Preparation method of metal solid-liquid composite plate strip

Abstract

The invention provides a preparation method of a metal solid-liquid composite plate strip, which comprises the following steps: a smelting process: smelting a cast ingot containing first metal to obtain a molten pool; a refining procedure: adding a refining agent and inert gas into the molten pool for refining treatment, and standing after the refining treatment to obtain the metal solution containing the first metal; a grain refinement step of adding a grain refiner to the metal solution containing the first metal to perform grain refinement treatment to obtain a metal solution after the grain refinement step; a continuous casting process: enabling the metal solution subjected to the grain refining process to be in contact with a base plate strip and performing continuous casting treatment to form a coating layer on the surface of the base plate strip to obtain a composite plate strip blank; and a rolling procedure: carrying out rolling treatment on the composite plate strip blank to obtain the composite plate strip. The composite plate strip prepared by the preparation method has good bending performance and bonding strength, so that the composite plate strip has relatively long service life.

Description

Technical Field

[0001] The invention relates to the technical field of composite plates and strips, and in particular to a method for preparing a metal solid-liquid composite plate and strip. Background Art

[0002] Composite plates and strips generally refer to plates and strips produced by metallurgical bonding of two or more metals with different materials and properties through composite processing. This can overcome some of the shortcomings of a single material, give full play to the advantages of different materials, and make the composite plates and strips have good comprehensive properties, such as high specific strength, good electrical conductivity, thermal conductivity, corrosion resistance, shock absorption, wear resistance, etc.

[0003] However, in the related art, the bending performance and bonding strength of the composite strip are insufficient, resulting in a decrease in the service life of the composite strip. Summary of the invention

[0004] The invention provides a method for preparing a metal solid-liquid composite plate strip. The composite plate strip prepared by the preparation method has good bending performance and bonding strength, so that it has a long service life.

[0005] An embodiment of the present invention provides a method for preparing a metal solid-liquid composite strip, comprising:

[0006] A smelting step, smelting the ingot containing the first metal at 700° C. to 750° C. to obtain a molten pool;

[0007] A refining step, adding a refining agent and an inert gas into the molten pool for refining treatment, and allowing the molten pool to stand after the refining treatment to obtain the metal solution containing the first metal;

[0008] A grain refining step, adding a grain refining agent to the metal solution containing the first metal to perform grain refining treatment to obtain a metal solution after the grain refining step;

[0009] A continuous casting process, wherein the molten metal after the grain refinement process is brought into contact with a base plate strip and subjected to continuous casting treatment to form a coating on the surface of the base plate strip to obtain a composite plate strip blank, wherein the width of the composite plate strip blank is 10 mm to 2000 mm, and the thickness of the composite plate strip blank is 2 mm to 100 mm;

[0010] The rolling process is to roll the composite plate and strip blank to obtain the composite plate and strip, wherein the rolling pressure is 5000N to 500000N, the rolling temperature is 0°C to 500°C, and the rolling tension is 0N to 2000000N.

[0011] In some embodiments of the present invention, the first metal comprises aluminum;

[0012] And / or, the base plate strip includes at least one of aluminum, copper, titanium, iron and alloys thereof.

[0013] In some embodiments of the present invention, in the grain refining process, the grain refiner includes one or more of titanium boride, aluminum boride and Al-RE-B refiner, wherein RE is one or more of aluminum and rare earth metal elements.

[0014] It comprises aluminum titanium boron wire, and the addition amount A of the aluminum titanium boron wire and the mass B of the first metal in the molten pool satisfy: 0.1%≤A / B≤3%.

[0015] In some embodiments of the present invention, the grain refiner includes two or more of Al-Ce-B, Al-YB and aluminum titanium boron wire.

[0016] In some embodiments of the present invention, the molten pool after the refining treatment is allowed to stand at 700° C. to 750° C. for 15 min to 45 min.

[0017] In some embodiments of the present invention, the continuous casting process comprises:

[0018] A texturing step, performing a texturing treatment on the plate strip containing the second metal to obtain a textured plate strip;

[0019] A cleaning step of cleaning the roughened plate strip to obtain a cleaned plate strip;

[0020] The continuous casting step is to contact the cleaned plate and strip with the metal solution after the grain refinement process at 25° C. to 500° C. and perform continuous casting treatment to obtain a composite plate and strip blank.

[0021] In some embodiments of the present invention, the continuous casting speed is 200 mm / min to 3000 mm / min.

[0022] In some embodiments of the present invention, in the rolling process, the peeling force of the composite strip at room temperature is 80N / mm to 200N / mm.

[0023] In some embodiments of the present invention, the preparation method further comprises:

[0024] The trimming step is to perform trimming treatment on the edge of the composite plate strip.

[0025] The preparation method of the metal solid-liquid composite provided by the present invention can make the coating formed on the base plate strip have smaller grains to enhance its bonding strength with the surface of the base plate strip, and also have good bending performance through a smelting process, a refining process, a grain refinement process, a continuous casting process and a rolling process.

[0026] The above description is only an overview of the technical solution of this specification. In order to more clearly understand the technical means of this specification, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of this specification more obvious and easy to understand, the specific implementation methods of this specification are listed below. DETAILED DESCRIPTION

[0027] The "range" disclosed in the present invention is defined in the form of a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range.

[0028] Unless otherwise specified, the terms used in the present invention have the commonly understood meanings that are generally understood by those skilled in the art.

[0029] Unless otherwise specified, the values ​​of the parameters mentioned in the present invention can be measured by various test methods commonly used in the art, for example, they can be measured according to the test methods given in the embodiments of the present invention.

[0030] An embodiment of the present invention provides a method for preparing a metal solid-liquid composite strip, comprising:

[0031] S100, a smelting step of smelting the ingot containing the first metal at 700° C. to 750° C. to obtain a molten pool;

[0032] S200, a refining step, adding a refining agent and an inert gas into the molten pool for refining treatment, and allowing the molten pool to stand after the refining treatment to obtain the metal solution containing the first metal;

[0033] S300, a grain refining step, adding a grain refining agent to the metal solution containing the first metal to perform grain refining treatment to obtain a metal solution after the grain refining step;

[0034] S400, a continuous casting process, wherein the molten metal after the grain refinement process is brought into contact with the base plate strip and subjected to a continuous casting process, so as to form a coating on the surface of the base plate strip to obtain a composite plate strip blank, wherein the width of the composite plate strip blank is 10 mm to 2000 mm, and the thickness of the composite plate strip blank is 2 mm to 100 mm;

[0035] S500, rolling process, rolling the composite plate and strip blank to obtain a composite plate and strip, wherein the rolling pressure is 5000N to 5000000N, the rolling temperature is 0°C to 500°C, and the rolling tension is 0N to 2000000N.

[0036] The preparation method of the metal solid-liquid composite provided by the present invention can make the coating formed on the base plate strip have smaller grains to enhance its bonding strength with the surface of the base plate strip, and also have good bending performance through a smelting process, a refining process, a grain refinement process, a continuous casting process and a rolling process.

[0037] In some embodiments of the present invention, the first metal includes aluminum; and / or the base plate includes at least one of aluminum, copper, titanium, iron and alloys thereof. By selecting the above metals, a copper-aluminum composite plate, a steel-aluminum composite plate, a titanium-aluminum composite plate, an aluminum-aluminum composite plate, etc. can be obtained, so that the prepared composite plate has very good application scenarios.

[0038] In some embodiments of the invention, the ingot comprises an aluminum ingot.

[0039] In the embodiment of the present invention, the refining agent can be selected according to the type of the ingot. For example, if the ingot is an aluminum ingot, the refining agent can be an aluminum alloy refining agent, and the aluminum alloy refining agent can be an aluminum alloy refining agent of CAS: 67-72-1.

[0040] In some embodiments of the present invention, in the grain refining process, the grain refiner includes one or more of titanium boride, aluminum boride and Al-RE-B refiner, wherein RE is one or more of aluminum and rare earth metal elements.

[0041] In some embodiments of the present invention, the grain refiner may include aluminum titanium boron wire. By adding aluminum titanium boron wire, the size of the grains in the coating can be further reduced, which can increase the number of grains per unit area, and the number of grains with different orientations around each grain is also large, which can not only enhance the resistance to plastic deformation, but also enable deformation to occur in more grains, thereby making the deformation more uniform, reducing stress concentration, and thus enhancing the bending performance of the composite strip. In addition, the small grains give it a larger specific surface area, thereby increasing the contact area between the coating and the base strip, thereby enhancing the bonding strength of the composite strip.

[0042] In order to make the grains in the cladding layer have a suitable grain size, the amount of the grain refiner added can be optimized based on the mass of the first metal in the grains.

[0043] In some embodiments of the present invention, the addition amount A of the grain refiner and the mass B of the first metal in the molten pool satisfy: 0.1%≤A / B≤3%.

[0044] In some embodiments of the present invention, the grain refiner includes two or more of Al-Ce-B, Al-YB and aluminum titanium boron wire.

[0045] In the above embodiment, the reasonable combination of the above grain refiners can help to further reduce the size of the grains in the coating, so that the bending performance and bonding strength of the composite plate strip can be further improved.

[0046] In some embodiments of the present invention, the grain refiner includes Al-Ce-B and aluminum titanium boron wire, and the mass ratio of Al-Ce-B to the aluminum titanium boron wire is 1:(4-6).

[0047] In some embodiments of the present invention, the grain refiner includes Al-YB and aluminum titanium boron wire, and the mass ratio of Al-YB to the aluminum titanium boron wire is 1:(1-2).

[0048] In some embodiments of the present invention, the grain refiner includes Al-Ce-B, Al-YB and aluminum titanium boron wire, and the mass ratio of Al-Ce-B, Al-YB and aluminum titanium boron wire is 1:3:(3~6).

[0049] In some embodiments of the present invention, the molten pool after refining treatment is allowed to stand at 700° C. to 750° C. for 15 min to 45 min.

[0050] In some embodiments of the present invention, the continuous casting process comprises:

[0051] S410, a texturing step of texturing the plate strip containing the second metal to obtain a plate strip after the texturing treatment;

[0052] S420, a cleaning step of cleaning the roughened plate strip to obtain a cleaned plate strip;

[0053] S430, continuous casting step, contacting the cleaned plate and strip with the metal solution after the grain refinement process at 25°C to 500°C and performing continuous casting treatment to obtain a composite plate and strip blank.

[0054] In the above embodiment, the texturing process in S410 may be performed by a process well known in the art, such as mechanical texturing, chemical texturing or laser texturing. The cleaning process in S420 may be performed by ultrasonic cleaning or laser cleaning.

[0055] In some embodiments of the present invention, the continuous casting speed is 200 mm / min to 3000 mm / min.

[0056] In some embodiments of the present invention, the rolling speed is 1000 mm / min to 5000 mm / min.

[0057] In some embodiments of the present invention, during the rolling process, the peeling force of the composite strip at room temperature is 80 N / mm to 200 N / mm.

[0058] In some embodiments of the present invention, the preparation method further comprises:

[0059] S600, trimming process, trimming the edge of the composite plate strip.

[0060] The following embodiments describe the disclosure of the present invention in more detail, and these embodiments are only for illustrative purposes, because it is obvious to those skilled in the art that various modifications and variations are made within the scope of the disclosure of the present invention. Unless otherwise stated, all parts, percentages and ratios reported in the following embodiments are based on mass, and all reagents used in the embodiments are commercially available or synthesized according to conventional methods, and can be used directly without further processing, and the instruments used in the embodiments are commercially available.

[0061] Example 1

[0062] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0063] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0064] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0065] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0066] Add 5 g of aluminum titanium boron wire (AlTi5B1) to the metal solution at 700° C. after standing for 10 minutes to perform grain refinement treatment to obtain aluminum liquid after the grain refinement process;

[0067] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0068] The composite strip blank is subjected to cold rolling treatment to obtain a composite strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N;

[0069] The excess aluminum and the poorly composited edges on both sides of the composite plate strip are cut off.

[0070] Example 2

[0071] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0072] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0073] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0074] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0075] 10 g of aluminum titanium boron wire (AlTi5B1) was added to the metal solution at 700° C. after standing for 10 minutes to perform grain refinement treatment to obtain aluminum liquid after the grain refinement process;

[0076] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0077] The composite strip blank is subjected to cold rolling treatment to obtain a composite strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N;

[0078] The excess aluminum and the poorly composited edges on both sides of the composite plate strip are cut off.

[0079] Example 3

[0080] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0081] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0082] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0083] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0084] Add 50g of aluminum titanium boron wire (AlTi5B1) to the metal solution at 700°C after standing for 10 minutes to obtain aluminum liquid after the grain refinement process;

[0085] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0086] The composite plate and strip blank is subjected to cold rolling treatment to obtain a composite plate and strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N; excess aluminum and poorly composited edge materials on both sides of the composite plate and strip are cut off.

[0087] Example 4

[0088] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0089] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0090] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0091] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0092] 100 g of aluminum titanium boron wire (AlTi5B1) was added to the metal solution at 700° C. after standing for 10 minutes to perform grain refinement treatment to obtain aluminum liquid after the grain refinement process;

[0093] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0094] The composite plate and strip blank is subjected to cold rolling treatment to obtain a composite plate and strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N; excess aluminum and poorly composited edge materials on both sides of the composite plate and strip are cut off.

[0095] Example 5

[0096] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0097] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0098] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0099] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0100] 130 g of aluminum titanium boron wire (AlTi5B1) was added to the metal solution at 700° C. after standing for 10 minutes to perform grain refinement treatment to obtain aluminum liquid after the grain refinement process;

[0101] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0102] The composite plate and strip blank is subjected to cold rolling treatment to obtain a composite plate and strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N; excess aluminum and poorly composited edge materials on both sides of the composite plate and strip are cut off.

[0103] Example 6

[0104] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0105] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0106] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0107] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0108] 150 g of aluminum titanium boron wire (AlTi5B1) was added to the metal solution at 700° C. after standing for 10 minutes to perform grain refinement treatment to obtain aluminum liquid after the grain refinement process;

[0109] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0110] The composite plate and strip blank is subjected to cold rolling treatment to obtain a composite plate and strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N; excess aluminum and poorly composited edge materials on both sides of the composite plate and strip are cut off.

[0111] Example 7

[0112] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0113] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0114] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0115] The aluminum liquid is allowed to stand at 700°C for 30 minutes;

[0116] 130 g of aluminum titanium boron wire (AlTi5B1) was added to the metal solution at 700° C. after standing for 10 minutes to perform grain refinement treatment to obtain aluminum liquid after the grain refinement process;

[0117] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 1000 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0118] The composite plate and strip blank is subjected to cold rolling treatment to obtain a composite plate and strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N; excess aluminum and poorly composited edge materials on both sides of the composite plate and strip are cut off.

[0119] Example 8

[0120] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0121] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0122] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0123] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0124] 130 g of aluminum titanium boron wire (AlTi5B1) was added to the metal solution at 700° C. after standing for 10 minutes to perform grain refinement treatment to obtain aluminum liquid after the grain refinement process;

[0125] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 2000 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0126] The composite plate and strip blank is subjected to cold rolling treatment to obtain a composite plate and strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N; excess aluminum and poorly composited edge materials on both sides of the composite plate and strip are cut off.

[0127] Example 9

[0128] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0129] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0130] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0131] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0132] 130 g of aluminum titanium boron wire (AlTi5B1) was added to the metal solution at 700° C. after standing for 10 minutes to perform grain refinement treatment to obtain aluminum liquid after the grain refinement process;

[0133] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 3000 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0134] The composite plate and strip blank is subjected to cold rolling treatment to obtain a composite plate and strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N; excess aluminum and poorly composited edge materials on both sides of the composite plate and strip are cut off.

[0135] Example 10

[0136] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0137] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0138] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0139] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0140] 80 g of aluminum titanium boron wire (AlTi5B1) and 50 g of Al-Ce-B were added to the metal solution at 700° C. after standing for 20 minutes to obtain aluminum liquid after the grain refinement process;

[0141] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 1000 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0142] The composite strip blank is subjected to cold rolling treatment to obtain a composite strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N;

[0143] The excess aluminum and the poorly composited edges on both sides of the composite plate strip are cut off.

[0144] Embodiment 11

[0145] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0146] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0147] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0148] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0149] 80 g of aluminum titanium boron wire (AlTi5B1) and 50 g of Al-YB were added to the metal solution at 700° C. after standing for 20 minutes to obtain aluminum liquid after the grain refinement process;

[0150] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 1000 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0151] The composite strip blank is subjected to cold rolling treatment to obtain a composite strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N;

[0152] The excess aluminum and the poorly composited edges on both sides of the composite plate strip are cut off.

[0153] Example 12

[0154] This embodiment provides a method for preparing a metal solid-liquid composite strip, comprising:

[0155] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0156] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0157] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0158] 80 g of aluminum titanium boron wire (AlTi5B1), 25 g of Al-YB and 25 g of Al-YB were added to the metal solution at 700° C. after standing for 20 min to obtain aluminum liquid after the grain refinement process;

[0159] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 1000 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0160] The composite strip blank is subjected to cold rolling treatment to obtain a composite strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N;

[0161] The excess aluminum and the poorly composited edges on both sides of the composite plate strip are cut off.

[0162] Comparative Example 1

[0163] This comparative example provides a method for preparing a metal solid-liquid composite strip, comprising:

[0164] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0165] 15 g of a refining agent (CAS: 67-72-1) was added to the aluminum-containing molten pool and argon gas was blown into the molten pool to perform stirring, degassing and deslagging to obtain aluminum liquid;

[0166] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0167] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the aluminum liquid after being allowed to stand is continuously cast on the copper strip at 200°C through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0168] The composite strip blank is subjected to cold rolling treatment to obtain a composite strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N;

[0169] The excess aluminum and the poorly composited edges on both sides of the composite plate strip are cut off.

[0170] Comparative Example 2

[0171] This comparative example provides a method for preparing a metal solid-liquid composite strip, comprising:

[0172] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0173] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0174] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0175] After standing for 700℃, 3g of aluminum titanium boron wire (AlTi 5 B1) performing a grain refining treatment for 10 minutes to obtain aluminum liquid after the grain refining process;

[0176] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0177] The composite strip blank is subjected to cold rolling treatment to obtain a composite strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N;

[0178] The excess aluminum and the poorly composited edges on both sides of the composite plate strip are cut off.

[0179] Comparative Example 3

[0180] This comparative example provides a method for preparing a metal solid-liquid composite strip, comprising:

[0181] 5 kg of aluminum ingot (Al99.90) was heated to 750°C for smelting to obtain an aluminum-containing molten pool;

[0182] 15 g of a refining agent (CAS: 67-72-1) was added to a 700° C. aluminum-containing molten pool and argon gas was blown into the molten pool for 20 minutes for stirring, degassing and deslagging to obtain aluminum liquid.

[0183] The aluminum liquid is allowed to stand at 750°C for 30 minutes;

[0184] 160g of aluminum titanium boron wire (AlTi 5 B1) performing a grain refining treatment for 10 minutes to obtain aluminum liquid after the grain refining process;

[0185] The copper strip is subjected to mechanical texturing treatment and then ultrasonic cleaning, and the 700°C aluminum liquid after the grain refinement process is continuously cast on the 200°C copper strip through a casting system to obtain a composite strip blank, wherein the continuous casting speed is 200 mm / min, the width of the composite strip blank is 200 mm, and the thickness of the composite strip blank is 10 mm;

[0186] The composite strip blank is subjected to cold rolling treatment to obtain a composite strip, wherein the rolling pressure is 5000N, the rolling speed is 2000mm / min, the rolling temperature is 100°C, and the rolling tension is 10000N;

[0187] The excess aluminum and the poorly composited edges on both sides of the composite plate strip are cut off.

[0188] Test Section

[0189] (1) Bending performance test

[0190] Referring to GBT 232-2010, different bending radii were used to test the 90-degree bending performance of samples taken in the 90-degree direction, and the limit bending radius was obtained. The test results are shown in Table 1.

[0191] (2) Peel force test

[0192] Referring to the method of GJB 446, the peeling force test was performed on the composite strips of Examples 1-10 and Comparative Examples 1-3. The test results are shown in Table 1.

[0193] Table 1 Test results of Examples 1-12 and Comparative Examples 1-3

[0194]

[0195]

[0196] According to Table 1, by comparing the test results of Examples 1-12 and Comparative Examples 1-3, it can be seen that the preparation method of the metal solid-liquid composite provided by the present invention, through the smelting process, refining process, grain refinement process, continuous casting process and rolling process, can make the coating formed on the base plate have smaller grains to enhance its bonding strength with the surface of the base plate, while also enabling it to have good bending performance.

[0197] Among them, according to Table 1, by comparing the test results of Examples 1-6, it can be seen that when the refiner is within a suitable range, it can help to further improve the bonding strength and bending performance of the composite plate strip.

[0198] Comparing the test results of Examples 7-9, it can be seen that the continuous casting speed within an appropriate range can help to further improve the bonding strength and bending performance of the composite plate and strip.

[0199] Comparing the test results of Examples 10-12, it can be seen that a reasonable combination of two or more of Al-Ce-B, Al-YB and aluminum-titanium-boron wire can help to further reduce the size of the grains in the coating, thereby further improving the bending performance and bonding strength of the composite plate and strip.

[0200] Comparing Example 1 with Comparative Examples 1-3, it can be seen that in Comparative Example 1, no grain refiner is used, and in Comparative Examples 2-3, the ratio of the amount of grain refiner A added to the mass of the first metal B does not satisfy 0.1%≤A / B≤3%; when the amount of aluminum titanium boron wire added is too small, it will not have the effect of refining the grain size; and when the amount added is too large, TiB 2 The sintering and agglomeration of aluminum titanium boron wire lead to the reduction of nucleation particles, resulting in the loss of grain refining function of aluminum titanium boron wire.

[0201] Finally, it should be noted that the above experimental examples are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned experimental examples, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned experimental examples, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the experimental examples of the present invention.

Claims

1. A method for preparing a metal solid-liquid composite strip, characterized in that: include: A smelting step, smelting the ingot containing the first metal at 700° C. to 750° C. to obtain a molten pool; A refining step, adding a refining agent and an inert gas into the molten pool for refining treatment, and allowing the molten pool to stand after the refining treatment to obtain the metal solution containing the first metal; A grain refining step, adding a grain refining agent to the metal solution containing the first metal to perform grain refining treatment to obtain a metal solution after the grain refining step; A continuous casting process, wherein the molten metal after the grain refinement process is brought into contact with a base plate strip and subjected to continuous casting treatment to form a coating on the surface of the base plate strip to obtain a composite plate strip blank, wherein the width of the composite plate strip blank is 10 mm to 2000 mm, and the thickness of the composite plate strip blank is 2 mm to 100 mm; The rolling process is to roll the composite plate and strip blank to obtain the composite plate and strip, wherein the rolling pressure is 5000N to 500000N, the rolling temperature is 0°C to 500°C, and the rolling tension is 0N to 2000000N.

2. The preparation method according to claim 1, characterized in that: The first metal includes aluminum; And / or, the base plate strip includes at least one of aluminum, copper, titanium, iron and alloys thereof.

3. The preparation method according to claim 1, characterized in that: In the grain refining process, the grain refining agent includes one or more of titanium boride, aluminum boride and Al-RE-B refiner, wherein RE is one or more of aluminum and rare earth metal elements.

4. The preparation method according to claim 3, characterized in that: The addition amount A of the grain refiner and the mass B of the first metal in the molten pool satisfy: 0.1%≤A / B≤3%.

5. The preparation method according to claim 3, characterized in that: The grain refiner includes two or more of Al-Ce-B, Al-YB and aluminum titanium boron wire.

6. The preparation method according to claim 1, characterized in that: The molten pool after the refining treatment is allowed to stand at 700° C. to 750° C. for 15 min to 45 min.

7. The preparation method according to claim 1, characterized in that: The continuous casting process comprises: A texturing step, performing a texturing treatment on the plate strip containing the second metal to obtain a textured plate strip; A cleaning step of cleaning the roughened plate strip to obtain a cleaned plate strip; The continuous casting step is to contact the cleaned plate and strip with the metal solution after the grain refinement process at 25° C. to 500° C. and perform continuous casting to obtain a composite plate and strip blank.

8. The preparation method according to claim 7, characterized in that: The continuous casting speed is 200 mm / min to 3000 mm / min.

9. The preparation method according to claim 1, characterized in that: The peeling force of the composite strip at room temperature is 80N / mm to 200N / mm.

10. The preparation method according to any one of claims 1 to 9, characterized in that: The preparation method further comprises: The trimming step is to perform trimming treatment on the edge of the composite plate strip.

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