pure titanium band) of the motion between the first supporting roll 1 and roll 2 by high energy pulse power supply 4 by this first supporting roll 1 and roll 2, high energy pulse electric current produces joule heating effect and non-thermal effect at the electric imposing region 7 ' of industrially pure titanium band, carries out high energy electric pulse on-lining soften anneal to this electric imposing region.Industrially pure titanium band naturally cooling in air at room temperature after process, through the second supporting roll 3 by wrap-up 6 rolling, forces cooling without the need to importing any extra heat-eliminating medium.
Wherein, Elastic Contact is closely necessary between roll 2 and industrially pure titanium band 7, roll 2 does not produce obvious viscous deformation to industrially pure titanium band 7, and the movement velocity of industrially pure titanium band 7 is 0.6-160mpm, and this speed adjusts by the velocity of rotation of roll 2.And the velocity of rotation of roll 2 controls (not shown in FIG.) by the frequency transformer and motor adjustment controlling roll rotation.
First supporting roll 1 adopts the conductive casters that the diameter made of copper-graphite is 140-160mm, width is about roll 2 width to form by a pair.The wheel face of conductive casters is designed to channel-shaped, and like this in rolling processing, conductive casters and the industrially pure titanium band on it form certain cornerite, can ensure that contact is good, reduce contact resistance.Distance (distances namely between two Electical connectors) between the mid point of the two conductive casters lines of centres and the mid point of roll 2 line of centres can adjust within the scope of 10-1800mm, this distance can do suitable adjustment according to the speed of rotation of the sectional dimension of industrially pure titanium band 7, state and roll 2, sectional dimension as industrially pure titanium band 7 is larger, the speed of rotation of roll 2 is larger, then this is apart from corresponding lengthening, and vice versa.Conductive casters also can adopt the better and wear-resisting material of the electroconductibility such as dispersion-strengthened Cu or brass to make.
Further comprise in the on-lining soften annealing system of above-mentioned industrially pure titanium band: current sampling device 8, timing device 9, temperature measuring equipment 10, temperature inventory analysis device 11 and amperometry system 12.This current sampling device 8 is connected to the output loop of described high energy pulse power supply 4, and this timing device 9 is connected to the output loop of described high energy pulse power supply 4.This temperature measuring equipment 10 and temperature inventory analysis device 11 power up the temperature of section 7 ' for measurement and the pure titanium band 7 of storage industry.Amperometry system 12 is connected with current sampling device 8, for analyzing the electric current sampled.
In the on-lining soften annealing system of above-mentioned industrially pure titanium band, when roll 2 drives industrially pure titanium band to transmit to wrap-up 6 direction, the high energy pulse electric current exported by high energy pulse power supply 4 by the first supporting roll 1 and roll 2 is input to the electric imposing region 7 ' of the industrially pure titanium band of motion, high energy electric pulse on-lining soften anneal is carried out to it, treating processes is in the air of room temperature, cools material without the need to any extra heat-eliminating medium.The temperature of carrying out high energy electric pulse on-lining soften anneal to this area segments at industrially pure titanium band electric imposing region input high energy pulse electric current is 250 DEG C-480 DEG C.The electric imposing region length of described industrially pure titanium band is 10-1800mm.
Experiment:
Industrially pure titanium band be the amount of appropriately pressing down cold roller and deformed after TA2 industrially pure titanium band, thickness is 1.0mm, width is 6.0mm, with above-mentioned on-lining soften annealing system, this titanium band is carried out high energy electric pulse on-lining soften anneal, and compares with prior heat treatment.
Processing mode 1: Web Transporting speed is 6mpm, the distance between two Electical connectors is 360mm.High energy pulse current parameters is: frequency 360Hz, voltage 20V, pulse width 80 μ s, the amplitude 680A/mm of current density
2.The microstructure of the industrially pure titanium band after on-lining soften anneal is the partial, re-crystallization equiaxed structure that the thick deformed microstructure remained by axle new crystal grain simultaneous parts such as equally distributed undistorted tiny α-Ti is formed, and strip surface non-oxidation phenomenon.
Processing mode 2: Web Transporting speed is 6mpm, the distance between two Electical connectors is 360mm.High energy pulse current parameters is: frequency 670Hz, voltage 20V, pulse width 80 μ s, the amplitude 3600A/mm of current density
2.The microstructure of the industrially pure titanium band after on-lining soften anneal is based on the perfect recrystallization equiaxed structure of tiny distortionless equi-axed crystal, and strip surface non-oxidation phenomenon.
Prior heat treatment parameter: Heating temperature is 650 DEG C, soaking time is 1 hour, and heat-up rate is 15 DEG C/min.
Above-mentioned TA2 industrially pure titanium band through the forward and backward mechanical property tests data of different process process as table 1.
The mechanical property of industrially pure titanium band under the different outer reason processing condition of table 1
Experiment finds, after high energy electric pulse on-lining soften anneal, TA2 industrially pure titanium band is inner becomes partial, re-crystallization tissue or perfect recrystallization tissue by original along the thick Deformation structure of rolling to elongating, distortionlessly in the process tinyly wait axle newly grain formation and along with the minimizing of deformed microstructure and disappearance, average grain size diminishes gradually, is finally fully formed the complete equiaxed structure that even grain size is tiny.Though and the TA2 industrially pure titanium band inside after prior heat treatment process completes recrystallize isometry process, matrix grain generation abnormal growth substantially, grain-size is very uneven.The Experiments of Machanics data sheet of table 1 understands compared with untreated front cold reduced work hardened state TA2 industrially pure titanium band, and the unit elongation of the industrially pure titanium band that prior heat treatment process obtains is improved to some extent, but tensile strength obviously declines; And the unit elongation of the partial, re-crystallization isometry tissue obtained after high energy electric pulse on-lining soften anneal increases substantially, tensile strength fall is very little simultaneously; The unit elongation increase rate of the perfect recrystallization isometry tissue obtained after high energy electric pulse on-lining soften anneal is maximum, but tensile strength declines a little; Therefore, the TA2 industrially pure titanium band obtained through high energy electric pulse on-lining soften anneal is a kind of industrially pure titanium material with favorable comprehensive mechanical property.
Below in conjunction with specific embodiments the utility model has been done and compared detailed description; but these specific descriptions should not be construed as the restriction to the utility model protection domain, those skilled in the art can also make other modification according to explanation of the present utility model or be equal to replacement etc.Protection domain of the present utility model is as the criterion with claims.
Claims (10)
1. an on-lining soften annealing system for industrially pure titanium band, is characterized in that comprising:
Milling train, this milling train comprises: roll, the decoiling equipment of roll input side, the wrap-up of roll outgoing side, and correspondence is arranged on the first supporting roll between decoiling equipment and roll and between roll and wrap-up and the second supporting roll, arranges two Electical connectors between described roll and the first supporting roll;
Industrially pure titanium band, can be moved towards wrap-up by the decoiling equipment of milling train, wrap-up and supporting roll tensioning, this industrially pure titanium band and the tight Elastic Contact of described roll, and with described two Electical connector electrical contacts; And
High energy pulse power supply, its positive-negative output end correspondence connects described two Electical connectors, and for providing to the industrially pure titanium band between described two Electical connectors, frequency is 60-760Hz, voltage is 10-600V, pulse width is 10-6000 μ s, the amplitude of current density is 200A/mm
2-6000A/mm
2high energy pulse electric current.
2. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 1, is characterized in that: the output parameter of described high energy pulse power supply comprises: frequency 60-460Hz, voltage 10-600V, pulse width 10-6000 μ s.
3. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 2, is characterized in that: the output parameter of described high energy pulse power supply comprises: frequency 360Hz, voltage 20V, pulse width 80 μ s.
4. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 1, is characterized in that: the output parameter of described high energy pulse power supply comprises: frequency 420-760Hz, voltage 10-600V, pulse width 10-6000 μ s.
5. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 4, is characterized in that: the output parameter of described high energy pulse power supply comprises: frequency 670Hz, voltage 20V, pulse width 80 μ s.
6. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 1, is characterized in that: the distance between described two Electical connectors is 10-1800mm.
7. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 1, is characterized in that: described two Electical connectors are described first supporting roll and roll.
8. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 7, it is characterized in that: described first supporting roll is made up of two conductive casterses, and the wheel face of conductive casters is in the form of slot, conductive casters and the industrially pure titanium band on it form certain cornerite.
9. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 1, is characterized in that: this on-lining soften annealing system also comprises:
Current sampling device and amperometry system, this current sampling device is connected to the output loop of described high energy pulse power supply, and this amperometry system is connected with this current sampling device; And/or
Timing device, this timing device is connected to the output loop of described high energy pulse power supply; And/or
Temperature measuring equipment and inventory analysis device, for measuring and analyze the temperature of the industrially pure titanium band between two Electical connectors.
10. the on-lining soften annealing system of industrially pure titanium band as claimed in claim 1, is characterized in that: this on-lining soften annealing system does not have refrigerating unit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122697A (en) * | 2021-02-24 | 2021-07-16 | 中铝材料应用研究院有限公司 | Accelerated aging treatment method for metal plate strip |
| 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122697A (en) * | 2021-02-24 | 2021-07-16 | 中铝材料应用研究院有限公司 | Accelerated aging treatment method for metal plate strip |
| 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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