CN114289504B - Copper/high carbon steel composite material, special V-shaped gas protection cover thereof, laser-assisted preparation method and application - Google Patents
Copper/high carbon steel composite material, special V-shaped gas protection cover thereof, laser-assisted preparation method and application Download PDFInfo
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Abstract
The invention discloses a special V-shaped gas protection cover for a copper/high carbon steel composite material, which comprises a V-shaped shell (3) surrounded by a base plate (1), a cladding plate (2) and a side plate; and an included angle between the copper strip and the high-carbon steel strip is 30-45 degrees. The invention also discloses a copper/high-carbon steel composite material, a laser-assisted preparation method thereof and application thereof in the conductive spring and/or the precise gasket. The invention forms a melting layer, remarkably reduces the dependence of copper/high carbon steel rolling composite on deformation, can realize interface combination of copper/high carbon steel under extremely small rolling deformation, avoids the problem of poor deformation coordination, and generates a vortex zone at a local position of the melting layer under the rolling action, thereby forming a wave-shaped interface or a copper steel transition layer at the local position of the interface, which is similar to the transition layer of explosion composite, and can further enhance the interface combination effect.
Description
Technical Field
The invention relates to a copper/high carbon steel composite material, a special V-shaped gas protection cover thereof, a laser auxiliary preparation method and application thereof, and belongs to the technical field of metallurgical materials.
Background
The copper/steel composite material has the advantages of copper and steel and is widely applied to the fields of petrochemical industry, nuclear energy, bearings, electric appliances and the like. At present, the preparation method of the copper/steel composite material mainly comprises explosion welding, diffusion welding, rolling compounding and the like. In the method, the rolling composite efficiency is high, the composite material with stable performance and uniform thickness can be continuously produced, and the method has a better application prospect and is a future development trend. However, the copper/high carbon steel composite material is difficult to directly prepare by adopting rolling compounding due to large deformation resistance, poor plasticity and poor welding performance, which restricts mass production and application of the copper/high carbon steel composite material. In order to realize the rolling compounding of copper/high carbon steel, the required rolling deformation is required to be reduced, and the deformation coordination is improved.
Copper/high carbon steel can be used for preparing conductive springs, precise gaskets and the like, has good engineering application prospect, but is difficult to prepare. Paper Chen Chen, microstructure and Structure characterization of copper/Steel composite [ D ]]Beijing: the university of petroleum (Beijing), 2016", discloses a method for preparing a copper/65 Mn high carbon steel composite material, which is mainly characterized in that: firstly, hot pressing is carried out in a vacuum hot pressing furnace, and the vacuum degree of a furnace body is 5 multiplied by 10 during hot pressing -3 Pa, hot pressing temperature 950 ℃, holding pressure for 30min, and realizing preliminary bonding of interfaces through hot pressing; then, forging and rolling were performed at 850 ℃. The method has the defects of complicated process, long time, difficult mass production and certain limitation. Paper "Chen Jingqi, liu Xianghua, shu et al, copper/steel/copper cold rolled composite thin strip bending performance experimental study [ J]University of northeast journal (natural science edition), 2019, 40 (5): 647-652' discloses a preparation method of a T3 copper/Q345 steel composite material, which is mainly characterized in that: and adopting single-pass room temperature rolling, wherein the rolling deformation is 75%, and annealing for 2 hours at 1000 ℃ after rolling. The method successfully realizes the rolling compounding of copper/low carbon steel, but has larger required deformation and is difficult to be applied to the preparation of copper/high carbon steel composite materials. Patent CN2019111654191 discloses a superplastic rolling method for heating dissimilar metal composite materials by laser, but the extrusion ratio (deformation amount) of the method is larger and is 4/3, which can cause the problem of poor deformation coordination, and the method prescribes that a melting layer is not allowed to be generated before rolling, and interface metallurgical bonding is difficult to realize, so that the method cannot be used for preparing copper/high carbon steel composite materials with large plastic difference.
In summary, the preparation method of the copper/steel composite material mainly comprises explosion welding, diffusion welding, rolling compounding and the like. In the method, the rolling composite efficiency is high, the copper/steel composite plate strip with uniform thickness can be continuously produced, and the method has a good application prospect and is a future development trend. However, the deformation amount required by rolling and compounding is large, and the rolling and compounding is limited to copper/low carbon steel composite materials at present. For copper and high-carbon steel with larger plastic difference, on one hand, the high-carbon steel is difficult to deform, and on the other hand, the deformation coordination of the high-carbon steel and the copper is poor, so that the interface combination of the high-carbon steel and the copper is difficult to realize directly through rolling, and the batch production and the application of the copper/high-carbon steel composite plate strip are restricted. In order to realize the rolling compounding of copper/high-carbon steel, the assembly is performed in advance by adopting explosion welding or diffusion welding at present, and then the rolling is performed, so that additional production procedures are added, the production period is longer, and the process is more complicated. Poor deformation coordination and large rolling deformation are main technical problems faced by composite materials such as copper/high carbon steel and the like.
In summary, the copper/high carbon steel composite material is difficult to directly prepare by rolling composite due to the large rolling deformation and poor deformation coordination, which limits the mass production of the copper/high carbon steel composite material. For this reason, a method is needed that can achieve metallurgical bonding of copper/high carbon steel interfaces with very little rolling deformation.
Disclosure of Invention
The invention aims to solve the technical problem that the special V-shaped gas protection cover for the copper/high carbon steel composite material is provided, 30-45 DEG rolling of copper strips and high carbon steel strips is realized by adopting the protection cover, then a vortex area is formed, a transition layer is generated at a local position, the transition layer is similar to an explosion composite transition layer, and the interface metallurgical bonding is facilitated because the local position interface is in a wave shape.
Meanwhile, the invention provides a laser-assisted preparation method of the copper/high carbon steel composite material, which obviously reduces the deformation required by the copper/high carbon steel rolling composite process and avoids the problem of poor deformation coordination of the copper/high carbon steel rolling composite process.
Meanwhile, the invention provides a copper/high carbon steel composite material, wherein a transition layer or a wave-shaped interface exists at the local position of the bonding interface of the material, and the bonding is good without holes.
Meanwhile, the invention provides application of the copper/high-carbon steel composite material in the conductive spring and/or the precise gasket.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a special V-shaped gas protection cover for a copper/high carbon steel composite material, which comprises a V-shaped shell surrounded by a base plate, a cladding plate and a side plate;
arc grooves matched with the rollers are formed in the outer walls of the base plate and the covering plate;
an upper limit roller and a lower limit roller are arranged on the inlet end, close to the shroud plate, of the V-shaped shell, and a gap between the upper limit roller and the lower limit roller is a copper strip inlet;
a left limiting wheel and a right limiting wheel are arranged on the V-shaped shell close to the inlet end of the base plate; a high carbon steel belt inlet is arranged between the left limit wheel and the right limit wheel;
a baffle is arranged at the inlet end close to the lower limit roller;
a laser irradiation window is arranged below the baffle;
the copper strips and the high-carbon steel strips penetrate out of the outlet end of the V-shaped shell;
after the copper strip and the high-carbon steel strip penetrate through the copper strip inlet and the high-carbon steel strip inlet respectively, an included angle between the copper strip and the high-carbon steel strip is 30-45 degrees;
the side plates are provided with protective gas inlet holes.
Preferably, the shielding gas comprises nitrogen.
Preferably, the rolls include an upper roll and a lower roll.
Preferably, the angle between the copper strip and the high carbon steel strip is 45 °.
Meanwhile, the invention provides a laser-assisted preparation method of the copper/high-carbon steel composite material, which comprises the following steps:
step 1: preparing a pure copper strip and a high-carbon steel strip;
step 2: cleaning and polishing the surfaces to be combined of the copper belt and the high-carbon steel belt to remove surface residues;
step 3: placing a copper strip on the upper side, placing a high-carbon steel strip on the lower side, enabling the copper strip to pass through a gap between an upper limit roller and a lower limit roller of a V-shaped gas protection cover, and enabling the high-carbon steel strip to pass through a high-carbon steel strip inlet between a left limit wheel and a right limit wheel, so that an included angle between the copper strip and the high-carbon steel strip is 30-45 degrees;
step 4: filling protective gas into the V-shaped gas protective cover, wherein the protective gas flow is 5-15L/min;
step 5: heating the surface of the high-carbon steel strip at the position of the interface to be combined of the copper strip and the high-carbon steel strip by adopting a rectangular light spot laser with flat-top energy density distribution, wherein the laser irradiation angle is 15-20 degrees, and the energy density of the used laser is 80-150W/mm 2 The laser spot size is (2-10) x (5-150) mm, so that a melting layer with the thickness of 50-200 mu m is generated on the surface of the high-carbon steel strip at the interface position to be combined;
step 6: and rolling after forming a melting layer on the surface of the high-carbon steel strip, wherein the rolling deformation is 0.5% -5%, the rolling speed is 10% -50 mm/s, and the copper-steel interface position is enabled to form a vortex area under the action of rolling pressure, so that the copper-steel interface is enabled to form a transition layer or a wave-shaped interface, and metallurgical bonding of the interface is realized.
In step 5, the heating time corresponds to the rolling speed and is approximately equal to: the laser spot width divided by the rolling speed.
Preferably, the thickness of the pure copper belt is 0.3-1.0 mm; the thickness of the high-carbon steel strip is 1.0-4.0 mm.
Meanwhile, the invention provides a copper/high carbon steel composite material obtained by adopting the laser-assisted preparation method.
Meanwhile, the invention provides application of the copper/high-carbon steel composite material in the conductive spring and/or the precise gasket.
The invention has the following beneficial effects:
according to the method, the molten layer is formed on the surface of the high-carbon steel by laser irradiation, the rolling compounding of the copper/high-carbon steel can be realized by the extremely small rolling deformation under the action of the V-shaped gas protection cover, the rolling deformation can enable the local position of the molten layer of the copper/steel interface to generate a vortex region under the proper laser energy density, and a transition layer of copper and steel or a similar wave-shaped interface can be formed at the interface position by controlling the vortex region, so that the interface metallurgical bonding is facilitated, and the defect of the traditional rolling solid-solid phase compounding process is overcome. In addition, the invention expands the rolling compounding to the copper/high carbon steel composite material which is more difficult to prepare by the auxiliary action of laser, thereby being beneficial to promoting the batch preparation of the copper/high carbon steel composite plate strip.
According to the method, the laser irradiates the surface of the high-carbon steel at the position of the interface to be combined of the copper and the high-carbon steel, so that a melting layer is generated on the surface of the high-carbon steel, good combination of the interface can be realized under the condition of extremely small rolling deformation, the problem of incompatibility of deformation is avoided, and in the method, the laser only acts on the surface of the high-carbon steel, so that the plastic difference between the copper and the high-carbon steel is reduced, and the incompatibility of the deformation in the copper/high-carbon steel rolling composite process can be further solved. Unlike conventional rolling compounding, the method of the present invention utilizes the high energy density of laser to change the metal state near the interface, i.e. to produce molten layer, to realize solid-liquid or liquid-liquid contact, and to increase the atom diffusion speed, so as to reduce the dependence on rolling deformation. In addition, the invention provides the V-shaped gas protection cover, which can prevent the surface of the melting layer from being oxidized, can ensure that the included angle between the copper belt and the high-carbon steel belt is 30-45 degrees, can concentrate laser energy on the surface of the high-carbon steel, further forms the melting layer with the optimal thickness on the surface of the high-carbon steel, and fully plays the auxiliary role of laser.
According to the invention, the clamping angle between the copper belt and the high-carbon steel belt is adjusted to be 30-45 degrees, when the included angle is too small, laser is difficult to directly act on the surface of the high-carbon steel, excessive energy is absorbed by the copper belt, a melting layer is difficult to form on the surface of the high-carbon steel, and interface bonding is poor; when the included angle is too large, the copper strip is obviously bent and deformed before rolling, so that the combination effect is affected, and part of laser energy is easily reflected by the copper strip, so that energy loss is caused, and the combination effect is affected.
Drawings
FIG. 1 is a schematic illustration of a laser assisted method of making a copper/high carbon steel composite of the present invention;
FIG. 2 is a schematic view of a V-type gas shield of the present invention;
FIG. 3 shows the laser energy density of 80W/mm in the present invention 2 A microstructure of the surface melt layer at a scanning speed of 10 mm/s;
FIG. 4 is a schematic illustration of the formation of "vortex zones" of the melt layer under rolling action in accordance with the present invention;
FIG. 5 is a microstructure of the copper/high carbon steel bond interface of example 1 of the present invention;
FIG. 6 is a microstructure of the copper/high carbon steel bond interface of example 2 of the present invention;
FIG. 7 is a microstructure of example 3 copper/high carbon steel bond interface;
FIG. 8 is a microstructure of a copper/high carbon steel bond interface of comparative example 1 of the present invention;
FIG. 9 is a microstructure of the copper/high carbon steel bond interface of comparative example 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail with reference to the accompanying drawings and examples. The specific embodiments described herein are to be considered in an illustrative sense only and are not intended to limit the invention.
The test methods described in the following examples, unless otherwise specified, are all conventional; the reagents and materials, unless otherwise specified, are commercially available.
The pure copper strips and high carbon steel strips according to the invention can be produced according to the preparation methods disclosed in the prior art or can be obtained directly from commercial sources.
A schematic diagram of the preparation method according to the embodiment of the invention is shown in FIG. 1. A schematic view of the V-shaped gas shield is shown in fig. 2. The laser energy density in the preparation method of the invention is 80W/mm 2 High carbon steel surface at a moving speed of 10mm/sA picture of the melt layer structure is shown in fig. 3.
In the embodiment of the invention, a metallographic microscope is adopted to observe the microstructure of the copper/high carbon steel combined interface. The embodiment of the invention adopts the standard metallographic preparation method: the longitudinal sections parallel to the rolling direction were ground with 240, 600, 800, 1000, 1200 and 1500 grit paper and polished with water-soluble diamond paste. When observing the microstructure, the nitric acid alcohol solution and the picric acid solution with the volume fraction of 4 percent are adopted for corrosion at room temperature, and the corrosion time is 8 s.
Example 1:
as shown in fig. 2, a special V-shaped gas protection cover for copper/high carbon steel composite material comprises a V-shaped shell 3 surrounded by a base plate 1, a shroud plate 2 and a side plate;
arc grooves matched with the rollers 4 are formed in the outer walls of the base plate 1 and the covering plate 2;
an upper limit roller 5 and a lower limit roller 6 are arranged on the V-shaped shell 3 close to the inlet end 15 of the shroud plate 2, and a gap between the upper limit roller 5 and the lower limit roller 6 is a copper strip inlet 7;
a left limit wheel 8 and a right limit wheel 9 are arranged on the inlet end 15 of the V-shaped shell 3, which is close to the base plate 1; a high-carbon steel belt inlet 10 is arranged between the left limit wheel 8 and the right limit wheel 9;
a baffle 11 is arranged at the inlet end 5 close to the lower limit roller 6;
below the baffle 11 is a laser irradiation window 12;
the copper strips and the high-carbon steel strips penetrate out of the outlet end 13 of the V-shaped shell 3;
after the copper strip and the high-carbon steel strip penetrate through the copper strip inlet 7 and the high-carbon steel strip inlet 10 respectively, an included angle between the copper strip and the high-carbon steel strip is 45 degrees;
the side plates are provided with a protective gas inlet hole 14, and the protective gas is nitrogen.
The protective cover prevents oxidation of the surface of the melting layer, ensures that the included angle between the copper belt and the high-carbon steel belt is 45 degrees, and ensures that laser energy is concentrated on the surface of the high-carbon steel by arranging the baffle plate 11, so that the melting layer with the optimal thickness is formed on the surface of the high-carbon steel, and the auxiliary effect of laser is fully exerted.
As shown in fig. 1, a laser-assisted preparation method of a copper/high carbon steel composite material comprises the following steps: cleaning and polishing the surfaces to be combined of copper strips with the thickness of 0.3-mm and high-carbon steel strips with the thickness of 1.2-mm, and the laser energy density of 80W/mm 2 The laser irradiation angle is 15 degrees, the clamping angle of the copper strip and the high-carbon steel strip is 45 degrees, the laser spot size is 3 multiplied by 10mm, the rolling deformation is 2 percent, the rolling speed is 15 mm/s, the nitrogen flow is 5L/min, the surface of the high-carbon steel strip at the position of the interface to be bonded generates a melting layer with the thickness of 50 mu m, the microstructure of the bonded interface after rolling is shown in figure 5, the bonded interface has no holes, and the bonding is good.
The copper/high carbon steel composite material obtained by the laser-assisted preparation method of the embodiment has no holes at the bonding interface and good bonding. And may be used in conductive springs and/or precision washers.
Example 2:
a laser-assisted preparation method of a copper/high-carbon steel composite material comprises the following steps: cleaning and polishing the surfaces to be combined of copper strips with the thickness of 0.3 and mm and high-carbon steel strips with the thickness of 1.2 and mm, and the laser energy density is 120W/mm 2 The laser irradiation angle is 15 degrees, the clamping angle of the copper strips and the high-carbon steel strips is 45 degrees, the laser spot size is wide multiplied by length=3 multiplied by 10mm, the rolling deformation is 2%, the rolling speed is 25 mm/s, and the nitrogen flow is 5L/min. And rolling deformation is carried out to enable the interface of the melting layer to form a vortex area, so that a copper-steel transition layer is generated at a local position, and finally, the copper/high carbon steel composite plate strip with good interface combination is obtained. The microstructure of the bonding interface after rolling is shown in fig. 6, and a transition layer is arranged at the local position of the bonding interface, so that the bonding is good without holes.
Example 3:
a laser-assisted preparation method of a copper/high-carbon steel composite material comprises the following steps: cleaning and polishing the surfaces to be combined of copper strips with the thickness of 0.3 and mm and high-carbon steel strips with the thickness of 1.2 and mm, and the laser energy density is 120W/mm 2 The laser irradiation angle is 15 degrees, the clamping angle of the copper belt and the high-carbon steel belt is 45 degrees,the laser spot size is 3×10mm, the rolling deformation is 2%, the rolling speed is 20 mm/s, the nitrogen flow is 5L/min, and the surface of the high-carbon steel strip at the interface position to be bonded generates a melting layer with the thickness of 200 μm. The microstructure of the bonding interface after rolling is shown in fig. 7, and a transition layer is arranged at the local position of the bonding interface, so that the bonding is good without holes.
Example 4:
this embodiment differs from embodiment 1 only in that: a V-shaped gas protection cover special for a copper/high-carbon steel composite material is characterized in that an included angle between a copper belt and the high-carbon steel belt is 30 degrees.
A laser-assisted preparation method of a copper/high-carbon steel composite material comprises the following steps: cleaning and polishing the surfaces to be combined of copper strips with the thickness of 1.0mm and high-carbon steel strips with the thickness of 4.0mm, and ensuring the laser energy density to be 150W/mm 2 The laser irradiation angle is 20 degrees, the included angle between the copper belt and the high-carbon steel belt is 30 degrees, the laser spot size is 10 multiplied by 150 mm, the rolling deformation is 5%, the rolling speed is 50mm/s, and the nitrogen flow is 15L/min. The bonding interface after rolling has a transition layer without holes, and the bonding is good.
Example 5:
a laser-assisted preparation method of a copper/high-carbon steel composite material comprises the following steps: cleaning and polishing the surfaces to be combined of copper strips with the thickness of 0.5mm and high-carbon steel strips with the thickness of 1.0mm, wherein the laser energy density is 100W/mm 2 The laser irradiation angle is 20 degrees, the included angle between the copper strip and the high-carbon steel strip is 30 degrees, the laser spot size is 2X 5mm, the rolling deformation is 0.5%, the rolling speed is 10mm/s, and the nitrogen flow is 10L/min. The bonding interface after rolling has a wave-shaped metallurgical interface, has no holes and is well bonded.
Comparative example 1:
a laser-assisted preparation method of a copper/high-carbon steel composite material comprises the following steps: cleaning and polishing the surfaces to be combined of copper strips with the thickness of 0.3 and mm and high-carbon steel strips with the thickness of 1.0 and mm, and the laser energy density is 120W/mm 2 The laser irradiation angle is 15 degrees, the included angle between the copper strip and the high-carbon steel strip is 25 degrees, the laser spot size is 3 multiplied by 10mm, the rolling deformation is 2 percent, and the rolling speed is 20The nitrogen flow is 5L/min. The microstructure of the bonding interface after rolling is shown in fig. 8, and the bonding interface is poor and has obvious defects. The laser beam is difficult to directly act on the surface of the high-carbon steel due to the fact that the clamping angle between the copper strip and the high-carbon steel is too small, a melting layer is not formed on the surface of the high-carbon steel, excessive laser energy is absorbed and reflected by copper, the melting point of the copper is low, a melting layer is formed, and a good bonding effect is not formed under the action of rolling pressure.
Comparative example 2:
a laser-assisted preparation method of a copper/high-carbon steel composite material comprises the following steps: cleaning and polishing the surfaces to be combined of copper strips with the thickness of 0.3 mm and high-carbon steel strips with the thickness of 3 mm, and the laser energy density of 120W/mm 2 The laser irradiation angle is 15 degrees, the included angle between the copper strip and the high-carbon steel strip is 60 degrees, the laser spot size is 3 multiplied by 10mm, the rolling deformation is 0.5%, the rolling speed is 20 mm/s, and the nitrogen flow is 5L/min. The microstructure of the local position of the bonded interface after rolling is shown in fig. 9, and the interface is not bonded. The copper strip is bent and deformed due to the fact that the included angle is too large, and part of energy is reflected by the copper strip to cause loss, so that the effect of laser is weakened.
The invention can realize the combination of copper/high carbon steel interface under the condition of extremely small rolling deformation, avoid the problem of poor deformation coordination, and under the proper laser energy density, the rolling deformation can lead the melted interface to form a vortex area (shown in figure 4), thereby leading the local position of the interface to form a wave-shaped interface or a transition layer of copper steel, and the transition layer is similar to the transition layer generated by the explosion and the recombination of copper/steel, and is beneficial to the firm combination of the interface. In addition, the method is easy to control, has higher production efficiency, can realize batch production of copper/high-carbon steel composite materials, and has good economic benefit.
According to the method, the laser irradiates the surface of the high-carbon steel at the position of the interface to be combined of copper and the high-carbon steel, so that a melting layer is generated on the surface of the high-carbon steel (as shown in figure 3), good combination of the interface can be realized under the condition of extremely small rolling deformation, the problem of deformation incompatibility is avoided, and in the method, the laser only acts on the surface of the high-carbon steel, so that the plastic difference between the copper and the high-carbon steel is reduced, and the problem of deformation incompatibility in the copper/high-carbon steel rolling compounding process can be further solved.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A special V-shaped gas protection cover for copper/high carbon steel composite materials is characterized in that: comprises a V-shaped shell (3) surrounded by a base plate (1), a shroud plate (2) and side plates;
arc-shaped grooves matched with the rollers (4) are formed in the outer walls of the base plate (1) and the covering plate (2);
an upper limit roller (5) and a lower limit roller (6) are arranged on the inlet end (15) of the V-shaped shell (3) close to the shroud plate (2), and a gap between the upper limit roller (5) and the lower limit roller (6) is a copper strip inlet (7);
a left limit wheel (8) and a right limit wheel (9) are arranged on the inlet end (15) of the V-shaped shell (3) close to the base plate (1); a high-carbon steel belt inlet (10) is arranged between the left limit wheel (8) and the right limit wheel (9);
a baffle (11) is arranged at the inlet end (15) close to the lower limit roller (6);
a laser irradiation window (12) is arranged below the baffle (11);
the copper strips and the high-carbon steel strips penetrate out of an outlet end (13) of the V-shaped shell (3);
after the copper strip and the high-carbon steel strip penetrate through the copper strip inlet (7) and the high-carbon steel strip inlet (10) respectively, an included angle between the copper strip and the high-carbon steel strip is 30-45 degrees;
the side plates are provided with protective gas inlet holes (14).
2. The special V-shaped gas shield for copper/high carbon steel composite material according to claim 1, wherein: the shielding gas comprises nitrogen.
3. The special V-shaped gas shield for copper/high carbon steel composite material according to claim 1, wherein: the roll (4) comprises an upper roll and a lower roll.
4. The special V-shaped gas shield for copper/high carbon steel composite material according to claim 1, wherein: the included angle between the copper strip and the high-carbon steel strip is 45 degrees.
5. The laser-assisted preparation method of the copper/high-carbon steel composite material by adopting the special V-shaped gas protection cover for the copper/high-carbon steel composite material according to any one of claims 1-4, which is characterized by comprising the following steps: the method comprises the following steps:
step 1: preparing a pure copper strip and a high-carbon steel strip;
step 2: cleaning and polishing the surfaces to be combined of the copper belt and the high-carbon steel belt to remove surface residues;
step 3: placing a copper strip on the upper side, placing a high-carbon steel strip on the lower side, enabling the copper strip to pass through a gap between an upper limit roller (5) and a lower limit roller (6) of a V-shaped gas protection cover, and enabling the high-carbon steel strip to pass through a high-carbon steel strip inlet (10) between a left limit wheel (8) and a right limit wheel (9), so that an included angle between the copper strip and the high-carbon steel strip is 30-45 degrees;
step 4: filling protective gas into the V-shaped gas protective cover, wherein the protective gas flow is 5-15L/min;
step 5: heating the surface of the high-carbon steel strip at the position of the interface to be combined of the copper strip and the high-carbon steel strip by adopting a rectangular light spot laser with flat-top energy density distribution, wherein the laser irradiation angle is 15-20 degrees, and the energy density of the used laser is 80-150W/mm 2 The laser spot size is (2-10) ×5-150) mm, and enabling the surface of the high-carbon steel strip at the interface position to be bonded to generate a melting layer with the thickness of 50-200 mu m;
step 6: and rolling after forming a melting layer on the surface of the high-carbon steel strip, wherein the rolling deformation is 0.5% -5%, the rolling speed is 10% -50 mm/s, and the copper-steel interface position is enabled to form a vortex area under the action of rolling pressure, so that the copper-steel interface is enabled to form a transition layer or a wave-shaped interface, and metallurgical bonding of the interface is realized.
6. The laser assisted preparation method according to claim 5, characterized in that: the thickness of the pure copper belt is 0.3-1.0 mm; the thickness of the high-carbon steel strip is 1.0-4.0 mm.
7. A copper/high carbon steel composite obtained by the laser-assisted preparation method according to claim 5.
8. Use of a copper/high carbon steel composite according to claim 7 in conductive springs and/or precision washers.
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| CN1583303A (en) * | 2004-06-09 | 2005-02-23 | 沈阳工业大学 | Rolling method and apparatus for copper-aluminium double-face composite board |
| DE102008036435A1 (en) * | 2008-02-13 | 2009-08-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Producing metallic material composites and composite semi-finished products, comprises hot-roll plating a strip made of basic material with a strip of coating material or strips of the coating material using laser- and inductive support |
| CN101898435A (en) * | 2010-07-23 | 2010-12-01 | 浙江兆隆合金股份有限公司 | Copper-steel composite material and preparation method thereof |
| CN111558765A (en) * | 2020-04-16 | 2020-08-21 | 西安理工大学 | Preparation method for GMAW electric arc additive manufacturing copper-steel composite material |
| CN112872037A (en) * | 2021-02-08 | 2021-06-01 | 浙江工业大学 | Device and method for compositely manufacturing three-layer composite metal plate strip by laser rolling |
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2022
- 2022-01-04 CN CN202210000572.4A patent/CN114289504B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1605321A (en) * | 1968-06-04 | 1974-08-02 | Steel strip covered with stainless steel | |
| CN1583303A (en) * | 2004-06-09 | 2005-02-23 | 沈阳工业大学 | Rolling method and apparatus for copper-aluminium double-face composite board |
| DE102008036435A1 (en) * | 2008-02-13 | 2009-08-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Producing metallic material composites and composite semi-finished products, comprises hot-roll plating a strip made of basic material with a strip of coating material or strips of the coating material using laser- and inductive support |
| CN101898435A (en) * | 2010-07-23 | 2010-12-01 | 浙江兆隆合金股份有限公司 | Copper-steel composite material and preparation method thereof |
| CN111558765A (en) * | 2020-04-16 | 2020-08-21 | 西安理工大学 | Preparation method for GMAW electric arc additive manufacturing copper-steel composite material |
| CN112872037A (en) * | 2021-02-08 | 2021-06-01 | 浙江工业大学 | Device and method for compositely manufacturing three-layer composite metal plate strip by laser rolling |
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