CN115591941A - Deep-cooling auxiliary wave flattening solid-liquid cast-rolling composite equipment and method for bimetal composite plate strip - Google Patents
Deep-cooling auxiliary wave flattening solid-liquid cast-rolling composite equipment and method for bimetal composite plate strip Download PDFInfo
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Abstract
The invention belongs to the technical field of bimetal composite plate strip forming, and particularly relates to a bimetal composite plate strip cryogenic auxiliary corrugated flat solid-liquid cast-rolling composite device and a method thereof.
Description
Technical Field
The invention belongs to the technical field of bimetal composite plate strip forming, and particularly relates to a deep cooling auxiliary wave flattening solid-liquid cast rolling composite device and method for a bimetal composite plate strip.
Background
The bimetal composite plate strip is a novel functional structure integrated composite material which realizes interface combination by two group element metals in a mechanical or metallurgical mode, has the performance advantages of the two materials, can reduce the material cost, and is expected to be widely applied to important fields of national defense and military industry, ocean engineering, petrochemical industry and the like; the rolling composite method is the most promising layered metal composite plate preparation technology due to the advantages of stable process, continuous forming, high production efficiency and the like; however, due to the obvious differences of physical, chemical and mechanical properties of the component metals, the traditional rolling and compounding process has obvious deformation discordance, so that the prepared bimetal composite plate still has key technical bottlenecks of low bonding strength, poor plate quality, large residual stress and the like.
Aiming at the bottleneck problems of low bonding strength, poor plate shape, large residual stress and the like in the traditional rolling composite process, ZL201410028776.4 and ZL201410028975.5 propose a two-pass flat rolling composite process of a corrugated roller, wherein the 1 st pass is rough rolling, and a rolling scheme of a corrugated roller and a flat roller is adopted, wherein the upper roller is a corrugated roller and corresponds to a metal which is difficult to deform, the lower roller is a flat roller and corresponds to a metal which is easy to deform, the 2 nd pass is finish rolling, and the surface of the composite plate is corrugated and flattened by adopting the rolling scheme of the flat roller and the flat roller; in addition, because the extension is large and the corrugation height is limited in the rolling composite process, the regulation and control effect of component coordinated deformation is limited only by pre-storing the volume of the hard-to-deform solid base plate strip in the corrugation forming process, and the further popularization of the technology is limited.
The solid-liquid cast-rolling composite process integrates a casting composite process and a rolling composite process, can realize the efficient continuous near-final forming of the bimetal composite strip, but has very obvious problems of composite interface oxidation, remelting and the like, and remarkably reduces the comprehensive performance of the composite strip due to intermetallic compounds generated at the composite interface at high temperature, the segregation of the cast-rolling state coating metal center and the like; 202210153034.9 proposes a double-layer metal composite plate wave-flat casting and rolling device and a method, but the method arranges a solid substrate plate strip on the side of a flat roller and a liquid coating metal on the side of a corrugated roller, and although the micro-amplitude stirring action of the corrugated roller can play a role in restraining segregation, the temperature of the solid substrate plate strip which is difficult to deform is low, the temperature of the coating metal which is easy to deform is high, the problems of incongruity in deformation represented by warping and tearing, large residual stress and the like are very prominent, and the grain refinement of a composite interface and the formation of a three-dimensional space interface cannot be promoted.
In the face of huge market demands, the product types, the size specifications, the production efficiency and the like of the existing bimetal composite plate strip need to be improved urgently, and a continuous near-net forming process which has high efficiency, short flow and low energy consumption and simultaneously obtains a high-strength interface metallurgical bonding effect, good plate shape quality and lower residual stress becomes a key research direction for accelerating the industrial application process of the bimetal composite plate strip.
Disclosure of Invention
The invention provides a bimetal composite plate strip deep cooling auxiliary wave flattening-liquid cast rolling composite device and a method aiming at the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a solid-liquid cast-rolling set-up equipment is rolled to supplementary ripples of bimetal composite board belt cryrogenic, cryrogenic processing apparatus, ripple auxiliary roller, solid-liquid cast-rolling set-up, smelting furnace, front-box, cloth stream ware and hot rolling set-up, the decoiler is used for continuously seeing off solid-state base plate belt, solid-state base plate belt gets into solid-liquid cast-rolling set-up through cryrogenic processing apparatus and ripple auxiliary roller in proper order, the smelting furnace is used for continuously pouring liquid cladding metal, liquid cladding metal gets into solid-liquid cast-rolling set-up through front-box and cloth stream ware in proper order, liquid cladding metal and solid-state base plate belt become required finished product composite board belt after solid-liquid cast-rolling set-up and hot rolling set-up's rolling is compound.
Further, the solid-liquid casting and rolling composite device comprises a corrugated casting roller and a flat casting roller which are oppositely arranged up and down, and the corrugated casting roller is meshed with the corrugated auxiliary roller and is used for performing corrugated prefabrication and forming on the solid matrix plate strip.
Still further, the hot rolling composite device comprises two flat rolls which are arranged oppositely up and down.
Furthermore, the corrugation type of the corrugated auxiliary roll and the corrugation type of the corrugated casting roll are the same, the corrugation curve is any one of a sine curve, a circular arc, a triangle, a trapezoid or a spline curve, and the height of the corrugation on the corrugated casting roll is less than 1/3 of the thickness of the cladding metal.
A deep cooling auxiliary wave flattening-liquid cast rolling composite method for a bimetal composite plate strip comprises the following steps:
s1, uncoiling a solid substrate plate strip by an uncoiler, passing through a cryogenic treatment device to cool to a target temperature T1, prefabricating the solid substrate plate strip into a corrugated shape through a corrugated auxiliary roller and a corrugated casting roller, then entering a solid-liquid casting and rolling composite device, and tightly attaching the solid substrate plate strip and the corrugated casting roller;
s2, smelting liquid cladding metal by a smelting furnace, pouring the liquid cladding metal at a target temperature T2, sequentially flowing through a front box and a flow distributor, entering a solid-liquid cast-rolling composite device, and carrying out solid-liquid cast-rolling composite with the corrugated solid base plate strip to prepare the corrugated composite plate strip;
and S3, the corrugated composite plate strip enters a hot rolling composite device to be subjected to smooth rolling composite, the surface corrugations of the corrugated composite plate strip are rolled flat, and a finished composite plate strip with a macroscopic or microscopic corrugated composite interface is obtained.
Further, the reduction of the corrugated composite plate strip in the hot rolling composite device is greater than the height of corrugations on the corrugated composite plate strip.
Further, in the step S1, the target temperature T1 is-196 to 0 ℃.
Compared with the prior art, the invention has the following advantages:
according to the invention, the plasticity of the solid matrix plate strip is improved by using ultralow temperature cryogenic treatment, so that the solid matrix plate strip can be prefabricated into a corrugated shape through the corrugated auxiliary roller and the corrugated casting roller, the pre-storage volume is realized while the plasticity is improved, and the coordinated deformation of component metals in the solid-liquid casting and rolling composite process and the hot rolling composite process is promoted;
the solid substrate plate strip subjected to cryogenic treatment is prefabricated into a corrugated shape through the corrugated auxiliary roller and the corrugated casting roller, the solid substrate plate strip is tightly attached to the corrugated casting roller, a molten pool can be stirred in a micro-amplitude mode through a corrugated interface of the solid substrate plate strip, and the phenomenon of coating metal center segregation is improved;
in the solid-liquid cast-rolling compounding process, the temperature of the solid substrate plate strip subjected to cryogenic treatment is in the range of-196 to 0 ℃, and a remarkable temperature gradient exists between the solid substrate plate strip and liquid coating metal, so that an ultrafine grain size and a high-quality solidification structure can be formed at a compounding interface, and the high-strength metallurgical bonding of the compounding interface is promoted;
according to the invention, the preformed corrugated base metal and the liquid cladding metal are compounded, the corrugated casting roller forms local strong stress at the wave trough of the corrugated composite plate strip in the solid-liquid casting-rolling compounding process, and the flat roller forms local strong stress at the wave crest of the corrugated composite plate strip in the hot rolling compounding process, so that the heterogeneous metal rolling compounding is promoted, the residual stress is reduced, the macroscopic or microscopic compound interface with spatial characteristics can be accurately regulated and controlled, the interface bonding strength is obviously improved, and the high-strength metallurgical bonding is realized;
the method adopts the cryogenic treatment to the solid base plate strip, can improve the strength, toughness and wear resistance of the solid base plate strip, is beneficial to the prefabrication of the solid base plate strip into a corrugated shape, coordinates the deformation of component metals, improves the degree of supercooling of solidification nucleation, reduces the thermal shock effect by controlling the cooling rate, has simple and convenient operation, no pollution and low cost, and has considerable economic benefit and market prospect.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a low temperature tensile stress strain curve of the titanium/aluminum composite strip of the present invention;
in the figure, an uncoiler-1, a cryogenic treatment device-2, a corrugated auxiliary roller-3, a solid-liquid cast-rolling composite device-4, a smelting furnace-5, a front box-6, a flow distributor-7, a hot rolling composite device-8, a corrugated composite plate strip-9 and a finished composite plate strip-10.
Detailed Description
In order to further illustrate the technical solution of the present invention, the present invention is further illustrated by the following examples.
Example 1
As shown in fig. 1, a cryogenic auxiliary waveflattening solid-liquid cast-rolling compound device for a bimetal compound plate strip comprises an uncoiler 1, a cryogenic treatment device 2, a corrugated auxiliary roller 3, a solid-liquid cast-rolling compound device 4, a smelting furnace 5, a front box 6, a flow distributor 7 and a hot rolling compound device 8, wherein the uncoiler 1 is used for continuously feeding out a solid base plate strip, the solid base plate strip sequentially passes through the cryogenic treatment device 2 and the corrugated auxiliary roller 3 and enters the solid-liquid cast-rolling compound device 4, the smelting furnace 5 is used for continuously casting liquid cladding metal, the liquid cladding metal sequentially passes through the front box 6 and the flow distributor 7 and enters the solid-liquid cast-rolling compound device 4, and the liquid cladding metal and the solid base plate strip are rolled and compounded by the solid-liquid cast-rolling compound device 4 and the hot rolling compound device 8 to form a required finished product compound plate strip 10;
the solid-liquid casting-rolling composite device 4 comprises a corrugated casting roll and a flat casting roll which are oppositely arranged up and down, the corrugated casting roll is meshed with a corrugated auxiliary roll 3 and is used for performing corrugated prefabrication forming on the solid base plate strip, the corrugated auxiliary roll 3 and the corrugated casting roll are the same in type, a corrugated curve is any one of a sine curve, an arc curve, a triangle curve, a trapezoid curve or a spline curve, and the height of corrugations on the corrugated casting roll is less than 1/3 of the thickness of cladding metal;
the hot rolling compound device 8 comprises two flat rolls which are arranged oppositely up and down.
A deep cooling auxiliary wave flattening-liquid cast rolling composite method for a bimetal composite plate strip comprises the following steps:
s1, uncoiling a solid substrate plate strip by an uncoiler 1, passing through a cryogenic treatment device 2, cooling to a target temperature T1, wherein the target temperature T1 is-196 to 0 ℃, prefabricating the solid substrate plate strip into a corrugated shape through a corrugated auxiliary roller 3 and a corrugated casting roller, then entering a solid-liquid casting and rolling composite device 4, and tightly attaching the solid substrate plate strip and the corrugated casting roller;
s2, smelting liquid cladding metal by a smelting furnace 5, pouring the liquid cladding metal at a target temperature T2, sequentially flowing through a front box 6 and a flow distributor 7, entering a solid-liquid cast-rolling composite device 4, and carrying out solid-liquid cast-rolling composite with the corrugated solid base plate strip to prepare a corrugated composite plate strip 9;
and S3, enabling the corrugated composite plate strip 9 to enter a hot rolling composite device 8 for flat rolling composite, wherein the rolling reduction of the corrugated composite plate strip 9 in the hot rolling composite device 8 is greater than the height of the corrugations on the corrugated composite plate strip 9, and the surface corrugations of the corrugated composite plate strip 9 are rolled flat to prepare a finished composite plate strip 10 with a macroscopic or microscopic corrugated composite interface.
Example 2
Preparing a titanium/aluminum composite plate strip by adopting a deep cooling auxiliary wave flat solid-liquid cast rolling composite device and a method;
the solid matrix plate strip is pure titanium TA2, the width is 1000mm, the thickness is 0.5 mm, the liquid coating metal is aluminum alloy 6061, the target width is 1000mm, and the thickness is 7mm; the corrugation type of the corrugated auxiliary roller 3 and the corrugation casting roller is a sine curve, the diameter of the corrugation casting roller and the plain casting roller of the solid-liquid casting and rolling composite device 4 is 400mm, the corrugation casting roller is circumferentially and uniformly distributed with sine corrugations with the corrugation height of 2mm, the diameter of the plain casting roller of the hot rolling composite device 8 is 200mm, the deep cooling treatment device 2 adopts a gas method, and the precise deep cooling treatment is carried out on the solid matrix plate strip by utilizing the latent heat of vaporization of nitrogen.
The preparation steps are as follows:
s1, uncoiling a solid substrate plate strip by an uncoiler 1, passing through a cryogenic treatment device 2, cooling to a target temperature T1= -100 ℃, performing prefabrication into a corrugated shape with a corrugated casting roller through a corrugated auxiliary roller 3, then entering a solid-liquid casting-rolling composite device 4, and tightly attaching to the corrugated casting roller;
s2, smelting liquid cladding metal by a smelting furnace 5, pouring the liquid cladding metal at a target temperature T2=700 ℃, sequentially flowing through a front box 6 and a distributor 7, entering a solid-liquid cast-rolling composite device 4, and carrying out solid-liquid cast-rolling composite with the corrugated solid base plate strip to prepare a corrugated composite plate strip 9;
and S3, enabling the corrugated composite plate strip 9 to enter a hot rolling composite device 8 for carrying out smooth rolling composite, wherein the rolling reduction is 3mm, and the surface corrugations of the corrugated composite plate strip 9 are rolled flat to prepare a finished composite plate strip 10 with a microscopic corrugated composite interface.
The peeling experiment is carried out on the finished product composite plate strip 10, and the result shows that the peeling fracture position of the titanium/aluminum composite plate strip is positioned at the side of the aluminum matrix, the peeling strength reaches 50N/mm, namely the interface bonding strength is greater than the strength of the aluminum matrix and is far greater than the peeling strength of the titanium/aluminum composite plate strip prepared by the traditional solid-liquid casting-rolling composite process by 20N/mm, the composite interface crystal grains are refined, and the high-strength metallurgical bonding of the composite interface is realized.
In addition, as shown in fig. 2, the low-temperature tensile stress-strain curve of the titanium/aluminum composite plate strip shows that as the tensile temperature is reduced, both the tensile stress and the elongation of the titanium/aluminum composite plate strip are improved, that is, the cryogenic treatment can improve the plasticity of the component metals and the capability of the component metals in coordinated deformation.
Example 3
Preparing a steel/copper composite plate strip by adopting deep cooling auxiliary wave flattening solid-liquid cast rolling composite equipment and a method;
the solid substrate plate strip is made of 316L stainless steel, the width is 1500mm, the thickness is 0.8 mm, the liquid coating metal is pure copper T2, the target width is 1500mm, and the thickness is 8mm; the corrugation type of the corrugated auxiliary roller 3 and the corrugated casting roller is a spline curve, the diameter of the corrugated casting roller and the flat casting roller of the solid-liquid casting and rolling composite device 4 is 500mm, the spline curve with the corrugation height of 2mm is uniformly distributed in the circumferential direction of the corrugated casting roller, the diameter of the flat rolling roller of the hot rolling composite device 8 is 250mm, and the deep cooling treatment device 2 adopts a gas method and utilizes the latent heat of vaporization of nitrogen to carry out accurate deep cooling treatment on the solid base plate strip.
The preparation steps are as follows:
s1, uncoiling a solid substrate plate strip by an uncoiler 1, passing through a cryogenic treatment device 2, cooling to a target temperature T1= -140 ℃, performing prefabrication into a corrugated shape with a corrugated casting roller through a corrugated auxiliary roller 3, then entering a solid-liquid casting-rolling composite device 4, and tightly attaching to the corrugated casting roller;
s2, smelting liquid cladding metal by a smelting furnace 5, pouring the liquid cladding metal at a target temperature T2=1100 ℃, sequentially flowing through a front box 6 and a distributor 7, entering a solid-liquid cast-rolling composite device 4, and carrying out solid-liquid cast-rolling composite with the corrugated solid base plate strip to prepare a corrugated composite plate strip 9;
and S3, enabling the corrugated composite plate strip 9 to enter a hot rolling composite device 8 for carrying out smooth rolling composite, wherein the rolling reduction is 2.5mm, and the surface corrugations of the corrugated composite plate strip 9 are rolled flat to prepare a finished composite plate strip 10 with a macroscopic corrugation composite interface.
The finished composite plate strip 10 is subjected to a stripping experiment, and the result shows that the stripping fracture position of the steel/copper composite plate strip is positioned on the side of a copper matrix, the stripping strength reaches 90N/mm, namely the interface bonding strength is greater than the copper matrix strength and is far greater than the stripping strength of the steel/copper composite plate strip prepared by the traditional solid-liquid cast-rolling composite process by 40N/mm, the composite interface crystal grains are refined, and the high-strength metallurgical bonding of the composite interface is realized.
While there have been shown and described what are at present considered to be the essential features and advantages of the invention, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of being embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A bimetal composite plate belt deep cooling auxiliary wave flat solid-liquid cast rolling composite device is characterized in that: including decoiler (1), cryogenic treatment device (2), ripple auxiliary roll (3), solid-liquid cast rolling set composite (4), smelting furnace (5), front box (6), cloth stream ware (7) and hot rolling set composite (8), decoiler (1) is used for continuously seeing off solid-state matrix slab band, solid-state matrix slab band gets into solid-liquid cast rolling set composite (4) through cryogenic treatment device (2) and ripple auxiliary roll (3) in proper order, smelting furnace (5) are used for continuously pouring liquid cladding metal, liquid cladding metal gets into solid-liquid cast rolling set composite (4) through front box (6) and cloth stream ware (7) in proper order, liquid cladding metal and solid-state matrix slab band become required finished product composite slab band (10) after the rolling of solid-liquid cast rolling set composite (4) and hot rolling set composite (8) is compound.
2. The deep-cooling auxiliary wave flattening-liquid cast-rolling compound equipment for the bimetal compound plate strip according to claim 1, characterized in that: the solid-liquid casting-rolling composite device (4) comprises a corrugated casting roller and a flat casting roller which are oppositely arranged up and down, and the corrugated casting roller is meshed with the corrugated auxiliary roller (3) and is used for performing corrugated prefabrication and forming on the solid substrate plate strip.
3. The deep cooling auxiliary wave flattening-liquid cast-rolling compound equipment for the bimetal compound plate strip according to claim 1, is characterized in that: the hot rolling composite device (8) comprises two flat rollers which are arranged oppositely up and down.
4. The deep cooling auxiliary wave flattening-liquid cast-rolling compound equipment for the bimetal compound plate strip according to claim 1, is characterized in that: the corrugation type of the corrugation auxiliary roller (3) is the same as that of the corrugation casting roller, the corrugation curve is any one of a sine curve, an arc curve, a triangle curve, a trapezoid curve or a spline curve, and the height of the corrugation on the corrugation casting roller is smaller than 1/3 of the thickness of the cladding metal.
5. The method for compounding the deep-cooling auxiliary wave flattening-liquid cast-rolling compound equipment for the bimetal compound plate strip according to claim 1 is characterized by comprising the following steps of: the method comprises the following steps:
s1, uncoiling a solid substrate plate strip by an uncoiler (1), passing through a cryogenic treatment device (2) to be cooled to a target temperature T1, prefabricating the solid substrate plate strip into a corrugated shape through a corrugated auxiliary roller (3) and a corrugated casting roller, then entering a solid-liquid casting and rolling composite device (4), and tightly attaching the solid substrate plate strip and the corrugated casting roller;
s2, smelting the liquid cladding metal by a smelting furnace (5) and pouring the liquid cladding metal at a target temperature T2, sequentially flowing through a front box (6) and a flow distributor (7), entering a solid-liquid cast-rolling composite device (4), and carrying out solid-liquid cast-rolling composite with the corrugated solid base plate strip to prepare a corrugated composite plate strip (9);
and S3, the corrugated composite plate strip (9) enters a hot rolling composite device (8) for flat rolling composite, the surface corrugations of the corrugated composite plate strip (9) are rolled flat, and a finished composite plate strip (10) with a macroscopic or microscopic corrugated composite interface is obtained.
6. The deep cooling auxiliary wave flattening-liquid cast-rolling composite method for the bimetal composite plate strip according to claim 5, is characterized in that: the reduction of the corrugated composite plate strip (9) in the hot rolling composite device (8) is greater than the height of the corrugations on the corrugated composite plate strip (9).
7. The deep cooling auxiliary wave flattening-liquid cast-rolling compounding method for the bimetal composite plate strip according to claim 5, characterized by comprising the following steps of: in the step S1, the target temperature T1 is-196 to 0 ℃.
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| CN116393512A (en) * | 2023-06-08 | 2023-07-07 | 太原理工大学 | Efficient roll forming method for high-performance steel-aluminum alloy transition joint |
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